Three dimensional survey of trend of inferior alveolar nerve canal and mandibular morphology by cone-beam CT between patients with mandibular deviation and normal individuals

Abstract

Abstract: PURPOSE: To analyze the intramandibular course and its adjacent anatomic structure of mandibular canal（MC） through the data of cone-beam computed tomography(CBCT),as well as the mandibular morphology, and compare with the general population to provide anatomical basis for mandibular surgery. METHODS: Twenty nine adults with mandible deviation were selected as the case group, and compared with 29 individuals with normal occlusion. CBCT scans were conducted, InVivo 5 software was used to reconstruct the mandible, anchor the points, measure the jaw shape and the three-dimensional course of MC. All measurements were analyzed with SSPS 17.0 software package, to determine the characteristics and differences in the mandibular morphology and the course of MC between different cases. RESULTS: ①BP in 0,1 and 2 plane of oblique side was significantly smaller than the control group(P<0.05);the maximal measurement value of LC in each level was the oblique side and the control was the minimal, the difference between the oblique side and the control in plane 5 was significant (P<0.01).②Compared with the contralateral side and the control, MC of oblique side was more closer to the buccal side and away from the lingual bone plate, the difference between the oblique side and the control at the first molar was significant(P<0.05).③The mandibular foramen locations, the length of the ramus and the body were all significantly different(P<0.05) between the 2 groups.④There was no significant difference between left and right side in the height,the width and the thickness of the cortical bone of the mandibular body at cross sections and three dimensional shape symmetry in the control group, but significant difference(P<0.05) in some measured values between the 2 groups. CONCLUSIONS: Compared with normal adult,the course of MC in patients with mandibular deviation was closer to the buccal plate; the length of the ramus and the body of oblique side is smaller than the contralateral side, the mandibular morphogenesis in patients with mandibular deviation is asymmetric with torsional deformation on the spatial structure.

Key words: Mandibular deviation, Mandibular canal, Mandible, CBCT

CLC Number:

R782.2

QU Wei-guo, SHENG Lan-lan, LI Yang, QU Zhen-yu, YUE Bai, WANG Ji. Three dimensional survey of trend of inferior alveolar nerve canal and mandibular morphology by cone-beam CT between patients with mandibular deviation and normal individuals[J]. China Journal of Oral and Maxillofacial Surgery, 2016, 14(4): 344-351.

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