Content- Denture Base Ppt 1.Definition 2. Ideal Requirements of Denture Base Material 3. Functions 4. Types 5. Advantages & Disadvantages Reference: Textbook of Prosthodontics, Deepak Nallaswamy

1. DENTURE BASE
BY: NUR IRDINA BT YAHAYA

3. DEFINITION
• Parts of denture which rests on oral mucosa and to which
teeth are attached

4. IDEAL REQUIREMENTS- FOR DENTURE BASE
• Accurate tissue adaptations
• Ability to be relined if necessary
• Thermal Conductivity
• Sufficient Strength- To resist: Fracture and distortion under function
• Cost Effective

5. • Cleansability
• Ability to achieve good finish
• Low specific gravity

6. IDEAL REQUIREMENTS- FOR DENTURE BASE
MATERIAL
• Physical
- High strength and durability
- Good thermal properties
- Dimensionally stable
• Biological
- Biocompatible
- High chemical stability
- Absence of taste and odor
- Colour stability
- Insoluble in low sorption of oral fluids

7. • Manipulative
-Easy to fabricate and repair
• Economical
-Moderate cost

8. FUNCTIONS
• Support and retain denture teeth
• Distribute stress
• Improve esthetics

9. TYPES OF DENTURE BASE
• METALLIC
• NON-METALLIC

10. 1. METALLIC DENTURE BASE
• Uses: Tooth supported partial denture
• Fabricated using:
-Gold
-Gold alloy
-Chromium cobalt
-Nickel chromium alloy

11. Advantages
- Accurate soft tissue adaptations.
to:
Better retention and restoration old
facial contours
- Easy to be cleaned and polished as
metal base can be highly polished and
mucus deposit do not accumulate
under denture base
- Stronger than acrylic even in thin
sections
- Transfer thermal changes in the oral
cavity to underlying soft tissue,
producing a physiologic simulation.
Eliminates feeling of foreign
Disadvantages
- Difficult to trim and adjust
- Over-extension: Injure soft tissue
- Underextension: Lead to ridge
resorption
- Poor aesthetics
- Difficult to reline or rebase

13. 2. NON-METALLIC DENTURE BASE
• Used along with acrylic tooth replacements
• Attached to framework by minor
connectors
• Should be at least 1.5 mm thick
• Used for:
Distal extension partial dentures

14. Disadvantages
Should rest on large areas: For
stress distribution
Denture base should be thick: To
withstand occlusal forces
May break on usage
Tend to distort by release of internal
strains
Tend to accumulate mucous deposits.
Leads to: Calculus formation, soft tissue
irritation
Advantages
Anterior teeth can be replaced at their
original position even in cases with
residual ridge resorption
Restores contour of edentulous ridge
Brings out normal contours of lips and
cheeks
Can be relined

15. REFERENCE
• Textbook of Prosthodontics, Deepak Nallasamy

16. THANK YOU