AGD Prosthodontics: Fixed and Removable 3

Question 1

When preparing a tooth for a full-coverage metal-ceramic crown, the recommended axial reduction on the facial surface is:

Accepted Answer

1.2–1.5 mm

Answer

Facial reduction of 1.2–1.5 mm is required for porcelain-fused-to-metal crowns to provide adequate space for the metal substructure and overlying ceramic layer.

Question 2

A patient's maxillary complete denture has a high-pitched whistling sound during the 'S' sound. This indicates:

Accepted Answer

The closest speaking space is insufficient

Answer

A whistling sibilant 'S' sound indicates the anterior teeth are too close together, leaving insufficient speaking space for air to flow correctly.

Question 3

Which impression technique is most appropriate for a patient with a severely resorbed mandibular ridge for complete denture fabrication?

Accepted Answer

Custom tray with selective pressure technique

Answer

A custom tray with selective pressure (mucocompressive in stress-bearing areas, mucostatic elsewhere) maximizes stability and support over resorbed ridges.

Question 4

Posterior cantilever fixed partial dentures are contraindicated primarily because:

Accepted Answer

They create excessive torquing forces on the abutment tooth

Answer

Cantilever FPDs create lever-arm forces that apply torque and tipping moments to abutment teeth, risking periodontal damage and restoration failure.

Question 5

A patient with a Kennedy Class I removable partial denture reports that the denture drops during swallowing. The most appropriate adjustment is to:

Accepted Answer

Adjust the border extensions in the distal flange area

Answer

Overextended posterior flanges interfere with the action of the pterygomandibular raphe and buccinator muscle, causing the denture to unseat during swallowing.

(AGD) Academy of General Dentistry Certification Practice Test

(AGD) Academy of General Dentistry Certification Practice Test

AGD Prosthodontics: Fixed and Removable 3