Factors influencing neurosensory disturbance after bilateral sagittal split osteotomy: retrospective analysis after 6 and 12 months.

Objective: The aim of this study was to analyze several factors regarding their possible influence on neurosensory disturbance (NSD) of the inferior alveolar nerve (IAN) after bilateral sagittal split osteotomy (BSSO).

Study Design: We investigated the possible influence of sex, age at the time of surgery, total operating time, intraoperative nerve encounter, advancement versus setback, fixation method, additional genioplasty, side, and region (lower lip vs. chin) on subjective neurosensory outcome a half-year after surgery.