AGD Prosthodontics: Fixed and Removable 4

Question 1

When evaluating a patient for implant-supported prosthetics, the minimum bone height above the inferior alveolar nerve for a mandibular implant is generally considered to be:

Accepted Answer

2 mm

Answer

A minimum of 2 mm of bone between the implant apex and the inferior alveolar nerve is required to prevent nerve injury, though most clinicians prefer more.

Question 2

Acrylic resin denture teeth wear much faster than porcelain teeth. The primary clinical significance of this fact is:

Accepted Answer

Wear of acrylic teeth can reduce vertical dimension of occlusion over time

Answer

Progressive occlusal wear of acrylic denture teeth reduces the vertical dimension of occlusion, leading to overclosure, TMD symptoms, and poor esthetics.

Question 3

The most common cause of fracture of a maxillary complete denture along the midline is:

Accepted Answer

Flexural fatigue from repeated bending during function

Answer

The maxillary denture flexes during function due to the resilient palatal mucosa acting as a fulcrum, causing repeated bending stress and fatigue fracture at the midline.

Question 4

A provisional restoration is left in place for several months before the final impression. The primary risk associated with this practice is:

Accepted Answer

Gingival overgrowth and margin migration affecting the finish line

Answer

Prolonged temporization can allow gingival tissue changes—either overgrowth onto the finish line or recession—complicating the final impression and fit.

Question 5

The phenomenon of 'combination syndrome' is associated with:

Accepted Answer

A maxillary complete denture opposing a mandibular Class I RPD with natural anteriors

Answer

Combination syndrome occurs when a maxillary complete denture opposes mandibular natural anterior teeth and a distal-extension RPD, causing bone loss in the anterior maxilla and posterior mandible.

(AGD) Academy of General Dentistry Certification Practice Test

(AGD) Academy of General Dentistry Certification Practice Test

AGD Prosthodontics: Fixed and Removable 4