8.boxing impressions and making casts
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This document provides instructions for boxing dental impressions and pouring dental casts. It describes two methods for boxing maxillary impressions using either wax rods and strips or plaster and pumice. It also details how to box mandibular impressions using wax or plaster/pumice. The key steps are applying wax or plaster/pumice to form a land around the impression, wrapping it in wax to create a container, and pouring stone to make the cast. The cast is then trimmed with landmarks added to aid reattachment of dentures.
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Wax patterns fabrication for fixed partial dentures
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Digital Design of Mandibular Removable Partial Dentures
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There are three basic phases of the digital workflow when designing and/or fabricating removable partial denture frameworks; data acquisition, designing (computer aided design (CAD)), and computer-aided manufacturing (CAM). The bulk of this presentation is dedicated to the design steps used in this workflow utilizing sample maxillary and mandibular castsDigital design of maxillary of rpd's
There are three basic phases of the digital workflow when designing and/or fabricating removable partial denture frameworks; data acquisition, designing (computer aided design (CAD)), and computer-aided manufacturing (CAM). The bulk of this presentation is dedicated to the design steps used in this workflow utilizing sample maxillary and mandibular casts
Prosthodontics Procedures and Complications - Posterior Quadrants
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This document discusses prosthodontic procedures and complications in posterior quadrants. It covers topics such as exam and workup, selection of implants, platform switching, abutment selection, provisional restorations, and new technologies like shape memory sleeve abutments. Key points addressed include that no implant design has been proven superior for marginal bone loss, and custom abutments offer better control of margins and occlusal thickness than prefabricated abutments. New technologies aim to simplify procedures and improve retrievability of restorations.Single tooth
This document discusses single tooth defects in the posterior quadrants and their restoration. It compares fixed dental prostheses to implants, noting that implants are generally preferred when adjacent teeth are healthy or nearly so. For endodontically treated teeth, a fixed restoration is preferred if sufficient tooth structure remains and occlusion and parafunction are minimal. Considerations for implant placement include anatomic factors, timing of placement, and prosthodontic issues like abutment selection and cement versus screw retention. The goal is to restore function while avoiding complications like fracture, overload, and peri-implantitis.
Restoration of posterior quadrants
This document discusses implant biomechanics and treatment planning considerations for restoring posterior quadrants. It notes that implant restorations must be designed to avoid overload, as excessive loads can lead to bone loss and implant failure over time. Key factors discussed include implant number, length, alignment relative to curves of Spee and Wilson, and linear versus curvilinear configurations. Curvilinear arrangements are emphasized as withstanding more load than linear arrangements due to greater cross-arch stabilization. Case examples demonstrate successful long-term outcomes and failures where biomechanics were not adequately considered.
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Restoration of endodontically treated teeth
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Crowns significantly improve the success of endodontically treated posterior teeth but do not improve the success of anterior teeth. Posterior teeth require crowns more often than anterior teeth due to greater cuspal deflection after root canal treatment. The main purpose of a post is to retain a core, not strengthen teeth. Posts should extend to retain 5mm of gutta percha and not exceed 7mm in molars. The diameter of posts should not exceed one-third of the root diameter and range between 0.6-1.2mm. A ferrule of at least 2mm helps prevent tooth fracture.Provisional restorations
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Fluid control and tissue managemtent
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Ceramics in fixed prosthodontics considerations for use in dental practice
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1) There are two main hardening mechanisms for dental cements - acid-base reactions and polymerization reactions. Common cements that use acid-base reactions include zinc phosphate, polycarboxylate, and glass ionomer cements. Resin cements use a polymerization reaction.
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Single tooth defects in the posterior quadrants
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1. Single tooth defects in the posterior quadrants can often be restored with either fixed dental prostheses or dental implants, depending on the clinical situation and anatomical factors.
2. Implant placement can be immediate, delayed, or staged depending on factors like infection, bone quality, and proximity to anatomical structures.
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This document discusses cement retention versus screw retention for dental implants. Both methods can be used if done properly. Cement retention is simpler but risks residual cement being left under gums, which can lead to peri-implantitis. Screw retention allows easy removal but requires access holes. Residual subgingival cement is the major problem, as it is difficult to fully remove and can cause inflammation and bone loss over time.12.resin bonded prostheses
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10.rest rct
Crowns significantly improve the success of endodontically treated posterior teeth. Posts are primarily used to retain cores and do not strengthen teeth. The appropriate post length is to extend to the radiographic apex with 5mm of gutta percha retained. Post diameter should not exceed 1/3 of the root diameter and range from 0.6-1.2mm. A ferrule of at least 2mm is recommended to prevent root fracture.
9.dental cements
This document discusses various dental cements and cementation procedures. It describes the compositions, characteristics, and mixing procedures of different cement types including provisional cements, zinc phosphate cement, polycarboxylate cement, glass ionomer cement, resin-modified glass ionomer cement, resin cement, and calcium aluminate cement. It also outlines various clinical procedures for cementation such as provisional crown removal, tooth preparation, crown placement, adjustment, and cement cleanup.
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8.boxing impressions and making casts
- 1. 8. Boxing Impressions and Making Casts John Beumer III, DDS, MS and Robert Duell, DDS Division of Advanced Prosthodontics, Biomaterials and Hospital Dentistry UCLA School of Dentistry This program of instruction is protected by copyright ©. No portion of this program of instruction may be reproduced, recorded or transferred by any means electronic, digital, photographic, mechanical etc., or by any information storage or retrieval system, without prior permission.
- 5. Boxing - Beading and Boxing with Wax 1) Apply a layer of sticky wax around the the impression 3 mm below the periphery as shown. Maxillary impression
- 6. Boxing – Beading and Boxing with Wax 2) Apply and seal rods of beading wax to the sticky wax on the impression to form the land.
- 7. Boxing – Beading and Boxing with Wax 3) Wrap a sheet of red boxing wax around the beading wax to form a container. All joints must be sealed with hot wax to prevent stone from leaking through.
- 10. Prepare a dense mix of yellow stone using your vacuum mixer and vibrate the stone into the boxed impression. Be careful to avoid entrapment of air bubbles. Pouring the Cast
- 14. The same result can be achieved by boxing the entire impression with a mixture of plaster and pumice (to form the land area) and boxing wax to create the enclosure. If you use this method be sure to coat the plaster pumice mixture with vaseline before you pour stone into impression so that cast will separate from this mixture. Boxing the Impression
- 17. After heating the compound in a water bath, carefully separate the cast from the impression Retrieving the Cast
- 19. Trim master casts. The base should be no thicker than 15-20 mm. If the base is too thick the cast will not fit within the confines of the denture flask. The land of the cast must be at the same level as the edge of the lower member of the flask. Trimming the Master Cast
- 20. Completed Master Cast Land (4-6mm thick) Base (15-20 mm thick) Depth of peripheral roll (2-3 mm)
- 21. The base for this cast was insufficient and eventually it fractured necessitating remaking of the impression Trimming the Master Cast
- 22. Master Casts These casts have been properly trimmed and marked. Place rounded notches (arrows) on the bottom of the master cast. These notches will later be used to remount the processed denture back onto the articulator. The notches should be placed on the back and on the sides of the casts.
- 23. Anterior land Cast Landmarks - Maxilla Midline Incisive papilla
- 24. Lines indicating the crest of the ridge Cast Landmarks -Mandible Midpoint of retromolar pad Land Mark on land indicating the midpoint of the retromolar pad