下颌前磨牙C形根管的锥形束CT研究  

Cone-beam computed tomography study of C-shaped root canal of mandibular premolars

作　　者：孔倩颖 梁立中[2] KONG Qianying;LIANG Lizhong(Department of Oral Implantology,Zhuhai Stomatology Hospital,Zhuhai 519000,China;Department of Stomatology,The Fifth Affiliated Hospital of Sun Yat⁃sen University,Zhuhai 519000,China)

机构地区：[1]珠海市口腔医院种植科,广东珠海519000 [2]中山大学附属第五医院口腔科,广东珠海519000

出　　处：《口腔疾病防治》2020年第2期88-92,共5页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：广东省科技发展专项资金（公益研究与能力建设方向）项目计划（2016A020215031）

摘　　要：目的采用锥形束CT(cone⁃beam computed tomography,CBCT)研究下颌前磨牙C形根管的发生率以及根管解剖形态,为临床诊疗提供参考。方法收集508例患者共964颗下颌第一前磨牙,907颗下颌第二前磨牙的CBCT扫描数据,分析下颌前磨牙的根管形态及类型,C形根管的发生率、双侧对称性、解剖形态、根面沟位置。结果下颌第一前磨牙C形根管发生率为4.1%,下颌第二前磨牙C形根管发生率为0.6%,差异有统计学意义(c2=25.775,P<0.001)。下颌第一前磨牙C形根管双侧对称率为29%,下颌第二前磨牙无对称C形根管发生。C形根管各种构型在根管中的分布存在差异(P<0.001),C形根管下颌前磨牙的根管上段均未发现C形形态,多为圆形或椭圆形单根,C形构型主要存在于下颌前磨牙的根管中段和根尖段,以C2型多见。纳入研究的下颌前磨牙中,最常见的根管类型为VertucciⅠ单根管型,在下颌第一前磨牙和下颌第二前磨牙发生率分别为81.7%和98.3%,两者差异有统计学意义(c2=140.544,P<0.001)。而下颌第一前磨牙的其他根管类型较下颌第二前磨牙多发,其VertucciⅡ、Ⅲ、Ⅳ、Ⅴ、C形根管发生率均高于下颌第二前磨牙(P<0.001)。C形根管下颌前磨牙均存在根面沟,位置大多位于近中舌侧。结论下颌前磨牙C形根管形态复杂,CBCT可为临床诊疗提供直观准确的影像学依据。Objective To investigate the incidence and morphology of C⁃shaped root canals in mandibular premo⁃lars by cone⁃beam computed tomography(CBCT)imaging,which provides a reference for clinical diagnosis and treat⁃ment.Methods The CBCT scanning data of 964 mandibular first premolars and 907 mandibular second premolars in 508 cases were collected,and the root canal morphology,incidence of C⁃shaped root canals,bilateral symmetry and lo⁃cation of radicular grooves were analyzed.Results The incidence of C⁃shaped root canals in mandibular first premo⁃lars was 4.1%and that in mandibular second premolars was 0.6%.The incidence of C⁃shaped root canals of mandibular first premolars was significantly higher than that of mandibular second premolars(c2=25.775,P<0.001).The symmet⁃rical ratio of C⁃shaped root canals in the mandibular first premolars was 29%.There were no symmetrical C⁃shaped root canals in the mandibular second premolars.There were significant differences in the distribution of the C⁃shaped root canal configuration in the root canal(P<0.001).The C⁃shaped configuration mainly existed in the middle axial and api⁃cal level of the mandibular premolars.The C2 type was more common.No C⁃shape was found in the coronal level of the mandibular premolars.Vertucci I single tube type was the most common type of root canal for the mandibular premolars included in this study;the incidences were 81.7%and 98.3%for the mandibular first and second premolars,respective⁃ly,and the difference was statistically significant(c2=140.544,P<0.001).The other root canal types of mandibular first premolars were more than those of mandibular second premolars.The incidences of VertucciⅡ,Ⅲ,Ⅳ,andⅤand C⁃shaped root canals in mandibular first premolars were significantly higher than those in mandibular second pre⁃molars.C⁃shaped root canal mandibular premolars had radicular grooves,and most of them were located at the mesiolin⁃gual side.Conclusion The morphology of the C⁃shaped root canal in mandibul

关 键 词：C形根管 根管形态 Vertucci分类 下颌第一前磨牙 下颌第二前磨牙 锥形束CT 解剖形态 根面沟 

分 类 号：R781.05[医药卫生—口腔医学]