Gingival tissue management requires retraction and relapse process of gingival tissue. It is a process of exposing gingival margin while impression making of prepared teeth. Accurate reproduction of finish line is essential for fabrication of cast restoration. Hence, it is necessary to retract gingiva prior to impression making. We discussed the various parts and process of gingival tissue management in this presentation.
The double cord technique involves placing a small diameter cord in the gingival sulcus first, leaving it in place, and then packing a larger diameter cord over the first cord to provide additional retraction and hemostasis for making impressions of multiple prepared teeth or when the gingival tissues are compromised. The small inner cord provides retraction while the outer cord provides additional hemostasis and tissue displacement needed for accurate impressions.
This document discusses tissue conditioners and soft denture liners. It defines tissue conditioners as temporary resilient materials placed inside a denture for a short period to allow healing of traumatized tissues. Soft denture liners provide long-term cushioning and are made of materials like silicone or soft acrylic. The document outlines the ideal properties, uses, and application process for tissue conditioners. It also discusses the requirements for resilient denture liners to be biologically compatible, resilient, dimensionally stable, and resistant to staining and abrasion.
Impression Techniques in Fixed partial dentureDr.Richa Sahai
This document provides information on dental impressions, including:
- Criteria for an ideal impression include accurately recording all tooth structure and contours.
- Definitions of impression, impression material, and cast.
- Overview of different impression techniques discussed in literature such as stock tray, custom tray, copper band, and hydrocolloid impressions.
- Key steps for making impressions including use of retraction cords, evaluating the final impression, and pouring the stone cast.
- The document is intended to inform dentists on selecting appropriate impression materials and techniques.
The document discusses various techniques and materials for posterior composite restorations, including the use of liners to reduce marginal leakage and polymerization shrinkage stress. It also covers advances in dental adhesives that incorporate solvents and nanoparticles to improve bonding to dentin. Proper layering of composites incrementally is recommended to minimize shrinkage and debonding at restoration interfaces.
I will discuss various reference points for face bow.....
Thanks for watching......
If you like to watch my youtube channel..
please click for my channel....... Dr Aaryas Vlogs
https://youtu.be/myAENzQlHjE
Prosthodontics - realeff relevance in complete dentureKIIT ,BHUBANESWAR
The document discusses the Realeff effect, which refers to the resiliency and compressibility of oral mucosa that complete dentures rest on. It affects all steps of complete denture fabrication from impressions to final insertion. Factors like tissue health, consistency, and age can influence the Realeff effect. Understanding this effect is important for denture stability and preventing trauma to supporting tissues during the denture fabrication process.
Provisional restoration in fixed partial denturebhuvanesh4668
This document discusses various techniques for fabricating provisional restorations. It begins by defining provisional restorations and outlining their key requirements and purposes. It then describes common provisional luting materials and different types of provisional restorations that can be used. The remainder of the document focuses on detailing specific techniques for fabricating provisional restorations, including direct fabrication techniques, indirect techniques using impressions or templates, and the use of prefabricated crowns. Key steps are outlined for a variety of techniques.
Impression materials and gingival tissue managementNivedha Tina
The document discusses impression materials and gingival tissue management. It provides a history of impression materials from wax and plaster in 1782 to modern elastomers. Common materials like alginate and elastomers are classified and their properties and techniques described. Recent advances in alginates and impression techniques like CAD/CAM are also covered. The document also discusses gingival tissue management techniques like retraction and various retraction methods.
The double cord technique involves placing a small diameter cord in the gingival sulcus first, leaving it in place, and then packing a larger diameter cord over the first cord to provide additional retraction and hemostasis for making impressions of multiple prepared teeth or when the gingival tissues are compromised. The small inner cord provides retraction while the outer cord provides additional hemostasis and tissue displacement needed for accurate impressions.
This document discusses tissue conditioners and soft denture liners. It defines tissue conditioners as temporary resilient materials placed inside a denture for a short period to allow healing of traumatized tissues. Soft denture liners provide long-term cushioning and are made of materials like silicone or soft acrylic. The document outlines the ideal properties, uses, and application process for tissue conditioners. It also discusses the requirements for resilient denture liners to be biologically compatible, resilient, dimensionally stable, and resistant to staining and abrasion.
Impression Techniques in Fixed partial dentureDr.Richa Sahai
This document provides information on dental impressions, including:
- Criteria for an ideal impression include accurately recording all tooth structure and contours.
- Definitions of impression, impression material, and cast.
- Overview of different impression techniques discussed in literature such as stock tray, custom tray, copper band, and hydrocolloid impressions.
- Key steps for making impressions including use of retraction cords, evaluating the final impression, and pouring the stone cast.
- The document is intended to inform dentists on selecting appropriate impression materials and techniques.
The document discusses various techniques and materials for posterior composite restorations, including the use of liners to reduce marginal leakage and polymerization shrinkage stress. It also covers advances in dental adhesives that incorporate solvents and nanoparticles to improve bonding to dentin. Proper layering of composites incrementally is recommended to minimize shrinkage and debonding at restoration interfaces.
I will discuss various reference points for face bow.....
Thanks for watching......
If you like to watch my youtube channel..
please click for my channel....... Dr Aaryas Vlogs
https://youtu.be/myAENzQlHjE
Prosthodontics - realeff relevance in complete dentureKIIT ,BHUBANESWAR
The document discusses the Realeff effect, which refers to the resiliency and compressibility of oral mucosa that complete dentures rest on. It affects all steps of complete denture fabrication from impressions to final insertion. Factors like tissue health, consistency, and age can influence the Realeff effect. Understanding this effect is important for denture stability and preventing trauma to supporting tissues during the denture fabrication process.
Provisional restoration in fixed partial denturebhuvanesh4668
This document discusses various techniques for fabricating provisional restorations. It begins by defining provisional restorations and outlining their key requirements and purposes. It then describes common provisional luting materials and different types of provisional restorations that can be used. The remainder of the document focuses on detailing specific techniques for fabricating provisional restorations, including direct fabrication techniques, indirect techniques using impressions or templates, and the use of prefabricated crowns. Key steps are outlined for a variety of techniques.
Impression materials and gingival tissue managementNivedha Tina
The document discusses impression materials and gingival tissue management. It provides a history of impression materials from wax and plaster in 1782 to modern elastomers. Common materials like alginate and elastomers are classified and their properties and techniques described. Recent advances in alginates and impression techniques like CAD/CAM are also covered. The document also discusses gingival tissue management techniques like retraction and various retraction methods.
This document discusses relining and rebasing procedures for complete dentures. It defines relining as adding material to the denture base to improve fit, while rebasing involves replacing the entire denture base. Relining is indicated when dentures lose adaptation due to ridge resorption. Closed mouth techniques take impressions with the teeth in occlusion, while open mouth techniques record a new bite relationship. Impression materials and lab procedures are also outlined. The goal of relining is to prolong the useful life of dentures by improving fit as the ridges change.
The document discusses various concepts of occlusion for fixed partial dentures, including bilaterally balanced occlusion, unilaterally balanced occlusion, and mutually protected occlusion. Bilaterally balanced occlusion aims for simultaneous contact on both sides but is difficult to achieve, while unilaterally balanced occlusion distributes forces to multiple teeth on the working side only. Mutually protected occlusion relies on anterior guidance to prevent posterior contact during excursive movements. The concepts vary in their distribution of forces and indications depending on a patient's needs.
Biologic width - Importance in Periodontal and Restorative DentistryDr.Shraddha Kode
The document discusses the biologic width, which refers to the dimensions of the soft tissue attached to the tooth coronal to the alveolar bone crest. It consists of the junctional epithelium, connective tissue attachment, and the sulcular depth, totaling approximately 2-3 mm. Violation of the biologic width by placing restorative margins too far subgingivally can lead to bone resorption, gingival recession, or hyperplasia. The document outlines techniques for assessing biologic width dimensions and various surgical or orthodontic procedures to correct violations. Maintaining at least 3 mm of distance from the restorative margin to alveolar bone is important for periodontal health.
This document discusses the management of patients with xerostomia (dry mouth) in prosthodontics. It defines xerostomia and lists its common causes such as medications, medical conditions, and radiation therapy. Signs and symptoms include dry mouth, mouth cracks, tongue burning, and taste alteration. Problems for denture patients include reduced retention and increased friction. Management involves symptomatic relief, addressing underlying causes, stimulating residual gland function, using saliva substitutes, encouraging hydration, and optimizing oral hygiene. Prosthodontic treatments aim to improve retention, stability, and comfort through techniques like using metal denture bases and soft liners. Frequent recalls are needed due to increased risk of denture
Composite Resin Luting cements (2nd edition) presentation powerpoint
A type of dental cement
Used for cementation of indirect restorations & brackets
A summary of five textbooks
journal club presentation on prosthodonticsNAMITHA ANAND
This study measured and compared the stress transmitted to implants from different attachments for mandibular implant overdentures. An edentulous mandibular model with implants in the canine regions was fabricated. Strain gauges attached to the implants measured stress under vertical pressure applied to the denture. A locator attachment transferred more stress to the working side implant than a bar/clip attachment. Stress on implants decreased as the denture base length was reduced. The bar/clip attachment distributed stress more evenly between working and non-working side implants.
Full mouth rehabilitation FINAL PRESENTATIONNAMITHA ANAND
This document discusses full mouth rehabilitation (FMR), including:
- Definitions of FMR as restoring form and function of the masticatory system to a normal condition.
- Goals of FMR include achieving a stable centric occlusion, even distribution of stresses, and equalization of forces.
- Indications for FMR include restoring impaired function, preserving remaining teeth, and improving esthetics.
- Classification systems for patients requiring FMR, including those with excessive wear with or without loss of vertical dimension.
- Diagnostic tools used in planning FMR, such as models, radiographs, bite records, and diagnostic wax-ups.
This document discusses concepts and techniques related to occlusal rehabilitation. It covers topics such as centric relation, anterior guidance, restoring anterior and posterior teeth, and solving various occlusion problems. The Pankey-Mann-Schuyler philosophy advocates establishing stable centric stops, proper anterior guidance in harmony with jaw movements, disclusion of posterior teeth in protrusion, and non-interference of teeth during lateral excursions. The document provides guidelines for determining tooth contours and positions to achieve optimal function, stability, and aesthetics.
recent advances in impression materialsramkoti reddy
This document summarizes recent advances in dental impression materials. It discusses improvements made to alginate impression materials, including extended pour times, tray adhesives, reduced dust, and antimicrobial properties. It also describes advances in elastomeric materials like addition silicones, which provide highly accurate impressions with dimensional stability and short setting times. Digital impression systems offer advantages of speed and accuracy but also have limitations. Overall, the document outlines key properties desired in impression materials and new formulations that improve user experience and clinical outcomes.
Smear layer is a controversial topic in the field of operative dentistry and endodontics. This presentation includes composition, concepts, structure, advantages, disadvantages, and removal methods of smear layer.
Biofunctional prosthesis system complete dentureNikitaChhabariya
The document summarizes the Biofunctional Prosthetic System (BPS) for complete dentures. The BPS is a systematic approach that uses specialized trays, materials, and techniques from impression making to the final denture insertion. It aims to create dentures with optimal aesthetics, comfort, fit and function. The summary discusses the key steps of the BPS including primary and secondary impressions, jaw relation recording, tooth set-up using articulators, and injection molding of the final denture. Clinical examples are provided to illustrate the BPS approach.
This document discusses provisional restorations, including their definition, purpose, requirements, and fabrication methods. Provisional restorations are interim prostheses used for a limited time after tooth preparation until a permanent restoration can be placed. They protect the prepared tooth, maintain function and aesthetics, and allow the dentist to assess treatment. Ideal provisionals have biologic requirements like pulp protection and positional stability, mechanical requirements like strength and retention, and aesthetic requirements like color matching. They can be custom-made using various resin or metal materials or prefabricated. Direct, indirect, and combined fabrication techniques are described.
The document discusses various concepts related to complete denture impressions including definitions, techniques, materials and anatomical considerations. It defines key terms like preliminary impression, final impression, relief and supporting areas. It describes different impression techniques like mucocompressive, mucostatic and selective pressure. Factors affecting retention, stability and support of dentures are also summarized. The steps involved in making impressions are outlined which include examination, tray selection, border molding and the final impression.
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
Pathologic tooth migration (PTM) refers to tooth displacement resulting from a disturbance in factors that maintain normal tooth position. PTM is common in periodontal patients, with prevalence studies finding rates of 30-55%. The primary factor in PTM is periodontal bone loss resulting from periodontal disease. Other factors include occlusal changes from tooth loss, soft tissue pressures, oral habits, and periapical or gingival inflammation. Treatment involves periodontal therapy, sometimes with adjunctive orthodontics or prosthodontics, while prevention focuses on periodontal disease control and management of predisposing occlusal and habit factors.
This document discusses various treatment methods for temporomandibular disorders (TMDs). It separates treatments into definitive treatments, which aim to eliminate the underlying cause, and supportive therapies, which aim to manage symptoms. Definitive treatments include reversible occlusal appliances, irreversible occlusal therapies, relaxation techniques, and management of parafunctional habits. Supportive therapies include medications, physical therapies like ultrasound and manual techniques, and self-care methods. The document provides detailed descriptions and indications for different appliance types, including stabilization, anterior repositioning, and soft splints.
1. A tooth supported overdenture is a removable partial or complete denture that covers and receives support from one or more remaining natural teeth or dental implants.
2. It provides advantages like ridge preservation, improved retention, stability and support compared to conventional complete dentures.
3. Tooth supported overdentures can be classified based on the type of abutment preparation (coping vs non-coping) and the timing of placement (immediate, interim or definitive).
The document provides a historical perspective and current status of dental bonding agents. It discusses how bonding agents have evolved over generations from early calcium ion-based first generation agents with low bond strengths to today's multi-step etch-and-rinse and single-step self-etch adhesives. Current adhesives can achieve bond strengths of 20-50 MPa to enamel and 13-80 MPa to dentin. While newer single-step adhesives offer simplicity, their long-term performance is still being evaluated compared to multi-step systems. Proper technique remains important for clinical success with any bonding agent.
Impression materials and techniques in fpd /orthodontic courses by Indian den...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 document discusses various techniques for gingival retraction including mechanical, chemomechanical, and surgical methods. Mechanical methods include using a rubber dam or copper band to displace gingiva. Plain cord techniques involve pushing gingiva with cotton cords. Chemomechanical techniques combine chemical agents like epinephrine, aluminum sulfate gel, or ferric sulfate with cord packing to aid retraction and control bleeding. Selection of retraction materials depends on effectiveness, lack of toxicity, and minimal tissue damage.
This document discusses relining and rebasing procedures for complete dentures. It defines relining as adding material to the denture base to improve fit, while rebasing involves replacing the entire denture base. Relining is indicated when dentures lose adaptation due to ridge resorption. Closed mouth techniques take impressions with the teeth in occlusion, while open mouth techniques record a new bite relationship. Impression materials and lab procedures are also outlined. The goal of relining is to prolong the useful life of dentures by improving fit as the ridges change.
The document discusses various concepts of occlusion for fixed partial dentures, including bilaterally balanced occlusion, unilaterally balanced occlusion, and mutually protected occlusion. Bilaterally balanced occlusion aims for simultaneous contact on both sides but is difficult to achieve, while unilaterally balanced occlusion distributes forces to multiple teeth on the working side only. Mutually protected occlusion relies on anterior guidance to prevent posterior contact during excursive movements. The concepts vary in their distribution of forces and indications depending on a patient's needs.
Biologic width - Importance in Periodontal and Restorative DentistryDr.Shraddha Kode
The document discusses the biologic width, which refers to the dimensions of the soft tissue attached to the tooth coronal to the alveolar bone crest. It consists of the junctional epithelium, connective tissue attachment, and the sulcular depth, totaling approximately 2-3 mm. Violation of the biologic width by placing restorative margins too far subgingivally can lead to bone resorption, gingival recession, or hyperplasia. The document outlines techniques for assessing biologic width dimensions and various surgical or orthodontic procedures to correct violations. Maintaining at least 3 mm of distance from the restorative margin to alveolar bone is important for periodontal health.
This document discusses the management of patients with xerostomia (dry mouth) in prosthodontics. It defines xerostomia and lists its common causes such as medications, medical conditions, and radiation therapy. Signs and symptoms include dry mouth, mouth cracks, tongue burning, and taste alteration. Problems for denture patients include reduced retention and increased friction. Management involves symptomatic relief, addressing underlying causes, stimulating residual gland function, using saliva substitutes, encouraging hydration, and optimizing oral hygiene. Prosthodontic treatments aim to improve retention, stability, and comfort through techniques like using metal denture bases and soft liners. Frequent recalls are needed due to increased risk of denture
Composite Resin Luting cements (2nd edition) presentation powerpoint
A type of dental cement
Used for cementation of indirect restorations & brackets
A summary of five textbooks
journal club presentation on prosthodonticsNAMITHA ANAND
This study measured and compared the stress transmitted to implants from different attachments for mandibular implant overdentures. An edentulous mandibular model with implants in the canine regions was fabricated. Strain gauges attached to the implants measured stress under vertical pressure applied to the denture. A locator attachment transferred more stress to the working side implant than a bar/clip attachment. Stress on implants decreased as the denture base length was reduced. The bar/clip attachment distributed stress more evenly between working and non-working side implants.
Full mouth rehabilitation FINAL PRESENTATIONNAMITHA ANAND
This document discusses full mouth rehabilitation (FMR), including:
- Definitions of FMR as restoring form and function of the masticatory system to a normal condition.
- Goals of FMR include achieving a stable centric occlusion, even distribution of stresses, and equalization of forces.
- Indications for FMR include restoring impaired function, preserving remaining teeth, and improving esthetics.
- Classification systems for patients requiring FMR, including those with excessive wear with or without loss of vertical dimension.
- Diagnostic tools used in planning FMR, such as models, radiographs, bite records, and diagnostic wax-ups.
This document discusses concepts and techniques related to occlusal rehabilitation. It covers topics such as centric relation, anterior guidance, restoring anterior and posterior teeth, and solving various occlusion problems. The Pankey-Mann-Schuyler philosophy advocates establishing stable centric stops, proper anterior guidance in harmony with jaw movements, disclusion of posterior teeth in protrusion, and non-interference of teeth during lateral excursions. The document provides guidelines for determining tooth contours and positions to achieve optimal function, stability, and aesthetics.
recent advances in impression materialsramkoti reddy
This document summarizes recent advances in dental impression materials. It discusses improvements made to alginate impression materials, including extended pour times, tray adhesives, reduced dust, and antimicrobial properties. It also describes advances in elastomeric materials like addition silicones, which provide highly accurate impressions with dimensional stability and short setting times. Digital impression systems offer advantages of speed and accuracy but also have limitations. Overall, the document outlines key properties desired in impression materials and new formulations that improve user experience and clinical outcomes.
Smear layer is a controversial topic in the field of operative dentistry and endodontics. This presentation includes composition, concepts, structure, advantages, disadvantages, and removal methods of smear layer.
Biofunctional prosthesis system complete dentureNikitaChhabariya
The document summarizes the Biofunctional Prosthetic System (BPS) for complete dentures. The BPS is a systematic approach that uses specialized trays, materials, and techniques from impression making to the final denture insertion. It aims to create dentures with optimal aesthetics, comfort, fit and function. The summary discusses the key steps of the BPS including primary and secondary impressions, jaw relation recording, tooth set-up using articulators, and injection molding of the final denture. Clinical examples are provided to illustrate the BPS approach.
This document discusses provisional restorations, including their definition, purpose, requirements, and fabrication methods. Provisional restorations are interim prostheses used for a limited time after tooth preparation until a permanent restoration can be placed. They protect the prepared tooth, maintain function and aesthetics, and allow the dentist to assess treatment. Ideal provisionals have biologic requirements like pulp protection and positional stability, mechanical requirements like strength and retention, and aesthetic requirements like color matching. They can be custom-made using various resin or metal materials or prefabricated. Direct, indirect, and combined fabrication techniques are described.
The document discusses various concepts related to complete denture impressions including definitions, techniques, materials and anatomical considerations. It defines key terms like preliminary impression, final impression, relief and supporting areas. It describes different impression techniques like mucocompressive, mucostatic and selective pressure. Factors affecting retention, stability and support of dentures are also summarized. The steps involved in making impressions are outlined which include examination, tray selection, border molding and the final impression.
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
Pathologic tooth migration (PTM) refers to tooth displacement resulting from a disturbance in factors that maintain normal tooth position. PTM is common in periodontal patients, with prevalence studies finding rates of 30-55%. The primary factor in PTM is periodontal bone loss resulting from periodontal disease. Other factors include occlusal changes from tooth loss, soft tissue pressures, oral habits, and periapical or gingival inflammation. Treatment involves periodontal therapy, sometimes with adjunctive orthodontics or prosthodontics, while prevention focuses on periodontal disease control and management of predisposing occlusal and habit factors.
This document discusses various treatment methods for temporomandibular disorders (TMDs). It separates treatments into definitive treatments, which aim to eliminate the underlying cause, and supportive therapies, which aim to manage symptoms. Definitive treatments include reversible occlusal appliances, irreversible occlusal therapies, relaxation techniques, and management of parafunctional habits. Supportive therapies include medications, physical therapies like ultrasound and manual techniques, and self-care methods. The document provides detailed descriptions and indications for different appliance types, including stabilization, anterior repositioning, and soft splints.
1. A tooth supported overdenture is a removable partial or complete denture that covers and receives support from one or more remaining natural teeth or dental implants.
2. It provides advantages like ridge preservation, improved retention, stability and support compared to conventional complete dentures.
3. Tooth supported overdentures can be classified based on the type of abutment preparation (coping vs non-coping) and the timing of placement (immediate, interim or definitive).
The document provides a historical perspective and current status of dental bonding agents. It discusses how bonding agents have evolved over generations from early calcium ion-based first generation agents with low bond strengths to today's multi-step etch-and-rinse and single-step self-etch adhesives. Current adhesives can achieve bond strengths of 20-50 MPa to enamel and 13-80 MPa to dentin. While newer single-step adhesives offer simplicity, their long-term performance is still being evaluated compared to multi-step systems. Proper technique remains important for clinical success with any bonding agent.
Impression materials and techniques in fpd /orthodontic courses by Indian den...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 document discusses various techniques for gingival retraction including mechanical, chemomechanical, and surgical methods. Mechanical methods include using a rubber dam or copper band to displace gingiva. Plain cord techniques involve pushing gingiva with cotton cords. Chemomechanical techniques combine chemical agents like epinephrine, aluminum sulfate gel, or ferric sulfate with cord packing to aid retraction and control bleeding. Selection of retraction materials depends on effectiveness, lack of toxicity, and minimal tissue damage.
This document discusses various techniques for managing gingival tissues during restorative dental procedures. It covers fluid control, gingival assessment and treatment, and different retraction methods including mechanical, chemomechanical, and surgical approaches. Plain cotton cord, double cord, and chemomechanical techniques using epinephrine are described in detail. Selection criteria for retraction materials and the effects of various medicaments are also summarized.
Gingival retraction is the deflection of the gingiva away from the tooth to provide adequate access and an accurate impression of prepared tooth margins. Traditional methods include mechanical retraction using copper bands or temporary crowns filled with material, as well as chemomechanical retraction using cords impregnated with chemicals like aluminum chloride. Retraction cords are commonly used in single or double cord techniques to displace tissue laterally or vertically. Recent advances include gingival displacement foams and gels that are applied to the sulcus to control bleeding and allow for cord placement. Lasers can also be used to incise and cauterize tissue for retraction. The goal is effective retraction while minimizing trauma to the ging
This document discusses various techniques for gingival displacement during dental impressions. It describes mechanical methods like copper bands and matrices, as well as chemomechanical methods using retraction cords impregnated with chemicals like aluminum chloride. Newer injection techniques using materials like Expa-Syl that displace tissue mechanically while controlling bleeding are also covered. The benefits and drawbacks of each technique are assessed in terms of effectiveness, risk of trauma or tissue damage, and other factors. A variety of retraction cord designs, sizes and application methods are also outlined. The document emphasizes that proper gingival displacement is important for accurately recording finish lines and preparing high quality dental impressions.
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 gingival retraction and impression making techniques. It describes gingival retraction as deflecting or displacing the gingiva from the tooth to record the margins. Various gingival retraction methods are covered, including mechanical retraction cords, electrosurgery, and newer cordless techniques using materials like Expasyl and Magic Foam. Key steps for making good impressions are also outlined, such as selecting the proper tray and impression material and evaluating the resulting impression. The conclusion emphasizes choosing a gingival retraction method suited to the clinical situation while prioritizing tissue health and patient comfort.
This document discusses fluid control and gingival displacement techniques which are important for accurate impressions and cementation of restorations. It describes various methods for fluid control including cotton rolls, rubber dams, high and low vacuum suction, and antisialogogues. Methods for gingival displacement include mechanical techniques like rubber dams and retraction cords, as well as surgical methods like electrosurgery and lasers. Retraction cords work by both mechanically separating tissue and chemically providing hemostasis, while lasers provide benefits like hemostasis, reduced post-operative pain and less gingival recession. Mastering these techniques helps produce quality restorations with proper fit.
Gingival retraction is a necessary step for accurate impressions in fixed prosthodontics. There are various methods for gingival retraction including mechanical methods using retraction cords, chemicals applied to cords or directly to tissue, electrosurgery, lasers, and new cordless systems. Retraction cords come in different sizes and are placed for 5-30 minutes. Chemicals used include astringents like aluminum chloride that cause hemostasis and tissue displacement. New developments provide retraction without cords or chemicals but additional research is still needed on some techniques and materials. Proper gingival retraction allows for an accurate impression and fit of restorations for optimal function and health of surrounding tissues.
This document discusses various techniques for gingival tissue management during dental procedures. It describes physico-mechanical methods like wooden wedges and retraction cords that displace tissue laterally or apically. Chemico-mechanical methods involve treating retraction cords with chemicals like epinephrine to induce tissue shrinkage and control bleeding. Other methods discussed include electrosurgery, lasers, and recent advances like Magic Foam Cord and Merocel that provide atraumatic retraction. The goal of gingival tissue management is to displace soft tissues from the operating site for proper cavity preparation and restoration while avoiding damage to tissues.
This document discusses biological width, which refers to the combined width of connective tissue and epithelial attachment adjacent to a tooth above the alveolar bone crest. The biological width was found to be approximately 2.04mm on average. Maintaining the biological width is important for periodontal health. There are several factors that can impact the biological width, such as the location and finish of restorative margins, gingival displacement techniques, crown contours, and subgingival debris. Violations of the biological width can be evaluated clinically and radiographically. Various techniques exist to correct biological width violations, including surgical crown lengthening procedures and orthodontic extrusion methods.
This document discusses periodontal plastic surgery techniques. It begins by defining periodontal plastic surgery and outlining its goals of correcting anatomical deformities, increasing attached gingiva, and deepening shallow vestibules. It then describes various techniques for widening attached gingiva including free gingival grafts, free connective tissue grafts, and apically positioned flaps. Criteria for selecting mucogingival techniques include ensuring the surgical site is plaque-free and has adequate blood supply. The objectives of periodontal plastic surgery are to address problems associated with lack of attached gingiva and shallow vestibules. Key techniques are described for augmenting gingiva both apical and coronal to a ging
REFERENCES TAKEN FROM CARRANZA'S TEXTBOOK OF CLINICAL PERIODONTOLOGY AND LINDHE'S TEXTBOOK OF CLINICAL PERIODONTOLOGY AND IMPLANT DENTISTRY. CONTAINS ENOUGH AND MORE DETAILS OF THIS TOPIC FOR BDS STUDENTS.HOPE THIS PRESENTATION WILL HELP U GAIN SOME KNOWLEDGE ABOUT PERIODONTAL PLASTIC AND ESTHETIC DENTISTRY.
This document outlines the traditional and new concepts of apicectomy surgery. It begins with defining apicectomy as cutting the apex to access accessory canals and remove necrotic cementum. It discusses the anatomy, indications including teeth with failed root canals or procedural errors, and contraindications. Procedure types include traditional periapical surgery with apicoectomy and retrograde/orthograde filling or apicocurettage. The document also covers endodontic microsurgery techniques and advantages as well as new concepts like improved suturing and the use of lasers like Erbium-YAG for incisions and bone/tissue removal. Retrograde fillings discussed include amalgam, zinc oxide, and
This document discusses various methods for gingival retraction during the fabrication of fixed partial dentures. It defines gingival retraction as deflecting the marginal gingiva away from a tooth, which is important for accurate impressions. Methods discussed include mechanical retraction cords soaked in chemicals, rotary gingival curettage, and electrosurgery. The document provides details on techniques, effectiveness, and risks/considerations for each approach.
This document discusses various methods for gingival retraction to expose the tooth structure beneath the gingiva. It describes mechanical, chemico-mechanical, and surgical retraction methods. Mechanical methods include use of retraction cords, while chemico-mechanical methods involve chemically-treated cords to shrink gingival tissue. Recent advances discussed include laser retraction and cordless techniques like Expasyl paste that cause less trauma than cords. Proper technique and material selection are important to effectively retract tissue without damaging the periodontium.
The document discusses recent advances in prosthodontics presented by Dr. J. Koshy Joseph. It covers various topics including complete dentures, fixed partial dentures, removable partial dentures, maxillofacial prosthetics, implantology, materials and instrumentation. New techniques and materials discussed include the use of lasers in denture fabrication, CAD/CAM systems for complete dentures, magnets and denture liners in prosthodontics, and all-on implants. The document provides an overview of the latest developments across different areas of prosthodontics.
This document provides instructions for making final impressions for complete dentures, including custom tray fabrication, border molding techniques, and using selective pressure to record tissues in an undisplaced position. It describes areas that require special attention for the maxillary and mandibular impressions, such as the posterior palatal seal and retromylohyoid space. The goal is to make impressions that provide maximum coverage, close adaptation, and proper support and retention for the dentures.
Here is the updated list of Top Best Ayurvedic medicine for Gas and Indigestion and those are Gas-O-Go Syp for Dyspepsia | Lavizyme Syrup for Acidity | Yumzyme Hepatoprotective Capsules etc
ABDOMINAL TRAUMA in pediatrics part one.drhasanrajab
Abdominal trauma in pediatrics refers to injuries or damage to the abdominal organs in children. It can occur due to various causes such as falls, motor vehicle accidents, sports-related injuries, and physical abuse. Children are more vulnerable to abdominal trauma due to their unique anatomical and physiological characteristics. Signs and symptoms include abdominal pain, tenderness, distension, vomiting, and signs of shock. Diagnosis involves physical examination, imaging studies, and laboratory tests. Management depends on the severity and may involve conservative treatment or surgical intervention. Prevention is crucial in reducing the incidence of abdominal trauma in children.
TEST BANK For Community Health Nursing A Canadian Perspective, 5th Edition by...Donc Test
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Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
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O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
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Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
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3. INTRODUCTION
Gingival Retraction is deflection of the marginal gingiva away froma
tooth.
Its is a process of exposing margins when making impressionof
prepared teeth.
Impression making is technique sensitive because accurate reproduction
of the finish line is essential for the fabrication of the cast restoration
Hence it is necessary to retract the gingival sulcus prior to impression
making
4. NEED FOR GINGIVALRETRACTION
Contour of the future restoration
Patient’s comfort
Efficiency of impression material
Operators access and visibility
5. “RETRACTION” is the downward and outward
movement of the free gingival margin
“RELAPSE” is the tendency of the gingival
cuff to go back to its original position.
“DISPLACEMENT” is a downward
movement of the gingival cuff that is caused by heavy-
consistency impression material bearing down on
unsupported retracted gingival tissues.
“COLLAPSE” is the tendency of the
gingival cuff to flatten under forces associated with the
use of closely adapted customized impression trays
Gingival Retraction Techniques for Implants vs Teeth.
Bennani V
,Schwass D, Chandler N. J Am DentAssoc.2008;139:1354-63.
6. VARIOUS PHASES IN GINGIVAL DISPLACEMENT
During tooth preparation (Preparatory phase ) :-
plan the position of the cervical finish line in relation to the gingiva prior to tooth
preparation.
The gingiva must be displaced to give a clear view of the cervicalarea
During impression making ( working phase ) :-
An adequate access to the finish line should be obtained after tooth preparation is
done.
This displaces the gingiva apically and laterally to provide space for the impression
material to flow and record details.
During Cementation of Restoration (Maintenance phase ):-
The gingiva adjacent to the finish line must be displaced prior to cementation to
evaluate marginal fit and also to remove excess cement after cementation
7. CRITERIA FOR SELECTION OF AGINGIVAL
RETRACTION MATERIAL
According to Milford B.Reiman (1976), the gingival retraction material must
be effective enough to create a trough, free of blood and fluids and there must
be no damage to the gingiva in terms of inflammation or bleeding.
The resulting contours of the tissues must be predictable and tissue must recover
in a considerable period of time with minimal systemic or localized effects.
8. There are three criteria that must be satisfied by a gingival retraction
material:
- It should be effective in gingival retraction and achieve hemostasis
if necessary.
- There should be absence of systemic effects.
- No irreversible damage to gingival tissues with the material selected.
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd Edition
11. Biological width
About 2.04mm ---- 1.07
con.tissue & 0.97 epth.attach
Placement of restoration should
not encroach this space.
12. Evaluation of biological width
Clinically - distance between
bone and restorative margin
Probe is pushed through the
anesthetised attachments
< 2mm - violation of biological
width
14. Margin placement guidelines
Should be placed in the sulcus not in the attachment
Shallow probing depth (1-1.5mm) - preparation should extend only
0.5mm
> 1.5mm - 1/5th the depth of the sulcus below the crest
> 2mm - perform gingivectomy
Deeper the gingival sulcus - greater the risk of gingivalrecession
18. 1.Rubber dam
It was introduced by S. C. Barnum (1864) , it produces retraction by
compression and is used when a limited number of teeth in one quadrant have
been prepared.
• Heavy weight rubber dams were used..
• Advantages
control of seepage and hemorrhage.
ease of application.
• Disadvantages
full arch models cannot be made.
severe cervical extension preparations.
19. Limitations :
Should not be used with polyvinyl siloxane impression material,
because the rubber dam will inhibit its polymerization.
Cannot be used to record subgingival preparation.
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd Edition
20. 2.Copper Band
The copper band acts as a means of
carrying the impression material and a
mechanism for gingival retraction.
Disadvantage :
Incisional injuries to gingival tissues
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd Edition
21. Technique:-
Selection of copper band.
One surface of band may be perforated.
Cervical end of the band may be trimmed in accordance with the
finish line.
The band is filed with soft wax and seated on the tooth.
The wax is chilled and impression is removed.
The impression indicates over extension of the band.
Adjustments if required may be made and second trial impression is made.
22. The wax is melted and modelling compound is introduced.
Incisal or occlusal end gingival end
Seat the band securely into its position.
Pressure is applied on the compound directly.
Chill the impression.
A towel clamp may be used to remove the impression.
23.
24. 3. Cotton Twills With ZnoE Cement
• Employs gentle pressure over a period of time.
• ZnoE mixed into creamy consistency, Cotton twills are rolled into
this mass and then on a towel to gain compactness.
• This Prevents sticking of pack to the instruments and gives ease
in handling.
• Should reflect the tissue laterally.
• Pack held in place with fast setting ZnOE cement.
25. 4.GINGIVAL CORD TECHNIQUE
It physically pushes the gingiva away from the finish line.
Its effectiveness is limited because pressure alone will not control sulcular
haemorrhage.
26. CLASSIFICATION OFCHORDS
Depending on the configuration
Plain
Twisted
Braided or Knitted
Depending on the surface finish
Waxed
Unwaxed
Depending on the chemical treatment
Plain
Impregnated
28. Depending on the number of strands
• Single
• Double
Depending on the thickness (colour coded)
o Black 000
o Yellow 00
o Purple 0
o Blue 1
o Green 2
o Red 3
29. OTHER MATERIALS USED FOR PLAIN CORD TECHNIQUE
Nylon and polyester can be used for plain cord gingival retraction technique.
Cotton can also be used in conjunction with nylon and polyester.
Plain cotton cord yields maximum absorption capacity amongst all. The
diameter of these cords can range from 0.58-1.17mm.
31. FORCE REQUIRED WHILE PLACING THE CORD INTO THE
GINGIVAL SULCUS
Epithelial attachment resistance:1 N/mm²
Pressure exerted in periodontal probing:1.31- 2.41N/mm²
Pressure exerted to insert the cord: 2.5-5 N/mm²
Hence for a marginal gingival opening of 0.5 mm in adults, requiers a
pressure of 0.1 N/mm² .
Barendregt DS. Van Der Velden U. Reiker L. Loos BG.
Journal of Clinical Periodontology 2001
33. SINGLE CORD TECHNIQUE
••Simplest & least traumatic technique
••Indications
- when gingival tissue are healthy & do not bleed.
- For making impressions for 1 to 3 prepared teeth.
Procedure :-
Isolate the quadrant
Suitable length / diameter of cord selected.
Dip the cord in astringent solution and squeeze out the excess with gauzesquare
Push cord between tooth & gingiva on mesial aspect
Continue packing on lingual, distal & buccal aspects.
Leave 2 mm of cord in excess
Kept in place for 10 min
Krammer et al;DCNA 2004
34.
35.
36. DOUBLE CORD TECHNIQUE
Indication - gingival inflammation, increased hemorrhage.
Disadvantage - healing & re-attachment - unpredictable.
Procedure :
• An extra thin esp. # 00 size (0.3 mm dm) - placed
0.5 mm below finish line for 5 min;
• 2nd larger diameter impregnated cord is placed above
it for 8-10 mins for hemostasis.
• The 2nd cord is removed just before the impression is injected.
• 1St cord removed after temporization & cementation- to remove any
residual impression material in sulcus.
Krammer et al;DCNA 2004
37.
38.
39. Advantages:
Accurate and precise impression can be achieved showing the finish line clearly.
No chemical substances added to the sulcus.
Drawbacks of Retraction Cord technique
Risk of epithelial attachment injury.
Painful procedure requiring preventive anaesthesia.
It is technique sensitive.
Bleeding and seepage may occur.
Risk of irreversible gingival retraction.
40. CHEMICO-MECHANICALTECHNIQUE
Combining chemical action with pressure packing of the retraction cord.
Enlargement of gingival sulcus as well as control of fluids seeping from the walls
of the gingival sulcus cab be achieved.
Caustic Chemicals tried earlier:
Sulfuric acid
Trichloroacetic acid
Negatol (45% condensation product of meta cresol sulfonic acid and formaldehyde)
Zinc Chloride
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd Edition
41. EFFECT OF THESEMEDICAMENTS:
Effective in shrinking the gingival tissues.
Zinc chloride is caustic and prolonged application or highconcentrations
cauterizes the tissue.
Negatol is highly acid and decalcifies the teeth.
An evaluation of the drugs used for gingival retraction. Woycheshin FF.
J of Prosthet Dent. 1964;14: 769-76
42. CHEMICALS USED ALONG WITH CORD
Hemostatic agents
ferric sulphate
Astringents { cause tissue contraction }
aluminium chloride
Aluminium sulphate
Vasoconstrictor
Epinephrine
43. EPINEPHRINE
Epinephrine (8%) has been documented as gingival retraction agent in 1980s
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd
Edition.
44. Advantages of epinephrine :
Effectiveness in gingival displacement
Haemostasis
Absence of irreversible damage to gingiva
Disadvantages of epinephrine :
‘Epinephrine Syndrome’
Tachycardia
Rapid respiration
Elevated blood pressure
Anxiety
Postoperative depression
45. Contraindications of Epinephrine :
CVS Disease
Hypertension
Diabetes
Hyperthyroidism
Known Hypersensitivity to epinephrine
Patients on, Ganglionic Blockers or Epinephrine potentiating drugs
48. INFUSION TECHNIQUE
specialized instrument called a dento infusor is used to apply 15% or 20% ferric
sulphate in the sulcular area.
done with firm pressure with burnishing action.
cord is dipped in the ferric sulphate solution and packed into thesulcus.
left in the sulcus for 1 to 3 minutes
51. AMOUNT OF ABSORPTION OFMEDICAMENT
DEPENDS ON:
Exposure of the vascular bed
Length and concentration of the impregnated cord
Length of time of application
Donovan TE, Gandara BK, Nemetz H.
Review and survey of medicaments used with gingival retraction cords. J Prosthet
Dent. 1985;53:525-31.
53. ROTARY GINGIVALCURETTAGE
“Gingitage” or “Denttage”
Concept put forward by Amsterdam (1954)
Developed by Hansing and Ingraham
“Troughing technique”, the purpose of which is to produce limited removal
of epithelial tissue in the sulcus while a chamfer finish line is being created
in tooth structure
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd Edition.
55. CRITERIA FOR GINGIVALCURETTAGE:
Must be done on healthy and inflammation free tissue to prevent tissue
shrinkage that occurs when diseased tissue heals.
Absence of bleeding on probing.
Sulcus depth less than 3.0 mm.
Presence of adequate keratinized gingiva.
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd Edition.
56. Procedure
In conjunction with axial reduction, a shoulder finish line is prepared at
the level of the gingival crest with a flat end tapered diamond.
Then a tapered diamond of 150 – 180 grit is used to extend the finish
line apically, one half to two thirds the depth of the sulcus converting the
finish line to a chamfer. Cord impregnated with aluminium chloride or alum is
gently placed to control hemorrhage and is removed after 4 – 8 minutes.
Disadvantages:
Poor tactile sensation when using diamonds in sulcular walls, can cause
deepening of the sulcus.
The technique also has the potential for destruction of periodontium if used
incorrectly.
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd Edition.
57. ELECTROSURGERY (OR) SURGICAL DIATHERMY
Electrosurgery unit is a high frequency oscillator or radio transmitter
that uses either vaccum tube or a transistor to deliver a high
frequency electrical current of at least 1.0MHz.
History:
1891- Arsonval and Telsa: found that electricity at high
frequency can be passed through a body without producing a shock
or muscular response .
1924- William Clark: used dessication current for removal of
carcinomatous growths. He was known as father of American
Electrosurgery.
58. Principle:
Experiments of d’Arsonvol (1891) demonstrated that
electricity at high frequency can pass through a body without
producing a shock (pain or muscle spasm), producing instead an
increase in the internal temperature of the tissue.
eventual
Surgical
This discovery was used as the basis for
development of electrosurgery. It is also known as
Diathermy.
59. Mechanism of Action:
Controlled tissue destruction
Current flows through a small cutting electrode
Producing high current density and rapid temperature rise
Cells directly adjacent to electrode are destroyed due to temperature increase
The circuit is completed by contact between the patient and a ground
electrode
60.
61. TYPES OF CURRENT
Fully Rectified current (modulated)
continuous flow of current
good cutting characteristics
enlargement of gingival sulcus
Fully Rectified current (filtered)
continuous current wave
excellent cutting characteristics
less injury than modulated current
62. Partially rectified current (damped)
Considerable tissue destruction
Slow healing.
Used for spot coagulation
Unrectified current (damped)
Recurring peaks of current that rapidly diminish
Causes intense dehydration and necrosis
Slow and painful healing
Not used in dental surgery
63. SURGICAL ELECTRODES
Similar to a probe
Designed to produce intense heat during surgical procedure
and it can fit into the electro surgical hand piece.
This heat helps to vaporize the target tissue.
It comprises of the shank and cutting edge
64. Cutting Edge Designs Are:-
A) Coagulating probe
B) Diamond loop
C) Round loop
D) Small straight probe
E) Small loop
66. ELECTRO SURGERYTECHNIQUE
STEPS:
Anesthetize the area
Apply peppermint oil, at the vermilion border of lip
Check the equipment setting
Cutting electrode should be applied with very light pressure and quick, deftstrokes
Electrode should move at a speed of no less than 7mm/second
67. If it is necessary to retrace the path of a previous cut, 8 – 10 seconds
should be allowed to elapse before repeating the stroke.
Proper technique with the cutting electrode can be summed up in three
points:
Proper power setting
Quick passes with the electrode
Adequate time intervals between strokes
68. Advantages:
Clear operating area without or no bleeding.
Healing by primary intension.
Lack of pressure to incise tissue.
less tissue loss after healing
Disadvantages:
Unpleasant odour.
Slight loss of crestal bone
Burn mark on the root surface.
Not suitable for thin gingiva.
69. Adverse healing response
Heat is generated in tissues adjacent to electrosurgical incision
Alveolar bone is extremely sensitive to heat
Greater injury occurred after heating to 530C for aminute
Heating to 600C or more resulted in obvious bone tissuenecrosis
Theoretical upper limit is 560C, since alkaline phosphatase is known to denature at
this temperature.
Heat generated depends on
Waveform of the electrical current
Duration of current application
Power of the active tip electrode
Electrode size
Depth of electrode penetration
70. Contraindications
Should not be employed on patients with cardiac pace maker
Should not be used in the presence of flammable agents
There is slight danger with the use of nitrous oxide with electrosurgery.
Shillinburg HT. Fundamentals of Tooth Preparation. 3rd Edition
71. GINGIVALSULCUS ENLARGEMENT
To enlarge gingival sulcus, a small, straight or J-shaped electrode is selected. It is
used with wire parallel to the long axis of the tooth.
If the electrode is maintained in this direction the loss of gingival height will be
about 0.1mm.
Probe is run at a speed of 7mm per second to avoid lateral heat dissipation
74. REMOVAL OF AN EDENTULOUSCUFF
Frequently the remnants of the interdental papilla adjacent to an edentulous
space will form a roll or cuff that will make it difficult to fabricate a pontic
with cleanable embrasure and strong connectors.
A large loop electrode is used for planning away the large roll of tissues.
75. CROWN LENGTHENING
There are circumstances in which it may be desirable to have a longer
clinical crown on a tooth than is present.
If there is sufficiently wide band of attached gingiva surrounding the tooth,
this can be accomplished with a clinical crown lengthening (gingivectomy)
using a diamond electrode.
When surgery leaves an extensive post-operative wound as in this case, it is
necessary to place a periodontal dressing, which should be changed in about
7 days.
78. LASER RETRACTION
Compared with other retraction techniques, diode lasers with a wavelength of
980 nanometers and neodymium: yttrium-aluminum-garnet(Nd:YAG) lasers
with a wavelength of 1,064 nm are less aggressive, cause less bleeding and
result in less recession around natural teeth (2.2% vs 10.0%)
79.
80. Application of Nd: YAG laser provides faster healing with less haemorrhage
and less inflammatory reaction.
In conclusion it was evident that pulsed laser is a surgical device increasingly
important to dentistry.
82. CHEMICALS WITH AN INJECTIONABLE
MATRIX : EXPASYL TECHNIQUE
Non-cord gingival retraction system
Green colored paste in glass cartridges similar to anestheticcartridges
Metal dispenser is used to express the paste through a disposable metal dispensing tip
into the gingival sulcus prior to impression making or cementation
83. Visco-plastic product calculated to exert a stabilized pressure of
0.1N/mm².
The pressure depends on the viscosity of the product and on the speed
of the injection.
It is left in the place for 1-2 minutes and removed by rinsing.
Hemostasis is achieved by aluminum chloride.
Body is provided by kaolin and clay.
84. Principle of Expasyl Technique:
A paste product injected into the sulcus exerts a pressure of 0.1N/mm².
This pressure is too low to damage the epithelial attachment, but
sufficient to obtain a sulcus opening of 0.5mm for 2 minutes.
87. Advantages:
Effectively achieves hemostasis
Little pressure – atraumatic
Less time consuming
Color makes easy to see
Easy removal
Easy to dispense with the gun
Disadvantages:
Expensive
Thickness of the paste makes it difficult to express into the sulcus.
Metal tips too big for interproximal areas
Tissue should be dried before placement
88. MAGIC FOAM CORD
non-hemostatic gingival retraction system Coltène/Whaledent.
expanding vinyl polysiloxane material
less time-consuming
89. Magic Foam Cord
Magic FoamCord is reportedly the first expanding vinyl polysiloxane material
designed for retraction of the gingival sulcus without the potentially traumatic
and time-consuming packing of retraction cord.
It is a non-traumatic method of temporary gingival retraction with easy and fast
application directly to the sulcus .It is not aimed to achieve hemostasis.
90. Procedure
Magic FoamCord material is syringed around the crown preparation margins
and a cap (Comprecap) is placed to reportedly maintain pressure.
After five minutes, the cap and foam are removed and the tooth is ready for the
final impression.
94. Clinical significance
When the cavity preparation extends into the subgingival area asin
class II and class V cavity preparartion.
Aesthetics, while placing crown it should stay 0.5mm into ginigival
sulcus.
Enhancing the retention: if crown is smaller, restoration is to beplaced
after increasing crown length after gingivalsurgery.
Gingival overgrowth hindering operative procedure.
Control gingival hemorrhage during operativeprocedure
95. CONCLUSION
The accuracy of the impression taken in the prosthetic area is
extremely important both for the health and the aesthetics of
the treated patients. The offered techniques should be
patient-based and applied whenever the individual treatment
necessitates, or allows it.