CBCT观察颏孔与下颌第二前磨牙根尖位置关系  

The position of the mental foramen and the apex of mandibular second premolar evaluated by Cone-beam computed tomography

作　　者：万盼[1] 韦健[1] 陈美玲[1] 马威[1] 马净植[1] 

机构地区：[1]华中科技大学同济医学院附属同济医院口腔医学中心,湖北武汉430030

出　　处：《临床口腔医学杂志》2015年第4期239-242,共4页Journal of Clinical Stomatology

摘　　要：目的:测量下牙槽神经管及颏孔与下颌第二前磨牙根尖位置关系,分析其分布规律,以期为显微根尖手术提供解剖学依据。方法:选取83例双侧锥形束CT(CBCT)图像,分析颏孔开口位置分布规律,并测量下牙槽神经管及颏孔与下颌第二前磨牙根尖位置关系。结果:颏孔到牙槽嵴顶、下颌骨下缘的平均距离分别为(12.96±1.91)mm、(13.24±1.57)mm;在曲面体层片上,下颌第二前磨牙根尖到颏孔的最短距离平均(2.64±1.61)mm;若颏孔位于下颌第一、二前磨牙之间或第一前磨牙下方时,下颌第二前磨牙根尖到下牙槽神经管的平均距离(5.35±2.05)mm。男女性别分组对比在颏孔下缘距下颌骨下缘、下颌第二前磨牙根尖到下牙槽神经管距离的平均值差异均有显著性(P<0.05)。结论:下颌第二前磨牙根尖与颏孔及下牙槽神经管关系密切,在进行下颌第二前磨牙的显微根尖手术过程中,应当给予充分重视。Objective：The present radiographic study aimed at assessing the location of the inferior alveolar nerve canal （IANC）,mental foramen （MF） and the apex of mandibular second premolar by using limited cone-beam computed tomography （CBCT）. Method：CBCT images of 83 patients （83 bilateral cases） were retrospectively screened to determine the locations of the apex of mandibular second premolar with respect to MF and IANC. Result： The mean distances from MF to alveolar crest and from MF to base of the mandible were （12.96±1.91）mm and （13.24±1.57）mm respectively. From panoramic radiographs, the mean minimum distance from the apex of mandibular second premolar to MF was （2.64±1.61） mm. If mental foramen was located below first premolar or located apically between first and second premolars,the mean distance from the apex of mandibular second premolar to IANC was （5.35 ±2.05） mm. There were statistically significant differences for gender （P＆lt;0.05）,regarding the distances from MF to base of the mandible and from the apex of mandibular second premolar to IANC respectively. Conclusion：According to this study,the locations of IANC and MF are significantly correlated with that of mandibular second premolar. During the endodontic microsurgery procedures, the relationship should be given adequate attention in the mandibular second premolar region.

关 键 词：颏孔 锥形束CT 下牙槽神经管 下颌第二前磨牙 

分 类 号：R816.98[医药卫生—放射医学]