Journal of Maxillofacial and Oral Surgery

, Volume 16, Issue 4, pp 453–464 | Cite as

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

  • Khadar Vali Shaik
  • A. P. Mohan
  • Jeevan Kumar
  • Haripriya Chari
Research Paper


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.


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


Compliance with Ethical Standards

Conflict of interest

Khadar Shaik, A. P. Mohan, Jeevan and Haripriya declare that they have no conflict of interest.

Informed consent

Informed consent was obtained from all individual participants included in the study.


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Copyright information

© The Association of Oral and Maxillofacial Surgeons of India 2016

Authors and Affiliations

  • Khadar Vali Shaik
    • 1
  • A. P. Mohan
    • 1
  • Jeevan Kumar
    • 1
  • Haripriya Chari
    • 1
  1. 1.Department of Oral and Maxillofacial SurgeryKamineni Institute of Dental SciencesNarketpally, NalgondaIndia

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