DEBASE

2. That part of the removable partial denture which rests
on oral mucosa and to which teeth are attached.
Plastic Resin
Acrylic
Polystyrene
Metal
Gold
Chrome Cobalt

3. FUNCTIONS OF DENTURE BASE
 Retains artificial teeth
 Transfer occlusal forces to supporting oral structures
 Helps in mastication
 Esthetics
 Stimulate underlying tissues
 Provide retention
 Stabilisation against horizontal forces
 Support prosthesis

4. TYPES
 Tooth Supported Partial Denture Base
 Distal Extension Partial Denture Base

5. REQUISITES FOR IDEAL DENTURE BASE
• Accuracy of Adaptation To Tissues With Low Volume
Change
• Dense non irritating surface capable of receiving &
maintaining a good finish
• Thermal conductivity
• Low specific gravity – Lightness in mouth
• Esthetics
• Biologically Compactable with tissues

6. • Dimensional stability
• Resist deformation
• Low Cost
• Self cleansing
• Potential for future relining
• Sufficient strength – Resistance to fracure /distortion

7. METHODS OF ATTACHING DENTURE BASE
Plastic Mesh Pattern
Open Ladder

8. Preformed Waxes

9. Wax up

11. BEADS & NAIL HEADS

12. Metal Denture base

13. METAL BASE - ADVATAGES
 Accuracy & performance of form
 Comparative tissue response
 Thermal conductivity
 Weight & Bulk

14. METAL BASE -DIS ADVATAGES
 Esthetics - Anterior
 Enhancement of retention not possible – lack of weight
of metal base
 Relining difficult
Restoration of normal facial contour can not be
achieved

15. METAL BASE - INDICATIONS
Tooth supported partial dentures
Inadequate interarch space
Structural details
Designed with optimun extension
Thinner base than plastic resin
Avoid sharp margins

16. Acrylic denture base

17. PLASTIC RESIN BASE -INDICATIONS
Extension base partial denture
Long span edentulous ridges
Relining
Contour restoration

18. PLASTIC RESIN BASE – STRUCTURAL
DETAILS
Adequate bulk & strength - junction of base & minor
connector
Tissue stops at extension base frame work
Placement of Base –
Placement over crest ridge- Resin breakage
Buccal/lingual of crest ridge

19. Teeth
Porcelain
Reinforced acrylic
Tube teeth
Facings
Metal
Resin

20. Teeth
Porcelain
Tube teeth
Facings
Metal
Resin
a
Reinforced acrylic

21. Teeth
Porcelain
Tube teeth
Facings
Metal
Resin
a
Reinforced acrylic

24. Teeth
Porcelain
Denture teeth
Tube teeth
Facings
Metal
Resin
a

25. Teeth
Porcelain
Tube teeth
Facings
Metal
Resin
a
Reinforced acrylic

26. METHODS OF ATTACHING ARTIFICIAL TEETH
 Porcelain/ Resin Artificial Teeth with Resin
 Porcelain/ Resin Tube Teeth & Facings Cemented
Directly to Metal Bases
 Resin Teeth Processed Directly To Metal Bases
 Metal Teeth Cast With Frame Work
 Chemical Bond