MDS PREP
Contraindication for using a bar-type direct retainer is
1) Used on a distobuccal on terminal abutments
2) When aesthetics demand less display of metal
3) When a push type of retention is needed
4) When a large tissue undercut is present
Prosthodontics
Answer: 3
Loading on mucosa in distal extension RPD is increased when
1) Bases covering are large with excessive forces
2) Bases covering are small with excessive forces
3) Borders are overextended
4) All of the above
Prosthodontics
Answer: 2
A fixed partial denture become loose after two months. The probable reason may be
1) Torquing forces tend to displace the retainer
2) Improper preparation of abutments for retainer
3) Distortion of the metal casting during function
4) All of the above
Prosthodontics
Answer: 4
The following combination of the teeth should be avoided for complete denture
1. Anterior porcelain and posterior acrylic
2. Anterior acrylic and posterior porcelain
3. Both of the above
4. None of the above
Prosthodontics
Answer: 1
The amount of closing pressure for the patient with small jaw bone size compared with one having large jaw bones will be
1. Same
2. Less
3. More
4. None of the above
Prosthodontics
Answer: 2
Resin teeth
1. Show a high compressive strength
2. Contraindicated in patients with decreased interocclusal distance
3. Show crazing
4. Show a high fracture strength