RPD Review Questions

Questions 11-20

Question #11

Referring to the maxillary class II RPD design shown to the right, which of the following statements is TRUE?

A short thick I-bar clasp could be used on tooth #6.

A wrought wire circumferential clasp could be used on tooth #6.

It is sometimes not necessary to use any clasp on tooth #6.

2 and 3 are both true

Question #12

The following statement refers to the drawing of the class I RPD to the right: The clasp arm on tooth #20 should be wrought wire BECAUSE functional forces cause tissueward movement of the denture base, the denture rotates around the rest (which is on the distal), and the clasp arm engages the tooth, tending to tilt it distally.

The statement and the reason are true AND related.

The statement and the reason are true but are NOT related.

The statement is true but the reason is false.

Neither the statement nor the reason is true.

Question #13

In the maxillary class I RPD shown at the right, the posterior border of the palatal plate major connector should be located

as far forward as is possible while maintaining enough width for strength

approximately 20 mm behind the anterior border

approximately 10 mm anterior to the fovea palatini

at the posterior palatal seal area

Question #14

True or False

All components of a maxillary major connector should cross the palate at right angles to the midline and curves in the major connector should be located to one side of the midline.

True

False

Question #15

In the case shown to the right, which is the most effective indirect retainer?

The rest on tooth #19.

The rest on tooth #21.

The rest on tooth #27.

The rest on tooth #28.

Question #16

What is the most significant problem with the rest shown on the mandibular canine to the right?

The rest should be wider inciso-gingivally.

The rest should be located more toward the incisal edge.

The rest should be thicker buccolingually.

The rest should be located in a prepared rest seat.

Question #17

True or False

In the RPD shown to the right, the guide surface - guide plate contacts on the distal surfaces of teeth numbers 20 and 29 determine a definite path of displacement/dislodgement.

True

False

Question #18

True or False

The all plastic maxillary RPD should be avoided in all partial dentures except where the prosthesis is considered transitional and loss of the remaining teeth is imminent.

True

False

Question #19

True or False

Tooth-supported RPDs require physiologic relief of the guide plates.

True

False

Question #20

The superior border of a mandibular lingual bar major connector must be at least _____ mm below the gingival margins.

1-2

2-3

3-4

4-5

On to Questions 21 through 30