Question 100 (part 2) · LDEK · Impressions and impression materials
Indicate true statement regarding functional impressions, preformed in the process of prosthetic rehabilitation in edentulous patients:
1) they are performed on individual trays or previous denture, under the assumption that the denture meets the clinical requirements;
2) for both jaws, the range control of trays requires Herbst tests;
3) during performing the upper functional impression, secondary seal may be performed;
4) they are performed in order to increase the accuracy of prosthetic field reproduction;
5) for performing functional impressions, among others, reversible impression materials are used;
6) materials used for individual tray fabrication is shellac, fast polymerisating material and composite material.
Correct answer is:
2) for both jaws, the range control of trays requires Herbst tests;
3) during performing the upper functional impression, secondary seal may be performed;
4) they are performed in order to increase the accuracy of prosthetic field reproduction;
5) for performing functional impressions, among others, reversible impression materials are used;
6) materials used for individual tray fabrication is shellac, fast polymerisating material and composite material.
Correct answer is:
- A. 1,3.
- B. 1,2,6.
- C. 1,3,6.
- D. 2,4.
- E. 1,5.
Hint
Consider which posterior seal is made during the impression and which on the cast, and what custom trays are made of.
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