【摘要】 目的通过观察锥形束CT(CBCT)数字影像对重庆地区人群下颌前牙的根管形态、牙根数目及根面沟发生情况进行分析。方法选择重庆医科大学附属口腔医院2013年1月~4月就诊患者的CBCT数据,通过i-CAT软件对其轴面、矢状面、冠状面进行分析,记录其根管形态、牙根数目及根面沟发生情况。结果 1 725例患者的锥形束CT数字影像(男923例,女802例),共9 646颗下颌前牙纳入研究。9 646颗下颌前牙Vertucci根管形态分类,中切牙全部为单根牙,侧切牙中0.3%(11/3 257)为双根牙,尖牙中有0.8%(26/3 014)为双根牙,3.8%(127/3 375)中切牙、10.6%(345/3 257)侧切牙、4.2%(127/3 014)尖牙为多根管牙,其余均为单根管牙,下颌前牙双根管构型多为TypeⅢ。下颌前牙同一根管类型及根面沟在左右侧发生率相近,差异无统计学意义(P>0.05);女性下颌侧切牙多根管发生率(11.9%)大于男性(9.4%),差异具有统计学意义(P<0.05);各年龄组下颌中切牙、侧切牙和尖牙双根管率最高的分别为21~岁组(5.0%,27/542),41~岁组(14.7%,91/619),41~岁组(8.1%,52/643);下颌前牙根面沟发生率最高的年龄组为51~岁组(8.1%,33/406)。结论重庆地区人下颌前牙根管系统中多根管、双牙根及根面沟的发生率较高,根管类型多样,多根管发生率兼有性别差异。通过对根管系统的了解,有助于提高根管治疗的成功率。更多还原

【Abstract】 Objective To investigate the root canal morphology and number,and radicular grooves(RGs)of mandibular anterior teeth in a Chongqing population in China by using cone beam computed tomography(CBCT).Methods Cone-beam computed tomographic images of mandibular anterior teeth were collected from patients who were treated at the Affiliated Hospital of Stomatology of Chongqing Medical University between January and April in 2013.The axial,sagittal and coronal planes of each tooth were analyzed by i-CAT software.The number of root canals,the canal configurations and RGs were examined.Results CBCT images of 1 725patients(males:923,females:802)were obtained and a total of 9 646 mandibular anterior teeth were analyzed.It was found that 0.3%(11/3 257)lateral incisors and 0.8%(26/3 014)canines had double roots.3.8%(127/3 375)central incisors,10.6%(345/3 257)lateral incisors and 4.2%(127/3 014)canines had multiple canals.No statistically significant differences were noted in canal morphology and morbidity rate of RGs between left and right mandibular anterior teeth(P>0.05).The incidence of multi-canal lateral incisors was significantly higer in females than in males.The frequency of doule canals was 5.0%in central incisors for 21-years group,14.7%in lateral incisors for 41-years group and 8.1%in canines for 41-years group.The frequency of RGs was highest in 51-years group(8.1%,33/406).Vertucei type was the most prevalent in mandibular anterior teeth.Conclusion The mandibular anterior teeth in this Chongqing population have a high incidence of multiple canals,double roots and RGs.There are a variety of types of root canals.The incidence of multiple canals has gender differences.The success rate of treatment can be improved by understanding the root canal system.更多还原