Analysis of outcomes and complications of 187 coronectomies

Abstract

IntroductionThis is a retrospective audit of 187 cases of coronectomies of mandibular third molars (M3M) carried out at a two large teaching hospitals in London. MethodsWe collected data from the electronic patient records on all mandibular third molar coronectomy procedures performed between April 2017 and November 2020. Data was collected on complications including dry socket, infection, re-operation and nerve injuries to the inferior dental and lingual nerves. Results187 coronectomies were performed on 153 patients during the study period. This represents approximately 3% of the total number of third molars managed surgically. Almost 80% of these cases had cone beam computed tomography imaging prior to surgery. The majority (64%) of cases performed under general anaesthetic. Seven consultants and their teams managed the patients. Over half of the patients were prescribed antibiotics post-operatively. Complications were as follows: dry socket 2.1%; infection 4%; re-operation 1.6%; lingual nerve injury 0.5%, inferior alveolar nerve injury 1%. Of these nerve injuries, only one (0.5%) was considered to be permanent after two years of follow up. One patient (0.5%) had roots removed 12 months after coronectomy. ConclusionWe found that coronectomy is a safe and effective modality for treating high risk mandibular third molars. Complication rates are similar to those seen from surgical removal of such teeth with a lower than expected incidence of nerve injuries.