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
1. Define the Key Terms.
2. Describe various types of fixed
prostheses and their functions.
3. Describe dental materials used in fixed
4. Explain the role of the dental assistant in
fixed prosthodontic treatment.
5. Demonstrate assisting during a crown
6. Demonstrate assisting during a crown cementation appointment.
Dental casting alloy
Part A: Types of Fixed Prosthodontics Restore masticatory function Improve appearance Improve speech Promote good oral hygiene Stabilize arch and occlusion Purpose of Prosthodontics
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
Materials Used for Fixed Prostheses Composite resin Porcelain Porcelain fused to metal Gold alloy
Retention of Restorations
Recreation of lost tooth structure
Screwed into dentin
Hold core filling material
Post and core
After root canal therapy
The Dental Laboratory
Dental lab technician
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
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
Moisten shade guide
Match to natural teeth under natural light
Record in patient’s chart
Record on lab prescription
Placed in gingival sulcus
Mechanical and chemical retraction
Ensures impression of gingival margin
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
The Laboratory Prescription Description of prosthesis Dentist’s information Date requested Materials for prosthesis Patient’s name Tooth shade
Adjust if necessary
Fixed Prostheses Maintenance
Plaque removal Antimicrobial rinses Water irrigators Interproximal bushes Dental floss Threading systems Toothbrush
What is the term for the tooth being replaced in a bridge?
What is the term for the stabilizing teeth on each side of the pontic?
Where is the gingival retraction cord placed?
In the gingival sulcus around the collar of the tooth