壮族人群恒前牙根管弯曲度测定  

Survey of root canal curvature of anterior teeth from Chuang population

作　　者：刘芳[1] 王淑芳[1] 赵守亮[1] 

机构地区：[1]同济大学口腔医院牙体牙髓科,上海200072

出　　处：《华西口腔医学杂志》2009年第5期505-508,共4页West China Journal of Stomatology

基　　金：国家"十五"科技攻关计划资助项目(2004BA720A23)

摘　　要：目的了解壮族人群恒前牙的根管弯曲情况。方法收集新鲜拔除的壮族人群恒前牙245颗,采用间接影像学手段观察其根管类型和弯曲形状,在Schneider法和Sch覿fer法的基础上,结合电子测量尺软件测量分析218颗Ⅰ型根管牙齿的弯曲度、弯曲半径和弯曲长度。结果壮族人群恒前牙以Ⅰ型根管为主,有13颗下颌中切牙和12颗下颌侧切牙为Ⅱ、Ⅲ、Ⅳ型根管。上颌中切牙、侧切牙、尖牙以及下颌中切牙、侧切牙、尖牙Ⅰ型根管近远中向弯曲发生率分别为40%、80%、77%、65%、66%、73%,唇舌(腭)向弯曲发生率分别为62%、69%、70%、62%、41%、61%。弯曲部位多在根尖1/3,多为中度弯曲;上颌尖牙在近远中向上的根管弯曲度最大,下颌尖牙在唇舌(腭)向上的根管弯曲度最大;上颌侧切牙在近远中和唇舌(腭)2个方向上的根管弯曲半径及弯曲长度均较小。结论壮族人群恒前牙根管弯曲情况较复杂,其下颌切牙Ⅱ、Ⅲ、Ⅳ型根管发生率较高。Objective To investigate the root canal curvature of permanent anterior teeth from Chuang population. Methods 245 anterior teeth from Chuang population were collected and examined by X-ray radiography both from labiolingual and mesiodistal directions. For 218 type I anterior teeth, degree of root canal curvature, radius of curvature and length of the curved part of root canal were measured by a special electronic vernier caliper according to Schneider＇s and Schafer＇s method and the data obtained were analyzed. Results Root canals of anterior teeth from Chuang population were mainly of type Ⅰ. The number of type Ⅱ, Ⅲ, Ⅳ were about 13 in mandibular central and 12 in mandibular lateral incisors. The incidence of curvature in maxillary central incisors, lateral incisors, canines and mandibular central incisors, lateral incisors, canines were 40%, 80%, 77%, 65%, 66%, 73% in mesiodistal directions, 62%, 69%, 70%, 62%, 41%, 61% in labiolingual directions respectively. The most curvature was moderate and happened in apical third. The heaviest curvature occurred in maxillary canines in mesiodistal direction and mandibular canines in labiolingual direction. The shortest radius and length of curvature occurred in maxillary lateral incisors. Conclusion Root canal curvature of anterior tooth in Guangxi Chuang population is complex. The incidence of type Ⅱ, Ⅲ,Ⅳ is high in mandibular incisors.

关 键 词：壮族人群 恒前牙 根管弯曲度 间接影像学 

分 类 号：R781.05[医药卫生—口腔医学]