Surgical Orthodontic Treatment of Class III Malocclusion with Unilateral Open Bite Due to Impacted Premolar with Dilacerated Root: A Case Report

Dilacerated teeth may interfere with eruption and movement, making orthodontic treatment difficult.

This case report describes successful surgical orthodontic approaches for a 14-year-old girl with skeletal Class III malocclusion, a unilateral open bite caused by a severely dilacerated mandibular left first premolar, and severe crowding in the mandibular dentition. The patient underwent surgical subluxation of the dilacerated premolar, followed by a combination of non-extraction orthodontic therapy and orthognathic surgery.

A left lateral open bite caused by a severely dilated mandibular left first premolar was corrected through tooth traction after subluxation for root apical transection. Class I molar relationships and improved facial profiles were achieved with maxillary advancement, adjunctive counterclockwise mandibular rotation, and genioplasty.

This case report suggests using subluxation in severely dilacerated teeth to enable orthodontic tooth movement with high stability, thereby expanding the possibility of non-extraction treatment.