The condition of being tightly wedged together. Food impaction can occur between the teeth due to an open contact, a poorly contoured restoration, or the plunger effect of opposing teeth. Tooth impaction occurs when a tooth is prevented from erupting into a fully functional position. The preventing agent can be another tooth, alveolar bone, or soft tissues. The most commonly impacted teeth are third molars, second premolars, and canines; the impacted tooth may lie in a variety of different positions.
Types of impacted lower third molars