摘要
目的应用CBCT观察桂西地区人群下颌第二磨牙牙根和根管的形态,为临床诊疗工作提供参考依据。方法符合纳入标准的564例患者下颌第二磨牙1128颗,应用Planmeca RomexisCBCT机及其自带的图像分析软件,统计分析患者各牙根、根管形态的性别、年龄和民族间差异及双侧牙根和根管对称情况。结果1128颗下颌第二磨牙中,壮族662颗,汉族384颗,其他民族82颗;双根型和C形根型占比较高,分别为73.94%和24.47%;双根型检出率男性高于女性,C形根型检出率女性高于男性(P<0.05);壮族人群的牙根分型主要以双根型为主(P<0.01)。双根型下颌第二磨牙的近中根IV型发生率最高(P<0.01),远中根I型发生率最高(P<0.01)。C形根管在根管口处较为连续,越向下,连续性越差:在根管口、根中部和根尖部三个不同水平面中,根管口以C1型为主,根中部和根尖部均以C3型为主(P<0.01)。双侧牙根和根管对称性的差异在不同性别组、年龄组、民族组间均具有统计学意义(P<0.05):男性高于女性,18~35岁年龄组较高,壮族比汉族高。结论桂西地区人群下颌第二磨牙牙根和根管形态复杂多变,壮族、汉族人群牙根分型以双根型为主,C形根也较多见,壮族人群双侧牙根和根管对称性高于汉族人群。
Objective To observe the root and root canal morphology of mandibular second molars in Western Guangxi by CBCT,to provide a reference for clinical diagnosis and treatment.Methods In total,564 patients’ 1 128 mandibular second molars that satisfy the inclusion criteria were analyzed with a planmecaromexis CBCT machine and its own image analysis software.The patients’ gender,age and ethnic differences in the root and canal morphology and the symmetry of the bilateral root and canal were statistically analyzed.Results Among the 1 128 mandibular second molars,662 were the Zhuang ethnic group and 384 were the Han ethnic group,and 82 were other ethnic groups;the double root type and C-shaped root type accounted for a relatively high proportion:73.94% and 24.47%,respectively.The detection rates of the double root type were higher in males than in females(P <0.05);the detection rates of the Cshaped root type were higher in females than in males(P <0.05);the root type of the teeth was mainly double-rooted in the Zhuang ethnic group(P<0.01).The incidence of type Ⅳ in the mesial root of the double root type mandibular second molar was the highest(P <0.01),and the incidence of type Ⅰ in the distal root was the highest(P <0.01).The Cshaped root canal is more continuous at the mouth of the root canal,more downward corresponds to a worse continuity:in three different levels of root canal orifice,root middle and root apex,the root canal orifice is dominated by the C1 type,and both root middle and root apex are mainly C3-type(P <0.01).The difference in symmetry of bilateral roots and root canals was statistically significant among different gender groups,age groups,and ethnic groups(P <0.05):there were more males than females,the results in the 18-35-year-old group and the Zhuang ethnic group were higher.Conclusion The root and root canal morphology of mandibular second molars in western Guangxi people are complex and changeable.The roots are mainly double root type in the Han ethnic group and the Zhuang ethnic group.C-sh
作者
邢慧妍
胡玉萍
蒋文琼
张然
韦方圆
覃艳宁
邓敏
黎淑芳
XING Huiyan;HU Yuping;JIANG Wenqiong;ZHANG Ran;WEI Fangyuan;TAN Yanning;DENG Min;LI Shufang(Department of Stomatology,Affiliated Hospital of Youjiang Medical College for Nationalities,Baise 533000,China)
出处
《口腔疾病防治》
2021年第12期836-842,共7页
Journal of Prevention and Treatment for Stomatological Diseases
基金
百色市科技计划项目(20184425)。
关键词
桂西地区
壮族
汉族
下颌第二磨牙
牙根
根管
锥形束CT
C形根管
对称性
western Guangxi
the Zhuang ethnic group
the Han ethnic group
mandibular second molar
root
root canal
cone⁃beam CT
C⁃shaped canal system
symmetry
