Question 323 · LDEK · Complete dentures
Good retention of complete denture on its basal seat depends on the need for closure of external and internal valves. To close the external valve, you should:
- A. shape borders of impression during soft tissue motions.
- B. make anatomical impression.
- C. apply secondary sealing.
- D. seal borders of individual impression tray with impression wax.
- E. apply appropriate impression material.
Hint
The external valve is formed where the mobile vestibular tissues wrap around the denture border, so think about how that border gets its shape.
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