下颌骨颏孔位置的CBCT研究

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摘要目的应用锥形束CT（CBCT）研究下颌骨颏孔的位置和颏管的走行。方法选取江苏省镇江市第三人民医院口腔科2014年1月~2015年5月征集的50名健康受测者，常规拍摄CBCT，测量颏管上缘与竖垂线的交角、颏孔位置、颏孔顶壁到牙槽嵴的垂直距离和颏孔底壁到下颌骨缘的垂直距离。结果颏孔位置位于第二双尖牙牙根下方的有27例（54.00%），颏管与竖垂线的平均交角为（46.0±2.3）°。颏孔上缘到牙槽嵴的垂直距离为（16.88±1.44）mm，颏孔下缘到下颌骨缘的垂直距离为（8.95±1.98）mm，颏孔上缘至牙槽嵴顶的距离大于颏孔下缘到下颌骨下缘的距离（P < 0.05）。结论锥形束CT可以精确测量颏孔的位置；颏孔位于下颌第二前磨牙牙根下方的较多见；下牙槽神经大多是从下颌双尖牙区域的根方向前、向上、向外经颏孔出下颌骨。

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	钟飞

关键词 ：锥形束CT, 颏孔, 颏管

Abstract：Objective To study the location of the mental foramen and the course of mental canal by cone-beam computed tomography (CBCT). Methods From January 2014 to May 2015, 50 healthy subjects from Department of Stomatology, The Third People′ Hospital of Zhenjiang City were collected. They were detected by CBCT, and the angle between the mental canal and the vertical curve, the location of the mental foramen, the distance from the superior border of the mental foramen to alveolar crest and the distance from the inferior border of the mental foramen to the inferior border of mandible were measured. Results There were 27 cases of mental foramen located at the bottom of the second bicuspid tooth root, accounted for 54.00%. The mean angle between the mental canal and the vertical curve was (46.0±2.3)°. The mean distance from the superior border of the mental foramen to alveolar crest was (16.88±1.44) mm, the mean distance from the inferior border of the mental foramen to the inferior border of mandible was (8.95±1.98) mm. The distance from the superior border of the mental foramen to alveolar crest was greater than the distance from the inferior border of the mental foramen to the inferior border of mandible (P < 0.05). Conclusion CBCT can accurately measure the position change of the mental formen. The mental foramen is mainly located in the root of the mandibular second premolar. The inferior alveolar nerve mostly comes from the mandibular second premolar forward, upward and outward through the mental foramen.

Key words： Cone-beam computed tomography Mental foramen Mental canal

基金资助:苏省镇江市社会发展项目（SH2014058）。

作者简介: 钟飞（1973.10-），男，硕士，副主任医师，江苏省镇江市第三人民医院口腔科主任；研究方向：口腔种植。

引用本文:

钟飞. 下颌骨颏孔位置的CBCT研究[J]. 中国医药导报, 2018, 15(3): 114-117.
ZHONG Fei. The study of the location of the mental canal by CBCT. 中国医药导报, 2018, 15(3): 114-117.

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http://www.yiyaodaobao.com.cn/CN/ 或 http://www.yiyaodaobao.com.cn/CN/Y2018/V15/I3/114

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