RPD Review Questions

Questions 121-130

Question #121

True or False

For a removable partial denture abutment that must be crowned, more than the normal occlusal reduction will be required.




Question 122

A lingual plate mandibular major connector may be selected because

the mandibular incisors are tilted lingually

there are mandibular tori present

there is a high lingual frenum

all of the above


Question 123

A master cast for a RPD should be blocked out and duplicated before

overlapped incisors are recontoured

rest preparations are prepared

the framework is waxed up

all of the above


Question 124

Rest placement on a terminal abutment of a Class I RPD depends on

the opposing occlusion

the tilt of the abutment

tissue undercuts

all of the above


Question 125

What is the problem (if any) with the design of the I-bar on tooth #28?

The I-bar should be placed in front of the greatest mesio-distal curvature, not behind it.

The I-bar should be placed more distally, closer to the guide plate.

The I-bar should extend above the survey line.

There is no problem; the position of the I-bar is correct.


Question 126

Your patient has the arch form shown to the right. You plan to use mesial rests and I-bars but will need to plate the premolars due to the tori. What should be the relationship of the superior border of the plating and the height of contour on the lingual surfaces of teeth numbers 20 and 29?

The plating must end below the height of contour.

The plating must end at the height of contour.

The plating must end above the height of contour.

None of the above is correct.


Question 127

A general rule for clasping teeth which lie anterior to the axis of rotation (e.g. tooth #21 in the illustration to the right) in a Class II modification 1 RPD is:

Always use cast clasps

Never use suprabulge clasps

Use wrought wire clasps

Use 0.030 inch undercut for stability


Question 128

A general rule for rest placement on an abutment adjacent to an extension area is?

Place the rest on the occlusal surface on the opposite side of the tooth from the extension area.

Place the rest on the occlusal surface adjacent to the extension area.

Place rests on both the mesial and distal occlusal surfaces.

Do not place a rest on this tooth.


Question 129

Low fusing metal is associated with which of the following procedures?

The altered cast impression.

Physiological adjustment of the framework.

The RPD remount cast.

Making records for RPDs.


Question 130

Physiologic adjustment of the framework

is usually done at delivery of the RPD.

should be done at the framework try-in appointment.

is usually done at the records appointment.

may be omitted in the presence of strong abutments and good residual ridges.


On to Questions 131 through 140