RPD Review Questions

Questions 71-80


Question #71

What is the major problem with the RPD framework shown to the right?

Teeth numbers 21 and 28 should be plated.

The plating on the lingual surfaces of the anterior teeth should cover the cinguli.

Distal rests would be better than mesial rests on teeth numbers 21 and 28.

Cast circumferential clasps are preferred with the mesial rests on teeth numbers 20 and 29.

 


Question #72

Which of the following could be reason(s) for choosing the double lingual bar major connector shown to the right?

Large interproximal spaces have resulted from periodontal surgery.

The patient exhibits a high floor of the mouth.

There is overlapping of the anterior teeth.

Both a and b above.

 


Question #73

True or False

When possible, plating on maxillary RPDs should be avoided due to the potential for interfering with speech and occlusion.

True

False

 


Question #74

The survey line (height of contour) of a full contour wax-up for a crown for an RPD abutment tooth can be visualized using

red wax

zinc stearate powder

border wax

pressure indicating paste

 


Question #75

Your patient has only teeth numbers 20 through 29 remaining. You have tried in the framework and are border molding the extension areas in preparation for an altered cast impression. The distobuccal area is shaped by the?

Buccinator muscle

Masseter muscle

Internal pterygoid muscle

Mylohyoid muscle

 

Question #76

Your patient has teeth numbers 20 through 29 remaining. The survey line and undercut (shaded area) for tooth #29 are as shown on the right. There is no contraindication to the use of an infrabulge clasps but there is a very solid contact in the mesial-occlsual fossa. What would be your choice for rest location and retentive arm?

Distal rest and cast circumferential clasp

Distal rest and cast I-bar

Mesial rest and cast I-bar

Distal rest and WW circumferential clasp

 


Question #77

Your patient has teeth numbers 20 through 29 remaining. The survey line and undercut (shaded area) for tooth #29 are as shown on the right. There is no contraindication to the use of an infrabulge clasps and there are no occlusal problems affecting rest location. What would be the best choice for rest location and retentive arm?

Mesial rest and I-bar

Mesial rest and modified T-bar

Mesial rest and WW circumferential clasp

Distal rest and WW circumferential clasp

 


Question #78

Your patient has teeth numbers 20 through 29 remaining. The survey line and undercut (shaded area) for tooth #29 are as shown on the right. There is no contraindication to the use of an infrabulge clasps. The opposing occlusion is provided by a complete denture. What would be your choice for rest location and retentive arm?

Mesial rest and I-bar

Mesial rest and modified T-bar

Mesial rest and cast circumferential clasp

Distal rest and WW circumferential clasp

 


Question #79

Your patient has only teeth numbers 20 through 29 remaining. You have tried in the framework and are border molding the extension areas in preparation for an altered cast impression. The distolingual border molding is shaped by the?

Masseter muscle

Internal pterygoid muscle

Superior constrictor muscle

Mylohyoid muscle

 


Question #80

True or False

As a general rule, plating is indicated for the maxillary arch if there are less than three contiguous maxillary incisor teeth remaining.

True

False

 


On to Questions 81 through 90