AGD Periodontics and Gum Disease 4

Question 1

According to the 2017 World Workshop classification, Stage III periodontitis is distinguished from Stage II by:

Accepted Answer

Tooth loss due to periodontitis or complexity factors like vertical bone loss ≥33%

Answer

Stage III introduces complexity factors such as vertical bone loss ≥33%, furcation Class II or III, or tooth loss attributable to periodontitis, distinguishing it from Stage II.

Question 2

Chlorhexidine gluconate reduces supragingival plaque primarily through which mechanism?

Accepted Answer

Disrupting bacterial cell membranes by binding to negatively charged sites

Answer

Chlorhexidine is a cationic bis-biguanide that binds to negatively charged bacterial cell membranes, causing cytoplasmic leakage and cell death.

Question 3

A connective tissue graft placed under a coronally advanced flap is the gold standard for treating which type of gingival recession?

Accepted Answer

Miller Class I and Class II recession

Answer

Miller Class I and II recessions have intact interdental bone and tissue, allowing predictable complete root coverage with a subepithelial connective tissue graft under a coronally advanced flap.

Question 4

Enamel matrix derivative (Emdogain) is derived from which biological source and promotes periodontal regeneration by:

Accepted Answer

Porcine enamel; mimicking cementogenesis and PDL fiber formation

Answer

Emdogain contains amelogenin proteins derived from developing porcine teeth that mimic the developmental process of cementum and PDL formation to promote periodontal regeneration.

Question 5

Which systemic condition most directly impairs neutrophil chemotaxis and is strongly associated with early-onset severe periodontitis in children?

Accepted Answer

Papillon-Lefèvre syndrome

Answer

Papillon-Lefèvre syndrome involves mutations in cathepsin C causing severe neutrophil dysfunction and results in aggressive periodontal destruction and premature tooth loss in children.

(AGD) Academy of General Dentistry Certification Practice Test

(AGD) Academy of General Dentistry Certification Practice Test

AGD Periodontics and Gum Disease 4