Question 143 · LDEK · Prosthodontic materials
Indicate the true statements concerning investment materials:
1) they are used for fabricating the casting molds in cast partial dentures’ fabrication;
2) they are used for fabricating the casting molds in acrylic dentures’ fabrication;
3) they are used for fabricating the so-called duplicated casts;
4) coefficient of expansion compensates the solidification shrinkage of metal during cooling;
5) coefficient of expansion plays no role in compensating the solidification shrinkage of metal.
The correct answer is:
2) they are used for fabricating the casting molds in acrylic dentures’ fabrication;
3) they are used for fabricating the so-called duplicated casts;
4) coefficient of expansion compensates the solidification shrinkage of metal during cooling;
5) coefficient of expansion plays no role in compensating the solidification shrinkage of metal.
The correct answer is:
- A. 2,3,5.
- B. 2,3,4.
- C. 1,3,4.
- D. 1,3,5.
- E. 1,5.
Hint
Investment must survive casting temperatures; where in denture making is molten metal cast, and how is the metal's shrinkage offset?
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.
More questions on Prosthodontics
- Which of the following finish lines should be performed while preparing the abutment tooth for the full metal crown?
- The intaglio of full-ceramic fixed partial dentures, made of feldspathic ceramic, should be prepared by:
- The prevention of prosthetic stomatopathy in the case of removable dentures includes:
- Which of the indications concern all-ceramic restorations?
- When taking a functional impression of the alveolus with undercuts, in the case of fully edentulous arch, the following impression materials should…
- Indicate the consecutive layers of porcelain applied on the metal core of the crown/ bridge: