NBDE Periodontics 2

Question 1

Which furcation classification indicates that a probe can pass completely through the furcation from one side to the other?

Accepted Answer

Class III

Answer

Class III furcation involvement means the probe passes completely through the furcation, though it may still be covered by soft tissue.

Question 2

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

Accepted Answer

Hemidesmosomes and a basal lamina

Answer

The junctional epithelium attaches to enamel and cementum through hemidesmosomes and an internal basal lamina.

Question 3

A patient has 6 mm probing depths, 2 mm of recession, and radiographic bone loss to the mid-root. What is the clinical attachment level (CAL)?

Accepted Answer

8 mm

Answer

CAL = probing depth + recession = 6 + 2 = 8 mm.

Question 4

Which systemic condition is most associated with aggressive generalized periodontitis in young patients due to neutrophil dysfunction?

Accepted Answer

Chediak-Higashi syndrome

Answer

Chediak-Higashi syndrome involves defective neutrophil chemotaxis and degranulation, predisposing to severe early-onset periodontitis.

Question 5

Scaling and root planing is best described as which type of periodontal therapy?

Accepted Answer

Cause-related (etiotropic) phase

Answer

Scaling and root planing is the cornerstone of cause-related (etiotropic) therapy, targeting the primary etiologic factor—bacterial plaque and calculus.

NBDE - National Board Dental Examination Practice Test

NBDE - National Board Dental Examination Practice Test

NBDE Periodontics 2