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.