The single complete denture is a complex prosthesis that requires a complete understanding of the basics of prosthetic rehabilitation of lost natural dentition. Several difficulties are encountered in providing a successful single complete denture treatment, the most common being repeated fracture of the prosthesis.

1. Single Complete
Dentures
Dr.Himanshu Tiwari
Senior Lecturer
Dept. Of Prosthodontics
and Crown & Bridge

2. Maxillary Single Dentures
• More common
• Teeth usually lost before
their mandibular antagonists

3. Mandibular Single Dentures
• Avoid when possible
• Severe ridge resorption due to
force
• Stress reduction should be used
– Processed resilient denture liner
– Overdenture
– Implant retained denture

4. Single Denture Problems
• More difficult
• Greater force causes:
– Displacement
– Fracture due to flexure
– Severe residual ridge resorption

5. Natural Tooth Positions
• More difficult
• Tooth malpositions decrease stability
(extrusion, tipping, rotation)
• Difficulty balancing

6. May Require Occlusal Adjustment
• Adjust natural teeth if need to
– Reduce severe curve of Spee - level
supraeruptions
– Recontour rotated teeth
to permit contacts on
flat surfaces

7. Simplifying Single Denture Occlusion
– Reduce cusps in shaded area, to level plane of
occlusion
Mock adjustment can be
performed on a diagnostic cast
Severe Curve of Spee
Supereruption

8. Avoid Single Denture vs Anterior
Teeth
• Resorption
• Loosening
• Fracture
• Combination
Syndrome

9. Avoid Single Denture vs Anterior
Teeth
• Fabricate a RPD for Stress
Distribution
• Make CD & RPD at the same time
– Ensures optimal occlusion

10. Occlusion Rims
• Use to establish OVD,
NOT Incisal Display
• Overbite will be
incorporated when
anterior teeth are set,
lengthening incisal edges

11. Recording Centric Position
• Flat Surface for
Opposing Teeth
– No inclines
– If steps in occlusal
plane, provide flat areas
for opposing natural
teeth

12. Jaw Relations vs. RPD
• Occlusion Rims on RPD
framework
• Opposes CD Rims
• Centric and eccentric
records with registration
media
• Optimizes occlusion

13. In Conjunction with Fixed
Prostheses
• Crowns or bridges
should be waxed up
against the CD tooth
setup
• Optimizes occlusion
• Ensures changes can be
made

14. Maxillo-Mandibular
Relations
• Centric Registration
– CUD usually stable
– Extraoral hand
position if opposing
natural dentition (less
obtrusive)

15. Setting Anterior Teeth
• More difficult
– Setting for esthetics may
produce excessive overbite
with natural teeth
– Decreases stability
– Compromised position,
used to balance need for
esthetics & function

16. Posterior Denture Teeth
• Requires more adjustment to
obtain stable centric contacts
– Denture teeth will not normally articulate
well with natural dentition
– Pinpoint contacts/inclines, etc.

17. Tip:
• Increase incisal pin 1mm
• Set posterior teeth
• Let wax harden
• Return pin to original
position
• Adjust occlusion until pin
touches table

18. Cast Metal Denture Base
• Use if denture fractures
repeatedly
• Usual causes:
– Heavy forces from natural
teeth
– Occlusal contacts on inclines
– Impingement on a bony
midline
• flexing of the denture

19. Denture Teeth Wear
• More rapid against natural teeth
• More frequent recalls
• Adjust occlusion to prevent
changes in stress distribution

20. Denture Teeth Wear More
Rapidly
• Never use porcelain denture
teeth
– Severe attrition of natural teeth
– Prefer denture teeth to wear

21. Thank You…