Question 80 (part 2) · LDEK · Impressions and impression materials
Indicate true statements regarding individual trays:
1) the range of tray is determined by full extent of anatomic impression;
2) the range is determined by the dentist;
3) individual tray should cross the border of movable and immovable mucosa in case of extensive impressions;
4) individual tray should exhibit stabilization on prosthetic field;
5) they are made out of shellac, even when the impression is taken with thermoplastic material.
Correct answer is:
2) the range is determined by the dentist;
3) individual tray should cross the border of movable and immovable mucosa in case of extensive impressions;
4) individual tray should exhibit stabilization on prosthetic field;
5) they are made out of shellac, even when the impression is taken with thermoplastic material.
Correct answer is:
- A. only 1.
- B. 2,4.
- C. 1,2,3.
- D. 2,4,5.
- E. all of the above-mentioned.
Hint
The custom tray is outlined by the dentist slightly short of the vestibular depth and must sit stably.
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