final impressions
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The document discusses various materials that can be used for final impressions for complete dentures, including their properties and suitability. It recommends polyvinyl siloxane as the material of choice due to its dimensional stability, elastic recovery, and dimensional accuracy. It provides steps for taking a final impression with polyvinyl siloxane, including border molding, custom tray preparation, tissue manipulation during the impression, and evaluating the resulting impression.
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This document describes the process for making complete dentures, including taking final impressions, border molding, and constructing the denture bases. Key steps involve:
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2) Marking landmarks like the hamular notch on the impressions to indicate where to place the post dam.
3) Constructing denture bases by packing acrylic resin onto the master casts and curing.
4) Trimming and finishing the denture bases once set.
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A 3mm wax spacer is applied to the model and a tray is made over it. When the wax is boiled away, it leaves space for impression material. For an upper partial denture tray: apply wax spacers tightly, add tray material and cure it, then boil away the wax to create space. For a lower partial denture tray, follow the same process. For an upper partial implant case tray, add wax blocks over implants and cut windows to allow analogues to protrude through the finished tray.
Finished complete denture impression presentation final modification
This document provides information on making complete denture impressions. It defines an impression as the negative form made of oral tissues using a plastic material. A complete denture impression captures the entire denture bearing area of an edentulous mouth. Preliminary impressions are used for diagnosis and tray construction, while final impressions make master casts for denture fabrication. Key objectives of impressions are preservation of ridges, stability, support, esthetics and retention. The document outlines techniques for primary maxillary and mandibular impressions using stock trays and high viscosity materials like alginate or impression compound. Common errors in impressions include gaps, excess material, shallow sulci and visible tray edges. Corrections involve adding material or remaking impressions.
Viscoelastic and Elastic Properties of dental materials dashpot and spring h...
The document discusses various aspects of material hardness. It describes several methods for measuring hardness, including Vickers, Knoop, Brinell, and Rockwell tests. It explains that hardness is a material's resistance to plastic deformation and penetration. The document also discusses the relationship between hardness and yield strength, as well as elasticity versus plasticity. It provides examples of using hardness models, like the Maxwell model, to understand the behavior of elastic materials under loads.
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The document provides information on various dental impression materials, including their history, composition, properties and uses. It discusses early materials like beeswax and impression compounds. It also covers alginate, which is the most widely used material due to its ease of use. Other elastic materials discussed include polysulfide, which was the first synthetic elastomer, and condensation silicone. The ideal properties of impression materials and their classifications are also outlined.
rigid impression materials dental material
The document discusses impression materials used in dentistry. It describes the process of making impressions and casts, as well as ideal requirements for impression materials. It classifies impression materials based on mechanical behavior, setting mechanism, and usage. Rigid impression materials like plaster, impression compound, and zinc oxide pastes are described. The properties, composition, setting reactions and uses of plaster, impression compound and zinc oxide pastes are summarized.
Nonvital pulp therapy in pediatric dentistry
The document discusses techniques for pulpectomy procedures in primary teeth. It describes removing necrotic pulp tissue from the root canals and coronal portion of teeth to maintain the tooth. Key steps include isolating the tooth, removing caries, accessing and cleaning canals, drying canals, and filling canals with zinc oxide eugenol. The goals are to resolve infection, show healing on x-rays, and allow normal resorption and eruption of permanent teeth.
11.complete denture wax‐up and flasking procedure
This document discusses the process of waxing up dentures and flasking them for acrylic resin processing. It describes criteria for waxing the upper and lower dentures, including contouring the wax base and arranging the teeth. The flasking process involves investing the wax dentures and casts in dental stone in a flask, followed by wax elimination and packing of the flask with acrylic resin. The flask then undergoes polymerization cycling by heating in a water bath to cure the resin into the final denture bases.
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Finished complete denture impression presentation final modification
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Similar to final impressions
final impressions anas laheq
1. Polyvinyl siloxane is the material of choice for final impressions due to its dimensional stability, elastic recovery, and dimensional accuracy.
2. After border molding, the wax spacer is removed without dislodging the border molding. Holes are placed in custom trays to allow release of hydraulic pressure during the impression.
3. The final impression technique involves drying tissues, seating the tray from front to back while ensuring proper centering and orientation, and having the patient perform various movements to manipulate tissues.
Relining and rebasing
description about the relining and rebasing, its indications and contraindications, preparatory phases, various techniques with its advantages and disadvantages and laboratory procedures
Apexification and Apexogenesis
The presentation features the pulp reparative and regenerative procedures which can be carried out in immature teeth. It involves development of mature tooth from an immature one by root formation and root fixation as a preparatory phase for root canal treatment.
Temporization/provisional restoration
This document discusses the process and requirements of temporization, which is an important step in preparing fixed partial dentures. There are biological, mechanical, and aesthetic requirements that must be met. The summary discusses the different types of provisional restorations, including custom made vs prefabricated, short term vs long term use, and fabrication techniques like direct, indirect, or direct/indirect methods. A variety of materials can be used including acrylics, composites, and metals. The document also notes some limitations of provisional restorations like lack of strength, poor fit, and poor wear resistance.
6. secondary imp materials
This document discusses secondary impression materials used in fixed prosthodontics. It defines an impression as a negative reproduction of prepared teeth that provides information to fabricate a crown or fixed prosthesis. Impressions can be physical materials or digital scans. Physical impressions include reversible hydrocolloid, condensation silicone, polysulfide, polyether, and addition silicone. Digital impressions involve directly scanning teeth or an indirect scan of a dental cast. Custom trays are often used to carry and confine impression materials. Trays should be rigid, dimensionally stable, and provide adequate space for materials. The document outlines techniques for fabricating custom trays using autopolymerizing or light-cured resin. Good impressions accurately record all prepared surfaces
Lab procedures in complete denture prosthodontics/ dental education in india
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.
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.
Secondard impression materials
This document discusses secondary impression materials used in fixed prosthodontics. It defines an impression as a negative reproduction of prepared teeth that provides information to fabricate a crown or fixed prosthesis. Impressions can be physical materials or digital scans. Physical impressions include reversible hydrocolloid, condensation silicone, polysulfide, polyether, and addition silicone. Custom trays are often used and are fabricated from autopolymerizing or light-cured resin. Ideal impressions accurately record all prepared surfaces and maintain dimensional stability until the laboratory casts are made.
Impression in Complete Denture
Useful for prostho treatment.
Mainly for final yr.
In the case of complete denture.
For Aesthetic use.
Introduction.
Definitions.
Basic requirement of an impression making.
Principles of an impression making.
Objectives of an impression making.
Anatomical landmarks.
Classification of an impression making.
Steps in making an impression.
Impression :-
A negative likeness or copy in reverse of the surface of an object, an imprint of the teeth and adjacent structures for use in dentistry
(GPT8)
An impression can also be defined as an imprint of the teeth and adjacent structures for use in dentistry.
(GPT 4)
Laminates Veneers in Dentistry
The document provides an overview of esthetics with veneers. It discusses the definitions, history, indications and contraindications of veneers. It describes the processes of shade selection, tooth preparation including principles, rationale and types of preparation. It also discusses provisional restorations, cementation, maintenance and failures of veneers. Recent advancements discussed include feldspathic, lithium disilicate and minimally invasive veneers. In conclusion, veneers are a conservative treatment for improving aesthetics when done according to principles of preparation, cementation and maintenance.
Special impression techniques/ dentistry dental implants
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.
Impression materials
impression materialsplay an important role in dentistry so here is the basic information about various materials used in dentistry
AURICULAR PROSTHESIS (SEMI 3).pptx
This document discusses the fabrication process of an auricular prosthesis. It begins with definitions of maxillofacial prosthetics and discusses the objectives and advantages/disadvantages of auricular prostheses. It then outlines the full process of fabrication including taking an impression, creating a working cast, sculpting a wax pattern, investing and creating a mold, processing the prosthesis with silicone, applying color, and retaining the prosthesis. The overall goal is to restore esthetics, function, and improve the patient's psychological well-being using prosthetic replacement of missing ear structures.
Fabrication of Complete Denture.pptx
Complete dentures are removable dental prosthetics that replace all teeth and associated structures in the upper and lower jaw. They are made to restore mastication, aesthetics, and phonetics. The denture has 3 surfaces - impression, occlusal, and polished. It consists of a denture base, flange, border, and artificial teeth. The denture making process involves taking impressions, jaw relations, try-in, processing, curing, finishing, and insertion. Patients may experience pain, discomfort with eating or speech initially but can adapt with time. Proper cleaning is important for denture care.
Lab procedures in complete denture prosthodontics/prosthodontic courses
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
Vibhor impression in rpd
Vibhor Tyagi presented on impression materials and procedures for removable partial dentures. The presentation covered classification of impression materials including rigid, thermoplastic and elastic materials. Specific elastic materials discussed included reversible and irreversible hydrocolloids, polysulfide and polyether impressions. Techniques for maxillary and mandibular impressions were outlined. Special impression procedures for edentulous ridges including functional, McLean's, Hindel's and fluid wax methods were also presented. The importance of custom trays, border molding and selective pressure techniques were emphasized for accurate impressions.
Final impression CD
The document discusses the process of making final impressions for dentures. It begins by defining an impression and outlining the objectives and ideal qualities of an impression. It then describes the steps involved, from diagnosis to making the final impression. Specific techniques for custom tray fabrication, border molding, and taking the final impression are explained. Considerations for special clinical situations and factors that can complicate the impression process are also covered.
Impression procedures comlete denture/dental courses
This document discusses various techniques for making impressions for complete dentures, including the principles, materials, and procedures for primary and secondary impressions. The key techniques described are the conventional two-stage procedure using alginate for the primary impression and zinc oxide eugenol for the secondary, as well as the closed mouth technique using a low-viscosity material to capture functional movements. Selective pressure is also summarized as a combination of maximum coverage with minimal pressure on movable tissues.
Atraumatic Restorative Treatment ART
This document provides an outline and overview of Atraumatic Restorative Treatment (ART). It defines ART as a caries removal and restoration technique that does not require water or electricity. Key points:
- ART involves manually removing decayed tissue with hand instruments until maximum decay is removed. A highly dense glass ionomer cement then seals the cavity.
- ART was developed as an alternative for outreach situations but is now commonly used in private dental offices worldwide. It uses only a few basic hand instruments and is less technique sensitive than traditional drills.
- Advantages include being non-invasive, low-cost, and effective for treating root caries, medically compromised patients, and fearful children. Long
removable-partial-denture-f-f.pptx
This document discusses the construction and design of removable partial dentures (RPDs). It begins by outlining treatment options for edentulous spaces, including fixed bridges, complete dentures, transitional dentures, and implant-supported prosthetics. It then describes the process of constructing an RPD, including taking impressions, designing the framework with saddles, connectors, and retainers, investing and casting the metal framework, setting teeth, and finishing the acrylic. Key aspects like support, retention, and combining RPDs with fixed prosthetics are also summarized.
Impression procedures / implant dentistry course/ implant dentistry course
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,
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Lab procedures in complete denture prosthodontics/ dental education in india
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final impressions
- 1. Final Impressions for Complete Dentures
- 2. Potential Impression Materials • Irreversible Hydrocolloid – Hydrophilic but viscous – Stock tray distorts vestibular tissues
- 3. Potential Impression Materials • Zinc oxide & eugenol – Fast set – Rigid (undercuts difficult), – Poor taste
- 4. Potential Impression Materials • Polysulfides – Poor taste – Poor dimensional stability – Poor elastic recovery
- 5. Potential Impression Materials • Silicones – Addition reaction – Acceptable taste – Dimensionally stable – Elastic recovery
- 6. Potential Impression Materials • Polyethers – Poor taste – Dimensionally stable – Elastic recovery – Expensive
- 7. Polyvinyl Siloxanes Addition Reaction Silicone • Hydrophobic • Newer materials more hydrophilic – Similar to Polysulfides & Polyethers • Flow – Thixotropic – Require pressure to flow
- 8. Polyvinyl Siloxanes Addition Reaction Silicone • Good dimensional stability • Excellent elastic recovery • Excellent dimensional accuracy • Material of choice
- 9. Wax Spacer Removal • After border molding, remove wax spacer • Do not dislodge border molding
- 10. Custom Trays • Smooth sharp surfaces of border molding or tray
- 11. Effect of Sharp Borders
- 12. Custom Trays • Place holes in tray to allow release of hydraulic pressure
- 13. Adhesive • Paint inside of tray & border molding • Allow to dry 7-15 minutes
- 14. Final Impressions • Dry tissues with 2x2 gauze folded in cotton pliers
- 15. Tissue Rest • Leave dentures out 24 hours – Tissue recovery • Use low viscosity polyvinyl siloxane material – Use adhesive
- 16. Final Impressions • Enough material to replace wax spacer • Load quickly - viscosity • Avoid bubbles when loading tray
- 17. Final Impressions • Cover all border molding with impression material
- 18. Tray Insertion • Insert side of tray against commissure of mouth & rotating the tray into place while pulling outward on the commissure of the contralateral side
- 19. Final Impressions • Seat tray front to back - use gauze over holes in tray • Ensure tray is centered & properly oriented Subsurface Voids Subsurface Voids Tech. Tech. Dentist Dentist A A B B C C TOTAL TOTAL F-B 2 1 6 F-B 3 3 2 1 6 Even 4 3 6 13 Even 4 3 6 13 B-F 6 4 3 13 B-F 6 4 3 13 __________________________ __________________________ TOTAL 13 TOTAL 13 9 9 10 10 32 32
- 20. Tissue Manipulation Maxilla • Slight manipulation of cheeks, lips • Patient moves mandible to side to side for maxillary impression
- 21. Tissue Manipulation Mandible • Hold tray in position & have patient: – Pucker lips – Lift & move tongue forward & side to side
- 22. Impressions Videos Final Impressions Two Mirror Impression Technique
- 23. Set Time • Most polyvinyl siloxane materials set within 6 minutes
- 25. Evaluation of Borders • Material should not be more than l mm thick over border molding (otherwise it was not fully seated)
- 29. Post-palatal Seal • Compensates for polymerization shrinkage away from palate • Enhances retention
- 30. Post-palatal Seal • Mark post-palatal seal with indelible stick – Glandular area & vibrating line • Place impression in mouth, line transfers to impression
- 31. Post-palatal Seal • • • • Disinfect Refresh the line with new indelible stick Prescribe a mechanical post-palatal seal Pour impression in Type III stone (ie. Microstone)
- 32. Boxing Final Impressions Rationale • Superior hardness of cast surface • Provides land area & preserves peripheral role • Minimizes trimming
- 34. Pour the Model
- 36. Trimming the Cast Land Area = 4mm Wide