RPD Review Questions

Questions 101-110


Question #101

A "bead" line"

is used only on mandibular major connectors

is a seal at the interface of framework metal and tissues

should taper off as it approaches the marginal gingiva of the abutment teeth

both 2 and 3 above

 


Question 102

Your patient has the partially edentulous arch shown in the illustration on the left. Tooth #28 has the survey line and undercut shown in the illustration on the right. There are no contraindications to any type of clasp or to any rest location. What would be your first choice for the clasp assembly on tooth #28?

distal rest and cast circumferential clasp

distal rest and WW circumferential clasp

distal rest and I-bar clasp

distal rest and modified T-bar clasp

 


Question 103

Your patient has the partially edentulous arch shown in the left illustration. Tooth #28 has the survey line and undercut shown in the illustration on the right. There are no contraindications to any type of clasp or to any rest location. What would be the most common choice for the clasp assembly on tooth #28?

distal rest and cast circumferential clasp

distal rest and WW circumferential clasp

distal rest and I-bar clasp

distal rest and modified T-bar clasp

 


Question 104

The superior border of a mandibular lingual bar major connector should be

at least 3 mm from the tooth/tissue junction

at least 2 mm from the tooth/tissue junction

located at the tooth/tissue junction

at least 3 mm above the tooth/tissue junction

 


Question 105

The internal finish line is

the butt joint between the metal and plastic on the tissue side of the edentulous area

the butt joint between the metal and plastic on the outer surface of the RPD

a type of posterior palatal seal

a special type of bead line

 


Question 106

A class I modification 0 RPD normally has how many clasps?

1

2

3

4

 


Question 107

Select a maxillary major connector for the large Class III modification 1 RPD shown to the right. The residual ridges are good and the abutment teeth are strong.

Palatal strap

Modified palatal plate

Horse-shoe

Anterior-posterior palatal strap

 


Question 108

True or False

When an RPD is fully seated, the tips of the clasp arms should exert very light pressure against the abutment teeth.

True

False

 


Question 109

Your patient's partially edentulous arch form is shown in the left illustration. The clasp assembly for tooth #20 is illustrated on the right. When is the retentive arm activated?

When the patient bites down on the extension base.

When there is an attempt to dislodge the RPD.

When the extension base moves toward the tissues.

It should never be activated.

 


Question 110

True or False

Guide plates for tooth-supported RPDs may extend above the height of contour while those on extension RPDs should not.

True

False

 


On to Questions 111 through 120