AGD Prosthodontics: Fixed and Removable Questions and Answers

Question 1

A 65-year-old patient requires a new maxillary complete denture.
Upon delivery, the patient immediately complains of a persistent gagging sensation.
Clinical examination reveals the denture is stable and retentive.
Which of the following is the most probable cause of the patient's complaint?

Accepted Answer

The posterior border of the denture is overextended onto the soft palate.

Answer

The vertical dimension of occlusion is excessive.

Answer

The buccal flanges are underextended, compromising the peripheral seal.

Answer

The post-palatal seal is insufficiently compressed.

Question 2

A patient requires a three-unit fixed partial denture to replace tooth #30. According to Ante's Law, which of the following principles must be met for abutment selection?

Accepted Answer

The combined root surface area of the abutment teeth should be equal to or greater than that of the tooth being replaced.

Answer

The crown-to-root ratio of the abutment teeth must be at least 1:1.

Answer

The abutment teeth must be vital and free of any endodontic treatment.

Answer

The combined buccolingual width of the abutments must exceed the width of the pontic.

Question 3

When designing a fixed partial denture for a posterior, non-esthetic area, which pontic design is considered the most hygienic due to its lack of contact with the residual ridge?

Accepted Answer

Sanitary (or hygienic)

Answer

Modified ridge lap

Answer

Ovate

Answer

Saddle (or ridge lap)

Question 4

A patient presents with a Kennedy Class I removable partial denture (RPD) opposing a complete denture. What is the primary function of an indirect retainer in this RPD design?

Accepted Answer

To counteract lifting forces on the distal extension bases.

Answer

To provide the primary occlusal support for the prosthesis.

Answer

To directly engage an undercut for retention.

Answer

To stabilize the abutment teeth against mesial drifting.

Question 5

A patient with limited interocclusal clearance (less than 1.0 mm) on a mandibular second molar requires a full coverage crown. The patient has a history of bruxism. Which of the following materials is most suitable for this situation?

Accepted Answer

Full-contour zirconia

Answer

Feldspathic porcelain

Answer

Lithium disilicate

Answer

Leucite-reinforced ceramic

Question 6

For a mandibular Kennedy Class I removable partial denture using the canines as the terminal abutments, which clasp assembly is specifically designed to be 'stress-releasing' by minimizing torquing forces on the abutment teeth during function?

Accepted Answer

An RPI system (mesial Rest, Proximal plate, I-bar clasp).

Answer

A cast circumferential (Akers) clasp with a distal rest.

Answer

A double embrasure clasp engaging both the canine and lateral incisor.

Answer

A ring clasp originating on the mesiolingual surface.