Question 79 · LDEK · Impressions and impression materials

Indicate impression techniques for obtaining diagnostic casts in manufacturing fixed partial dentures:

1) impression in 1-layer technique with the use of irreversible hydrocolloid;
2) impression in 2-layer technique with the use of reversible hydrocolloid;
3) impression in metal ring with the use of thermoplastic or elastic impression material;
4) impression with the use of a mixture of gypsum and wax;
5) one-step impression in 2-layer technique with the use of elastomer;
6) two-step impression in 2-layer technique with the use of elastomer;
7) FGP method.
The correct answer is:
  1. A. 5,6.
  2. B. 2,3,5.
  3. C. 3,5,6.
  4. D. 2,3,5,6.
  5. E. 3,4,6,7.
Hint

The listed techniques aim at precise casts on which restorations are made; exclude the imprecise method and those that are not impressions.

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