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PowerPoint® Presentation for Dental Materials with Labs

Module:

Prosthodontics: Fixed Prosthodontics


Module: Prosthodontics: Fixed Prosthodontics

Prosthodontics: Fixed

Prosthodontics

Part A: Types of Fixed Prosthetics

Part B: Fixed Prostheses Procedures


Module: Prosthodontics: Fixed Prosthodontics

Learning Objectives1. 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.


Fixed Prosthetics

Learning Objectives

5. Demonstrate assisting during a crown

preparation appointment.

6. Demonstrate assisting during a crown cementation appointment.


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


Part A: Types of Fixed Prosthodontics

Purpose of Prosthodontics

Restore masticatory function

Improve appearance

Improve speech

Promote good oral hygiene

Stabilize arch and occlusion


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


Cosmetic Dentistry

Esthetics

Closing a diastemaOrthodontics

Changing

shadeOcclusion

Tooth

whitening

Changing

shape

Restoring

strengthVeneers

Repairing

fractures

Tooth

lengthening

Crowns and

bridges


Types of Fixed Prostheses

Porcelainveneers

Directresin

veneers

Indirectresin

veneers Bridges

Onlays

Partialcrown

Full-castcrown

Fixed prostheses

Inlays


Materials Used for Fixed Prostheses

Compositeresin

Porcelain

Porcelainfused to metal

Goldalloy


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


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


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


Part B: Fixed Prosthesis Procedures

Crown preparation set-up


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


Margin Preparations


Tissue Retraction

• Placed in gingival sulcus

• Mechanical and chemical retraction

• Prevents bleeding

• Ensures impression of gingival margin


Elastomeric Impressions


Provisional Restorations

Temporary coverage to protect toothbetween appointments

Fit gingival margin snugly

Protect gingiva and interproximal areas

Stabilize contacts and occlusion

Esthetics and patient comfort


The Laboratory Prescription

Descriptionof prosthesis

Dentist’sinformation

Date requested

Materialsfor prosthesis

Patient’s name

Toothshade


Crown Cementation

• Check fit

– Margin

– Contacts

– Occlusion

• Adjust if necessary

• Permanent cement


Fixed Prostheses Maintenance

• Crowns• Bridges• Dental

implants

Antimicrobialrinses

Waterirrigators

Interproximalbushes

Dental floss

Threadingsystems

Toothbrush

Plaqueremoval


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


Summary of Module

• Key Terms

• Types of fixed prosthetics

• Fixed prostheses procedures

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