Question 173 · LDEK · Impressions and impression materials
Indicate the correct order of steps to perform the selective pressure impression according to Kozlowski:
1) taking the functional impression;
2) anatomical impression;
3) removal of impression material from the relieving areas and perforating the impression tray with the bur;
4) marking the relieving areas on the cast and covering them with a thin layer of gypsum;
5) fabrication of the gypsum cast;
6) fabrication of the individual impression tray;
7) marking the relieving areas on the mucous membrane;
8) introduction of the impression tray into patient’s mouth in order to copy the relieving areas;
9) putting the impression paste and pressing it against the basal seat area.
The correct answer is:
2) anatomical impression;
3) removal of impression material from the relieving areas and perforating the impression tray with the bur;
4) marking the relieving areas on the cast and covering them with a thin layer of gypsum;
5) fabrication of the gypsum cast;
6) fabrication of the individual impression tray;
7) marking the relieving areas on the mucous membrane;
8) introduction of the impression tray into patient’s mouth in order to copy the relieving areas;
9) putting the impression paste and pressing it against the basal seat area.
The correct answer is:
- A. 1,2,3,4,5,6,7,8.
- B. 2,5,4,6,1,7,8,3,9.
- C. 2,5,4,6,7,8,9,3,1.
- D. 2,5,4,6,1,7,8,9,3.
- E. 7,8,2,3,5,6,9,1,4.
Hint
Begin with an anatomical impression and a cast; relief areas are marked on the mucosa only after the functional impression, and paste comes last.
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