Several technical modifications based on the anatomical position of the neurovascular bundle and its bony mandibular canal have been developed, aiming to prevent injury to the intraalveolar nerve We hypothesized that the incidence of neurosensory disturbance (NSD) should be reduced using our bilateral sagittal split osteotomy (BSSO) technique, because direct intra-alveolar nerve injury can be avoided. The aim of this study was to introduce our modified BSSO technique and evaluate the subsequent incidence of postoperative neurosensory disturbance of the IAN.
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Incidence of NSD 12 months postoperatively in relation to IAN exposure during surgery
Timeframe: preoperative to at least 12 months after surgery or return of normal sensation; if no return of normal sensation, reevaluation after another 3 months with computer tomography and clinical exam