Question 438 · LDEK · Cavity preparation
Indicate the true statements concerning resistance form in cavity preparation:
1) it provides the resistance of tooth tissues to destruction during mastication of the food;
2) it provides the resistance of the filling to destruction during mastication of the food;
3) it provides better retention of the restoration in the cavity;
4) resistance form can be achieved by rounding margins or sharping angles of the cavity;
5) resistance form can be achieved by slightly converging cavity walls towards the occlusal surface.
The correct answer is:
2) it provides the resistance of the filling to destruction during mastication of the food;
3) it provides better retention of the restoration in the cavity;
4) resistance form can be achieved by rounding margins or sharping angles of the cavity;
5) resistance form can be achieved by slightly converging cavity walls towards the occlusal surface.
The correct answer is:
- A. 1,3,5.
- B. 1,2,5.
- C. 1,2,4.
- D. 3,4,5.
- E. 2,3,4.
Hint
Separate the features that protect the tooth and filling from fracture from those that keep the filling from dislodging.
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