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J Maxillofac Oral Surg. 2017 Dec;16(4):453-464. doi: 10.1007/s12663-016-0985-4. Epub 2016 Dec 28.

Pre-operative Assessment of Anatomical Position of Inferior Alveolar Nerve and Its Significance in Bilateral Sagittal Split Osteotomy.

Journal of maxillofacial and oral surgery

Khadar Vali Shaik, A P Mohan, Jeevan Kumar, Haripriya Chari

Affiliations

  1. Department of Oral and Maxillofacial Surgery, Kamineni Institute of Dental Sciences, Narketpally, Nalgonda, Telangana India.

PMID: 29038628 PMCID: PMC5628070 DOI: 10.1007/s12663-016-0985-4

Abstract

The aim of this study is to investigate the position and course of the mandibular canal through the ramus, angle and body of mandible using computed tomographic (CT) imaging pre-operatively and to relate these predetermined values intra-operatively to perform sagittal split ramus osteotomies. Pre-operative CT scans were taken and four points were marked at mandibular foramen, mandibular angle, mandibular body and midpoint and different dimensions of IAN were measured to localize the inferior alveolar nerve. With the obtained values, precise osteotomy cuts were made intra-operatively and intra-operative measurements for position of IAN were noted. Based on the preoperative CT measurements, the chance to encounter IAN bundle, during surgery was evaluated. The present study proved that pre-operative CT imaging prior to BSSO surgical procedure is an effective way to investigate the position and course of the IAN canal through the framework of the mandible and by interpolating these dimensions intra operatively, reduces the risk of direct injury to the IAN bundle.

Keywords: Bilateral sagittal split osteotomy; CT scan; Inferior alveolar nerve; Mandibular canal; Paresthesia

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