Question 308 · LDEK · Impressions and impression materials
When making a one-step impression using the two-layer technique for fixed dentures, the second layer is:
1) initially fluid;
2) initially plastic;
3) hardening as a result of a thermal reaction;
4) hardening as a result of a chemical reaction;
5) rigid in the finalized impression;
6) elastic in the finalized impression.
The correct answer is:
2) initially plastic;
3) hardening as a result of a thermal reaction;
4) hardening as a result of a chemical reaction;
5) rigid in the finalized impression;
6) elastic in the finalized impression.
The correct answer is:
- A. 1,3,5.
- B. 1,4,5.
- C. 2,3,5.
- D. 1,4,6.
- E. 2,3,6.
Hint
The second (correcting) layer must flow into the sulcus, set like other elastomers and spring back out of undercuts.
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