RPD Review Questions

Questions 61-70


Question #61

True or False

The altered cast impression technique is often used on Class I and Class III RPDs.

True

False

 


Question #62

Your patient exhibits the partially edentulous mandibular arch shown to the right. The maxillary arch is to be restored with a complete denture. Teeth 20 and 29 will receive crowns. There are no contraindications to any type of clasping. Which of the following clasp assemblies would you use on 20 and 29.

Mesial rests and I-bars

Mesial rests and modified T-bars

Distal rests and WW circumferential clasps

Distal rests and cast circumferential clasps.

 


Question #63

Your patient exhibits the partially edentulous mandibular arch shown to the right. The maxillary arch is to be restored with a complete denture. Teeth 20 and 29 will receive crowns. There are very high labial frenal attachments on both sides. Which of the following clasp assemblies would you use on 20 and 29?

Mesial rests and I-bars

Mesial rests and modified T-bars

Distal rests and WW circumferential clasps

Distal rests and cast circumferential clasps.

 


Question #64

Your patient exhibits the partially edentulous mandibular arch shown to the right. The maxillary arch is to be restored with a complete denture. The undercuts on 20 and 29 are on the distal portion of the facial surface. There are no contraindications to either infrabulge or suprabulge retainers. Which of the following clasp assemblies would you use on 20 and 29?

Mesial rests and I-bars

Mesial rests and modified T-bars

Distal rests and WW circumferential clasps

Distal rests and cast circumferential clasps

 


Question #65

True or False

Reciprocation of clasps is related to the timing of contact between the bracing and retentive clasp arms in order to prevent undue forces on the abutment teeth during seating and removal of the RPD.

True

False

 


Question #66

Your patient has the partially edentulous arch shown to the right. The undercuts on 21 and 28 are on the mesiofacial surfaces. The most commonly used clasp assemblies on the premolars would be:

Distal rests and I-bars

Distal rests and modified T-bars

Distal rests and cast circumferential clasps

Distal rests and WW circumferential clasps

 


Question #67

Your patient has the partially edentulous arch shown to the right. The undercuts on 21 and 28 are on the distofacial surfaces. There are no contraindications to any types of clasps. Under these circumstances, the most commonly used clasp assemblies on the premolars would be:

Distal rests and I-bars

Distal rests and modified T-bars

Distal rests and cast circumferential clasps

Distal rests and WW circumferential clasps

 


Question #68

Your patient has the partially edentulous arch shown to the right. The undercuts on 21 and 28 are on the mesiofacial surfaces and there are no contraindications to suprabulge or infrabulge retainers. The long range prognosis for the molars is poor but your patient does not want them extracted at this time. Several alterations in the usual design could be made to facilitate later conversion of the prosthesis to a class I RPD. One of them involves the clasp assemblies on the premolars. Your recommendation?

Distal rests and I-bars

Distal rests and modified T-bars

Distal rests and cast circumferential clasps

Distal rests and WW circumferential clasps

 


Question #69

True or False

Your patient has the partially edentulous arch form shown to the right. The molars have drifted mesially and lingually. With these factors in mind, rigid metal retention could be considered for use on the molars.

True

False

 


Question #70

Which one of the following classes of RPDs NEVER has an axis of rotation?

Class I

Class II

Class III

Class IV

 


On to Questions 71 through 80