Influence of Anatomic Position and Intraoperative Exposure of the Inferior Alveolar Nerve on Neurosensory Disturbance After Sagittal Split Ramus Osteotomy: A Three-Dimensional Computed Tomography Study

Publication date: Available online 23 April 2016
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Jee Ho Lee, Young Jin Son, Jong Hyun Hwang, Seung Hee Baek, Ju Hong Jeon
ObjectiveTo evaluate the influence of the anatomic position and intraoperative exposure of inferior alveolar nerve on neurosensory disturbance (NSD) in sagittal split ramus osteotomy (SSRO).Study DesignThe anatomic factors of the nerve were measured on preoperative 3DCT in 98 patients. The intraoperative nerve exposure was assessed. NSD was evaluated for one year after surgery. The correlations between NSD and the factors were analyzed.ResultsThe NSD decreased as the lateral marrow space from the nerve increased (P < 0.01). The complete nerve exposure increased NSD 7.6-times (P = 0.01). The nerve exposure increased as the buccal plate thickness increased (P = 0.01), and decreased as the vertical marrow space from the nerve increased (P = 0.01).ConclusionsThe nerve exposure and the lateral marrow space from the nerve affected NSD. The buccal plate thickness and the vertical marrow space indirectly affected NSD through nerve exposure.



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