Power Point Presentation for Dental Materials with Labs

Module: Prosthodontics: Fixed Prosthodontics Part A: Types of Fixed Prosthetics Part B: Fixed Prostheses

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. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 3

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

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 5

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

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 7

$Cosmetic Dentistry Crowns and bridges Tooth lengthening Repairing fractures Veneers Restoring strength Changing shape$

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

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

Materials Used for Fixed Prostheses Gold alloy Porcelain fused to metal Porcelain Composite resin

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 11

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 12

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 13

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

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 15

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

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

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

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

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

Crown Cementation • Check fit – Margin – Contacts – Occlusion • Adjust if

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

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 23