This study examined the prevalence of congenital absence (agenesis) of maxillary lateral incisors in 2,200 orthodontic patients of Arab descent in Israel. The researchers reviewed panoramic radiographs from 2006-2013 and found that 24 patients, or 1.1%, had agenesis of one or both maxillary lateral incisors. Specifically, 13 females (54.2%) and 11 males (45.8%) were missing their lateral incisors. This suggests the prevalence of maxillary lateral incisor agenesis in this population is 1.1%, providing data to compare to other studies on tooth agenesis frequencies.
Treatment of Patients With Congenitally Missing Lateral Incisors: Is an Inter...Abu-Hussein Muhamad
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. The available treatment modalities to replace congenitally missing teeth include prosthodontic fixed and removable prostheses, resin bonded retainers, orthodontic movement of maxillary canine to the lateral incisor site and single tooth implants. Dental implants offer a promising treatment option for placement of congenitally missing teeth. Interdisciplinary approach may be needed in these cases. This article aims to present a case report of replacement of bilaterally congenitally missing maxillary lateral incisors with dental implants.
Unilateral Maxillary Lateral Incisor Agenesis with Mini Implant Prostheses: A...Abu-Hussein Muhamad
Orthodontic management for patients with single or bilateral congenitally missing permanent lateral incisors is a
challenge to effective treatment planning. Over the last several decades, dentistry has focused on several treatment
modalities for replacement of missing teeth. The two major alternative treatment options are orthodontic space
closure or space opening for prosthetic replacements. For patients with high aesthetic expectations implants are one
of the treatment of choices, especially when it comes to replacement of missing maxillary lateral incisors and
mandibular incisors. Edentulous areas where the available bone is compromised to use conventional implants with
2.5 mm or more in diameter, narrow diameter implants with less than 2.5 mm diameter can be successfully used.
This case report deals with managing a compromised situation in the region of maxillary lateral incisor using a
narrow diameter implant.
Two Treatment Approaches for Missing Maxillary Lateral Incisors: A CaseAbu-Hussein Muhamad
Missing maxillary lateral incisors create an esthetic problem with specific orthodontic and prosthetic considerations. The aim of the present study is to evaluate the clinical success of the transmucosal flapless implant placement and immediate loading of the implants to restore the agenic lateral incisors after completing the orthodontic treatment and during the retention period.
Managing congenitally missing lateral incisors with single tooth implants Abu-Hussein Muhamad
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. Several treatment
options exist for the replacement of congenitally missing lateral incisors. These options include canine substitution, resin bonded fixed partial dentures, cantilevered
fixed partial dentures, conventional fixed partial dentures and single tooth implants. Depending on which treatment option is chosen, a specific criterion has to be
addressed. Interdisciplinary treatment plays a vital role to achieve an excellent, esthetic result for a most predictable outcome. This paper describes the therapeutic use
of osseointegrated implants to replace congenitally missing upper lateral incisors. Highlighting the importance of the Orthodontic/Restorative interface.
Congenitally Missing Lateral Incisors; Orthodontic, Restorative, and Implant ...Abu-Hussein Muhamad
This article discusses factors in determining
whether to close an open space or to open enough space for a prosthetic treatment for congenitally missing maxillary lateral
incisors. Further, the importance of a total treatment approach using an interdisciplinary dental specialty team to maximize
function, aesthetics, and oral health is discussed.
Prosthodontic-Orthodontic Treatment Plan with Two-Unit Cantilevered Resin-Bon...Abu-Hussein Muhamad
Abstract: Congenitally missing lateral incisors create an esthetic problem with specific orthodontic and prosthetic considerations. Selecting the appropriate treatment option depends on many factors, such us the malocclusion, the anterior relationship, specific space requirements, bone volume, root proximity, the condition of the adjacent teeth, and esthetic prediction mainly when the canine must be reshaped.Resin bonded bridges were considered to be doomed owing to their very high decementation rate, have come alive once again because of newer resin based cements. This article will discuss the variety of treatment managements in case of space opening and treated with two 2-unit cantilevered resin-bonded fixed partial dentures supported by the cuspids. This conservative treatment plan was cost-effective without having any significant biological cost. Keywords: Agenesis, Resin- bonded fixed partial denture, interim prosthesis.
Multidisciplinary Approach in the Rehabilitation of Congenitally Maxillary C...Abu-Hussein Muhamad
Objective: This case report describes the multidisciplinary
approach to treat a congenitally missed maxillary canine, how to
improve patient’s smile using orthodontic fixed appliance, endosseous
dental implant, and porcelain veneer to achieve the treatment results of
function and esthetic.
Materials and procedures: Unilateral agenesis of the permanent
maxillary canines in healthy individuals is extremely rare. This
paper presents the case of a female patient diagnosed with congenital
unilateral agenesis of the permanent maxillary canines as well as
occlusal abnormalities in the form of left-side crossbite. To restore the
proper aesthetics and function, interdisciplinary therapeutic treatment
was implemented. In the case presented in this paper, the aim of
oral rehabilitation was to restore a functional balance by obtaining
proper skeletal relationships, creating optimal occlusal conditions and
obtaining arch continuity.
Conclusion: Interdisciplinary treatment combined of orthodontics,
implant surgery, and prosthodontics was useful to treat a nonsyndromic
oligodontia patient. Especially, with the new strategy, implantanchored
orthodontics, which can facilitate the treatmentand make it
more simply with greater predictability.
Treatment of Patients With Congenitally Missing Lateral Incisors: Is an Inter...Abu-Hussein Muhamad
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. The available treatment modalities to replace congenitally missing teeth include prosthodontic fixed and removable prostheses, resin bonded retainers, orthodontic movement of maxillary canine to the lateral incisor site and single tooth implants. Dental implants offer a promising treatment option for placement of congenitally missing teeth. Interdisciplinary approach may be needed in these cases. This article aims to present a case report of replacement of bilaterally congenitally missing maxillary lateral incisors with dental implants.
Unilateral Maxillary Lateral Incisor Agenesis with Mini Implant Prostheses: A...Abu-Hussein Muhamad
Orthodontic management for patients with single or bilateral congenitally missing permanent lateral incisors is a
challenge to effective treatment planning. Over the last several decades, dentistry has focused on several treatment
modalities for replacement of missing teeth. The two major alternative treatment options are orthodontic space
closure or space opening for prosthetic replacements. For patients with high aesthetic expectations implants are one
of the treatment of choices, especially when it comes to replacement of missing maxillary lateral incisors and
mandibular incisors. Edentulous areas where the available bone is compromised to use conventional implants with
2.5 mm or more in diameter, narrow diameter implants with less than 2.5 mm diameter can be successfully used.
This case report deals with managing a compromised situation in the region of maxillary lateral incisor using a
narrow diameter implant.
Two Treatment Approaches for Missing Maxillary Lateral Incisors: A CaseAbu-Hussein Muhamad
Missing maxillary lateral incisors create an esthetic problem with specific orthodontic and prosthetic considerations. The aim of the present study is to evaluate the clinical success of the transmucosal flapless implant placement and immediate loading of the implants to restore the agenic lateral incisors after completing the orthodontic treatment and during the retention period.
Managing congenitally missing lateral incisors with single tooth implants Abu-Hussein Muhamad
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. Several treatment
options exist for the replacement of congenitally missing lateral incisors. These options include canine substitution, resin bonded fixed partial dentures, cantilevered
fixed partial dentures, conventional fixed partial dentures and single tooth implants. Depending on which treatment option is chosen, a specific criterion has to be
addressed. Interdisciplinary treatment plays a vital role to achieve an excellent, esthetic result for a most predictable outcome. This paper describes the therapeutic use
of osseointegrated implants to replace congenitally missing upper lateral incisors. Highlighting the importance of the Orthodontic/Restorative interface.
Congenitally Missing Lateral Incisors; Orthodontic, Restorative, and Implant ...Abu-Hussein Muhamad
This article discusses factors in determining
whether to close an open space or to open enough space for a prosthetic treatment for congenitally missing maxillary lateral
incisors. Further, the importance of a total treatment approach using an interdisciplinary dental specialty team to maximize
function, aesthetics, and oral health is discussed.
Prosthodontic-Orthodontic Treatment Plan with Two-Unit Cantilevered Resin-Bon...Abu-Hussein Muhamad
Abstract: Congenitally missing lateral incisors create an esthetic problem with specific orthodontic and prosthetic considerations. Selecting the appropriate treatment option depends on many factors, such us the malocclusion, the anterior relationship, specific space requirements, bone volume, root proximity, the condition of the adjacent teeth, and esthetic prediction mainly when the canine must be reshaped.Resin bonded bridges were considered to be doomed owing to their very high decementation rate, have come alive once again because of newer resin based cements. This article will discuss the variety of treatment managements in case of space opening and treated with two 2-unit cantilevered resin-bonded fixed partial dentures supported by the cuspids. This conservative treatment plan was cost-effective without having any significant biological cost. Keywords: Agenesis, Resin- bonded fixed partial denture, interim prosthesis.
Multidisciplinary Approach in the Rehabilitation of Congenitally Maxillary C...Abu-Hussein Muhamad
Objective: This case report describes the multidisciplinary
approach to treat a congenitally missed maxillary canine, how to
improve patient’s smile using orthodontic fixed appliance, endosseous
dental implant, and porcelain veneer to achieve the treatment results of
function and esthetic.
Materials and procedures: Unilateral agenesis of the permanent
maxillary canines in healthy individuals is extremely rare. This
paper presents the case of a female patient diagnosed with congenital
unilateral agenesis of the permanent maxillary canines as well as
occlusal abnormalities in the form of left-side crossbite. To restore the
proper aesthetics and function, interdisciplinary therapeutic treatment
was implemented. In the case presented in this paper, the aim of
oral rehabilitation was to restore a functional balance by obtaining
proper skeletal relationships, creating optimal occlusal conditions and
obtaining arch continuity.
Conclusion: Interdisciplinary treatment combined of orthodontics,
implant surgery, and prosthodontics was useful to treat a nonsyndromic
oligodontia patient. Especially, with the new strategy, implantanchored
orthodontics, which can facilitate the treatmentand make it
more simply with greater predictability.
Modern Treatment for Congenitally Missing Teeth : A Multidisciplinary Appro...Abu-Hussein Muhamad
The maxillary lateral incisor is the second most common congenitally absent tooth. There are several treatment options for replacing the missing maxillary lateral incisor, including canine substitution, tooth-supported restoration, or single-tooth implant. Dental implants are an appropriate treatment option for replacing missing maxillary lateral incisor teeth in adolescents when their dental and skeletal development is complete. This case report presents the treatment of a patient with congenitally missing maxillary lateral incisors using dental implants. Finally, the importance of interdisciplinary team treatment planning is emphasized as a requirement for achieving optimal final esthetics
Prosthodontic-Orthodontic Treatment Plan with Two-Unit Cantilevered Resin-Bon...iosrjce
IOSR Journal of Dental and Medical Sciences is one of the speciality Journal in Dental Science and Medical Science published by International Organization of Scientific Research (IOSR). The Journal publishes papers of the highest scientific merit and widest possible scope work in all areas related to medical and dental science. The Journal welcome review articles, leading medical and clinical research articles, technical notes, case reports and others.
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. The available treatment modalities to replace congenitally missing teeth include prosthodontic fixed and removable prostheses, resin bonded retainers, orthodontic movement of maxillary canine to the lateral incisor site and single tooth implants. Implants are a viable option for replacement of congenitally missing lateral incisors and should be considered before the commencement of definitive treatment plan. Early diagnosis, and proper planning can achieve excellent aesthetics. Interdisciplinary treatment plays a vital role to achieve an excellent, esthetic result for a most predictable outcome. This article aims to present a case report of replacement of bilaterally ,congenitally missing maxillary lateral incisors with dental implants .
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. The available treatment modalities to replace congenitally missing teeth include prosthodontic fixed and removable prostheses, resin bonded retainers, orthodontic movement of maxillary canine to the lateral incisor site and single tooth implants. Implants are a viable option for replacement of congenitally missing lateral incisors and should be considered before the commencement of definitive treatment plan. Early diagnosis, and proper planning can achieve excellent aesthetics.
Interdisciplinary treatment plays a vital role to achieve an excellent, esthetic result for a most predictable outcome. This article aims to present a case report of replacement of bilaterally ,congenitally missing maxillary lateral incisors with dental implants .
An Interdisciplinary Approach for Improved Esthetic Results in the Anterior M...Abu-Hussein Muhamad
Maxillary midline diastema is usually the part of normal dental development during mixed dentition which requires no active treatment. But the continuing presence of it in an adult is an esthetic problem. The effective treatment of midline diastema depends on the etiological factors, size andextent of diastema. This clinical report describes a patient with uneven interdental space between anterior maxillary teeth, improper clinical crown lengths, tooth size discrepancies, and malocclusion. Key words: Diastema closure, midline diastema, Orthodontic treatment, Porcelain laminate veneers, Interdisciplinary approach
The management of impacted canines is important in terms of esthetics and function. Clinicians must formulate treatment plans that are in the best interest of the patient and they must be knowledgeable about the variety of treatment options. When patients are evaluated and treated properly, clinicians can reduce the frequency of ectopic eruption and subsequent impaction of the maxillary canine. The simplest interceptive procedure that can be used to prevent impaction of permanent canines is the timely extraction of the primary canines. This procedure usually allows the permanent canines to become upright and erupt properly into the dental arch, provided sufficient space is available to accommodate them. In the present article, an overview of the incidence and sequelae, as well as the surgical, periodontal, and orthodontic considerations in the management of impacted canines is presented.
Autotransplantation of Tooth in Children with Mixed DentitionAbu-Hussein Muhamad
Autotransplantation of tooth in children is the surgical movement of a tooth from one place in the mouth to another
in the similar individual. Once thought to be uncertain, autotransplantation has achieved high success rates and is an
outstanding option for tooth replacement in children. Although the indications for autotransplantation are narrow, careful
patient assortment coupled with a suitable method can lead to exceptional esthetic and useful results. One benefit of
this procedure is that placement of an implant-supported prosthesis or other form of prosthetic tooth replacement is
not needed. A review of the recommended surgical technique as well as success rates is also discussed.
Pre prosthetic orthodontic implant for management of congenitally unerupted l...Abu-Hussein Muhamad
The maxillary lateral incisor is one of the most common congenitally missing teeth of the permanent dentition. With the advent of implants in the field of restorative dentistry, a stable and predictable fixed prosthetic replacement has become a reality, especially for young adult patients who suffer from congenital absence of teeth. The dual goals of establishment of functional stability as well as enhancement of esthetic outcomes are made achievable by the placement of implants. A multidisciplinary team approach involving the triad of orthodontist, periodontist and restorative dentist will ensure the successful completion of the integrated treatment approach in these patients. The present case report achieved successful implant based oral rehabilitation in a patient diagnosed with congenital absence of bilateral maxillary lateral incisors utilizing a preprosthetic orthodontic implant site preparation for the purpose of space gain.
Multidisciplinary approach in the rehabilitation of congenitally missing late...Abu-Hussein Muhamad
Agenesis, the absence of permanent teeth, is a common occurrence among dental patients. The total incidence of tooth agenesis is about 4.2% among patients that are seeking orthodontic treatment and with the exception of third molars, the maxillary lateral incisors are the most common congenitally missing teeth with about a 2% incidence. The maxillary lateral incisor is the second most common congenitally absent tooth. There are several treatment options for replacing the missing maxillary lateral incisor, including canine substitution, tooth-supported restoration, or single-tooth implant. Dental implants are an appropriate treatment option for replacing missing maxillary lateral incisor teeth in adolescents when their dental and skeletal development is complete. This case report presents the treatment of a patient with congenitally missing maxillary lateral incisor using dental implants. The paper discusses the aspects of pre-prosthetic orthodontic diagnosis and the treatment that needs to be considered with conservative and fixed prosthetic replacement.
Esthetic Management of Congenitally Missing Lateral Incisors With Single Toot...Abu-Hussein Muhamad
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. Several treatment options exist for the replacement of congenitally missing lateral incisors.This case report addresses the fundamental considerations related to replacement of a congenitally missing lateral incisor by a team approach.
Interdisciplinary Management of Congenitally Agenesis Maxillary Lateral Incis...Abu-Hussein Muhamad
Abstract: The present paper reports the treatment of a young adult woman with congenitally missing maxillary lateral incisors who underwent orthodontic treatment for improvement of teeth alignment and occlusal balance previous to dental implant surgery. This treatment also allowed appropriate space for the future lateral incisors crowns. Then, Implants were positioned and prosthetic abutments installed. Ceramic laminates were planned on central incisors in order to improve anterior aesthetics. All-ceramic crowns and laminates were made using lithium dissilicate-based ceramic The multidisciplinary association of orthodontic, implant and prosthetic techniques resulted in successful functional and aesthetic rehabilitation of the case, which was maintained after 1 year follow up. Keywords: Dental agenesis. Dental implants. Ceramic laminates. Esthetic.
Modern Treatment for Congenitally Missing Teeth : A Multidisciplinary Appro...Abu-Hussein Muhamad
The maxillary lateral incisor is the second most common congenitally absent tooth. There are several treatment options for replacing the missing maxillary lateral incisor, including canine substitution, tooth-supported restoration, or single-tooth implant. Dental implants are an appropriate treatment option for replacing missing maxillary lateral incisor teeth in adolescents when their dental and skeletal development is complete. This case report presents the treatment of a patient with congenitally missing maxillary lateral incisors using dental implants. Finally, the importance of interdisciplinary team treatment planning is emphasized as a requirement for achieving optimal final esthetics
Prosthodontic-Orthodontic Treatment Plan with Two-Unit Cantilevered Resin-Bon...iosrjce
IOSR Journal of Dental and Medical Sciences is one of the speciality Journal in Dental Science and Medical Science published by International Organization of Scientific Research (IOSR). The Journal publishes papers of the highest scientific merit and widest possible scope work in all areas related to medical and dental science. The Journal welcome review articles, leading medical and clinical research articles, technical notes, case reports and others.
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. The available treatment modalities to replace congenitally missing teeth include prosthodontic fixed and removable prostheses, resin bonded retainers, orthodontic movement of maxillary canine to the lateral incisor site and single tooth implants. Implants are a viable option for replacement of congenitally missing lateral incisors and should be considered before the commencement of definitive treatment plan. Early diagnosis, and proper planning can achieve excellent aesthetics. Interdisciplinary treatment plays a vital role to achieve an excellent, esthetic result for a most predictable outcome. This article aims to present a case report of replacement of bilaterally ,congenitally missing maxillary lateral incisors with dental implants .
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. The available treatment modalities to replace congenitally missing teeth include prosthodontic fixed and removable prostheses, resin bonded retainers, orthodontic movement of maxillary canine to the lateral incisor site and single tooth implants. Implants are a viable option for replacement of congenitally missing lateral incisors and should be considered before the commencement of definitive treatment plan. Early diagnosis, and proper planning can achieve excellent aesthetics.
Interdisciplinary treatment plays a vital role to achieve an excellent, esthetic result for a most predictable outcome. This article aims to present a case report of replacement of bilaterally ,congenitally missing maxillary lateral incisors with dental implants .
An Interdisciplinary Approach for Improved Esthetic Results in the Anterior M...Abu-Hussein Muhamad
Maxillary midline diastema is usually the part of normal dental development during mixed dentition which requires no active treatment. But the continuing presence of it in an adult is an esthetic problem. The effective treatment of midline diastema depends on the etiological factors, size andextent of diastema. This clinical report describes a patient with uneven interdental space between anterior maxillary teeth, improper clinical crown lengths, tooth size discrepancies, and malocclusion. Key words: Diastema closure, midline diastema, Orthodontic treatment, Porcelain laminate veneers, Interdisciplinary approach
The management of impacted canines is important in terms of esthetics and function. Clinicians must formulate treatment plans that are in the best interest of the patient and they must be knowledgeable about the variety of treatment options. When patients are evaluated and treated properly, clinicians can reduce the frequency of ectopic eruption and subsequent impaction of the maxillary canine. The simplest interceptive procedure that can be used to prevent impaction of permanent canines is the timely extraction of the primary canines. This procedure usually allows the permanent canines to become upright and erupt properly into the dental arch, provided sufficient space is available to accommodate them. In the present article, an overview of the incidence and sequelae, as well as the surgical, periodontal, and orthodontic considerations in the management of impacted canines is presented.
Autotransplantation of Tooth in Children with Mixed DentitionAbu-Hussein Muhamad
Autotransplantation of tooth in children is the surgical movement of a tooth from one place in the mouth to another
in the similar individual. Once thought to be uncertain, autotransplantation has achieved high success rates and is an
outstanding option for tooth replacement in children. Although the indications for autotransplantation are narrow, careful
patient assortment coupled with a suitable method can lead to exceptional esthetic and useful results. One benefit of
this procedure is that placement of an implant-supported prosthesis or other form of prosthetic tooth replacement is
not needed. A review of the recommended surgical technique as well as success rates is also discussed.
Pre prosthetic orthodontic implant for management of congenitally unerupted l...Abu-Hussein Muhamad
The maxillary lateral incisor is one of the most common congenitally missing teeth of the permanent dentition. With the advent of implants in the field of restorative dentistry, a stable and predictable fixed prosthetic replacement has become a reality, especially for young adult patients who suffer from congenital absence of teeth. The dual goals of establishment of functional stability as well as enhancement of esthetic outcomes are made achievable by the placement of implants. A multidisciplinary team approach involving the triad of orthodontist, periodontist and restorative dentist will ensure the successful completion of the integrated treatment approach in these patients. The present case report achieved successful implant based oral rehabilitation in a patient diagnosed with congenital absence of bilateral maxillary lateral incisors utilizing a preprosthetic orthodontic implant site preparation for the purpose of space gain.
Multidisciplinary approach in the rehabilitation of congenitally missing late...Abu-Hussein Muhamad
Agenesis, the absence of permanent teeth, is a common occurrence among dental patients. The total incidence of tooth agenesis is about 4.2% among patients that are seeking orthodontic treatment and with the exception of third molars, the maxillary lateral incisors are the most common congenitally missing teeth with about a 2% incidence. The maxillary lateral incisor is the second most common congenitally absent tooth. There are several treatment options for replacing the missing maxillary lateral incisor, including canine substitution, tooth-supported restoration, or single-tooth implant. Dental implants are an appropriate treatment option for replacing missing maxillary lateral incisor teeth in adolescents when their dental and skeletal development is complete. This case report presents the treatment of a patient with congenitally missing maxillary lateral incisor using dental implants. The paper discusses the aspects of pre-prosthetic orthodontic diagnosis and the treatment that needs to be considered with conservative and fixed prosthetic replacement.
Esthetic Management of Congenitally Missing Lateral Incisors With Single Toot...Abu-Hussein Muhamad
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. Several treatment options exist for the replacement of congenitally missing lateral incisors.This case report addresses the fundamental considerations related to replacement of a congenitally missing lateral incisor by a team approach.
Interdisciplinary Management of Congenitally Agenesis Maxillary Lateral Incis...Abu-Hussein Muhamad
Abstract: The present paper reports the treatment of a young adult woman with congenitally missing maxillary lateral incisors who underwent orthodontic treatment for improvement of teeth alignment and occlusal balance previous to dental implant surgery. This treatment also allowed appropriate space for the future lateral incisors crowns. Then, Implants were positioned and prosthetic abutments installed. Ceramic laminates were planned on central incisors in order to improve anterior aesthetics. All-ceramic crowns and laminates were made using lithium dissilicate-based ceramic The multidisciplinary association of orthodontic, implant and prosthetic techniques resulted in successful functional and aesthetic rehabilitation of the case, which was maintained after 1 year follow up. Keywords: Dental agenesis. Dental implants. Ceramic laminates. Esthetic.
Congenitally Missing Bilateral Incisors with Single-Tooth Implants: Clinical ...Abu-Hussein Muhamad
Agenesis, the absence of permanent teeth, is a common occurrence among dental patients. The total incidence of tooth agenesis is about 4.2% among patients that are seeking orthodontic treatment and with the exception of third molars, the maxillary lateral incisors are the most common congenitally missing teeth with about a 2% incidence . Esthetically correcting congenitally missing maxillary lateral incisors is a common challenge that every orthodontist and dental team will face, and dentists must consider the treatment options that are most appropriate for each patient.
This paper describes the therapeutic use of osseointegrated implants to replacε congenitally missing upper lateral incisors. Highlighting the importance of the Orthodontic/Restorative interface.
This infographic will show you few and common Orthodontic Problems. For more information you can visit their site and learn in detail about these matters.
Interdisciplinary Management Of Maxillary Lateral IncisorsAbu-Hussein Muhamad
Abstract: Orthodontic management for patients with single or bilateral congenitally missing permanent lateral incisors is a challenge to effective treatment planning. Over the last several decades, dentistry has focused on several treatment modalities for replacement of missing teeth. The two major alternative treatment options are orthodontic space closure or space opening for prosthetic replacements. For patients with high aesthetic expectations implants are one of the treatment of choices, especially when it comes to replacement of missing maxillary lateral incisors and mandibular incisors. Edentulous areas where the available bone is compromised to use conventional implants with 2,5 mm or more in diameter, narrow diameter implants with less than 2,5 mm diameter can be successfully used. This case report deals with managing a compromised situation in the region of maxillary lateral incisor using a narrow diameter implant. Key words: Orthodontics, Correction of unilateral missing maxillary lateral incisors. Minimal invasive technique, narrow diameter implant
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
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Tooth Agenesis in Orthodontic Patients at Arab Population in IsraelAbu-Hussein Muhamad
Non-syndromic tooth agenesis has been occasionally described in literature and data available for its prevalence is rare in Arabs population in Israel. The purpose of the present retrospective radiographic study was to provide data concerning the prevalence of non-syndromic hypodontia in patients reporting to the Center for Dentistry,Research & Aesthetics, Jatt, Almothalat, Israel
Tooth agenesis is the most prevalent craniofacial congenital anomaly in humans. The term refers to an isolated disorder in the absence of non-dental phenotypes but is also used to describe the manifestation of missing teeth in syndromes. The affected individuals suffer from compromised masticatory functions and have decreased quality of life. Discerning the genetic etiology of tooth agenesis not only improves our understanding of normal tooth development but also provides a fundamental basis for developing potential therapeutic strategies for this anomaly. To date, MSX1, Pax9, Axin2, Eda, And Wnt10a have been established as candidate genes associated with non-syndromic tooth agenesis.This article reviews the recently discovered genes involved in dental agenesis , and provides an update on the aetiological factors underlying this common malformation.
Esthetic Management of Congenitally Missing Lateral Incisors With Single Toot...Abu-Hussein Muhamad
Congenitally missing teeth are frequently presented to the dentist. Interdisciplinary approach may be needed for the proper treatment plan. Several treatment options exist for the replacement of congenitally missing lateral incisors.This case report addresses the fundamental considerations related to replacement of a congenitally missing lateral incisor by a team approach.
IOSR Journal of Dental and Medical Sciences is one of the speciality Journal in Dental Science and Medical Science published by International Organization of Scientific Research (IOSR). The Journal publishes papers of the highest scientific merit and widest possible scope work in all areas related to medical and dental science. The Journal welcome review articles, leading medical and clinical research articles, technical notes, case reports and others.
Tooth agenesis is one of the most common congenital malformations in humans. Hypodontia can either occur as an isolated condition (non-syndromic hypodontia) or can be associated with a syndrome (syndromic hypodontia), highlighting the heterogeneity of the condition. Gene anomalies or mutations in MSX1, PAX9, AXIN2 and EDA genes, appear to be most critical during the development of tooth, leading to various forms of tooth agenesis and systemic features. The aim of this paper is to review the genetic basis of hypodontia and identify the genes that have been definitively implicated in the agenesis of human dentition.
Nonsyndromic Oligodontia in Permanent Dentition: Three Rare CasesAbu-Hussein Muhamad
Oligodontia is the congenital absence of six or more than six teeth in either permanent or primary dentition. Because of the missing teeth in these patients esthetic, functional and psychological problems may arise. This article reports a three rare cases of non-syndromic oligodontia. Key words: oligodontia, hypodontia, severe partial anodontia
Nonsyndromic Oligodontia in Permanent Dentition: Three Rare Casesiosrjce
IOSR Journal of Dental and Medical Sciences is one of the speciality Journal in Dental Science and Medical Science published by International Organization of Scientific Research (IOSR). The Journal publishes papers of the highest scientific merit and widest possible scope work in all areas related to medical and dental science. The Journal welcome review articles, leading medical and clinical research articles, technical notes, case reports and others.
Gingival recession—can orthodontics be a cure? evidence from a case presentationEdwardHAngle
Does orthodontic treatment help or hinder a patient’s periodontal status? What factors affect the
periodontium? Can those factors be managed in a way that remedies existing periodontal issues?
A 35-year-old woman presented with severe gingival recession and a unilateral Class II
malocclusion. The treatment plan was to correct the malocclusion in a way that torques the roots
more onto bone and to change her dental hygiene methods. With an extensive review of the
literature, this case review attempts to make sense of the enigma of gingival recession and
demonstrates an excellent treatment solution to concomitant orthodontic and periodontal
problems.
Congenital absence of maxillary lateral incisors is a frequent clinical challenge which must be solved by a multidisciplinary approach in order to obtain an
esthetic and functional restorative treatment. . Fixed prosthodontic and removable prostheses, resin bonded retainers, orthodontic movement of maxillary
canine to the lateral incisor site and single tooth implants represent the available treatment modalities to replace congenitally missing teeth. This case report
demonstrates the team approach in prosthetic and surgical considerations and techniques for managing the lack of lateral incisors. The aims of this case
report of replacement of bilaterally congenitally missing maxillary lateral incisors with dental implants.
Aesthetic Management of Fractured Anteriors: A Case ReportAbu-Hussein Muhamad
Introduction: Coronal fracture of anterior teeth is an important topic for esthetic dentistry. Such fractures may jeopardize esthetics, function, tissue biology
and occlusal physiology, thus endangering tooth vitality and integrity. Coronal fractures resulting from dental trauma most frequently occur to the maxillary
anterior teeth of adolescents and less frequently to mandibular teeth. Adult teeth may also suffer traumatic fracture, although less frequently than for
adolescents.
Case Report: In our case, an economical and time-saving novel technique has been described for direct composite restoration in a young patient with
uncomplicated fractured maxillary anterior tooth.
Conclusion: As restoring a fractured tooth is a complex procedure, this technique can prove as a simple, effective and appropriate technique that will fulfill all
the requirements of dental personnel. This technique can also prove to be easy for inexperienced beginner clinicians without requiring special skills in
providing the patients with direct composite restorations.
Impacted Maxillary Central Incisors: Surgical Exposure and Orthodontic Treat...Abu-Hussein Muhamad
The maxillary permanent central incisor develops early in life and forms part of an aesthetic smile. Disruption of the formation or eruption of the permanent
central incisor has multiple etiological factors. Treatment options depend to some extent on the cause of failure of eruption of the central incisor. Generally,
the earlier treatment is provided, the higher the likelihood of success and the less the complexity. Our results suggest that close monitoring and interdisciplinary
cooperation during the treatment phases led to a successful esthetic result, with good periodontal health and functional occlusion.
Excess of space in the dental arch is diagnosed as a
generalised spacing or a local divergence, often
observed in the maxillary anterior region, as a median
diastema, traumatic loss of central incisors, or
congenital absence of lateral incisors. Furthermore,
spacing is observed in aging individuals, due to
pathological migration of teeth caused by
periodontitis. Finally, adult individuals with partial
edentulous jaws demand pre-prosthetic orthodontic
treatment from functional aspects. Thus, indication for
orthodontic treatment in subjects with spacing of teeth
exists for aesthetic reasons, but also for facilitating
prosthetic restorations with optimal occlusalstability.
Dental implants represent one of the most successful treatment modalities in dentistry.
However, failures do occur in the range from 5 to 8% for routine procedures and up to 20% in major grafting
cases after at least 5 years of function . The majority of implant losses may be explained as biomechanically
induced failures, since low primary implant stability, low bone density, short implants and overload have been
identified as risk factors . Hence, achievement and maintenance of implant stability are pre-conditions for a
successful clinical outcome with dental implants.
The review focuses on different methods used to assess implant stability and recent advances in this field.
Aesthetic Management of Fractured Anteriors: A Case ReportAbu-Hussein Muhamad
Introduction: Coronal fracture of anterior teeth is an important topic for esthetic dentistry. Such fractures may jeopardize esthetics, function, tissue biology
and occlusal physiology, thus endangering tooth vitality and integrity. Coronal fractures resulting from dental trauma most frequently occur to the maxillary
anterior teeth of adolescents and less frequently to mandibular teeth. Adult teeth may also suffer traumatic fracture, although less frequently than for
adolescents.
Case Report: In our case, an economical and time-saving novel technique has been described for direct composite restoration in a young patient with
uncomplicated fractured maxillary anterior tooth.
Conclusion: As restoring a fractured tooth is a complex procedure, this technique can prove as a simple, effective and appropriate technique that will fulfill all
the requirements of dental personnel. This technique can also prove to be easy for inexperienced beginner clinicians without requiring special skills in
providing the patients with direct composite restorations
Orthodontic tooth movement is basically a biologic response towards a mechanical force. Osteoclast and osteoblast cells mediate bone resorption and apposition, which eventually produces tooth movement. Researches showed that the rate of orthodontic tooth movement can be altered by certain drugs locally or systemically. The Objective of this article is to discuss the current data concerning the effect of drugs on orthodontic tooth movement.
The multifactorial factors influenc cleft Lip-literature review Abu-Hussein Muhamad
Congenital cleft-Lip and cleft palate have been the subject of many genetic
studies, but until recently there has been no consensus as to their modes of
inheritance. In fact, claims have been made for just about every genetic
mechanism one can think of. Recently, however, evidence has been
accumulating that favors a multifactorial basis for these malformations. The
purpose of the present paper is to present the etiology of cleft lip and cleft palate
both the genetic and the environmental factors. It is suggested that the genetic
basis for diverse kinds of common or uncommon congenital malformations may
very well be homogeneous, whilst, at the same, the environmental basis is
heterogeneous.
Dental implants represent one of the most successful treatment modalities in dentistry.
However, failures do occur in the range from 5 to 8% for routine procedures and up to 20% in major grafting cases after at least 5 years of function . The majority of implant losses may be explained as biomechanically induced failures, since low primary implant stability, low bone density, short implants and overload have been identified as risk factors . Hence, achievement and maintenance of implant stability are pre-conditions for a successful clinical outcome with dental implants.
The review focuses on different methods used to assess implant stability and recent advances in this field
Over time, progressively shorter implants have been placed such that short implants are now available that are less than 6 mm in length. The viability and high success rates seen with short implants can be explained by osseointegration, the macro geometric design of the implant, as well as physics and the distribution of forces. This paper was aimed to review the stability and survival rate of short implants under functional loads. Numerical and clinical studies were reviewed. Keywords: Short dental implants, sinus augmentation, factors affecting bone regeneration in dental implantology
Porcelain laminate veneers are among the most esthetic means of creating a more pleasing and beautiful smile. Porcelain veneers within reason allow for the alteration of tooth position, shape, size and color. They require a minimal amount of tooth preparation, approximately 0.5 mm to 0.7mm of surface enamel reduction. This study describes the use of ceramic veneers without tooth wear, reinforcing the concept that minimally invasive porcelain laminate veneers could become versatile and conservative allies in the fi eld of esthetic dentistry. Keywords: Ceramics, dentin-bonding agents, esthetics
Immediate Restoration of Single Implants Replacing Lateral Incisor Compromis...Abu-Hussein Muhamad
Today, the diagnosis of internal root resorption is significantly improved by the three-dimensional imaging. Furthermore, the CBCT’s superior diagnosis accuracy resulted in an improved management of the resorptive defects and a better outcome of Implant therapy of teeth with internal resorption.Implant has become a wide option to maintain periodontal architecture. Diagnosis and treatment planning is the key factors in achieving the successful outcomes after placing and restoring implants placed immediately after tooth extraction. The purpose of this clinical update is to report on the success and survival of Immediate restoration of single implants replacing right lateral incisor compromised by internal resorption.
Immediate Implant Placement And Restoration With Natural Tooth In The Maxilla...Abu-Hussein Muhamad
Anterior tooth loss and restoration in the esthetic zone is a common challenge in dentistry today. The prominent visibility of the area can be especially distressing to the patient and requires a timely and esthetically pleasing solution. Immediate single-tooth implantation followed by immediate provisionalization is becoming an increasingly desirable treatment that offers numerous benefits over conventional delayed loading. Provisionalization for immediately-placed implants using the patient’s existing tooth can enhance the final aesthetic outcome if certain steps are
followed. If the natural tooth is intact and can be used as a provisional, the emergence profile can be very similar to the preoperative condition. This article outlines a technique to use the patient’s natural tooth after extraction to provisionalize an implant.
Clinical Management of Bilateral Impacted Maxillary CaninesAbu-Hussein Muhamad
Introduction: Impaction of maxillary canines is a frequently encountered clinical problem in orthodontic therapy. When a preventive
approach fails, treatment involves surgical exposure of the impacted tooth, followed by orthodontic traction to guide and align it into the
dental arch. The aim of the present report was to demonstrate by case reports of an adult patient with bilateral impacted maxillary canines
treated with surgical exposure and orthodontic treatment.
Material and Methods: A 15year-old female with various degrees of bilateral palatal impaction of maxillary canines were managed
by the described technique.
Results and Discussion: Autonomous eruption of the impacted canines after surgical uncovering was witnessed in all patients
without the need for application of a vertical orthodontic force for their extrusion.
Conclusion: The described method of surgical uncovering and autonomous eruption created conditions for biological eruption of the
palatally impacted canines into the oral cavity and facilitated considerably the subsequent orthodontic treatment for their proper alignment
in the dental arch.
Keywords: Impacted canines; Surgical; Tooth exposure; Orthodontic treatment
“One-Piece” Immediate-Load Post-Extraction Implant In Maxillary Central IncisorAbu-Hussein Muhamad
Abstract: This case report describes extraction of a fractured left maxillary central incisor tooth, followed by immediate placement of an one-piece implant in the prepared socket and temporization by a bonded restoration.
Materials And Methods: The tooth was extracted with minimal hard and soft tissue trauma and without flap reflection. The socket was prepared to the required depth and a Implant was inserted.
Results: The atraumatic operating technique and the immediate insertion of the one-piece Implant resulted in the preservation of the hard and soft tissues at the extraction site.
Conclusion: The “One-piece” dental implant and provisional restoration provided the patient with immediate esthetics, function, comfort and most importantly preservation of tissues. The one-piece implant design resulted in a high cumulative implant survival rate and beneficial marginal bone levels.
Single Visit Replacement of Central Maxillary Using Fiber-Reinforced Composi...Abu-Hussein Muhamad
Fiber reinforced composites are high strength filling materials composed of conventional composites and glass fibres. They exhibit extensive applications in different fields of dentistry. This clinical report present a case where FRC technology was successfully used to restore central maxillary incisor edentulous area in terms of esthetic-cosmetic values and functionality.
Zirconium Dental Implants And Crown for Congenitally Missing Maxillary Latera...Abu-Hussein Muhamad
Zirconia implants were familiarized into dental implantology. Zirconia appears
to be an appropriate implant material due to its low plaque affinity, tooth like color, biocompatibility and mechanical properties. The following a case presentations will show how the acid-etched zirconia Implant can be used to functionally and aesthetically replace congenitally missing left lateral incisor tooth germ in the maxilla, and achieve optimal soft tissues and health.
Surgery of Labially Impacted Canine & Orthodontic Management – A Case ReportAbu-Hussein Muhamad
Maxillary canines are one of the most common teeth that are impacted among patients seeking orthodontic treatment. Depending on the position of these impacted teeth, various surgical techniques have been employed for their exposure. His primary goal of surgical phase is to provide the means for correct position of orthodontic anchorage. Additionally, the technique used must ensure favorable tissue anatomy that will permit long-term maintenance of periodontal health. In the present case, a labially impacted maxillary left canine was surgically exposed using an apically positioned flap. Orthodontic extrusion was carried out further.
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
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Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
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Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Prevalence of Missing Lateral Incisor Agenesis in an Or¬thodontic Arabs Population in Israel(Arab48)
1. International Journal of Public Health Research
2015; X(X): XX-XX
Published online MM DD, 2015 (http://www.openscienceonline.com/journal/ijphr)
Prevalence of Missing Lateral Incisor Agenesis in
an Orthodontic Arabs Population in Israel(Arab48)
Muhamad Abu-Hussein1, *
, Nezar Watted2
, Abdulgani Azzaldeen3
, Mohammad Yehia4
, Obaida Awadi5
,
Yosef Abu-Hussein6
1
University of Naples Federico II, Naples, Italy, Department of Pediatric Dentistry, University of Athens, Greece
2
Clinics and Policlinics for Dental, Oral and Maxillofacial Diseases of the Bavarian Julius-Maximilian-University, Wuerzburg, Germany
3
Department of Conservative Dentistry, Al-Quds University, Jerusalem, Palestine
4
Triangle R&D Center, Kafr Qara, Israel
5
Center for dentistry, research and Aesthetics, Jatt /Israel
6
Statistics and Actuarial Faculty, University of Haifa, Haifa, Israel
Email address:
abuhusseinmuhamad@gmail.com (M. Abu-Hussein)
To cite this article
Muhamad Abu-Hussein, Nezar Watted, Abdulgani Azzaldeen, Mohammad Yehia, Obaida Awadi, Yosef Abu-Hussein. Prevalence of Missing
Lateral Incisor Agenesis in an Orthodontic Arabs Population in Israel(Arab48). International Journal of Public Health Research.
Vol. X, No. X, 2015, pp. XX-XX.
Abstract
Tooth agenesis is defined as congenital absence of one or more teeth in primary or permanent dentition and is a common oral
variation that affects a large population group. Among the missing one’s, maxillary lateral incisor is more frequent causing
esthetic and functional impairments in the affected individual. It might be associated with systemic problems, syndromic
conditions or other oral anomalies. Management of missing lateral incisors involves a multi-disciplinary approach for
rehabilitation of impaired esthetics and function. This study was carried out to determine the prevalence of congenital absence
(agenesis) of maxillary lateral incisors in Arabs population in Israel(Arab48).
Keywords
Tooth Agenesis, Hypodontia, Maxillary Lateral Incisor, Congenitally Missing Teeth, Epidemiology, Arab48
1. Introduction
Many terms can be used to describe missing teeth.
Anodontia is the complete absence of teeth; Oligodontia or
partial anodontia means absence of six or more teeth;
hypodontia denotes missing teeth, but usually less than six
and often the size and shape of remaining teeth are altered as
well, congenitally missing teeth or agenesis is defined as
teeth that failed to develop or are not present at birth.
Agenesis of any tooth can cause dental asymmetries,
alignment difficulties, and arch length discrepancies but
when the missing tooth is in the anterior region of the maxilla,
the discrepancies can be quite noticeable.[1,2]
The maxillary lateral incisor is the second most frequently
missing tooth after the mandibular second premolar even
though Muller et al. found that maxillary lateral incisors
experience the most agenesis (not including third molars).
Agenesis of the maxillary lateral incisor is also linked with
anomalies and syndromes such as agenesis of other
permanent teeth, microdontia of maxillary lateral incisors
(peg laterals), palatally displaced canines and distal
angulations of mandibular second premolars.[1]
Woolf presented data on anomalies associated with
agenesis of the maxillary lateral incisor, such as peg
laterals.[2] His study sample consisted of members of the
Mormon Church in Salt Lake City because of the extensive
family records they keep.
Woolf studied 103 participants who had either unilateral or
bilateral agenesis of the maxillary lateral incisor, and the
relatives of this test group (187 families) from the same area
acting as controls. Results showed that 17.7% of parents and
siblings of the sample population also had agenesis of the
maxillary lateral incisor or pegshaped laterals, compared to
only 2.8% in the control group. Twenty-four of the 103
participants who had agenesis of the maxillary lateral incisor
also had a peg-shaped lateral incisor. Members in the same
family tended to show the same location and pattern of
agenesis (bilateral, unilateral or right versus left). From these
results,
2. 2 Muhamad Abu-Hussein et al.: Prevalence of Missing Lateral Incisor Agenesis in an Orthodontic Arabs Population in Israel(Arab48)
Woolf concluded that some genotypes result specifically in
agenesis of the maxillary lateral incisor, some cause agenesis
of multiple teeth, and some cause agenesis of the maxillary
lateral incisor and anomalies such as peg laterals. Evidence
of a genetic association was demonstrated in this population;
however genetic mapping was not used at the time the study
was conducted in 1971 to verify genetic links.[2]
In the 1975 Symposium on Genetics, Bailit presented on
variations in tooth size, gender, agenesis and race.[4] The
mouth was divided into 3 ‘groups’ per side consisting of
incisors (central and lateral), premolars (first and second) and
molars (first, second and third). The most distal tooth in each
tooth group was shown to be the least stable, except for the
mandibular central incisor, and therefore more likely to be
congenitally missing. This theory of tooth instability is also
known as Butler’s Field Theory.[5]
Bailit theorized that the most distal tooth in a group is
more influenced by environmental factors rather than
genetics. He believed that genetics had a greater affect on the
size of the central incisor, first premolar and first molar
whereas the maxillary lateral incisor, second premolar and
second molar are more affected by the environment. The last
tooth to erupt in a segment (most distal) has a predetermined
space in which to erupt, giving it more phenotypic flexibility.
Bailit stated that except for the maxillary lateral incisors,
tooth sizes are fairly symmetrical bilaterally and when a
maxillary lateral incisor is missing, it is most likely the left
one. At the time the paper was written in 1975, there was
little knowledge about the extent to which genetics affects
agenesis, but Bailit suspected it was important.
Since the development of genetic mapping, Brook et al.
have shown that some genes are implicated in the agenesis of
teeth, including PAX9, MSX1 and AXIN2. The PAX9 gene is
on chromosome 14 with a controlling factor for dental
development and mutations related to missing teeth.[6]
Peck, Peck and Kataja linked palatally displaced canines,
transposition of mandibular lateral incisors and canines and
maxillary canine and premolar transposition with agenesis.[7]
They studied 161 subjects and found that patients with
maxillary canine-first premolar transposition were 13 times
more likely (26%) to have agenesis of a maxillary lateral
incisor. They agreed with Brook et al. that PAX9 and MSX1
mutations contribute to tooth agenesis [6], however they also
pointed out that the PAX9 and MSX1 genetic mutations are
associated with posterior tooth agenesis while a strong
causative gene mutation for anterior agenesis has yet to be
found. Peck, Peck and Kataja believe signaling proteins such
as bone morphogenic proteins (BMP) and fibroblast growth
factor (FGF) may be responsible for agenesis early in
embryonic development.[7,8]
Pirinen et al. focused their research on palatally displaced
canines and agenesis of incisors and premolars.[9] They
examined 106 patients (77 females, 29 males) who had
undergone surgical exposure of a palatally impacted canine
to determine whether they also expressed agenesis. One
hundred and ten first-degree relatives of these patients and 93
second-degree relatives were also examined while pedigrees
were created to establish a genetic link. Results showed that
36% of the test patients exhibited agenesis, which is 4.5
times the population prevalence. First and second-degree
relatives showed 19-20% agenesis or 2.5 times the
population prevalence. This illustrates that there is a strong
genetic link between palatally displaced canines and
agenesis.[9]
Dempsey and Townsend aimed to quantify the relative
contributions of the environment and genetics to the mesio-
distal (MD) and buccal-lingual (BL) sizes of teeth in
monozygotic and dizygotic twins.[10]The MD and BL of 596
participants’ teeth were measured on plaster casts. Different
model analyses were created to separate twin pairs of males
and females, monozygotic twins that were raised apart
(different environments), and dizygotic twins. Mandibular
lateral incisors were found to be the least sexually dimorphic
permanent teeth. For most teeth, the variation in crown size
can be explained by the additive genetic and unique
environmental variation. Environmental influences on tooth
crown size can be substantial, but heritability of most crown
sizes is moderate to high.[10]
Arte et al. also found strong genetic relationships between
hypodontia and tooth anomalies such as ectopic maxillary
canines.[11] They studied 11 people (aged10-36 years) with
hypodontia of 1 to 6 permanent teeth and their relatives,
totaling 214 Finnish individuals. The mean number of tooth
agenesis in the test group was 2.3 and 1.7 in their families
indicating a strong genetic link. Data was collected
retrospectively through dental history and radiographs and
the controls were established with published population
prevalence. Results showed 4.5-4.9 times the occurrence of
hypodontia in first and second degree relatives (39% and 36%
respectively). They also found an equal maternal and paternal
inheritance. Rotated premolars and ectopic permanent
canines were seen more frequently in patients with
hypodontia and their families; 2 to 3 times that seen in the
general population. The authors concluded that incisor-
premolar hypodontia is associated with many dental
anomalies and is transmitted in an autosomal dominant
manner.[11]
Since the development of genetic mapping, Brook et al.
have shown that some genes are implicated in the agenesis of
teeth, including PAX9, MSX1 and AXIN2. The PAX9 gene is
on chromosome 14 with a controlling factor for dental
development and mutations related to missing teeth.[6,12]
Brook et al. measured the tooth sizes on maxillary and
mandibular dental casts in the test group, 10 people with a
known PAX9 mutation in one family and 10 people in a
control group matched for sex, age and ethnicity, who were
not related to the test group and did not have the PAX9
mutation. Differences in the test group with the mutation and
hypodontia were found; these teeth were significantly smaller
than controls. Canines and first molars were least affected in
the test group. This contradicts Bailit’s theory that genetics
mostly affects the first tooth in each group: the central incisor,
canine, first premolar and molar.17 Brook et al. found that
the second tooth in each group was more affected by the
3. International Journal of Public Health Research 2015; X(X): XX-XX 3
PAX9 mutation. The study concluded that the PAX9 mutation
not only decreased tooth number, but also tooth size
throughout the dentition.[12]
Hypodontia (excluding the third molar) is relatively
common findings in different populations. Its frequency
varies from 2.3 to 8% (5, 13). Maxillary lateral incisors were
the second most commonly absent teeth as reported by
several authors (Claton, 1956 (2); Glenn 1964 (3); Ingervall
wt al., 1972 (4); Wisth et al., 1974 (5); Rolling, 1980(6)).
Muller et al/, 1970 (7), found that in those people with
missing one tooth, the maxillary lateral incisors are
congenitally absent in 46.4 % of U.S.A. subjects.
Magnusson TE., 1977 (8), found that agenesis of maxillary
lateral incisor was present in 18% after examining 1116
Icelandic students.[13,14,15]
In Saudi Arabia, the prevalence of hypodontia and peg-
shaped maxillary lateral incisors were studied by Al-Emran et
al. 1990 , in 500 Saudi Arabia male students within the age
range 13-14 years, he reported that agenesis of maxillary
lateral incisor was present 0.6%. Whereas, deviation from
normal dental morphology (peg-shaped) maxillary lateral
incisor was observed in 4% of the sample.[16]
Salama and Abdel-Megid, 1994 , conducted a study on the
prevalence of agenesis and peg-shaped maxillary lateral
incisors in 1300 Saudi Arabia male students. They found that
agenesis of maxillary lateral incisor was present in 9 %. Peg-
shaped maxillary lateral incisor was found in 0.7 % of the
total sample size.[17]
Both of the previous studies were done in the Central
Region, (Riyadh city), and further studies in the eastern
region are needed to confirm their findings m
The purpose of this investigation is to determine the
prevalence of congenital absence (agenesis) maxillary lateral
incisor among Arabs population in Israel. And to compare the
data with other similar studies.
2. Materials and Methods
We conducted a retrospective study of all
orthopantomograms (OPGs) of 2200 Palestinian patients
aged 12 to 39,5 years (Mean age #16,2), taken between 2006
and 2013, which were available in the Center for
Dentistry,Research&Aesthetic ,Jatt,Almothalath,Israel.
Ambiguous OPGs of subjects with no proper record of date
of birth and poor quality image were excluded.
All students attending on the day of examination were
examined. Inclusion criteria were as follows:
1.Palestinian Arabian origin.
2. No pervious history of maxillary lateral incisor
extraction
3. No pervious restorative reshaping or crowning of the
maxillary lateral incisors
4. No pervious orthodontic treatment.
The clinical examination was carried out in the our dental
center in good daylight using disposable tongue depressors to
retract the lips if needed during anterior segment examination.
The patient were questioned about possible earlier
extractions and those with positive history were excluded
from the study. If the lateral incisors were missing and the
patient has no positive history of pervious extraction, the
patient was referred to the our center for diagnostic
panoramic radiograph to be taken.
Agenesis of lateral incisor was determined from
radiograph; patient with impacted maxillary lateral incisors
were also excluded from the study.
a b
Fig. 1a, b.: Unilateral missing lateral Incisor.
a b
Fig. 2a, b.: Bilateral missing lateral Incisors.
4. 4 Muhamad Abu-Hussein et al.: Prevalence of Missing Lateral Incisor Agenesis in an Orthodontic Arabs Population in Israel(Arab48)
3. Results
Table 1. Gender distribution of patients treated.
Treated (Orth.) N=2200 %
Female 1354 61.60%
Male 846 38.40%
Of the 2200 patients, 846 were males (38,4%) and 1354
were females (61,6%) (Table 1)(Fig.3); the mean age was
16,2years, ranging from 10,2 to 39,5 years. (Table 2).
Table 2. Means age Hypodontia.
Age, Impacted Min Max Avg
10.2 39.5 16.2
Of the 2200 subjects (1354 females- [61,6%], 846males -
[38,4%]) exa-mined, 24(13 females 54,[17%], 11 males) were
found to have MLI agenesis. Thus, the prevalence of MLI
agenesis in our sample was 2,6%, and 0,6%per cent of the fe-
males and 0,5% of the males were affected.
Fig. 3. Gender distribution of patients treated.
Table 3. Patients with Missing Lateral Teeth N=24 .
Missing Lateral N=24 %Missing
Female 13 54.17%
Male 11 45.83%
Fig. 4. Patients with Missing Lateral Teeth.
Table (4) presents, the percentage distribution of normal,
maxillary lateral incisor values among the 2200 patients .
2176 (98,90%) of the sample had normal lateral incisors, 24
(1,09%) had congenital absence (agenesis) maxillary lateral
incisors.
Table 4. Number of Persons Having Missing Lateral Incisors.
Female Male Total
Missing lateral
incisors
13 11 24
Normal lateral incisors 1341 835 2176
Total 1354 846 2200
Table 5. Number OF Examinees with Unilaterally and Bilaterally Missing
Lateral Incisors.
Female Male
Tooth n
%
(N=57)
%
(N=2200)
n
%
(N=57)
%
(N=2200)
12 3 5.26 0.14 2 3.51 0.09
22 3 5.26 0.14 2 3.51 0.09
12 &
22
7 12.28 0.32 7 12.28 0.32
Total 13 22.8 0.6 11 19.3 0.5
Bilateral agenesis of MLI occurred in 14 subjects ( 0,64%)
and unilateral agenesis in 10 patients ( 0,45% ). Of those
presenting with unilateral agenesis of the MLI, 6( 60%) were
on the right side and 4 (40%) on the left side. No gender
difference was observed in the side-to-side distribution of
MLI agenesis (p > 0.05).
4. Discussion
The number of patients seeking orthodontic treatment in
Arabs population in Israel has increased markedly during
recent years. Therefore it is important to have relevant
epidemiological data on different types of malocclusion in
order to estimate the total need for treatment.
In the present study, analysis of a large sample was done in
order to obtain a clear and valid picture of the distribution
pattern of congenital absence (agenesis) of maxillary lateral
incisor in the Arabs population in Israel.
Investigators in other populations (United State, German,
Iceland, and Swedish populations) reported also different
prevalence pattern of agenesis and peg-shaped maxillary
lateral incis ors. This indicates that differences do exist
between various populations. The most likely expansion is
the differences in racial and ethnic origin.
Sofaer et al. in 1971 provided one theory on tooth size and
agenesis. He measured the teeth of 17,000 high school
students in Hawaii ranging in age from 11-
20 years, some with agenesis of the maxillary lateral
incisor and some with a fullcomplement of teeth. Teeth were
measured intra-orally with oral proof of agenesis; no
radiographs were taken of the subjects. Peg laterals were
associated with a smaller than normal central incisor adjacent
to it. A missing lateral incisor tended to have a larger than
normal central incisor adjacent. Central incisors were more
asymmetrical than normal in cases of a missing lateral incisor
and were also slightly, but not significantly, larger than
5. International Journal of Public Health Research 2015; X(X): XX-XX 5
normal when maxillary lateral incisors were bilaterally
missing. Sofaer hypothesized that the size of the lateral
incisor depends on the amount of space the central and
canine have left for it during primordial development. Since
the canine and central incisors develop before the lateral
incisor, he theorized that it must compete with its neighbors
for size. Sofaer believed that inadequate environment, poor
primordium or both may cause this tooth size asymmetry.[18]
In 2001, Basdra et al. investigated a relationship between
Class III and Class II division 1 malocclusions who had not
received orthodontic treatment and congenital tooth
anomalies. [19] They examined 215 total patients with these
malocclusions looking for: maxillary incisor hypodontia,
maxillary canine impaction, transpositions, supernumerary
teeth, and tooth agenesis. The age range of the patients was
7.2-45.8 years, roughly half males and half females. A dental
history and radiographs were used to confirm the tooth
anomalies. While 5.5% of the Class III patients and 1.9% of
the CL II division 1 patients presented with agenesis of their
maxillary lateral incisors, the frequency was not different
from that of the general population. In fact, none of the
anomalies in these two malocclusion groups showed variance
from that in the normal population; results were not
statistically significant[19].
Le Bot’s study found similar results as Baidas and Hashim.
[20] He measured the teeth of 200 French males with
maxillary lateral incisor agenesis confirmed radiographically.
The sum of the bucco-lingual and mesio-distal dimensions of
maxillary teeth in dental arches with the agenesis of a lateral
incisor were shown to be significantly smaller than normal.
Interestingly, dental arches in the test group who experienced
‘peg’ laterals with no agenesis expressed even smaller teeth
than the group with agenesis. Premolars and canines within
the arch showed the greatest reduction in dimensions when
the maxillary lateral was missing; molars were least affected.
Le Bot also noted that 39.6% of the test sample with agenesis
had a missing a third molar compared to 12.4% in the control
group.[20,21]
In contrast to Sofaer, Baidas and Hashim found that
maxillary anterior teeth were smaller than normal in patients
with unilateral or bilateral agenesis of maxillary lateral
incisor.[21] Thirty dental cases were measured, 12 had a
missing lateral incisor unilaterally, 18 had missing lateral
incisors bilaterally. However, the test population race was not
disclosed and male and female measurements were analyzed
together.The authors used Bolton’s analysis4,8 and Wheeler’s
index37 to evaluate anterior maxillary and mandibular tooth
size ratios. The Bolton Index ratios were larger forpatients
with bilateral or unilateral agenesis of a maxillary lateral
incisor (79.1% and 81.7% respectively with the norm of
77.2%); thus demonstrating lack of maxillary tooth structure.
The reliability of Bolton ratios on racially unknown study
population should be questioned, mainly because Bolton
ratios have been shown to best apply toCaucasian
females.[22]
In 2007, Othman and Harradine studied tooth size
discrepancies in an orthodontic population to determine how
frequently they occur, the amount of discrepancy that is
clinically significant and if these discrepancies can be
visually evaluated without measurement (recommended by
Bosio39 and Proffit27). [23]Their population did not contain
agenesis, but complete, permanent dentitions. They measured
the mesio-distal widths of teeth on 150 (96 female, 54 male)
pretreatment casts from Caucasian patients and used the
Bolton Analysis4 to calculate tooth size discrepancies.
Othman and Harradine found that in this orthodontic
population, 17.4% of people had anterior ratios and 5.4% had
total tooth-width ratios greater than 2 standard deviations
from Bolton’s norms. They believe that Bolton’s selection
criteria may have skewed his results because he chose his
sample based on ‘excellent occlusions’ , which is not typical
for an orthodontic practice. The authors also determined that
2mm of tooth size discrepancy within an arch (1mm per side)
is considered clinically significant, compared to other
literature stating a discrepancy of 1.5mm per ach is clinically
significant.[24]They also concluded that visualization of a
tooth size discrepancy by comparing the size of the maxillary
lateral incisor to the size of the mandibular lateral incisor is
not an accurate method of evaluating tooth
size discrepancies. Thirty percent of teeth visually
examined this way were deemednot to have a discrepancy
even though measurements showed they did have a
significant tooth size deficiency.
Many other studies, we found a significantly higher
prevalence of MLI agenesis in females. Our findings that
both MLIs were just as likely to be missing as one incisor,
and when one lateral incisor was missing it was likely to be
on the right side, agree with previous researches . However,
we urge caution when interpreting these results because of
the methodological shortcomings in retrospective studies of
orthodontic populations.[25]
Previous studies have shown that tooth age-nesis may be
related to other dental anomalies such as microdontia or peg-
shaped incisors, taurodontism, transposition, supernumerary
tooth, ectopic eruption, retained primary tooth, and ectopic
eruption. However, agenesis of MLI and associated dental
anomalies were limited in the literature. Most of the papers
published about MLI agenesis investigated reduced crown
size or peg shaped form of the contralateral MLI among the
subjects with unilateral absence of this tooth.
Pinho et al. investigated other associated developmentally
absent teeth and supernumerary tooth. Although no
supernumerary tooth was found, they found that 12.8 per cent
of the subjects with MLI agenesis had absence of other teeth
and most frequently observed missing teeth were maxillary
and mandibular premolars. The prevalence of the subjects
with agenesis of other teeth (9.6 per cent), in this study, was
very close to the data reported by Pinho et al. and the
missing teeth were maxillary and mandibular premolars (63.6
per cent) and mandibular central incisors (36.4 per
cent).[26,27,28,29]
Celikoglu et al. [30]reported MLI-canine transposition in
the cases of MLI agenesis and Peck et al. [7] showed
transposition in the mandible. In this study, one subject with
6. 6 Muhamad Abu-Hussein et al.: Prevalence of Missing Lateral Incisor Agenesis in an Orthodontic Arabs Population in Israel(Arab48)
MLI-canine transposition in the same side with MLI agenesis
was observed. Additionally, we found 6 subjects with
dilacerations, 5 with the impaction of maxillary canines, 1
with a supernume-rary tooth, and 1 with a transmigrated
maxillary canine. Supernumerary tooth was an extra
premolar in the same side with the MLI agenesis. In addition,
transmigration and transposition of the maxillary canine were
also in the same side with the MLI agenesis.
In 78.7 per cent of the patients with the agenesis of MLIs,
the space was orthodontically closed, while in the remaining
21.3 per cent the space was orthodontically maintained for
prosthetic replacements and implant placement. The lateral
incisor space was closed in the patients with crowded arches,
while space was maintained in the patients with uncrowded
arches[31]. Since crowding was present in the study group
and implant treatment is deferred until the jaws have stopped
growing to avoid the complications caused by implants , the
space was orthodontically closed in most of the patients.
Robertsson et al. [32] investigated the aesthetics according to
the opinions of the patients, occlusal function, and
periodontal health in subjects with one or two MLI agenesis
who had received either orthodontic space opening or closure
followed by a modern prosthetic replacement for the MLI
agenesis. The authors indicated that orthodontic space
closure produced treatment results that appear to be
reasonably stable, and better accepted by the patients than
prosthetic replacements.
Orthodontic patients do not necessarily reflect the number
of individuals in the population with tooth agenesis, this will
be dependent on the availability of orthodontic treatment and
its uptake in this particular population. However,
retrospective studies rely on good record keeping and
orthodontic patients often have more complete records. Thus,
some reports have shown the prevalence of tooth agenesis in
orthodontic patients.
To summarize the studies presented on tooth size and
agenesis: tooth size discrepancies do exist in combination
with agenesis of a maxillary lateral incisor. Central incisors
adjacent to the missing lateral incisors were larger than
‘normal’ in an early, intra-oral study, whereas other studies
measuring teeth on dental casts showed smaller than average
maxillary anterior teeth when the lateral incisor was missing.
Premolars and canines within the arch with agenesis have
also been shown to be smaller than normal and third molar
agenesis is more common as well.
In an orthodontic population without agenesis, tooth size
discrepancies are fairly
common.
5. Conclusions
i.The prevalence rates for lateral incisor agenesis 1,1%,
respectively, in Arabas populationin Israel.
2. The present study also shows that Arabs population in
Israel had less agenesis maxillary lateral incisors than
Caucasians.
3.The prevalence of missing teeth was more common is
females than males.
4. The prevalence of missing teeth was more bilateral than
unilateral teeth
In the diagnosis of agenesis of maxillary lateral incisors it
is necessary to perform a good clinical examination and
subsequent radiographic confirmation in order to observe not
only the absence itself but also all the anomalies that may be
associated
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