Abstract: Objective: To determine the anatomical position of the mandibular mental foramen in normal adults. Methods: 200 healthy adults provided informed consents were comprised and CBCT examination were performed. The coronal section of the image was selected and magnified. Nerve canal was stained to determine the location and pathway. Mental foramen center (A point) to labial alveolar crest (B point ), mental foramen center (A point) to the intersection of mandibular labial edge downward connection with BA(C point) were measured. AB / BC, AC / BC ratio were calculated. Results:  Longitudinal location of mental foramen was in the mid of mandibular body slightly near the upper edge. Transversal anatomical position of majority of mental foramen were located  between  the first and the second premolars; minority of mantal foramen were located between the second premolar and first molar. Conclusion: The results of the present study may be helpful and considered by practioners in clinical dentistry.

Key words: mental foramen, distance, molar

摘要： 目的：在锥形束CT冠状面上，通过对200例正常人颏孔位置的测量，来确定颏孔的正常位置。方法：在200例锥形束CT冠状面上，通过神经管的染色，来确定颏孔的位置；同时测量颏孔中心（A点）到唇侧牙槽嵴顶（B点）的距离，颏孔中心（A点）到唇侧下颌骨下缘与B?鄄A向下连线的交点(C点)的距离，并计算AB/BC、AC/BC的比值。统计颏孔位于在下颌第一、二前磨牙根尖，下颌第二前磨牙根尖及下颌第一磨牙根尖的例数。结果：颏孔位于下颌骨上下缘之间略偏上方；颏孔位于下颌第一、第二前磨牙之间者居多，位于下颌第二前磨牙及下颌第一磨牙根尖部者较少。结论：通过对颏孔正常位置的测量，对临床医生在进行手术操作时保护血管和神经起到一定的指导作用。

关键词:  , 颏孔, 距离, 磨牙

CLC Number: 

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• R782