dilaceration

dilaceration /dī·las′ərā′shən/ [L. di-, apart or through + lacerare, to tear] , 1. a tearing apart, as of a cataract. 2. (in dentistry) a condition resulting from injury to a tooth during its developmental period or as a result of insufficient space for a tooth to develop, with a crease or band at the junction of the crown and root, or with tortuous roots having abnormal curvatures. Should not be confused with normal root curvature.

Dilaceration (Regezi, Sciubba, and Jordan, 2012)