Three-dimensional reconstruction of the mandibular canal and its clinical significance
FU Sheng-Qi, FAN Ti-Yi, MIAO Ying-Ying, HU Wei, DAO Jing, DENG Xiao-Hui
Chinese Journal of Clinical Anatomy ›› 2011, Vol. 29 ›› Issue (4) : 375-377.
Three-dimensional reconstruction of the mandibular canal and its clinical significance
Objective To provide anatomic basis for the mandibular dental implantation. Methods 20 volunteers with healthy teeth were selected and scanned in series by spiral CT from the orbitomeatal line (OML). The mandibular canal was reconstructed by the curve-planar reconstruction(CPR) under the ADW 4.2 software. The position and composition of mandibular canal were observed, followed by the measurement of the distance from the dental root of mandibular posterior teeth to the superior wall of mandibular canal. The visual model of mandible and mandibular canal were reconstructed by the Amira 3D software. The course of mandibular canal in the diaphanous mandible and the relationship of mandibular posterior teeth with it were detected. Results The mandibular canal was composed of a thin compact bone and traveled through the bottom of lingual side of the molar and buccal side of the premolar. The lingual side of the madibular canal was thicker than that of other sides. In the diaphanous mandible, the mandibular canal could be clearly displayed, including its position, shape and course, and the distances from the mandibular canal to the inferior edge of mandibular body, alveolar crest and the medial, lateral plates of mandible respectively. The distance from the dental root of second molar to the mandibular canal was the nearest than that of the others, and the followed was the second molar, first molar, third molar, second premolar and first premolar by the near and far. The distance was nearer from the distal root of mandibular molar to the mandibular canal than that of the mesial root. The nearest distance from the dental root of first premolar, second premolar, first molar, second molar, third molar to the superior wall of mandibular canal were (8.38±1.04) mm(left) and (8.44±1.05) mm(right), (7.51±0.85) mm, (3.40±0.65) mm, (2.93±0.61) mm, (3.92±0.63) mm(left) and (3.97±0.63) mm(right) separately. Conclusions Three-dimensional reconstruction and analysis of mandibular canal is valuable for choosing appropriate length of dental implantation and avoiding to injury the inferior alveolar nerve during the operation.
Mandibular canal / Three-dimensional reconstruction / Visualization / Dental implantation
[1] 付升旗, 范锡印, 刘恒兴, 等. 下颌管与下颌后牙的位置关系及临床意义
[J]. 中国临床解剖学杂志, 2009, 27 (6): 651- 653.
[2] Obradovic O, Todorovic L, Pesic V, et al. Morphomtric analysis of mandibular canal: clinical aspect
[J]. Bull Goup Int Rech Sci Stomatol Odontol, 1998, 36 (1): 109 -113.
[3] 吴银洲，胡圣望. 100例下颌骨下颌管形态及其至牙槽嵴距离的观测研究
[J]. 中国口腔种植学杂志, 2005, 10(1): 15-17.
[4] Tsuji Y, Muto T, Kawakami J, et al. Computed tomographic analysis of the position and course of the mandibular canal: relevance to the sagittal spilt ramus osteotomy
[J]. Int J Oral Maxillofac Surg, 2005, 34 (3): 243-246.
[5] 赵保东，李宁毅，周仰光，等. 下颌骨的三维重建及实体解剖研究
[J]. 华西口腔医学杂志, 2002, 20(1): 21-23.
[6] Jiro N, Kensaku M, Takayuki K, et al. Quantification and visualization of alveolar bone resorption from 3D dental CT image
[J]. Int J Comput Assist Radiol Surg, 2007, 2(1): 43-53.
[7] Emanuela D, Erik B. Anatomic research on the perioral muscles, functional matrix of the maxillary and mandibular bones
[J]. Surg Radiol Anat, 2006, 28(3): 261-266.
[8] 张庆福, 吕春堂, 刘国勤, 等. 下颌骨三维重建效果的测量分析研究
[J]. 解放军医学杂志, 2006, 31 (11): 1050-1052.
[9] Spitzer V, Ackerman MJ, Scherzinger AL, et al. The visible human male: A technical report
[J]. J Am Med Inform Assoc, 1996, 3(1): 118-130.
[10] 李宁毅，马彦博，谷芳，等. 数字化可视下颌骨的初步研究
[J]. 华西口腔医学杂志，2007, 25(1): 83-85.
[11] 孟翔峰，陈建刚，李清，等. 牙种植体植入方向在修复设计与颌骨骨量间的差异
[J]. 临床口腔医学杂志, 2002, 18(1): 38-39.
[12] 徐 明, 章作玲. 螺旋CT三维重建用于正畸埋伏牙定位的临床研究
[J]. 广东牙病防治, 2008, 16 (1): 25-27.
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