1. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 1 PowerPoint ® Presentation for Dental Materials with Labs Module: Prosthodontics: Fixed Prosthodontics

2. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 2 Module: Prosthodontics: Fixed Prosthodontics Prosthodontics: Fixed Prosthodontics Part A: Types of Fixed Prosthetics Part B: Fixed Prostheses Procedures

3. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 3 Module: Prosthodontics: Fixed Prosthodontics Learning Objectives 1. Define the Key Terms. 2. Describe various types of fixed prostheses and their functions. 3. Describe dental materials used in fixed prostheses. 4. Explain the role of the dental assistant in fixed prosthodontic treatment.

4. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 4 Fixed Prosthetics Learning Objectives 5. Demonstrate assisting during a crown preparation appointment. 6. Demonstrate assisting during a crown cementation appointment.

5. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 5 Key Terms Abutments Bite registration Cosmetic/esthetic dentistry Dental casting alloy Fixed prosthodontics Full-cast crown Inlays Maryland bridge Onlays Partial crown Pontic Porcelain-to-metal crowns Post-retained cores Prostheses Retention core Retention pins Shade guide Veneers

6. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 6 Part A: Types of Fixed Prosthodontics Purpose of Prosthodontics Restore masticatory function Improve appearance Improve speech Promote good oral hygiene Stabilize arch and occlusion

7. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 7 Contraindications for a Fixed Prosthesis Lack of supporting alveolar bone Presence of periodontal disease Excessive mobility of abutment teeth Lack of patient interest in oral hygiene Patient cannot afford treatment

8. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 8 Cosmetic Dentistry Esthetics Closing a diastema Orthodontics Changing shadeOcclusion Tooth whitening Changing shape Restoring strengthVeneers Repairing fractures Tooth lengthening Crowns and bridges

9. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 9 Types of Fixed Prostheses Porcelain veneers Direct resin veneers Indirect resin veneers Bridges Onlays Partial crown Full-cast crown Fixed prostheses Inlays

10. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 10 Materials Used for Fixed Prostheses Composite resin Porcelain fused to metal Gold alloy

11. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 11 Retention of Restorations Core buildup –Recreation of lost tooth structure Retention pins –Screwed into dentin –Hold core filling material Post and core –After root canal therapy –Strengthens tooth

12. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 12 The Dental Laboratory Dental lab technician –Fabricates restoration –Makes die from impression –Creates wax pattern on die –Invests wax and casts invested material into metal –Prepares metal for porcelain layers –Finishes and polishes final restoration

13. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 13 Dental Assistant Responsibilities Communicate closely with lab technician Dental assistant –Inform patient of procedure steps –Prepare equipment and supplies –Assist dentist during procedure –Expanded functions in many states –Coordinate patient appointments –Some lab procedures performed in office

14. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 14 Part B: Fixed Prosthesis Procedures Crown preparation set-up

15. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 15 Selecting a Tooth Shade Before preparation Moisten shade guide Match to natural teeth under natural light Record in patient’s chart Record on lab prescription

16. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 16 Margin Preparations

17. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 17 Tissue Retraction Placed in gingival sulcus Mechanical and chemical retraction Prevents bleeding Ensures impression of gingival margin

18. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 18 Elastomeric Impressions

19. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 19 Provisional Restorations Temporary coverage to protect tooth between appointments Fit gingival margin snugly Protect gingiva and interproximal areas Stabilize contacts and occlusion Esthetics and patient comfort

20. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 20 The Laboratory Prescription Description of prosthesis Dentist’s information Date requested Materials for prosthesis Patient’s name Tooth shade

21. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 21 Crown Cementation Check fit –Margin –Contacts –Occlusion Adjust if necessary Permanent cement

22. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 22 Fixed Prostheses Maintenance Crowns Bridges Dental implants Antimicrobial rinses Water irrigators Interproximal bushes Dental floss Threading systems Toothbrush Plaque removal

23. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 23 Assessment Questions What is the term for the tooth being replaced in a bridge? The pontic What is the term for the stabilizing teeth on each side of the pontic? The abutments Where is the gingival retraction cord placed? In the gingival sulcus around the collar of the tooth

24. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 24 Summary of Module Key Terms Types of fixed prosthetics Fixed prostheses procedures