INBDE Periodontics 1 — Questions and Answers
Question 1: Periodontal probing depth is measured from the:
- Cemento-enamel junction to the alveolar crest
- Gingival margin to the base of the pocket (Correct answer)
- Alveolar crest to the base of the pocket
- Mucogingival junction to the gingival margin
Correct answer: Gingival margin to the base of the pocket
Probing depth is the distance from the free gingival margin to the base of the periodontal pocket or sulcus.
Question 2: Which bacteria is most strongly associated with adult chronic periodontitis?
- Streptococcus mutans
- Porphyromonas gingivalis (Correct answer)
- Actinomyces viscosus
- Fusobacterium nucleatum
Correct answer: Porphyromonas gingivalis
Porphyromonas gingivalis is a keystone pathogen in chronic periodontitis, producing virulence factors including gingipains that disrupt the host immune response.
Question 3: The biologic width refers to the combined measurement of:
- Sulcus depth and attached gingiva
- Junctional epithelium and connective tissue attachment above the alveolar crest (Correct answer)
- Gingival margin to alveolar crest
- Free gingival groove to mucogingival junction
Correct answer: Junctional epithelium and connective tissue attachment above the alveolar crest
The biologic width (~2.04 mm) consists of the junctional epithelium (~0.97 mm) and supracrestal connective tissue attachment (~1.07 mm) above the alveolar bone crest.
Question 4: Which furcation classification indicates that the furcation can be completely probed through from one side to the other?
- Class I
- Class II
- Class III (Correct answer)
- Class IV
Correct answer: Class III
Class III (through-and-through) furcation involvement means the probe passes completely through the furcation from the buccal to lingual/palatal surface.
Question 5: Aggressive periodontitis in young patients is most commonly associated with which organism?
- Treponema denticola
- Tannerella forsythia
- Aggregatibacter actinomycetemcomitans (Correct answer)
- Prevotella intermedia
Correct answer: Aggregatibacter actinomycetemcomitans
Aggregatibacter actinomycetemcomitans (Aa) is strongly associated with localized aggressive periodontitis, particularly in adolescents and young adults.
Question 6: Which systemic condition is most strongly associated with an increased risk of periodontitis?
- Hypothyroidism
- Type 2 diabetes mellitus (Correct answer)
- Osteoporosis
- Hyperlipidemia
Correct answer: Type 2 diabetes mellitus
Type 2 diabetes mellitus significantly increases the risk and severity of periodontitis through impaired neutrophil function, advanced glycation end-products, and altered wound healing.
INBDE Periodontics 1
Periodontal probing depth is measured from the: