Question 151 · LDEK · Dental laboratory technology
Which of the following procedures performed during the repair of a fractured acrylic denture base plate are correct?
1) controlling the sharpness of the fragments’ surface and the possibility of matching them exactly;
2) the fragments are immobilized using modeling wax on the side from the gingival surface;
3) after pouring the cast, the fracture gap is widened to 2 mm and beveled at 30 degrees;
4) after pouring the cast, the fracture gap is smoothened with a file or with a grinding paper.
The correct answer is:
2) the fragments are immobilized using modeling wax on the side from the gingival surface;
3) after pouring the cast, the fracture gap is widened to 2 mm and beveled at 30 degrees;
4) after pouring the cast, the fracture gap is smoothened with a file or with a grinding paper.
The correct answer is:
- A. 1,2,3.
- B. 1,2.
- C. 1,2,4.
- D. 1,3.
- E. 1,4.
Hint
Think about which side the repair cast is poured on and how to give the new acrylic enough bonding surface and bulk.
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