AGD Prosthodontics: Fixed and Removable 2

Question 1

Which cement is most appropriate for final cementation of a metal-ceramic crown on a vital tooth with a short clinical crown?

Accepted Answer

Resin-modified glass ionomer

Answer

Zinc oxide eugenol

Answer

Zinc phosphate

Answer

Polycarboxylate

Question 2

A patient presents with a Kennedy Class II partial denture that has significant rocking movement. The most likely cause is:

Accepted Answer

Lack of indirect retainers

Answer

Inadequate number of clasps

Answer

Poor occlusal rest seat preparation

Answer

Excessive undercut engagement

Question 3

The biologic width in a healthy periodontium averages approximately:

Accepted Answer

2.04 mm

Answer

0.5 mm

Answer

1.0 mm

Answer

3.5 mm

Question 4

When fabricating a complete denture, the vertical dimension of occlusion is best evaluated by:

Accepted Answer

Using a combination of methods including physiologic rest position and phonetics

Answer

Measuring phonetics of sibilant sounds only

Answer

Relying solely on the closest speaking space

Answer

Comparing with pre-extraction records only

Question 5

Which of the following clasp assemblies provides the most favorable stress distribution for a distal-extension removable partial denture?

Accepted Answer

RPI (rest, proximal plate, I-bar) clasp system

Answer

Circumferential clasp on the mesial of the abutment

Answer

Ring clasp engaging the distolingual undercut

Answer

Back-action clasp on the buccal surface

Question 6

A porcelain-fused-to-metal crown shows a gray discoloration at the gingival margin six months after cementation. The most likely cause is:

Accepted Answer

Gingival recession exposing the metal substructure

Answer

Inadequate porcelain thickness over the metal collar

Answer

Secondary caries at the margin

Answer

Sulcular fluid staining the luting cement

Question 7

The primary purpose of a surveyor in removable partial denture design is to:

Accepted Answer

Determine the path of insertion and identify usable undercuts

Answer

Measure the amount of bone support for abutment teeth

Answer

Evaluate the occlusal vertical dimension

Answer

Assess the need for tooth preparation