Which classification terms describe the number of congenitally missing teeth? Hypodontia / Oligodontia / Anodontia — match each to its definition:

Correct answer: B. Hypodontia = fewer than 6 missing; Oligodontia = 6 or more missing (excluding 3rd molars); Anodontia = complete absence of all teeth

• A. Anodontia is total absence, not fewer than 6.
• B. Correct. The classification: HYPODONTIA = congenitally missing FEWER THAN 6 teeth (excluding third molars). OLIGODONTIA = congenitally missing 6 OR MORE teeth (excluding third molars) — more severe. ANODONTIA = complete congenital absence of ALL teeth (very rare; seen in ectodermal dysplasia). These are clinically important distinctions when managing patients with congenital missing teeth and planning prosthodontic rehabilitation.
• C. They are distinct classification terms with specific numeric thresholds.
• D. The definitions in option B are reversed — hypodontia is fewer, oligodontia is more.