PowerPoint® Presentation for
Dental Materials with Labs
Module:
Prosthodontics: Fixed
Prosthodontics
Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.
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Module: Prosthodontics:
Fixed Prosthodontics
Prosthodontics:
Fixed
Prosthodontics
Part A: Types of
Fixed Prosthetics
Part B: Fixed
Prostheses
Procedures
Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.
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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.
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Fixed Prosthetics
Learning Objectives
5. Demonstrate assisting during a crown
preparation appointment.
6. Demonstrate assisting during a crown
cementation appointment.
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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
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Part A: Types of Fixed Prosthodontics
Purpose of Prosthodontics
Restore masticatory function
Improve appearance
Improve speech
Promote good oral hygiene
Stabilize arch and occlusion
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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
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Cosmetic Dentistry
Crowns and
bridges
Tooth
lengthening
Repairing
fractures
Veneers
Restoring
strength
Changing
shape
Tooth
whitening
Occlusion
Changing
shade
Orthodontics
Closing a
diastema
Esthetics
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Types of Fixed Prostheses
Porcelain
veneers
Direct
resin
veneers
Indirect
resin
veneers
Full-cast
crown
Fixed
prostheses
Partial
crown
Inlays
Onlays
Bridges
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Materials Used for Fixed Prostheses
Gold
alloy
Porcelain
fused to metal
Porcelain
Composite
resin
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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
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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
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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
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Part B: Fixed Prosthesis Procedures
Crown preparation set-up
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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
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Margin Preparations
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Tissue Retraction
• Placed in gingival
sulcus
• Mechanical and
chemical retraction
• Prevents bleeding
• Ensures
impression of
gingival margin
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Elastomeric Impressions
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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
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The Laboratory Prescription
Patient’s
name
Tooth
shade
Description
of prosthesis
Dentist’s
information
Materials
for prosthesis
Date
requested
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Crown Cementation
• Check fit
– Margin
– Contacts
– Occlusion
• Adjust if necessary
• Permanent cement
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Fixed Prostheses Maintenance
• Crowns
• Bridges
• Dental
implants
Toothbrush
Threading
systems
Antimicrobial
rinses
Plaque
removal
Water
irrigators
Dental
floss
Interproximal
bushes
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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
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Summary of Module
• Key Terms
• Types of fixed prosthetics
• Fixed prostheses procedures
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