Title: Unexpected sequalae following transection of a diminutive inferior alveolar nerve: A case report
Abstract:
Nerve injury is a well-documented complication of orthognathic surgery, and inferior alveolar nerve injury accounts for the majority of post-operative complications following a bilateral sagittal split osteotomy (BSSO). (1) We present a case whereby there was an iatrogenic transection of the inferior alveolar nerve, with a remarkable fully sensate lower lip and chin on the associated side immediately post-operatively. Imaging demonstrated a diminutive IAN canal and mental foramen on the affected side, which supports the idea that sensation may have been maintained via cross-innervation from the contralateral side. Interestingly, the contralateral side demonstrated mild hypoaesthesia so cross-innervation to a fully sensate side is less plausible. Here, we explore potential anatomical variations that may explain maintained sensation following complete transection of the IAN.
Audience Take Away:
- Understand variations in mental nerve and foramen anatomy
- Be aware of the implications of varying surgical anatomy
