下牙槽神经管走向的CBCT研究

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Abstract Objective To study the location in the mandible of mandibular canal by cone-beam computed tomography (CBCT). Methods Fifty healthy volunteers examined in the Stomatology Department of the Third People' Hospital of Zhenjiang City in Jiangsu Province from January 2014 to January 2015 were selected. The following data were collected: the distance from the inner contour of the canal to alveolar crest, the distance from the inner contour of the canal to the buccal and lingual surface of mandible, the distance from the superior border of the mandibular canal to alveolar crest and the distance from the inferior border of the mandibular canal to the inferior border of mandible. Results The mean distance from the inner contour of the canal to alveolar crest in the third molar section, the second molar section, the first molar section, the second premolar section, the first premolar section was (18.14±1.13) mm, (15.63±1.42) mm, (17.55±1.70) mm, (18.16±1.57) mm and (17.13±1.36) mm respectively. The distance from the inner contour of the canal to the buccal surface of mandible in the third molar section, the second molar section, the first molar section,the second premolar section and the first premolar section was (7.40±1.43) mm, (7.78±1.49) mm, (5.92±1.57) mm, (4.08±1.23) mm and (4.23±1.45) mm respectively. The distance from the inner contour of the canal to the lingual surface of mandible in the third molar section, the second molar section, the first molar section, the second premolar section and the first premolar section was (2.74±1.21) mm, (4.40±1.31) mm, (4.84±1.16) mm, (5.81±1.28) mm and (4.86±1.11) mm. The mandibular canal walking in the mandible went downward for a distance at first, and then went up. The distance from the inner contour of the canal to alveolar crest was shortest in the second molar section and was farthest in the second premolar section (P ＜ 0.01). There were statistical significances in every section between the buccal bone width and the lingual width. The lingual bone width was thinnest in the third molar section, and was thickest in the second premolar section (P ＜ 0.01). The mandibular canal was more close to the edge of mandible than alveolar crest (P ＜ 0.01). Conclusion The mandibular canal starts from the mandible foramen, walks forward and downward first, then turns to move upward and moves toward the buccal side in the second molar section. Finally it moves up to the mental foramen and walks out of the mandible.

Key words： CBCT Mandibular canal Alveolar crest

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	ZHONG Fei

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ZHONG Fei. Study of the walking line of mandibular canal by CBCT[J]. 中国医药导报, 2018, 15(6): 118-123.

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http://www.yiyaodaobao.com.cn/EN/ OR http://www.yiyaodaobao.com.cn/EN/Y2018/V15/I6/118

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