This document discusses various types of maxillofacial prostheses including nasal, auricular, and craniofacial prostheses. It covers topics such as impression techniques, sculpting, processing, retention methods, and the use of implants and magnets for retention. It also discusses the use of prosthetic stents and splints during radiation therapy to help position tissues and protect vital structures.
FABRICATION OF AURICULAR & ORBITAL PROSTHESIS/orthodontic courses by Indian ...Indian dental academy
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Miscellaneous maxillofacial prosthesis/ dental education in indiaIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
A brief presentation about the maxillofacial extra-oral defects, and the prosthesis used for the rehabilitation, as well as steps of fabrication.
Hossam Faisal - TA of Prosthodontics, Future University Egypt
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
This document discusses adhesives used in maxillofacial prosthetics. It describes various types of adhesives including tapes, pastes, liquids, and sprays. Factors that affect adhesive joint strength are also covered such as properties of the adhesive, skin, and environment. Application and removal of prostheses using adhesives is outlined involving cleaning, positioning, and blending the prosthesis. While adhesives provide retention, disadvantages include potential messiness, skin irritation, and unreliable retention for large or complex prostheses.
Implant designs and materials/certified fixed orthodontic courses by Indian d...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Implant supported maxillofacial prosthesis/cosmetic dentistry coursesIndian dental academy
This document discusses maxillofacial prosthodontics and the use of osseointegrated implants to support facial prostheses. It covers the history and development of maxillofacial osseointegration, differences from oral osseointegration, advantages over adhesives, criteria for success, and treatment planning considerations. Key aspects include improved retention and stability of prostheses supported by implants compared to adhesives, as well as increased longevity, comfort, and hygiene. Success rates are generally high but lower for irradiated patients. Careful patient selection and consideration of medical conditions is important.
FABRICATION OF AURICULAR & ORBITAL PROSTHESIS/orthodontic courses by Indian ...Indian dental academy
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Miscellaneous maxillofacial prosthesis/ dental education in indiaIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
A brief presentation about the maxillofacial extra-oral defects, and the prosthesis used for the rehabilitation, as well as steps of fabrication.
Hossam Faisal - TA of Prosthodontics, Future University Egypt
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
This document discusses adhesives used in maxillofacial prosthetics. It describes various types of adhesives including tapes, pastes, liquids, and sprays. Factors that affect adhesive joint strength are also covered such as properties of the adhesive, skin, and environment. Application and removal of prostheses using adhesives is outlined involving cleaning, positioning, and blending the prosthesis. While adhesives provide retention, disadvantages include potential messiness, skin irritation, and unreliable retention for large or complex prostheses.
Implant designs and materials/certified fixed orthodontic courses by Indian d...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Implant supported maxillofacial prosthesis/cosmetic dentistry coursesIndian dental academy
This document discusses maxillofacial prosthodontics and the use of osseointegrated implants to support facial prostheses. It covers the history and development of maxillofacial osseointegration, differences from oral osseointegration, advantages over adhesives, criteria for success, and treatment planning considerations. Key aspects include improved retention and stability of prostheses supported by implants compared to adhesives, as well as increased longevity, comfort, and hygiene. Success rates are generally high but lower for irradiated patients. Careful patient selection and consideration of medical conditions is important.
Facial prosthesis / dental implant courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Implant supported maxillofacial prosthesis./ lingual orthodontics coursesIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
The document discusses extra oral defects and ocular and orbital defects. It describes the classification of ocular defects according to Peyman, Saunders and Goldberg including enucleation, evisceration and exenteration. It also discusses impression techniques for ocular prosthetics including direct impression, impression with stock or custom trays, and the wax scleral blank technique. Complications involving the eye socket such as ptosis, ectropion and contracted sockets are also outlined. The use of buried and non-buried implants as well as craniofacial implants is described.
Retention of maxillofacial prosthesis./cosmetic dentistry courseIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Facial implant and implant retained craniofacial prostheses nnPallawi Sinha
This document discusses implant-retained craniofacial prostheses. It covers the advantages of maxillofacial implants over conventional adhesives for prosthesis retention. It also discusses patient assessment, treatment planning, surgical techniques for implant placement, different types of craniofacial prostheses (auricular, ocular, nasal, midfacial), abutment sites, follow-up care, and a review of literature on the topic. The document focuses on osseointegrated implants as a method for retaining craniofacial prostheses and improving patients' quality of life.
This document provides an overview of maxillofacial prosthetics. It discusses the history of artificial facial reconstruction and the establishment of maxillofacial prosthetics as a branch of dentistry. Maxillofacial prosthetics aims to restore function and esthetics after trauma, surgery, or congenital defects. Prostheses can be intraoral or extraoral and may be immediate, transitional, or definitive depending on the healing process. The document outlines various prosthetic options and techniques for reconstructing parts of the maxilla, mandible, ear, nose, and orbit. It emphasizes a multidisciplinary team approach including surgeons, prosthodontists, and other specialists to optimize patient rehabilitation.
The document discusses the anatomy and function of the ear, diseases that can affect the ear, and treatments for hearing loss. It covers the three main parts of the ear - outer, middle, and inner ear. It describes how sound is transmitted through the ear and processed in the cochlea. The document focuses on different prosthetic devices and implants that can be used to reconstruct parts of the middle ear or restore hearing loss, such as partial or total ossicular replacement prostheses. It also discusses cochlear implants for inner ear deafness.
This document discusses various methods of retention for maxillofacial prosthetics. It begins with a brief history of maxillofacial prosthetics from ancient Egypt to modern times. It then covers different types of anatomic retention including intraoral considerations like support from residual structures and extraoral considerations. The document also discusses various methods of mechanical retention such as cast clasps, attachments, adhesives, and implants that can be used to improve retention of maxillofacial prosthetics.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Retention in maxillo facial prosthesis./cosmetic dentistry courseIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The document discusses surgical and prosthetic techniques for maxillofacial rehabilitation following cancer resection, noting that the goal is to restore both function and cosmesis through a combination of surgery, such as skin grafting, and prosthetics like obturators and implants to replace missing structures of the face, jaw, and oral cavity.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Principles and concepts of designing obturators/ orthodontic seminarsIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
1) Orbital defects should be lined with skin and avoid distortion of surrounding tissues to allow for proper prosthetic restoration.
2) Impressions should capture detail without distorting soft tissues. Digital impressions provide accuracy.
3) Sculpting develops contours to match the opposite eye and restore facial symmetry. Surface texture replicates skin folds.
4) Processing incorporates selected shade and polymerizes silicone. Magnetic retention aids in prosthesis stability and function.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
This document discusses the restoration of ear defects through both surgical and prosthetic means. It begins by outlining favorable alterations that can be made at surgery, such as retaining the tragus and lining defects with skin grafts. It then discusses presurgical consultations, making impressions, sculpting prostheses, and techniques for coloring and finishing them. Methods for restoring partial ear defects are presented, as well as the use of craniofacial implants. Surgical templates, bar designs, and soft tissue considerations for implants are outlined. The document emphasizes producing a natural appearance and stable, long-term restorations.
The document discusses various topics related to maxillofacial prosthodontics including classification of obturators, impression techniques, and construction of different types of obturators. It describes immediate surgical obturators fabricated preoperatively using irreversible hydrocolloid impressions. Treatment obturators are made 7 days postoperatively using alginate impressions. Permanent obturators can be fixed, hinged, or detachable depending on the defect and surrounding tissues. Impression techniques address challenges from limited opening and undercuts.
Maxillofacial prosthesis is a relatively new, but possibly fastest growing branch of dentistry in recent times. It has become essential to thousands of people who had to lead a life of broken self-esteem and with the feeling of being shunned or deemed unattractive because of some distorted facial features.
1. Prosthodontic splints and stents are used during radiation therapy to position and shield tissues, simplify dosimetry calculations, and position radioactive sources.
2. Positioning stents are used to control tongue depression and open the bite, shielding normal tissues from radiation.
3. Shielding is used with electron beams to reduce dose to normal tissues and flatten irregular surfaces.
4. Tissue bolus devices fill irregular spaces with wax, saline, or acrylic resin to create a more homogeneous radiation dose distribution.
Facial prosthesis / dental implant courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Implant supported maxillofacial prosthesis./ lingual orthodontics coursesIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
The document discusses extra oral defects and ocular and orbital defects. It describes the classification of ocular defects according to Peyman, Saunders and Goldberg including enucleation, evisceration and exenteration. It also discusses impression techniques for ocular prosthetics including direct impression, impression with stock or custom trays, and the wax scleral blank technique. Complications involving the eye socket such as ptosis, ectropion and contracted sockets are also outlined. The use of buried and non-buried implants as well as craniofacial implants is described.
Retention of maxillofacial prosthesis./cosmetic dentistry courseIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Facial implant and implant retained craniofacial prostheses nnPallawi Sinha
This document discusses implant-retained craniofacial prostheses. It covers the advantages of maxillofacial implants over conventional adhesives for prosthesis retention. It also discusses patient assessment, treatment planning, surgical techniques for implant placement, different types of craniofacial prostheses (auricular, ocular, nasal, midfacial), abutment sites, follow-up care, and a review of literature on the topic. The document focuses on osseointegrated implants as a method for retaining craniofacial prostheses and improving patients' quality of life.
This document provides an overview of maxillofacial prosthetics. It discusses the history of artificial facial reconstruction and the establishment of maxillofacial prosthetics as a branch of dentistry. Maxillofacial prosthetics aims to restore function and esthetics after trauma, surgery, or congenital defects. Prostheses can be intraoral or extraoral and may be immediate, transitional, or definitive depending on the healing process. The document outlines various prosthetic options and techniques for reconstructing parts of the maxilla, mandible, ear, nose, and orbit. It emphasizes a multidisciplinary team approach including surgeons, prosthodontists, and other specialists to optimize patient rehabilitation.
The document discusses the anatomy and function of the ear, diseases that can affect the ear, and treatments for hearing loss. It covers the three main parts of the ear - outer, middle, and inner ear. It describes how sound is transmitted through the ear and processed in the cochlea. The document focuses on different prosthetic devices and implants that can be used to reconstruct parts of the middle ear or restore hearing loss, such as partial or total ossicular replacement prostheses. It also discusses cochlear implants for inner ear deafness.
This document discusses various methods of retention for maxillofacial prosthetics. It begins with a brief history of maxillofacial prosthetics from ancient Egypt to modern times. It then covers different types of anatomic retention including intraoral considerations like support from residual structures and extraoral considerations. The document also discusses various methods of mechanical retention such as cast clasps, attachments, adhesives, and implants that can be used to improve retention of maxillofacial prosthetics.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Retention in maxillo facial prosthesis./cosmetic dentistry courseIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The document discusses surgical and prosthetic techniques for maxillofacial rehabilitation following cancer resection, noting that the goal is to restore both function and cosmesis through a combination of surgery, such as skin grafting, and prosthetics like obturators and implants to replace missing structures of the face, jaw, and oral cavity.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Principles and concepts of designing obturators/ orthodontic seminarsIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
1) Orbital defects should be lined with skin and avoid distortion of surrounding tissues to allow for proper prosthetic restoration.
2) Impressions should capture detail without distorting soft tissues. Digital impressions provide accuracy.
3) Sculpting develops contours to match the opposite eye and restore facial symmetry. Surface texture replicates skin folds.
4) Processing incorporates selected shade and polymerizes silicone. Magnetic retention aids in prosthesis stability and function.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
This document discusses the restoration of ear defects through both surgical and prosthetic means. It begins by outlining favorable alterations that can be made at surgery, such as retaining the tragus and lining defects with skin grafts. It then discusses presurgical consultations, making impressions, sculpting prostheses, and techniques for coloring and finishing them. Methods for restoring partial ear defects are presented, as well as the use of craniofacial implants. Surgical templates, bar designs, and soft tissue considerations for implants are outlined. The document emphasizes producing a natural appearance and stable, long-term restorations.
The document discusses various topics related to maxillofacial prosthodontics including classification of obturators, impression techniques, and construction of different types of obturators. It describes immediate surgical obturators fabricated preoperatively using irreversible hydrocolloid impressions. Treatment obturators are made 7 days postoperatively using alginate impressions. Permanent obturators can be fixed, hinged, or detachable depending on the defect and surrounding tissues. Impression techniques address challenges from limited opening and undercuts.
Maxillofacial prosthesis is a relatively new, but possibly fastest growing branch of dentistry in recent times. It has become essential to thousands of people who had to lead a life of broken self-esteem and with the feeling of being shunned or deemed unattractive because of some distorted facial features.
1. Prosthodontic splints and stents are used during radiation therapy to position and shield tissues, simplify dosimetry calculations, and position radioactive sources.
2. Positioning stents are used to control tongue depression and open the bite, shielding normal tissues from radiation.
3. Shielding is used with electron beams to reduce dose to normal tissues and flatten irregular surfaces.
4. Tissue bolus devices fill irregular spaces with wax, saline, or acrylic resin to create a more homogeneous radiation dose distribution.
This document discusses maxillofacial prosthetics, which are artificial devices used to replace missing facial or oral structures. It describes various types of maxillofacial defects including cleft lip and palate, acquired defects from surgery or trauma, and extraoral defects. The goals of maxillofacial prosthetics are to preserve remaining structures, reconstruct function, and improve aesthetics. Common materials used include silicone, acrylic, and metals.
Adhesives in maxillofacial prosthesis /orthodontics courses in indiaIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
This document discusses the prosthodontic management of patients who have undergone mandibulectomy surgery. It covers classification of mandibular defects, factors affecting treatment, and different types of prostheses used. Key points include that the location and extent of the defect, remaining teeth/implants, mandibular deviation, mouth opening, and tongue function all impact treatment. Marginal defects have the best prognosis while anterior discontinuity defects are most debilitating. Soft tissue grafts are used for marginal defects while microvascular flaps can reconstruct larger defects.
This document discusses reconstructive techniques for ear defects. It begins with the anatomy and importance of the auricle. Historical techniques are described from 600 BC to modern methods developed in the 1920s. Congenital and acquired ear anomalies are classified. Reconstruction methods include stick-on prosthetics, osseointegrated implants, synthetic frames, and total autologous reconstruction using costal cartilage grafts. The popular Brent and Nagata techniques for microtia repair are explained. Reconstructive options are provided for defects in the upper, middle, and lower thirds of the ear. Local flaps are commonly used and cartilage frameworks are increasingly utilized for partial ear defects.
1. The document discusses the anatomy, embryology, relationships, and reconstruction techniques for the external ear. It describes the cartilage framework, muscles, blood supply, nerves, lymphatic drainage, and embryonic origin of ear structures.
2. Key reconstruction techniques summarized include the Antia-Buch procedure using advancement flaps for marginal defects, interlocking flaps for non-marginal defects, and conchal rotation flaps for upper third defects. Cartilage from the ear or rib is used depending on the size of the defect.
3. The principles of acute management after trauma include cleaning and debridement, then skin closure, grafting, or delayed reconstruction depending on the extent of injury and tissue loss. Composite
Radiation therapy can cause damage to oral mucosa and tissues. It commonly results in mucositis, which initially presents as erythema and develops into oral ulcers. Mucositis severity depends on factors like treatment dose and site of irradiation. While supportive care remains the standard, research focuses on radioprotective agents, anti-inflammatories, growth factors, and mucosal decontamination to reduce mucositis. However, effective preventative or treatment measures have yet to be established.
An abutment is the tooth or portion of a tooth that supports and retains a dental prosthesis. It must withstand the forces normally directed to the missing teeth in addition to its own forces. Better abutment choices are vital teeth or endodontically treated teeth with good seals. The crown-root ratio, root configuration, and periodontal area of potential abutment teeth must be evaluated. Teeth with broader roots, multiple separated roots, and larger periodontal surface areas provide better support.
This document discusses factors to consider when evaluating teeth as potential abutments for fixed partial dentures (FPDs). It defines key terms like abutment and describes the ideal requirements for an abutment tooth, including that it is vital, has adequate coronal structure and healthy surrounding tissues. The document outlines how to assess abutments clinically, with diagnostic casts and radiographs. It discusses many factors that influence abutment selection, like crown length, ratio of crown to root, root configuration, proximity between roots, periodontal health and mobility. It also addresses how span length, arch curvature and other anatomical traits should guide abutment choices to help ensure the FPD's long-term success.
The document discusses roof coverings and insulation for pitched and flat roofs. It describes common materials used for pitched roof coverings like slates, tiles, and underlay. It also discusses installing insulation, ventilation, and waterproof membranes. For flat roofs, it covers sheet membranes, insulation methods to prevent condensation, and common flat roof covering materials.
Abutment & Its Selection In Fixed Partial DentureSelf employed
This document discusses factors to consider when selecting abutment teeth for fixed partial dentures (FPDs). It defines an abutment tooth and outlines how to assess potential abutments, including taking radiographs and evaluating crown morphology, root configuration, crown-to-root ratio, and other anatomical features. Good abutment teeth are vital with adequate bone and root support and crown structure to withstand forces from the FPD. Location, occlusion, tooth structure and root health must be optimized for successful force distribution from the prosthesis.
This document discusses different designs of coronary stents. It begins by providing background on the development of coronary stents and their approval for use. It then describes some of the earliest stent designs, including the Gianturco-Roubin coil stent and the Palmaz-Schatz slotted tube stent. The document goes on to discuss various aspects of stent design that can impact performance, such as the geometric configuration, materials used, coatings, and drug-eluting capabilities. Key design considerations like strut thickness, number of struts, and mechanical properties are also reviewed.
Plastic is a synthetic material made from organic polymers that can be molded while soft and set into a rigid form. It is classified based on its behavior with heat (thermoplastics soften with heat, thermosetting plastics harden permanently), structure (homogeneous or heterogeneous), and properties (rigid, semi-rigid, soft, elastic). Common thermoplastics include polyethylene, PVC, and nylon, while epoxies, phenolics, and polyesters are thermosetting plastics. Plastics are composed of polymers, carbon, oxygen, and other elements, and may include additives like fillers, pigments, plasticizers, and catalysts to modify their properties.
The document summarizes the anatomy of the middle ear, which consists of the tympanic cavity, Eustachian tube, and mastoid air cell system. The tympanic cavity contains the three ossicles (malleus, incus, stapes), two muscles (tensor tympani and stapedius), the chorda tympani nerve, and tympanic plexus. It is further divided into compartments and its walls, contents, and structures like the ossicles, nerves, muscles are described in detail.
Flooring refers to any material applied over a floor structure to provide a walking surface. Common flooring materials include carpet, resilient flooring (e.g. vinyl, linoleum), wood, ceramic tile, stone, terrazzo, and seamless chemical coatings. The choice of flooring material depends on factors like cost, durability, noise insulation, comfort, and maintenance requirements. A subfloor provides structural support for the flooring material and may be finished without additional covering. Common flooring types discussed include carpet, wood, resilient, ceramic tile, marble, brick, glass, rubber, and stone flooring.
Plastics are widely used in building construction and materials. They are used for roofing materials, cladding panels, sound and thermal insulation, decorative laminates, adhesives and sealants, and more. Plastics provide advantages over traditional materials like being lightweight, resistant to rot and weather, and requiring little maintenance. Common plastics used in buildings include polycarbonate, PVC, polystyrene, and foams for insulation. While plastics have advantages, they can also soften at high temperatures or become brittle in cold.
A stent is a small, expandable tube. During a procedure called angioplasty, the stent is inserted into a coronary artery and expanded using a small balloon. A stent is used to open a narrowed or clotted artery.
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Posterior palatal s /certified fixed orthodontic courses by Indian dental aca...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Maxillofacil prosthodontics / dental implant courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Clinical management of edentulous maxillectomy patient / dental coursesIndian dental academy
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
This document discusses preprosthetic management prior to dental prosthesis construction. It covers examining the oral cavity to identify potential problems, improving treatment outcomes. Non-surgical methods include tissue rest, occlusal adjustments, and nutrition/jaw exercises. Surgical methods include correcting conditions limiting prosthesis function and enlarging denture bearing areas through procedures like vestibuloplasty and ridge augmentation. Specific procedures covered are alveoloplasty, tuberosity reduction, frenectomy, tori removal, and managing irritated tissues with conditioners. The goal is preparing tissues for a comfortable, functional prosthesis.
Implants in orthodontics /certified fixed orthodontic courses by Indian dent...Indian dental academy
This document discusses the use of temporary anchorage devices (TADs) such as mini-screws and mini-plates for orthodontic anchorage. It provides information on various TAD systems including the Aarhus Anchorage System, IMTEC Mini Ortho Implants, and Spider Screw Anchorage System. The document discusses TAD placement locations, surgical procedures, orthodontic mechanics, advantages, and potential complications. It emphasizes the importance of treatment planning for anchorage when using TAD-assisted mechanics.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
This document discusses the prosthodontic treatment of edentulous patients who have undergone maxillectomy surgery. It covers prognostic factors, impression techniques, records, occlusion schemes and processing methods for definitive obturator prostheses. The key goals are to restore oral-nasal separation, replace missing dentition and restore function. Prognosis depends on factors like defect size/location, available retention/support areas and the patient's neuromuscular control.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
8.implantology biologic and clinical aspectscertified fixed orthodontic cours...Indian dental academy
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
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Implant surgeries to overcome anatomic difficulties / implant dentistry cour...Indian dental academy
The document discusses various implant surgery techniques to overcome anatomical difficulties, including guided tissue regeneration, ridge augmentation, maxillary sinus lift, inferior alveolar canal lateralization, and mental nerve distalization. It provides details on the procedures, including indications, techniques, materials used, advantages, limitations, and complications. The goal is to restore normal function, comfort, and aesthetics for rehabilitating challenging clinical situations, such as atrophy or injury, using these techniques to place dental implants predictably.
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
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Implant surgeries to overcome anatomic difficulties ii / dental implant cour...Indian dental academy
This document discusses various surgical techniques used to overcome anatomical difficulties for dental implants. It covers guided tissue regeneration, ridge augmentation, maxillary sinus lift, inferior alveolar canal lateralization, and mental nerve distalization. The maxillary sinus lift technique is described in detail, including indications, contraindications, the original method, benefits and potential complications like membrane perforation. Lateralization of the inferior alveolar nerve and distalization of the mental nerve are also summarized. The document provides an overview of these procedures to help restore function and aesthetics for patients with atrophy or injury.
failures of dental implants /certified fixed orthodontic courses by Indian de...Indian dental academy
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Dear Doctor,
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Leader in continuing dental education
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skype:indiandentalacademy
+919248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
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This document discusses dental occlusion concepts and philosophies for complete dentures. It introduces key terms like physiologic occlusion and defines different occlusion schemes like balanced articulation and monoplane articulation. The document discusses advantages and disadvantages of using anatomic versus non-anatomic teeth for complete dentures. It also outlines requirements for maintaining denture stability, such as balanced occlusal contacts and control of horizontal forces. The goal of occlusion for complete dentures is to re-establish the homeostasis of the masticatory system disrupted by edentulism.
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This document discusses dental casting investment materials. It describes the three main types of investments - gypsum bonded, phosphate bonded, and ethyl silicate bonded investments. For gypsum bonded investments specifically, it details their classification, composition including the roles of gypsum, silica, and modifiers, setting time, normal and hygroscopic setting expansion, and thermal expansion. It provides information on how the properties of gypsum bonded investments are affected by their composition. The document serves as a comprehensive overview of dental casting investment materials.
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
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LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPRAHUL
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
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Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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6. Restoration of nasal defects
The vast majority of nasal defects are
Secondary to neoplasm
(Most) partial nasal defects
Surgery
Rehabilitation
Total nasal defects
Prosthetic restoration
Para amount important ----patient desires
www.indiandentalacademy.com
7. If the defects is going to be temporarily /permanently
restored with a prosthesis
Presurgical consultation with patients & surgeon is
Necessary
In partial rhinectomy defects Surgeon may advice restored
Temporarily with the prosthesis
Surgical reconstruction only after
the suitable observation has elapsed
Covering the defect with a local flap may delay the recovery of
Recurrent tumor
www.indiandentalacademy.com
8. Total rhinectomy cases
Prosthetic restoration is preferable
The prosthesis is to be constructed , the surgeon should be advised
To remove the nasal bone & rest of the bone
Failure to do so makes it virtually impossible to
Fashion a prosthesis that duplicates presurgical
Nasal prosthesis
www.indiandentalacademy.com
10. Ideally a flat / concave surface is best suited to receive
a prosthesis .
The patient should be informed regarding benefits & limitation
of prosthesis
patients expectation --------- realistic
Psychological evaluations & consultations should begin prior to
The resection
Prior to surgery , facial impression and photographs should
be obtained.
www.indiandentalacademy.com
11. Full facial impression are preferred
Bec’z they provide useful
information for the clinician to
Fabricate the post surgical
Nasal prosthesis .
Undesirable undercuts
Blocked out
Petrolatum gauze
www.indiandentalacademy.com
12. Temporary nasal
prosthesis
Approx 3 to 4 weeks following surgery
Early restoration is appreciated by patients
Heat polymerizing MMA preferred material .
Retention Medical grade adhesive
www.indiandentalacademy.com
13. Definitive
nasal
prosthesis
Effectiveness depends upon the nature &
extent of the prosthesis
Flat defects in which the nasolabial fold remain
are the easiest to restore prosthetically .
Defects of the surgical margins that extend beyond
The nasal area
Difficult to restore
Bec’z of exposure of the lines of juncture .
www.indiandentalacademy.com
14. Margins that extend onto the
Upper lip
Camouflaged by facial hair
Extend laterally beyond the eye Glasses will always apparent
In most patients the residual tissue bed is highly mobile , particularly
When next to the alae / columella
Difficult to account for this mobility with
impression procedure
Prostheses of highly flexible material is advised
more comfort to the patient
www.indiandentalacademy.com
15. Defect extend
onto the lip
Lines of juncture in this
Area was covered
With a mustache
www.indiandentalacademy.com
17. Impression techniques in
Definitive nasal prosthesis
As in orbital defects , postural changes may result in
distortions of the tissue bed .
For master impression ----patient should be in
upright position
Elastomeric impression materials ideal for this task
A facial moulage is made , using the preliminary cast
a master impression tray is fabricated confined
to the defect
www.indiandentalacademy.com
18. Sculpting
To be effective nasal prosthesis must reproduce the contour & texture of
The resected nose .
Another imp factor ----------placement & camouflage of the lines of juncture .
In total rhinectomy defect Only small portion of the lines of juncture
Are apparent with a properly sculpted
Nose .
If presurgical cast is not available
Clay / wax should be adapted to the
defect & basic contours are completed .
Reference Facial photographs
Family members .
www.indiandentalacademy.com
19. The alae should be located in their appropriate position in relationship
To the nasolabial folds.
By tucking a portion of the alae into the nasolabial fold these margins
Can readily be made inconspicuous .
Care should be taken not to make the nose too wide in the alar region
Interalar distance > Medial inner canthus distance
Nares should be symmetry & constient with presurgical contours
www.indiandentalacademy.com
20. Small segments of lines of
Juncture is visible .most are
Hidden by eye glasses &
tucked into the
Skin crease & folds
Nares of the
Prostheses
Symmetry
www.indiandentalacademy.com
21. C
O
L
U
M
E
L
L
a
Skin
Eye glass frame -----------improve the appearance of the patients
Always try to place the superior & lateral margins beneath the
Frame.
Reproduction of surface texture is important .
www.indiandentalacademy.com
22. Processing
Two piece molds are adequate
basic shade -----closely match the lightest area of coloration in the
local area
basic shade too dark ---extrinsic coloration
www.indiandentalacademy.com
23. Delivery & retention
Inner surface ---hollowed
retention -----medical grade adhesives
initial adjustments
follow –up schedule constient with life of the prostheses
www.indiandentalacademy.com
24. • For a nasal defect, the anterior surface of the maxilla just
inferior to the nasal cavity offers sufficient thickness of bone
and an optimal position for 4 mm implants.
• Longer implants, 6 mm or greater, are possible in this area.
• A split-thickness skin graft is needed on the sides of the defect
to provide a firm nonmovable foundation for the nasal
prosthesis.
Retention in nasal prostheses
www.indiandentalacademy.com
25. The septal cartilage must be surgically reduced anteriorly and will
reduce the mobility of the tissue bed under the prosthesis and
minimize the stress on the implants.
will provide room for the prosthesis to engage the lateral
walls of the defect and increase the stability of the prosthesis
• A minimum of two implants are required, positioned in each lateral
rounded nasal eminence and the abutments are connected by a bar .
www.indiandentalacademy.com
26. The bar can be extended superiorly 10 to 15 mm from the abutments for
better distribution of retention for the prosthesis.
An acrylic resin section is constructed with the prosthesis to house the
retentive elements. Retentive clips or magnets can be used
www.indiandentalacademy.com
27. Partial nasal prostheses
More of the lines of juncture between prostheses & adjacent margins
will be exposed
Margins –feathered & colored
Acceptable result
www.indiandentalacademy.com
28. Restoration of auricular defects
Defects secondary to congenital malformations , trauma …
Pre operative consultation Extremely valuable
Feathering of the margins & the incorporation of appropriate surface detail .
If surgical reconstructed of the auricle is not contemplated
Entire ear should be removed ---leaving a flat tissue bed
& lined with scalp flap ----making it ideal base .
The tragus should be retained
Bec’z this structure is less obvious anterior line of juncture bet the
Prostheses & the skin .
www.indiandentalacademy.com
29. Residual tissue tag
No retentive value
Prevent sculpture & positioning of
of the prostheses ear .
Temporary auricular prostheses
In most patient tissue bed is organized sufficiently 3 weeks after surgery
fabrication ----heat polymerization of acrylic resin ---periodic adjustment
& relining
www.indiandentalacademy.com
30. Definitive Auricular prostheses
Impressions Unlike orbital defects ,tissue beds in the
auricular area are not displaceable ,
Distortions do not results from postural
Changes
Impression can be obtained pt lying on his side
In a supine position .
Condylar movements closely examined ,
Results in
Tissue bed mobility
www.indiandentalacademy.com
31. Tissue bed mobility
Can affect the
Margin placement ,
Tissue coverage ,
Retention of the prosthesis .
Impression materials –reversible hydrocolloid,
rubber base impression material.
www.indiandentalacademy.com
32. Auricular prosthesis
Impression of the
Defective side
Patient
Position
Defective ear
facing up
External auditory
Meatus ----blocked with wet gauze .
Impression mat
reversible hydrocolloid
Paper clips –reinforcement ,
Plaster Paris –backing .
Impression of the
Nature side
www.indiandentalacademy.com
33. Sculpting
If presurgical cast is available it is reproduced in wax &
compared to the remaining ear
Appropriate changes are made in the basic contours & the wax ear is positioned
& adapted to the defect
To achieve symmetry in all planes with the opposite side
www.indiandentalacademy.com
34. Preoperative cast
Not available
Sculpting
Beginning Donor technique
Time consuming
difficult task
Dividing the cast of the ear
Into equal sections
Contours can be easily verified
Selection ;
Person with ear contours closely
Mimic those of the patient
www.indiandentalacademy.com
35. Orientation lines for positioning of auricular prostheses
Vertical line
Above the helix –
EAM—
LOBE
Horizontal line
Helix ---
EAM—
TRAGUS (beyond )
Defect ear
www.indiandentalacademy.com
38. LAND MARK LOCATION OF THE LAND MARKS
Superaurale (sa) Highest point on the free margin of the auricle
Subaurale (sba) Lowest point on the free margin of the earlobe
Preaurale (pra) Most anterior point of the ear located just in
front Of the helix attachment
Postaurale (pa) Most posterior point on the free margin of the
ear
Otobasion Superius (obs) Point of attachment of the helix in the temporal
region; determines the upper border of the ear
Insertion
Otobasion inferious (obi ) Point of attachment of the ear lobe to the cheek;
determines the lower border of the ear
insertion
www.indiandentalacademy.com
41. Entire surface must be stippled to match the skin texture of the patients
proper stippling is important
Without it texture of the
adjacent skin can never be suitably
Matched
External tinting may be very difficult
Provides mechanical retention for the
Extrinisic colorants & lengthens the
Period of service of the prostheses
www.indiandentalacademy.com
42. A residual tragus will serve to camouflage approx 25 % of the
anterior margins .
Processing
The wax ear is invested in a manner to construct a three –part mold
Using flexible materials to remove the
Casting from the mold without tearing
Material
Base shade
Processing
Selection
Determination
Surface characterization
www.indiandentalacademy.com
43. Margins is feathered anteriorly
Side burns nicely
Camouflage
Lines of juncture
www.indiandentalacademy.com
45. Conventional retentive devices
Used in auricular prosthesis retention
Eye glass
Tissue adhesives
Extension of the prostheses into ear canal
www.indiandentalacademy.com
46. • The use of transcutaneous implants in the temporal region
for auricular prostheses has shown to be an effective
reconstruction option .
• The temporal bone has sufficient thickness to accept a 3 or 4
mm implant.
www.indiandentalacademy.com
47. A minimum of two implants are needed, positioned
approximately 18 mm from the center of the external
auditory meatus and 15 mm from each other.
The abutments are joined by a bar constructed in a C-shaped
design to improve the stability and retention of the
prosthesis
• The bar can be extended 10 to 15 mm beyond the
abutments for better distribution of stability and retention.
www.indiandentalacademy.com
48. Recent techniques in
Retention of auricular prosthesis
The use of craniofacial implants for retention of extra oral prostheses
Excellent support & retentive abilities
Use of magnets is advantageous over the bar & clips for maintenance .
use of composite bar secured into the implants by gold screw .
magnets incorporate into the fitting surface of the prostheses
www.indiandentalacademy.com
53. Prosthodontic stents & splints during therapy
Prosthodontic stents & splints may provide significant benefit to
the Radiation therapist by facilitating delivery of therapy to local
areas & thereby limiting post therapy morbidity .
Stents employed to
Protect / displace vital structures ,
Locate diseased tissues in repeatable positions
During treatment , position the beam ,
Carry the radioactive material
dosimetric device to the tumor site ,
usually confined to
The head & neck regions
www.indiandentalacademy.com
54. Positioning stents
Peroral cone positioning devices
Shielding
Recontouring tissues to simplify dosimetry
Positioning radioactive sources
Use of Prosthodontic Splints and Stents During Radiation TherapyUse of Prosthodontic Splints and Stents During Radiation Therapy
www.indiandentalacademy.com
55. Maintaining position
of structures to be
treated
This type of stent is used primarily for
Tongue lesions being treated with external
Radiation .
Many radiation therapists use a cork to
which a tongue blade is taped to confine
The Tongue within the lingual borders
of the mandible
An inferior position of the tongue &
mandible
Therapist to lower the Radiation
field & spare Significant amounts
of parotid glands
www.indiandentalacademy.com
56. An inter occlusal stent is prepared that extends lingually from
Both alveolar ridges with a flat plate of acrylic resin ;
Serves to
Depress the tongue within the lingual borders of the
Body of the mandible .
A hole is made in the anterior segment in which the tip of the tongue
Placed to establish a reproducible positions
Prostheses for the dentulous patients
www.indiandentalacademy.com
57. Extension used to depress theExtension used to depress the
tonguetongue
Tip of the tongue fits in this holeTip of the tongue fits in this hole
COMBINATION OF BITE OPENING & TONGUE POSITIONING
STENT
www.indiandentalacademy.com
58. 25 mm25 mm
FOR EASY INSERTION
SHOULD NOT EXCEED 25 MM
www.indiandentalacademy.com
60. Prostheses for edentulous patients
Requires maxillary & mandibular impressions ,
With the use of an interocclusal record , cast are mounted on the
articulator,
Two thickness of base plate wax ----- mandibular record base to
form the portion of the stent
--depress the tongue
An occlusal index should be incorporate into record bases
If the existing denture is adequate ---duplication of the dentures
should be carried out
www.indiandentalacademy.com
61. Duplicated dentures returned to the mouth , they are lined with tissue
Conditioned material , & tongue is positioned as before .
Some clinician prefer intra oral fabrication of the stent using a direct technique
www.indiandentalacademy.com
63. Removing structures from the radiation field
This type of stent is valuable when treating lesions involving the mandibular
alveolus, buccal mucosa, and posterolateral border of the tongue.
The stent separates the mandible from the maxilla, thus sparing the maxilla
from the effects of irradiation. In addition, opening of the mandible often lowers
the field sufficiently to eliminate much of the parotid gland from the radiation
field.
This stent is constructed in a fashion similar to the stent used to depress the
tongue vertically.
The vertical opening should allow maximum separation of the maxilla and
mandible within the limits of comfort.
www.indiandentalacademy.com
64. Removing structures from radiation field
25 mm25 mm
FOR EASY INSERTION
SHOULD NOT EXCEED 25 MM
www.indiandentalacademy.com
65. Large one-piece stents are often difficult to insert, particularly when the
patient begins developing radiation mucositis and trismus.
A two- or three-piece stent may be inserted and removed more easily and
Therefore is more likely to be used by the patient and radiotherapist.
www.indiandentalacademy.com
66. Some superficial oral squamous cell carcinomas in
accessible regions, such as the anterior floor of the
mouth and the hard and soft palate, often may be
treated with the use of a peroral cone.
The obvious advantage of such an approach is
that structures such as the mandible and salivary
glands are spared from the effects of radiation.
Such stents are usable in both dentulous and
edentulous patients and assure repeatable
positioning of the peroral cone during therapy
Positioning peroral
cones
www.indiandentalacademy.com
67. For an edentulous patient, mandibular and
maxillary record bases are fabricated. The actual
peroral cone or a cylinder of the same diameter as
the Cone, is used to form an acrylic resin ring 5 to 6
cm long.
Tinfoil (O.OOl-inch) is wrapped around the cone to
ensure its separation from the auto-polymerizing
methyl methacrylate that is used to form the ring.
Fabrication procedure
Of peroral cone
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69. IndicationsIndications
Small localized, accessible, superficial lesions of the oralSmall localized, accessible, superficial lesions of the oral
tongue, floor of the mouth or soft palatetongue, floor of the mouth or soft palate
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71. With the radiation therapist present, the acrylic resin
cylinder is attached to the maxillary record base with dental
modeling plastic, and the acrylic resin cone is centered
over the lesion.
This task is most easily performed in the presence of the
patient, but the cast may be used on occasion where the
lesion is easily accessible and visualized
If the dorsum of the tongue protrudes into the end of the
cone, a wax extension may be attached to deflect the
tongue.
Using a beveled cone will usually serve same purpose.
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72. Shielding
This type of stent is only amenable for use with electron beam therapy.
Studies have shown (Wallace, 1971) that a 1 cm thickness of Cerrobend*, a low-fusing
alloy, will prevent transmission of 95% of the electron beam from an
18 MeV machine.
When such radiation sources are employed, important structures can be shielded by the
placement of a stent.
Lesions of the buccal mucosa, skin, and alveolar ridge may therefore be treated, and
effective shields may be fabricated to protect the tongue and the opposite side of the
mandible.
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73. When obtaining the mandibular impression, dental modeling compound is
used to displace the tongue away from the tray on the side for which the
stent is to be fitted.
If the tongue is not displaced at that time, the mandibular cast must be
trimmed
1 cm space is created between the tongue and the alevolar ridge.
Three or four strips of base plate wax are softened and placed between
the teeth, and the instrument is closed to form an occlusal index .
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75. Fabrication procedure
(Shielding )
A wax rim 1 to 1 ½ cm thick is prepared to fit into the
reduction of the cast .
Softened wax is placed inside the cast & the instrument
is closed so that a ring outline form can be molded
Lingual ext of wax should be hollowed
to create a cavity 1 cm thick .
Processed by ---MMA
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76. Lead is not suitable material for shielding
Cerrobend alloy as effective as lead
in preventing the passage of an electron beam .
Pouring the stent
around the corner
Block out with clay
Back scatter prevented by -----Auto polymerizing MMA resin
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79. Recontouring tissues to simplify dosimetry
This type of stent is advantageous when treating skin lesions associated with
the upper and lower lips.
When the therapist adjusts the beam for the midline, the dosage delivered will
be less at the corners of the mouth because of the convex curvature of the lips
and face in this region.
A stent can be employed to flatten the lip and corner of the mouth, thereby
placing the entire lip in the same plane. Such stents often are combined with a
shield.
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80. Positioning radio active
Source
Selected superficial oral lesions effectively treated by
Placement of prescribed distance from
the radiation source .
For treament of buccal / palatal
Lesion ----placement of radioactive source in a
maxillary trial denture itself .
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82. Positioning radioactive source by after loading
These stents are similar to those that carry a live source, except that
the radioactive source is placed in the stent after the stent is secured
in its desired position.
Therefore, undue contamination of the clinician is avoided.
This prosthesis is useful primarily in treatment of accessible
superficial lesions.
The stent is fabricated in much the same fashion as radiation carriers
except that Polyethylene Tubing is placed a prescribed distance from
the tumor .
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84. Lesions of the retromolar trigone, buccal mucosa, and tongue
predispose to cheek and tongue biting.
Mucositis and edema during radiation therapy may accentuate this
problem.
A stent can easily be fashioned to displace the tongue and/or
buccal mucosa and help alleviate this problem.
This stent overlays the teeth and may be fashioned of mouth
guard material* on dental stone casts.
Prevention of tongue & cheek biting
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85. In some situations a fluoride carrier can serve the same
purpose.
This stent prevents large metal restorations from
directly contacting oral mucous membranes and,
therefore, prevents localized severe radiation mucositis
secondary to backscatter.
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86. Individually constructed vaginal carriers for
intracavitary therapy using either iridium 192
or radium in specific patients with
carcinoma of the vagina, recurrent
endometrial carcinoma of the vaginal vault,
and carcinoma of the cervix with a narrow
vaginal vault have recently gained favor.
Vaginal carriers
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87. Cranial implants
Etiology of cranial defects
During repair of compound skull fracture
Bone flap reimplanted during elective craniotomy
become infected .
Excision of osteomas
surgically planned external decompression craniotomies .
congential malformation
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88. Indication for cranioplasty
Disfigurement & mechanical
Vulnerability
Small defects
2-3 cm
Location ;
Above the orbital rim ,
Nasion
Cosmetic reasons
Repair for
Large defects
8-10 cm
POJunction
Brain protection
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89. Most cranial defects some variable
Proportion of
Cosmetic Mechanical
Aspects
Decision regarding
Cranioplasty must be influenced by
Age Prognosis Activity level
Specific condition
Of the scalp
Poor candidates for surgery
External prostheses fabricated as an integral part of the wig
Cosmesis Protection
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91. Immediate repair of the cranial defects is not recommended
Bec’z of overt / latent infection
Cranioplasty delayed for ---6 -12 months.
Interim protection
External prostheses
Ideally even in the absence of infectious complication
2-3 mon
Required for proper organization & revascularization of flaps
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92. Methods of cranioplasty
Two basic methods
Osteoplastic
Reconstruction
Restoration with
alloplastic material
Autogenous bone graft
Radiodensity
It’s a viable part of the host tissue
psychological benefits
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93. Autogenous bone graft
Radiodensity
It’s a viable part
of the host tissue
psychological benefits
Possible absortion&
Loss of contour
availability of material
diff in cosmetic
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94. Composite autogenous
Graft
To close small through &
Through defects
Free autogenous graft -----------rib / iliac crest
Ribs are most commonly used
Bec’z availability ,retrievability ,
Less defomorability
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95. More recently Habal et al ---used a polyurethane terephthalate to restore the
Cranial defects
Alloplastic implants
Metals –
Tantalum
Inert & malleable ,
.015 inch perforated sheets ,
The implant inlayed into ledge created
Removing a thickness of the outer table of
Adjacent skull equivalent to the
thickness of the tantalum .
Removal of the contamination by –Nitric acid
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97. Titanium
Strong ,
can be strain hardened
radiodensity
.61 mm thick
Tissue acceptability of the implant is enhanced
by anodizing
80%
H3 po4
10%
H2 so4
10%
H2o
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99. Principle advantages of the metals
Malleable ---enables the clinician to shape them to any configuration .
require one incision
readily available .
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100. Autopolymerizing
MMA
Radiolucent
Readily available in sterilized premeasured
Packets of monomer & polymer .
Poor thermal & electrical conductivity .
Mixing a polymer & monomer in polyethylene
Bag & apply the bag on the defect
Prevents monomer contamination ‘
Easy handling
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101. Some clinicians prefer numerous perforation into the prostheses
Maintain fibrous connective tissue
Proliferation
For stability
Fluid may accumulate beneath implant
Can pass to the outer into
Subgaleal space
Can cause tissue reaction
monomer toxicity
difficulty in contouring
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102. Heat polymerizing MMA
IMPRESSION ---- defective part with hydrocolloid
Large cranial defects smaller defects
Scalp –complete shaving
Shaved border of 5cm around the
Bone margins is necessary
When possible clinician should attempt to palpate & mark the margins of the
inner table of bone
Locating the inner table aids in determining the angle necessary for
Contouring the cast to form a margin that will fit .
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105. Impression techniques
Patient position ------upright
Material –reversible hydrocolloid
Thickness of impression ---5 cm
Silicone ---best material for impression Viscosity
Indelible pencil marking
more clearly delineated in the
Impression
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107. Prior to preparation
Of the cast
Consultation with
Neuro surgeon
Design of the cranial implant
Inlay the implant into the defect
Remove the outer table adjacent to the defect
Forming a ledge into which implant is fitted
Controversies
Create a thin lip that rests on the unaltered
Outer table around the margins
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111. Other modification
Combination of autopolymerizing resin
+
stainless steel mesh
Suitable in children's
with thin cranium
Polyethylene
some Properties similar to MMA
Gas sterilization .
Silicone
Tissue compatability +flexiblity
Medical grade silicone
In 3 forms
Blocks –carved to desired
shape
Heat vulcanization form
Room vulcanization form
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112. Conclusion
There are many individual presentation&
varying challenges in supplying patients with prostheses
for maxillofacial defects & the restorative dentist
has to be imaginative & innovative .
As for any other successful treatment , the important
Feature is to be aware of the principles & to stick with them
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113. References
( Books)
Text book of maxillofacial
prosthesis
VAROUJAN CHALIAN
Text book of maxillofacial
Prosthetics
WILLIAM R. LANEY
Maxillofacial
Rehabilitation
Beumer
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