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KMID : 0355620090350010026
Journal of Korean Association of Oral and Maxillofacial Surgeons
2009 Volume.35 No. 1 p.26 ~ p.30
Cone-beam Computed Tomography Measurement of the Position of the Inferior Alveolar Nerve Canal in Mandibular Prognathism
Yun Sung-Hun

Park Ji-Young
Ko Young-Kyung
Park Je-Uk
Pyo Sung-Woon
Abstract
Background and Objectives: To determine the anatomic position of the inferior alveolar nerve (IAN) canal in patients with mandibular prognathismusing the cone-beam CT (CBCT).Materials and Methods: Fifty rami from 25 patients were evaluated. The images were taken by i-CAT and reconstructed 3-dimensionally using the Simplant 11 program. The linear distances between the IAN canal to the buccal cortex (a, a¢Ó and a¢Ó), from the IAN canal to the alveolar crest (b and b¢Ó) and the anterior margin (b¢Ó) and finally the buccal cortical thickness (c, c¢Ó and c¢Ó) were measured at three reference planes (VP, OP and HP). Results: On the left side, the average distance of a, b and c were 7.12, 15.96 and 3.60 mm on the VP plane, respectively. On the OP, the distance of a¢Ó, b¢Ó and c¢Ó was 6.11, 8.83 and 2.63 mm. For the HP, the distance of a¢Ó, b¢Ó and c¢Ó was 4.84, 10.11 and 2.30 mm. On the right side, the distance of a, b and c, on the VP, was 7.10, 16.13 and 3.42 mm, respectively. On the OP, the distance of a¢Ó, b¢Ó and c¢Ó was 4.77, 8.75 and 2.68 mm. On the HP, the distance of a¢Ó, b¢Ó and c¢Ó was 4.55, 9.84 and 2.38 mm. Regarding the difference between genders, the distance in male¡¯s was longer than female¡¯s on the VP (p=0.019), and was thicker in males than females on the HP (p=0.002). Conclusion: The CBCT data provided accurate information about the location and course of the IAN.
KEYWORD
Cone beam computed tomography, Inferior alveolar nerve, Mandibular prognathism
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