Impacted /(?)/

Im·pact·ed

Impacted

a.
  1. Driven together or close.
  2. Grown in an abnormal direction so that it is wedged against another tooth and cannot erupt normally; -- of teeth, especially the third molar; as, to extract an impacted third molar. (Dentistry)

Phrases & Compounds
Impacted fracture
a fracture in which the fragments are driven into each other so as to be immovable.