论文部分内容阅读
目的 :应用锥形束CT(cone-beam computed tomography,CBCT)对患者下颌骨颏孔、副颏孔、下颌神经前环等结构进行测量分析,为颏孔区手术提供参考。方法:收集2015年1月—2015年8月在湘雅医院口腔医学中心就诊的287例汉族患者的CBCT图像,对颏孔区的解剖结构进行分析。采用SPSS17.0软件包对数据进行统计学分析。结果 :颏孔多位于下颌第二前磨牙根方及下颌前磨牙之间(分别为60.80%、30.14%);副颏孔的发生率为4.88%,多位于下颌第二前磨牙根方,颏孔上方及远中;下颌神经前环的发生率为89.20%,长度为(1.99±1.39)mm;下颌第二前磨牙根尖到下颌神经前环或下颌管的距离为(5.21±2.50)mm。结论:颏孔区域可有副颏孔;中国汉族人下颌神经前环的出现率较高,变异大,颏孔区手术时应予以高度重视。
OBJECTIVE: To measure and analyze the structure of mandibular mental foramen, accessory chin and mandibular anterior annulus by cone-beam computed tomography (CBCT), and to provide a reference for the operation of mental fontanel. Methods: CBCT images of 287 Han patients attending the Department of Stomatology, Xiangya Hospital from January 2015 to August 2015 were collected to analyze the anatomy of the mental fontanel. SPSS17.0 software package for statistical analysis of the data. Results: The majority of mental foramina were located between the root of the second premolar and mandibular premolar (60.80% and 30.14%, respectively). The incidence of palatal foramen was 4.88% The incidence of mandibular anterior annulus was 89.20% and the length was (1.99 ± 1.39) mm. The distance from the root of mandibular second premolar to mandibular anterior annulus or mandible was (5.21 ± 2.50) mm . CONCLUSION: There may be an accessory chin hole in the mental foramen region. The occurrence rate of mandibular anterior annulus in Chinese Han is high and varies greatly.