AGD Periodontics and Gum Health 2

Question 1

Which cytokine is primarily responsible for bone resorption in periodontal disease?

Accepted Answer

Interleukin-1β

Answer

IL-1β is a key pro-inflammatory cytokine that stimulates osteoclast activity and drives alveolar bone resorption in periodontal disease.

Question 2

A patient presents with 5–6 mm pockets and horizontal bone loss. Which classification stage best describes this presentation?

Accepted Answer

Stage II

Answer

Stage II periodontitis features probing depths of 5–6 mm with horizontal bone loss up to one-third of root length.

Question 3

The junctional epithelium attaches to the tooth surface via which structure?

Accepted Answer

Hemidesmosomes and basal lamina

Answer

Junctional epithelium attaches to enamel and cementum through hemidesmosomes combined with an internal basal lamina.

Question 4

Which organism is most associated with aggressive (Grade C) periodontitis in young patients?

Accepted Answer

Aggregatibacter actinomycetemcomitans

Answer

Aggregatibacter actinomycetemcomitans (Aa) produces leukotoxin and is the primary pathogen associated with Grade C periodontitis in adolescents.

Question 5

Which type of gingival fiber group runs from the cementum coronally to the free gingiva?

Accepted Answer

Dentogingival

Answer

Dentogingival fibers extend from the cervical cementum outward and coronally into the free and attached gingiva.

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