Question 189 · LDEK · Acrylic partial dentures
Indicate the true statements concerning clasps retaining the mucosa-supported removable partial denture:
1) clasps retain the denture by means of wedging, adhesion, cohesion and frictional forces;
2) the main force retaining the partial denture is the frictional force due to the use of clasps;
3) there are wire and tin clasps, wrought and cast clasps, telescopic and cylindrical clasps;
4) wrought-wire clasps consist of the retentive arm, intermediate arm and tang;
5) the circumferential clasp arm and the tooth can have a surface, line or point contact;
6) the circumferential clasp arm should be partially or completely placed in the retentive undercut;
7) the circumferential clasp arm is designed on a parallel or oblique tooth surface;
8) the most commonly used retentive elements are wrought-steel wire clasps.
The correct answer is:
2) the main force retaining the partial denture is the frictional force due to the use of clasps;
3) there are wire and tin clasps, wrought and cast clasps, telescopic and cylindrical clasps;
4) wrought-wire clasps consist of the retentive arm, intermediate arm and tang;
5) the circumferential clasp arm and the tooth can have a surface, line or point contact;
6) the circumferential clasp arm should be partially or completely placed in the retentive undercut;
7) the circumferential clasp arm is designed on a parallel or oblique tooth surface;
8) the most commonly used retentive elements are wrought-steel wire clasps.
The correct answer is:
- A. 1,2,3,4,7.
- B. 2,3,5,7,8.
- C. 1,3,5,7,8.
- D. 2,4,5,6,8.
- E. 2,3,5,6,8.
Hint
In a mucosa-supported denture, ask which forces the clasp itself supplies and where its arm must lie relative to the survey line.
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 procedures are considered as preliminary (initial) prosthetic procedures?
- Mucosa and tooth supported dentures include:
- The lost wax technique can be described as follows:
- The examination of the oromandibular system, routinely performed prior to prosthetic treatment planning, involves:
- Indicate the possibilities of limiting the base of an upper mucosa-supported removable partial denture:
- When designing retention for partial dentures by means of clasps, the following rules should be observed: