This document discusses the use of radiography in endodontics. It begins with a brief history of dental radiography and then covers topics like how to obtain good radiographs, relevant findings for endodontists, different types of radiographs used, and techniques for intraoral periapical radiographs. The document emphasizes the importance of radiographs for diagnosing issues, determining working lengths, evaluating treatment outcomes, and providing follow-up assessments. Both advantages and disadvantages of radiographs are outlined. Various anatomical landmarks are also identified on sample radiographs.
Radiographs are essential for endodontic diagnosis, treatment, and follow-up. The document outlines the importance and limitations of various radiographic techniques used in endodontics. It discusses radiographic interpretation of normal and abnormal findings, differential diagnosis of lesions, and new technologies like digital radiography and cone beam computed tomography. Radiographic sequence and special techniques like paralleling, bisecting, and cone shift methods are also covered to optimize imaging quality and diagnostic value.
Restoration of endodontically treated teethNivedha Tina
This document discusses various methods for restoring endodontically treated teeth. It covers the history of restoring pulpless teeth dating back to 1747. Key factors in selecting a restorative approach include the amount of residual root and crown structure remaining as well as the tooth's function and position. Methods discussed include direct composite restorations, indirect restorations, fiber posts, cast posts, and full crowns. The document also addresses the vulnerability of root filled teeth to fracture and emphasizes the importance of preserving tooth structure.
1. The document discusses electronic apex locators (EALs), which are devices used to determine the working length of a root canal without radiography.
2. It describes the six generations of EALs, from first-generation resistance-based devices to sixth-generation adaptive apex locators. Key EAL models are provided for each generation.
3. The mechanisms of EALs are explained, noting they measure changes in resistance or impedance as a file tip approaches the apex. Accuracy and limitations of each generation are summarized.
This document discusses the use of lasers in endodontics. It begins with a brief history of lasers, describing their development from Einstein's work in the early 1900s to their first use in dentistry in the 1970s. It then covers laser physics and components, different types of lasers including wavelengths used in dentistry, and laser tissue interactions. The main body discusses several clinical applications of lasers in endodontics such as pulp testing, pulp capping, pulpotomy, root canal disinfection and shaping, and endosurgery. Lasers can provide benefits like reduced need for anesthesia, hemostasis, and less collateral damage compared to other tools. Training is required and no single laser can perform all
This document discusses methods for determining the working length in root canals. It defines key terms like working length, cementodentinal junction, and apical constriction. It describes the significance of accurately determining working length and consequences of being over or under extended. Both radiographic and non-radiographic methods are outlined, including their advantages and limitations. The document concludes that no single method is entirely satisfactory and that a combination of methods should be used to accurately determine working length.
This document discusses endodontic retreatment. It defines retreatment as removing root canal filling materials from a tooth to clean, shape, and re-obturate the canals. Reasons for retreatment include persistent or reinroduced intraradicular microorganisms, extraradicular infection, foreign body reaction, or true cysts. Evaluation involves clinical examination, radiographs, and assessing for symptoms like pain, swelling or sinus tracts. Success is defined as resolution of symptoms and periapical radiolucency, while failure is persistence or worsening of these signs.
This document provides an overview of working length determination in endodontics. It discusses the historical perspectives on working length, important definitions like working length and anatomical structures at the root apex. Methods of determining working length are also covered, including both radiographic and non-radiographic techniques. Factors that influence working length like root canal anatomy and methods to prevent loss of working length are described. The importance of accurately determining working length for treatment success is emphasized.
Veneers are a conservative treatment to improve the appearance of teeth. They involve bonding thin facings of tooth-colored material to the front of teeth. Veneers can be made of composite resin, porcelain, or other ceramic materials. They are either bonded directly during a single appointment or indirectly with impressions taken and veneers fabricated by a dental laboratory over two appointments. Veneers can repair damage, close gaps, change the shape or length of teeth, or improve discoloration while minimizing the removal of tooth structure. The choice of material and technique depends on the specific needs and preferences of the patient.
Radiographs are essential for endodontic diagnosis, treatment, and follow-up. The document outlines the importance and limitations of various radiographic techniques used in endodontics. It discusses radiographic interpretation of normal and abnormal findings, differential diagnosis of lesions, and new technologies like digital radiography and cone beam computed tomography. Radiographic sequence and special techniques like paralleling, bisecting, and cone shift methods are also covered to optimize imaging quality and diagnostic value.
Restoration of endodontically treated teethNivedha Tina
This document discusses various methods for restoring endodontically treated teeth. It covers the history of restoring pulpless teeth dating back to 1747. Key factors in selecting a restorative approach include the amount of residual root and crown structure remaining as well as the tooth's function and position. Methods discussed include direct composite restorations, indirect restorations, fiber posts, cast posts, and full crowns. The document also addresses the vulnerability of root filled teeth to fracture and emphasizes the importance of preserving tooth structure.
1. The document discusses electronic apex locators (EALs), which are devices used to determine the working length of a root canal without radiography.
2. It describes the six generations of EALs, from first-generation resistance-based devices to sixth-generation adaptive apex locators. Key EAL models are provided for each generation.
3. The mechanisms of EALs are explained, noting they measure changes in resistance or impedance as a file tip approaches the apex. Accuracy and limitations of each generation are summarized.
This document discusses the use of lasers in endodontics. It begins with a brief history of lasers, describing their development from Einstein's work in the early 1900s to their first use in dentistry in the 1970s. It then covers laser physics and components, different types of lasers including wavelengths used in dentistry, and laser tissue interactions. The main body discusses several clinical applications of lasers in endodontics such as pulp testing, pulp capping, pulpotomy, root canal disinfection and shaping, and endosurgery. Lasers can provide benefits like reduced need for anesthesia, hemostasis, and less collateral damage compared to other tools. Training is required and no single laser can perform all
This document discusses methods for determining the working length in root canals. It defines key terms like working length, cementodentinal junction, and apical constriction. It describes the significance of accurately determining working length and consequences of being over or under extended. Both radiographic and non-radiographic methods are outlined, including their advantages and limitations. The document concludes that no single method is entirely satisfactory and that a combination of methods should be used to accurately determine working length.
This document discusses endodontic retreatment. It defines retreatment as removing root canal filling materials from a tooth to clean, shape, and re-obturate the canals. Reasons for retreatment include persistent or reinroduced intraradicular microorganisms, extraradicular infection, foreign body reaction, or true cysts. Evaluation involves clinical examination, radiographs, and assessing for symptoms like pain, swelling or sinus tracts. Success is defined as resolution of symptoms and periapical radiolucency, while failure is persistence or worsening of these signs.
This document provides an overview of working length determination in endodontics. It discusses the historical perspectives on working length, important definitions like working length and anatomical structures at the root apex. Methods of determining working length are also covered, including both radiographic and non-radiographic techniques. Factors that influence working length like root canal anatomy and methods to prevent loss of working length are described. The importance of accurately determining working length for treatment success is emphasized.
Veneers are a conservative treatment to improve the appearance of teeth. They involve bonding thin facings of tooth-colored material to the front of teeth. Veneers can be made of composite resin, porcelain, or other ceramic materials. They are either bonded directly during a single appointment or indirectly with impressions taken and veneers fabricated by a dental laboratory over two appointments. Veneers can repair damage, close gaps, change the shape or length of teeth, or improve discoloration while minimizing the removal of tooth structure. The choice of material and technique depends on the specific needs and preferences of the patient.
The document discusses guidelines for preparing access cavities for root canal treatment. It outlines principles such as removing all caries and defective restorations, conserving tooth structure, and providing straight-line access to canal orifices. Specific guidelines covered include visualizing internal anatomy, evaluating anatomical landmarks, preparing cavities through lingual/occlusal surfaces, and locating all root canals before placing a dental dam. The goal is to efficiently locate and treat all canals following principles of access cavity design.
working length estimation in endodontic Marwa Ahmed
The document discusses methods for determining working length in root canals. It describes both radiographic and non-radiographic methods. Radiographic methods include Grossman's formula, Ingles method, Weine's modification, and use of xeroradiography and radiovisiography. Non-radiographic methods discussed are digital tactile sense, apical periodontal sensitivity, paper point measurement, and use of electronic apex locators. Electronic apex locators are highlighted as an important advancement, with different generations discussed varying in their measurement of resistance, impedance, or frequency. Accuracy and limitations of different methods are also reviewed.
This document provides an overview of endodontics. It defines endodontics as the branch of dentistry concerned with the morphology, physiology, and pathology of the dental pulp and periradicular tissues. The scope of endodontics includes treating diseases of the pulp, such as pulpal inflammation and infection, through both nonsurgical and surgical root canal treatment and periradicular surgery. Pathogenesis is discussed, noting that while physical and chemical factors can induce inflammation, microbial infection is essential for progression of pulpal and periradicular disease. Routes of canal infection and the focal infection theory are also summarized.
Radiography is essential for endodontic diagnosis, treatment, and evaluation of treatment outcomes. It helps determine pulpal and periapical pathology, root and canal morphology, working lengths, location of missed canals, and quality of obturation. Key radiographic views include diagnostic, working length, post-treatment, and recall films. Diagnostic films aim to visualize 3-4mm beyond the apex to identify lesions. Angulation and tube shift techniques help differentiate superimposed structures. Features like lamina dura continuity, lesion borders, density and effects on adjacent structures aid diagnosis. Newer technologies include digital radiography and cone beam CT for improved visualization of complex anatomy.
This document discusses space maintainers, which are appliances used to maintain space for permanent teeth after premature loss of primary teeth. It describes different types of space maintainers including removable, fixed, lingual arch, and distal shoe appliances. Key factors in planning space maintenance like dental age and sequence of eruption are outlined. The document summarizes indications, contraindications, advantages and disadvantages of various space maintainer designs. Space maintainers aim to guide proper eruption of permanent teeth into ideal alignment and occlusion.
Endodontic mishaps include procedural errors that can occur during root canal treatment such as ledge formation, canal perforation, separated instruments, and overfilling/underfilling of canals. It is important for practitioners to understand how to recognize, prevent, and treat these mishaps. Common causes include inadequate access, excessive force, or improper instrument use. Perforations require immediate sealing with materials like MTA to achieve the best prognosis. Separated instruments may be bypassed or retrieved, while ledges can sometimes be circumvented with smaller files. Overall, minimizing errors requires adherence to principles like conservative access, copious irrigation, and careful instrumentation.
In this lecture I explain the basic concept of root canal filling or what called obturation. The lectures discuss different techniques used in that matter in step-by-step fashion and explanatory pictures.
It is directed to the level of undergraduate mind.
- Endodontic instruments have evolved over time to have standardized sizes and tapers. Ingle and LeVine suggested standardizing diameters that increase by 0.05mm while maintaining a constant taper.
- Instruments are now numbered 6-140 based on tip diameter in hundredths of a millimeter. The diameter increases 0.32mm over the first 16mm of the instrument.
- Instruments can be hand operated, low-speed, engine-driven, or ultrasonic/sonic and are used for cleaning and shaping root canals.
Phase I periodontal therapy is the first in the chronologic sequence of procedures that constitute periodontal treatment. It is also referred to as cause related therapy or non-surgical periodontal therapy.
Iatrogenic Perforation- A guide to fixing the hole in your patient's toothTaseef Hasan Farook
An overview of the possible types of perforation that may occur during endodontic treatment with their management. This slide presentation covers multiple management possibilities of said perforation proposed by various clinicians from around the world which can aid the readers in their treatment plan for the repair of a tooth perforation
Working length is the distance from a coronal reference point to the point where canal preparation and obturation should terminate. It is important to determine working length precisely using radiographs or electronic apex locators. The radiographic method involves measuring the total length of the tooth on preoperative radiographs, subtracting 1mm as a safety factor, and confirming length under radiograph after instrumentation. Electronic apex locators use electric current to detect the apical foramen. Tactile methods are unreliable due to risk of over-instrumentation or under-instrumentation.
The document discusses focal infection and inflammation in the dental pulp. It describes how microorganisms from infected dental sites can spread through the bloodstream and lymphatic system, potentially causing infection elsewhere. When the pulp becomes inflamed in response to injury or infection, it undergoes degenerative or proliferative changes. The "FISH" study identified four zones of tissue reaction around an infected area: the zone of infection, contamination, irritation, and stimulation. Kronfeld's mountain pass theory applied this concept to explain the inflammatory response in the periapex as a defensive reaction analogous to a military mobilization.
radiographic diagnosis of periodontal diseaseshabeel pn
Radiographs are an essential tool for diagnosing periodontal disease by assessing bone loss. Early periodontitis appears on radiographs as localized bone erosions while advanced cases show generalized horizontal bone loss. Vertical bone defects can also be seen, appearing as widened ligament spaces or loss of cortical plates. Furcation involvement initially widens the ligament but may progress to deep vertical defects. Aggressive periodontitis in young people causes rapid, widespread bone destruction and early tooth loss. Follow-up radiographs after treatment can demonstrate bone fill-in and sharpening of bony contours.
4.furcation involvement and its treatmentpunitnaidu07
This document discusses furcation involvement in multi-rooted teeth. It begins with introductions and definitions, then describes the anatomy of furcated teeth. Several classifications of furcation involvement are presented based on horizontal and vertical bone loss. Potential etiologies include dental plaque, local anatomic factors like furcation dimensions and root concavities, developmental anomalies, trauma, caries, and pulpal pathology. Diagnosis and various treatment options are also covered, along with prognostic factors and conclusions.
Fixed partial dentures transmit forces through the abutments to the periodontium. Failures are due to poor engineering, the use of improper materials, inadequate tooth preparation, and faulty fabrication. Of particular concern to prosthodontist is the selection of teeth for abutments. They must recognize the forces developed by the oral mechanism, and resistance.
Successful selection of abutments for fixed partial dentures requires sensitive diagnostic ability. Thorough knowledge of anatomy, ceramics, the chemistry and physics of dental materials, metallurgy, Periodontics, phonetics, physiology, radiology and the mechanics of oral function is fundamental.
The document discusses the use of magnification in endodontics. It begins with a brief history of magnification tools used in dentistry, from early microscopes to modern dental operating microscopes (DOM). It then defines various optical terms and describes different magnification tools including loupes, DOM, and rod lens endoscopes. The bulk of the document focuses on DOM, outlining its components, how it works, proper positioning and use. It concludes that DOM provides significant benefits for endodontic procedures by enabling preservation of tooth structure, localization of anatomy, and detection of fractures or separated instruments.
The document discusses working length determination in endodontics. It defines working length as the distance from a coronal reference point to the point where canal preparation and obturation should terminate. This is usually 1mm short of the apical foramen. Several methods of determining working length are discussed, including radiographic methods and the use of electronic apex locators, which provide objective measurements with high accuracy. Consequences of working length that is too long or too short are also outlined.
This document provides an overview of endodontic surgery. It begins with a brief history of endodontic surgery dating back over 1500 years. It then discusses the definition, rationale, objectives, and indications for endodontic surgery. The document outlines the classification of endodontic surgery and describes various surgical procedures like periradicular surgery, root-end resection, and root-end filling. It provides details on surgical instruments, treatment planning considerations, and techniques for achieving profound local anesthesia. In summary, the document provides a comprehensive review of the principles and procedures involved in endodontic surgery.
LASERS IN ENDODONTICS AND CONSERVATIVE DENTISTRYBlagoja Lazovski
Laser technology is used in dentistry for a variety of applications. Lasers can be used for soft tissue procedures, hard tissue procedures, detection of cavities, teeth whitening, and curing of dental materials. The erbium laser is particularly useful as it allows for ablation of hard dental tissues with minimal thermal damage. Lasers offer advantages over traditional dental tools like drills in being more precise and causing less pain for patients.
This document discusses different methods of cosmetic tooth whitening or bleaching. It describes intrinsic and extrinsic tooth discoloration and their causes. The main methods covered are in-office bleaching, laser bleaching, and dentist-prescribed home bleaching kits. In-office bleaching uses high concentration peroxide gels applied by the dentist. Home bleaching involves patients wearing custom-fitted trays with lower concentration peroxide gels overnight. Non-vital bleaching treats discoloration inside teeth without pulps. Factors like concentration, time, temperature, and additives affect bleaching results. Potential side effects include temporary tooth sensitivity.
This lecture explain to undergraduate dentists the basics and most commonly used endodontic instruments in daily practice. It is not meant to be a complete observation, rather a simplified approach to define these basic instruments.
X-rays are a form of electromagnetic radiation with wavelengths between 0.01 to 10 nanometers that can penetrate some materials like soft tissue. The three main components of an x-ray machine are the vacuum tube, high voltage power source, and operating console. X-rays are produced when electrons are accelerated toward a metal target in the vacuum tube. They are used medically for diagnostic imaging like radiography and mammograms due to their non-invasive nature, though overexposure can increase cancer risk.
The document discusses guidelines for preparing access cavities for root canal treatment. It outlines principles such as removing all caries and defective restorations, conserving tooth structure, and providing straight-line access to canal orifices. Specific guidelines covered include visualizing internal anatomy, evaluating anatomical landmarks, preparing cavities through lingual/occlusal surfaces, and locating all root canals before placing a dental dam. The goal is to efficiently locate and treat all canals following principles of access cavity design.
working length estimation in endodontic Marwa Ahmed
The document discusses methods for determining working length in root canals. It describes both radiographic and non-radiographic methods. Radiographic methods include Grossman's formula, Ingles method, Weine's modification, and use of xeroradiography and radiovisiography. Non-radiographic methods discussed are digital tactile sense, apical periodontal sensitivity, paper point measurement, and use of electronic apex locators. Electronic apex locators are highlighted as an important advancement, with different generations discussed varying in their measurement of resistance, impedance, or frequency. Accuracy and limitations of different methods are also reviewed.
This document provides an overview of endodontics. It defines endodontics as the branch of dentistry concerned with the morphology, physiology, and pathology of the dental pulp and periradicular tissues. The scope of endodontics includes treating diseases of the pulp, such as pulpal inflammation and infection, through both nonsurgical and surgical root canal treatment and periradicular surgery. Pathogenesis is discussed, noting that while physical and chemical factors can induce inflammation, microbial infection is essential for progression of pulpal and periradicular disease. Routes of canal infection and the focal infection theory are also summarized.
Radiography is essential for endodontic diagnosis, treatment, and evaluation of treatment outcomes. It helps determine pulpal and periapical pathology, root and canal morphology, working lengths, location of missed canals, and quality of obturation. Key radiographic views include diagnostic, working length, post-treatment, and recall films. Diagnostic films aim to visualize 3-4mm beyond the apex to identify lesions. Angulation and tube shift techniques help differentiate superimposed structures. Features like lamina dura continuity, lesion borders, density and effects on adjacent structures aid diagnosis. Newer technologies include digital radiography and cone beam CT for improved visualization of complex anatomy.
This document discusses space maintainers, which are appliances used to maintain space for permanent teeth after premature loss of primary teeth. It describes different types of space maintainers including removable, fixed, lingual arch, and distal shoe appliances. Key factors in planning space maintenance like dental age and sequence of eruption are outlined. The document summarizes indications, contraindications, advantages and disadvantages of various space maintainer designs. Space maintainers aim to guide proper eruption of permanent teeth into ideal alignment and occlusion.
Endodontic mishaps include procedural errors that can occur during root canal treatment such as ledge formation, canal perforation, separated instruments, and overfilling/underfilling of canals. It is important for practitioners to understand how to recognize, prevent, and treat these mishaps. Common causes include inadequate access, excessive force, or improper instrument use. Perforations require immediate sealing with materials like MTA to achieve the best prognosis. Separated instruments may be bypassed or retrieved, while ledges can sometimes be circumvented with smaller files. Overall, minimizing errors requires adherence to principles like conservative access, copious irrigation, and careful instrumentation.
In this lecture I explain the basic concept of root canal filling or what called obturation. The lectures discuss different techniques used in that matter in step-by-step fashion and explanatory pictures.
It is directed to the level of undergraduate mind.
- Endodontic instruments have evolved over time to have standardized sizes and tapers. Ingle and LeVine suggested standardizing diameters that increase by 0.05mm while maintaining a constant taper.
- Instruments are now numbered 6-140 based on tip diameter in hundredths of a millimeter. The diameter increases 0.32mm over the first 16mm of the instrument.
- Instruments can be hand operated, low-speed, engine-driven, or ultrasonic/sonic and are used for cleaning and shaping root canals.
Phase I periodontal therapy is the first in the chronologic sequence of procedures that constitute periodontal treatment. It is also referred to as cause related therapy or non-surgical periodontal therapy.
Iatrogenic Perforation- A guide to fixing the hole in your patient's toothTaseef Hasan Farook
An overview of the possible types of perforation that may occur during endodontic treatment with their management. This slide presentation covers multiple management possibilities of said perforation proposed by various clinicians from around the world which can aid the readers in their treatment plan for the repair of a tooth perforation
Working length is the distance from a coronal reference point to the point where canal preparation and obturation should terminate. It is important to determine working length precisely using radiographs or electronic apex locators. The radiographic method involves measuring the total length of the tooth on preoperative radiographs, subtracting 1mm as a safety factor, and confirming length under radiograph after instrumentation. Electronic apex locators use electric current to detect the apical foramen. Tactile methods are unreliable due to risk of over-instrumentation or under-instrumentation.
The document discusses focal infection and inflammation in the dental pulp. It describes how microorganisms from infected dental sites can spread through the bloodstream and lymphatic system, potentially causing infection elsewhere. When the pulp becomes inflamed in response to injury or infection, it undergoes degenerative or proliferative changes. The "FISH" study identified four zones of tissue reaction around an infected area: the zone of infection, contamination, irritation, and stimulation. Kronfeld's mountain pass theory applied this concept to explain the inflammatory response in the periapex as a defensive reaction analogous to a military mobilization.
radiographic diagnosis of periodontal diseaseshabeel pn
Radiographs are an essential tool for diagnosing periodontal disease by assessing bone loss. Early periodontitis appears on radiographs as localized bone erosions while advanced cases show generalized horizontal bone loss. Vertical bone defects can also be seen, appearing as widened ligament spaces or loss of cortical plates. Furcation involvement initially widens the ligament but may progress to deep vertical defects. Aggressive periodontitis in young people causes rapid, widespread bone destruction and early tooth loss. Follow-up radiographs after treatment can demonstrate bone fill-in and sharpening of bony contours.
4.furcation involvement and its treatmentpunitnaidu07
This document discusses furcation involvement in multi-rooted teeth. It begins with introductions and definitions, then describes the anatomy of furcated teeth. Several classifications of furcation involvement are presented based on horizontal and vertical bone loss. Potential etiologies include dental plaque, local anatomic factors like furcation dimensions and root concavities, developmental anomalies, trauma, caries, and pulpal pathology. Diagnosis and various treatment options are also covered, along with prognostic factors and conclusions.
Fixed partial dentures transmit forces through the abutments to the periodontium. Failures are due to poor engineering, the use of improper materials, inadequate tooth preparation, and faulty fabrication. Of particular concern to prosthodontist is the selection of teeth for abutments. They must recognize the forces developed by the oral mechanism, and resistance.
Successful selection of abutments for fixed partial dentures requires sensitive diagnostic ability. Thorough knowledge of anatomy, ceramics, the chemistry and physics of dental materials, metallurgy, Periodontics, phonetics, physiology, radiology and the mechanics of oral function is fundamental.
The document discusses the use of magnification in endodontics. It begins with a brief history of magnification tools used in dentistry, from early microscopes to modern dental operating microscopes (DOM). It then defines various optical terms and describes different magnification tools including loupes, DOM, and rod lens endoscopes. The bulk of the document focuses on DOM, outlining its components, how it works, proper positioning and use. It concludes that DOM provides significant benefits for endodontic procedures by enabling preservation of tooth structure, localization of anatomy, and detection of fractures or separated instruments.
The document discusses working length determination in endodontics. It defines working length as the distance from a coronal reference point to the point where canal preparation and obturation should terminate. This is usually 1mm short of the apical foramen. Several methods of determining working length are discussed, including radiographic methods and the use of electronic apex locators, which provide objective measurements with high accuracy. Consequences of working length that is too long or too short are also outlined.
This document provides an overview of endodontic surgery. It begins with a brief history of endodontic surgery dating back over 1500 years. It then discusses the definition, rationale, objectives, and indications for endodontic surgery. The document outlines the classification of endodontic surgery and describes various surgical procedures like periradicular surgery, root-end resection, and root-end filling. It provides details on surgical instruments, treatment planning considerations, and techniques for achieving profound local anesthesia. In summary, the document provides a comprehensive review of the principles and procedures involved in endodontic surgery.
LASERS IN ENDODONTICS AND CONSERVATIVE DENTISTRYBlagoja Lazovski
Laser technology is used in dentistry for a variety of applications. Lasers can be used for soft tissue procedures, hard tissue procedures, detection of cavities, teeth whitening, and curing of dental materials. The erbium laser is particularly useful as it allows for ablation of hard dental tissues with minimal thermal damage. Lasers offer advantages over traditional dental tools like drills in being more precise and causing less pain for patients.
This document discusses different methods of cosmetic tooth whitening or bleaching. It describes intrinsic and extrinsic tooth discoloration and their causes. The main methods covered are in-office bleaching, laser bleaching, and dentist-prescribed home bleaching kits. In-office bleaching uses high concentration peroxide gels applied by the dentist. Home bleaching involves patients wearing custom-fitted trays with lower concentration peroxide gels overnight. Non-vital bleaching treats discoloration inside teeth without pulps. Factors like concentration, time, temperature, and additives affect bleaching results. Potential side effects include temporary tooth sensitivity.
This lecture explain to undergraduate dentists the basics and most commonly used endodontic instruments in daily practice. It is not meant to be a complete observation, rather a simplified approach to define these basic instruments.
X-rays are a form of electromagnetic radiation with wavelengths between 0.01 to 10 nanometers that can penetrate some materials like soft tissue. The three main components of an x-ray machine are the vacuum tube, high voltage power source, and operating console. X-rays are produced when electrons are accelerated toward a metal target in the vacuum tube. They are used medically for diagnostic imaging like radiography and mammograms due to their non-invasive nature, though overexposure can increase cancer risk.
Maxilla and mandible – benign & malignant tumoursNavdeep Shah
- There are normally 20 primary teeth and 32 permanent teeth. Two systems are used to number teeth - the Zsigmondy system and FDI notation.
- All teeth consist of a crown covered in enamel and a root covered in cementum. Inside is the pulp and periodontal ligament.
- Dental disorders seen on radiographs include tooth abnormalities like amelogenesis imperfecta and dentinogenesis imperfecta. Cysts like radicular cysts and dentigerous cysts appear as well-defined radiolucencies. Odontogenic keratocysts are irregularly shaped and lack the ballooning appearance of other cysts.
The document outlines general rules for dental X-ray exposure, including explaining the procedure to the patient, positioning the patient correctly, adjusting exposure factors, ensuring the film is parallel to the tooth, and taking precautions like using lead shields. Key steps are positioning the patient, setting exposure factors to get the right angle and focus, placing the film properly, and processing it safely after capturing the image.
The document discusses anatomical landmarks that are visible on radiographs of the teeth and jaws. It describes radiolucent and radiopaque structures of the tooth and surrounding bone, including the pulp, periodontal ligament space, enamel, dentin, cementum, lamina dura, alveolar bone and crest. It also lists radiolucent and radiopaque landmarks of the maxilla and mandible, such as the maxillary sinus, nasal fossa, mandibular canal, mental foramen and rami. The document is intended to familiarize dental students with normal anatomical structures seen on dental radiographs.
This document provides an overview of radiographic techniques and interpretations in endodontic diagnosis. It discusses the history of dental radiography and various radiographic techniques including intraoral periapical, bitewing, occlusal, tomography, computed tomography, cone beam computed tomography, scanography, stereography, magnetic resonance imaging, digital subtraction radiography and direct digital radiography. It also covers interpreting dental caries, trauma, pulpal and periapical lesions, restorations and dental materials, and root canal anatomy on radiographs. The document emphasizes that cone beam computed tomography is more accurate than conventional radiography for detecting vertical root fractures in teeth with metallic posts.
This document summarizes the history and importance of radiography in endodontics. It discusses pioneers like Roentgen who discovered x-rays and Walkoff who took the first dental x-ray. Radiographs are described as the single most important diagnostic tool for determining anatomy, diagnosis, and monitoring treatment. The document outlines ideal requirements for endodontic films and film holders, advantages of bitewings, indications for occlusal films, and principles of positioning films and adjusting cone angulation. It emphasizes that radiographs are essential for treatment but should be fixed, dried, and documented properly.
Recent advances in imaging techniques/ /certified fixed orthodontic courses b...Indian dental academy
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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.
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Digital radiography uses sensors instead of film to capture dental x-rays digitally. This allows images to be displayed and stored electronically, reducing radiation exposure compared to conventional film. There are two main types of digital sensors: direct sensors that directly connect to a computer, and indirect sensors that use reusable phosphor plates scanned by a separate device. Digital images can be enhanced, measured, and stored indefinitely, aiding in diagnosis and treatment planning. While equipment and maintenance costs are higher than film, digital imaging provides advantages in areas like endodontics, orthodontics, implantology, and periodontics.
The x-ray beam is also at an angle to both
the teeth and film. As a result, distortion occurs. In the
radiograph of the mandibular first molar below, the
buccal root appears elongated and narrower than the
palatal root due to the angulation of the x-ray beam.
Burs, mirrors, probes and excavators are used to prepare the access cavity and remove pulp tissue. K-files, reamers, and Hedstrom files are used to shape the root canal in a twisting motion. NiTi files are used to initially flare canals. Gates Glidden drills and Peeso reamers further widen canals. Irrigation, paper points and gutta percha are used to clean canals and conduct root canal fillings. Spreaders and pluggers are used to condense gutta percha during filling.
This document provides an overview of digital radiography. It discusses the history, general principles, detectors, advantages, and disadvantages of digital radiography. Digital radiography was first developed in 1980 and makes radiographic images digitally stored and viewable on computers. The document focuses on the two main types of detectors used: flat panel detectors and high-density line-scan solid state detectors. Flat panel detectors can be indirect, using a scintillator, or direct, converting x-rays directly into charge. Digital radiography provides benefits like instant viewing, less radiation dose, and ability to share images digitally, but has higher costs than traditional radiography.
The document discusses different types of radiography technologies, including computed radiography (CR), direct digital radiography (DR), and the components and layers of imaging plates (IPs) used in CR. It also covers image processing techniques for CR/DR such as histogram generation, exposure compensation, and potential artifacts that can occur during acquisition, post-acquisition or display.
Digital radiography systems have replaced analog film-based systems. There are several types of digital radiography including computed radiography, scanned projection radiography, and indirect and direct digital radiography. Computed radiography uses a photostimulable phosphor plate to capture x-rays and a laser scanner to read the plate digitally. Scanned projection radiography functions similar to a CT scanner to produce digital radiographic images. Indirect and direct digital radiography use detectors like CCDs or photodiodes coupled with scintillators to directly convert x-rays to digital signals. Digital radiography allows for post-processing of images and reduces need for film and processing.
The document discusses different types of digital radiography technologies including computed radiography which uses photostimulable phosphor plates, indirect digital radiography using a scintillator and photodiode array, and direct digital radiography using photoconductive materials. It covers the processes of image acquisition, processing, display, and archiving for digital radiography systems. Key differences between direct and indirect digital radiography technologies are also outlined.
The document discusses radiographic interpretation in dentistry. It covers topics such as the components and role of radiographs, their use in diagnosis, and the steps involved in radiographic interpretation. Interpretation involves a three step process of visualization, perception, and integrating information. Key aspects of analyzing radiographs include examining the quality, viewing conditions, anatomical accuracy, and using a systematic approach to analyze normal anatomy, bone patterns, individual teeth, and associated structures.
This document provides an overview of a dental radiology course for postgraduate students taught by Dr. Ossama El-Shall. The course covers topics such as radiation physics, x-ray machines, biological effects of radiation, safety and protection in dentistry, dental radiographic films and techniques, and specialized imaging techniques. The document also lists the contents that will be discussed in part I of the course, including terminology, radiation physics, properties of x-rays, and dental x-ray apparatus and production.
Digital Radiography in Dentistry Seminar by Dr PratikDr Pratik
Digital radiography involves capturing x-ray images digitally rather than on film. The document discusses the history of digital radiography from its origins in the late 20th century to current technologies. It defines key terminology used in digital radiography such as resolution, contrast, pixel size, and describes different types of digital x-ray receptors including CCD, CMOS, flat panel detectors, and PSP. Advantages of digital radiography over film-based methods are also mentioned.
Endodontics is the specialty of dentistry that manages the dental pulp and surrounding tissues. It involves diagnosing and treating issues like pulpal nerve damage, which can cause pain or sensitivity. Diagnostic tests are used to examine the tooth and determine the specific condition, such as pulpitis or a periradicular abscess. Common endodontic procedures include pulpotomy, pulpectomy, and root canal therapy which aim to preserve or remove the pulp and disinfect and fill the root canals. Surgical endodontic procedures like apicoectomy and retrograde restoration are needed when non-surgical root canal treatment fails or to address anatomical issues.
Imaging for dental implants is a simplified informative presentation about imaging modalities used in dental implants procedure. it will give you a brief about the development of the Xray.
brief description about CONTENTS Introduction Principles of panoramic imaging Image layer Panoramic machines Panoramic film Patient positioning Interpreting the panoramic imaging INDICATION Advantages Disadvantages Conclusion References
3. INTRODUCTION • Panoramic imaging also called pantomography is a technique for producing a single tomographic image of facial structures that includes both the maxillary and mandibular dental arches and their supporting structures . • This is a curvilinear variant of conventional tomography.
4. PRINCIPLES OF PANORAMIC IMAGE FORMATION • Patero and Numata - describe the principles of panoramic radiography • based on the principle of reciprocal movement of x-ray source and an image receptor around a central point or plane called the image layer, in which the OBJECT of image is located. • OBJECT in front or behind this image are not clearly captured because of their movement relative to the centre of rotation of the receptor and the x-ray source.
5. The film and x-ray tubehead move around the patient in opposite directions in panoramic radiography
6. ROTATION CENTER The pivotal point or axis around which the cassette carrier and tube head rotate is termed rotation center Three basic rotation center used in panoramic radiography Double centre rotation Triple centre rotation moving centre rotation The location and number of rotational centers INFLUENCE size and shape of focal trough
7. IMAGE LAYER • Also known as focal trough • It is a three dimensional curved zone where the structures lying within this layer are reasonably well defined on final panoramic image. • The structures seen on a panoramic image are primarily those located within image layer. • OBJECTSoutside the image layer are blurred magnified are reduced in size. Even distorted to the extent of not being recognizable. • This shape of image layer varies with the brand of equipment used.
8. FOCAL TROUGH
9. FACTORS AFFECTING SIZE OF IMAGE LAYER: Arc path Velocity of receptor and X-ray tube head Alignment of x-ray beam Collimator width The location of image layer change with extensive machine used so recalibration may be necessary if consistently suboptimal images are produced. As a position of object is moved within the image layer size and shape of image layer change.
10. PANORAMIC UNIT
11. A, Orthophos XG Plus extraoral x-ray machine. B, Orthoralix 8500 extraoral x-ray machine. C, Example of a digital panoramic system
12. PARTS OF PANORAMIC UNITS a. x-ray tube head b. head positioner: chin rest notched bite block forehead rest lateral head support c. exposure controls
13. X-RAY TUBE HEAD: • Similar to intraoral x-ray tube head • Each has a filament to produce electrons and a target to produce x-rays • Collimator is a lead plate with narrow vertical slit • Narrow x-ray beam emerges from collimator minimize patient exposure to radiation
1
1) Dacryocystorhinostomy (DCR) is a surgical procedure to treat nasolacrimal duct obstruction by creating a passage between the lacrimal sac and the nasal cavity.
2) There are three main techniques for DCR - external DCR, conventional endonasal DCR, and endonasal laser-assisted DCR.
3) Each technique has advantages and disadvantages such as success rate, risk of complications, need for general anesthesia, and disruption of surrounding anatomy. The choice depends on each patient's situation.
Diagnostic imaging plays an important role in treatment planning for dental implants. This document discusses various imaging modalities and their use at different phases of implant treatment. 2D imaging like panoramic radiographs provide an overall view but lack detail. Cross-sectional imaging like CT provides more detailed assessment of bone dimensions, quality and proximity to anatomical structures, important for accurate implant planning and placement. The selection of an appropriate imaging technique depends on the treatment phase and desired information.
Ultrasound biomicroscopy (UBM) provides high-resolution imaging of ocular structures in the anterior segment of the eye using 50 MHz ultrasound. UBM allows visualization of tissues like the ciliary body and zonules that are not visible by slit lamp examination. UBM can be used to qualitatively and quantitatively evaluate the anterior segment structures and has applications in diagnosing and monitoring conditions like glaucoma, corneal diseases, tumors, and intraocular lenses. While UBM provides excellent detail, it has limitations including only being able to image about 5mm into the eye and requiring contact with the eye, unlike anterior segment OCT which is non-contact.
This document compares and contrasts AS-OCT (anterior segment optical coherence tomography) and ultrasound biomicroscopy (UBM) imaging techniques for evaluating the anterior eye segment.
It discusses that AS-OCT provides non-contact, high resolution cross-sectional imaging of the anterior segment structures without touching the eye. UBM uses high frequency ultrasound to generate detailed 2D images of the anterior segment, allowing visualization of structures like the iris and angle.
While both techniques allow qualitative and quantitative assessment of the anterior chamber angle and structures, AS-OCT has advantages of being non-contact, faster imaging, and less operator dependency compared to UBM. However, UBM can image deeper into the posterior iris and has greater penetration than
Pachymetry is the measurement of corneal thickness. The central corneal thickness in normal eyes ranges from 0.49 to 0.56 mm. Thicker corneas can indicate endothelial decompensation. Several techniques are used to measure corneal thickness including ultrasonic pachymetry, specular microscopy, optical coherence tomography, and confocal microscopy. Measurement of corneal thickness is important for diagnosing and managing conditions like glaucoma, refractive surgery, and contact lens wear.
This document summarizes techniques for cataract surgery, including:
1. Cataract surgery has evolved into a refractive procedure to reduce spectacle dependence. Various techniques can be used to correct astigmatism including limbal relaxing incisions and toric IOLs.
2. Accurate biometry measurements of axial length are critical for determining the correct IOL power. Both ultrasound A-scan and optical coherence tomography can be used, with advantages and disadvantages to each.
3. Surgical techniques like capsulorrhexis, hydrodissection, phacoemulsification, and divide-and-conquer are described to efficiently remove the cataract while minimizing complications. Proper wound construction
This document discusses the use of radiology in pediatric dentistry. It begins by acknowledging those who helped present the information. It then provides an introduction to how radiology plays an important role in diagnosis and treatment planning. It discusses key points to consider when planning radiographs, such as avoiding retakes. The document outlines guidelines for prescribing radiographs based on a patient's development, pathologic needs, and post-treatment evaluation. It describes common radiographic techniques and films used in pediatric patients.
UBM provides high resolution imaging of the anterior segment structures in a non-invasive manner. It can image structures like the ciliary body and zonules that
This document provides an overview of various radiographic techniques used in dentistry. It discusses the parts of an x-ray tube and principles of projection geometry such as focal spot, magnification, distortion, and the heel effect. It describes various intraoral radiographs including periapical, bite wing, and occlusal radiographs. Details are provided on paralleling and bisecting angle techniques for periapical radiographs as well as film placement in children. Extraoral techniques like cephalometric radiographs are also mentioned. The document concludes with topics on digital radiography, radiation protection, and effects of dental radiographs.
This document discusses radiology techniques used in pediatric dentistry. It begins with an introduction on the importance of radiology for diagnosis and treatment planning in children. It then covers the history of x-rays, different types of intraoral and extraoral radiographs, indications for their use, guidelines for prescribing radiographs in children, and techniques including modifications for infants. Radiation hazards and protections are also mentioned.
Panoramic radiography provides a wide view of the dental arches and associated structures using a rotating x-ray beam. It was developed starting in the 1920s to image the entire jaw at once. Modern panoramic machines use tomography to produce a single focused plane, known as the focal trough. This allows for detailed imaging of teeth and jaw structures while minimizing radiation exposure compared to full mouth x-rays. Panoramic images can reveal both normal anatomy as well as abnormalities, though some structures may appear as doubled "ghost images" due to the scanning technique.
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
The anterior chamber angle structures and aqueous outflow system were summarized. The anterior chamber is bounded anteriorly by the cornea and posteriorly by the iris and lens. It contains aqueous humor and drains through the trabecular meshwork into Schlemm's canal and collector channels. Key angle structures include Schwalbe's line, trabecular meshwork, scleral spur, and ciliary body. Gonioscopy allows visualization and grading of the anterior chamber angle and is important for glaucoma evaluation and treatment planning.
This document discusses various imaging modalities used for dental implants. It begins by introducing implants as a viable option for tooth replacement and outlines three phases of implant imaging: pre-surgical, surgical/intraoperative, and post-prosthetic. Several imaging techniques are described including panoramic, periapical and cephalometric radiography as well as computed tomography. Advantages and limitations of each technique are provided. The document emphasizes that diagnostic imaging should be interpreted alongside a clinical examination.
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
B-scan ultrasonography produces real-time images of ocular structures using high frequency sound waves. It is useful for evaluating conditions like retinal detachment, tumors, and vitreous opacities. The technique involves placing a transducer probe on the eye to emit ultrasound and receive echoes. Different probe positions provide transverse, longitudinal, or axial scans of the eye. Normal tissues like vitreous and retina appear echolucent or reflective on scans depending on their structure and composition. Pathologies are identified based on their appearance, location, and movement patterns seen on the images. B-scan ultrasonography is a non-invasive imaging method useful when the ocular media is opaque.
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
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.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
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RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3
Radiology in Endodontics
1. RADIOLOGY
IN
ENDODONTICs
Presented By
Jean Michael
1
2. History
• 1895 – Discovery of cathode rays by Roentgen
• 1895 – Dr. Otto Walkoff took the 1st dental X ray
(of his own teeth)
• 1899 – Dr. Edmund Kells used Radiographs to
determine the root length during RCT
• 1900 – Dr. Weston Price advocated the use of
radiographs to check the adequacy of
root canal fillings
2
3. How To Obtain A Good Radiograph
1. Proper placement of film in the patient’s
mouth
2. Correct Angulation of the cone in relation to
the film and oral structures
3. Correct exposure time
4. Proper developing technique
3
4. Relevant Findings For An Endodontist
• Presence of Caries that may involve or threaten
to involve the Pulp
• Number, course, shape and length of root
canals
• Calcification or obliteration of pulp cavity
• Internal and External Resorption
• Thickening of Periodontal Ligament
• Nature and extend of Periapical and Alveolar
Bone Destruction
4
5. • Diagnose abnormalities like Dilaceration and
Taurodontism
• Diagnose fracture of root
• To estimate and confirm the length of root
canals before instrumentation (working length
determination)
• To confirm the position and adaptation of
master cone
• Evaluation of outcome of root canal therapy
(post operative radiograph)
5
12. Disadvantages of Radiographs
• Radiographs are 2D shadow of a 3D Object
• They are only suggestive and not the final
evidence in judging a clinical problem
• Bucco-lingual dimension cannot be assessed in
an IOPA
• The bacterial status of the hard and soft tissues
cannot be determined
• Chronic inflammatory tissues cannot be
differentiated from healed fibrous scar tissue
12
13. • Lesions of the medullary bone are undetected
in the radiographs till there is substantial bone
loss and the involvement of cortical bone
• For a hard tissue lesion to be evident on a
radiograph, there should be at least a mineral
loss of 6.6 %
• Even a single error in the procedure can render
a radiograph useless
• Over exposure to X rays are harmful to the body
and strict precautions are to be maintained for
the patient and the operator
13
15. ParallelingTechnique
• Film is placed parallel
to the long axis of
the tooth to be
radiographed
• The film is exposed
using X rays which
are perpendicular to
its surface
• Requires special film
holding devices
15
17. Bisecting Angle Technique
• The X rays pass
perpendicular to the
angular bisector of the
angle formed by the
long axis of the tooth
and the X ray film
• No film holding devices
are required
17
47. IOPA Radiographs in Endodontic Therapy
• Diagnostic Radiographs
• Working Radiographs
• Post operative Radiographs
• Follow up Radiographs
47
48. Diagnostic Radiographs
• Ideally, these radiographs should be taken
using paralleling angle technique
• They should be of high quality without any
foreshortening or elongination
• They help for proper diagnosis of the case
• These radiographs helps in determining the
prognosis by comparison with post operative
and follow up radiographs
48
50. Comparison between Diagnostic and
Follow up Radiographs
Periapical Cyst Before RCT Complete Bony repair after RCT
50
51. Working Radiographs
• These radiographs are used for determining
the position of instruments – files etc during
the procedure
• These radiographs are to be taken without
removing the rubber dam as it can cause
contamination of the operating field
• Bisecting angle technique can be used
• A better alternative is the use of a hemostat as
a film holding device
51
55. Advantages of using a Hemostat
• Film placement is easier when the opening is
restricted by the Rubber dam and frame
• In the mandibular posterior area, the closing
of mouth relaxes the mylohyoid muscle
permitting the film to be placed farther
apically
55
56. • The handle of the hemostat is a guide to align
the cone in a proper vertical and horizontal
angulation
• There is less risk of distortion caused by finger
pressure and film displacement as in bisecting
angle technique
• Any movement can be detected by the shift of
the handle and corrected before the exposure
56
63. Postoperative Radiographs
• They are used to evaluate the endodontic
treatment
• They are taken after removing the rubber dam
• Ideally paralleling angle technique should be
used
• They can be compared with the diagnostic
radiograph
63
68. Follow-up Radiographs
• These radiographs are taken to evaluate the
prognosis of the endodontically treated tooth
• After obturation, the tooth may have to
undergo procedures like core build up, crown
fabrication etc
• The follow up radiograph gives the health of
the periodontium and the tooth by evaluating
the presence of root resorption, other
treatment failures etc
68
74. Vertical Angulation
• Elongation – Corrected by increasing the
vertical angle of the central ray
• Foreshortening – Corrected by decreasing the
vertical angle of the central ray
74
75. Horizontal Angulation
Clarke’s Rule (S.L.O.B Rule)
• The object that moves in the SAME direction
as the cone is located toward the LINGUAL
• The object that moves in the OPPOSITE
direction as the cone is located toward the
BUCCAL
75
106. • The digital systems relies on an electronic
detection of an X ray generated image that is
electronically processed and reproduced on a
computer screen
106
107. Advantages
• Reduced exposure to radiation
• Increased speed of obtaining the image
• Possibility for digital enhancement
• Storage as digital data in computers
• Ease of transmissibility
• Elimination of manual processing steps
107
117. Conclusion
• Radiograph is a very powerful tool for a
dentist, especially an Endodontist with which
he are able to examine the status of hard
tissue which are beyond the field of his naked
eyes
• Application of radiology gives new standards
for the diagnosis, treatment and prognosis of
a dental problem
117
Fitting the master gutta-percha cone. A, Cone fit to radiographic terminus. B, Cone is cut back 0.5 mm.When placed to depth, the incisal reference remains the same. C, Compaction film reveals two apical foramina as well as large lateral canal opposite lateral lesion.
A, Bony lesion in furcation draining through buccalgingival sulcus. The molar pulp is necrotic. B, Obturation reveals the lateral accessory canal. C, Three-year recall radiograph. Total healing is apparent. No surgery was used.
A vital coronal pulp and associated periradicularresorptive lesions (arrows), most likely to occur in young persons, as demonstrated by a newly erupted, but cariously involved, second molar in a 15-year-old patient. Usually, a periradicular lesion is associated with necrotic pulp, as is the case on the first molar.
An avulsed left central incisor in a 6-year-old boy was replanted immediately. A,When re-evaluated after 8 weeks, there was still response to electric pulp testing. B, One year after trauma, the tooth was in the normal position and had no discoloration but did not respond to electric pulp testing. The root has continued to develop and the pulp appears to be calcifying. Also note hourglass erosion/resorption cervically(arrows). (Courtesy of Dr. Robert Bravin.)
Advanced internal resorption of a first molar. The process spread distally from the pulp to undermine restoration and perforate externally. The pulp is now necrotic, as evidenced by inflammatory lesion at apex. The cause of internal resorption may be from deep caries, pulp cap, or trauma from extraction of the second molar.
Differing pulp responses to trauma. Both incisors suffered impact as well as caries and restorative trauma. It is not clear why one pulp may react with extensive internal resorption and why another pulp may form calcifications. Treatment was successful in the central incisor but unsuccessful in the lateral incisor; the “cork-in-a-sewer” retrofilling failed.
Extensive internal resorption apparently triggered by iatral causes. Normal condition of teeth prior to crown preparation is seen in “before” radiographs (A and B). Development of internal resorption from high-speed preparation without water coolant is seen 1 year later (C and D).
External inflammatory resorption. A, Accidentally luxated tooth, radiograph taken 8 weeks after the incident. Note resorption of both dental hard tissues as well as adjacent alveolar bone. B, Immediately after root canal therapy. C, Control radiograph taken 12 months later. Note repair of the alveolus and establishment of a new periodontal ligament space. The root canal procedure arrested the resorptive process. (Courtsey of Dr. Romulo de Leon.)Figure 15-33 A, Internal resorption with a history of trauma. B, Immediately following root canal therapy.
Fractured premolar restored by endodontics and post-and-core crown. A, Tooth immediately following fracture. B, Restoration and periradicular healing at 3-year recall. Note the spectacular fill of arborization (arrows) at the apex. (Courtesy of Dr. Clifford J. Ruddle.)
Root fractures involve cementum, dentin, and pulp and may occur in any part of the root: apical, middle, or coronal thirds. B, Fractures may also be Comminuted (arrows).
A,Healing by interproximal bone. B, Root fracture (arrow) resulting in total separation of fragments. C,Midroot facture stabilizedfor 3 months. D, Note that after removing the splint, the incisal edges are even, yet a space is apparent between the segments. E, Eightmonths later, bone is now apparent between segments. F, The interproximal space has enlarged further 2 years after the accident. The toothis firm and functional. Note calcification of the pulp space.
C, Pulps of three incisors have been devitalized by the force of traumatic habit. Acute abscess has separated central incisors. D, One year following root canal therapy, some repair has occurred; however, persistent habit prevents complete healing.
Tooth luxation with loosening and displacement is often accompanied by fracture or comminution of the alveolar socket. B, Luxation displacement of left central and lateral incisor and canine (arrows). C, After repositioning. D, The incisor required root canal therapy about 3 months later. Canine retained its pulp vitality.
Apical condensing osteitis that developed in response to chronic pulpitis. Additional bony trabeculae have been formed and marrow spaces have been reduced to a minimum. The periodontal ligament space is visible, despite increased radiopacity of nearby bone.
Figure 5-9 A, Apical condensing osteitis associated with chronic pulpitis. Endodontic treatment has just been completed. Obvious condensation of alveolar bone (black arrow) is noticeable around the mesial root of the first molar. Radiolucent area is evident at the apex of the distal root of the same tooth. The retained primary molar root tip (open arrow) lies within the alveolar septum mesialto the molar. B, Resolution (arrow) of apical condensing osteitisshown in A, 1 year after endodontic treatment. From a radiographic standpoint, complete repair of both periradicular lesions has been obtained. Reversal of apical condensing osteitis and disappearance of radiopaque area are possible.
Enostosis. Also known as sclerotic bone. The radiopaque mass (arrows) probably represents an outgrowth of cortical bone on the endosteal surface. It is associated with neither pulpal nor periradicularpathosis and can be differentiated radiographically from condensing osteitis (see Figure 5-9) by its well-defined borders and homogeneous opacity
Canine
Circumferential dentigerous cyst developed around the crown of an unerupted canine. The cyst may be enucleated (care must be taken to avoid the incisor) and the canine brought into position with an orthodontic appliance.
Initial – Later – Intermediate - Mature
Unusual pulp dystrophy seen with hereditary hypophosphatemia. Incomplete calcification of dentin and huge pulps leave these teeth vulnerable to pulp infection and necrosis.