Question 55 · LDEK · Model analysis
Which of the following types of plaster are used in orthodontics?
1) plaster used for taking impressions-type 1;
2) plaster used for making models-type 2;
3) plaster used for molding-type 3;
4) plaster used for molding with increased resistance and low expansion - type 4;
5) synthetic plaster - type 4.
The correct answer is:
2) plaster used for making models-type 2;
3) plaster used for molding-type 3;
4) plaster used for molding with increased resistance and low expansion - type 4;
5) synthetic plaster - type 4.
The correct answer is:
- A. 1,2,3,4.
- B. 2,3,5.
- C. 2,3,4.
- D. 1,3.
- E. all the above.
Hint
Orthodontic impressions are taken with alginate or silicone; then consider which gypsum products serve for bases, study casts and durable working casts.
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