Oligodontia

Definition: The developmental absence of multiple teeth (typically six or more, excluding third molars).

Radiographic Features:

• Location: Can affect any area of maxilla or mandible
• Appearance: Absence of tooth/teeth in expected locations
• Number: Multiple missing teeth (usually 6 or more)

Key points:

• Most commonly affected teeth (in order):
  1. Third molars
  2. Second premolars
  3. Maxillary lateral incisors
  4. Mandibular central incisors
• Differentiate from:
  • Anodontia (complete absence of teeth)
  • Hypodontia (absence of 1-5 teeth)

Clinical significance:

• May require prosthodontic or orthodontic intervention
• Can be associated with certain syndromes
• Early diagnosis allows for better treatment planning

Note: Confirm diagnosis by considering patient age and normal eruption timelines to rule out delayed tooth development.