岭南地区广府民系人群上颌第二恒磨牙牙根和根管形态的CBCT研究  

CBCT study on root and root canal morphology of maxillary second permanent molars in the Guangfu population in the Lingnan area

作　　者：黎祺 黄少宏[1] LI Qi;HUANG Shaohong(Stomatological Hospital of Southern Medical University,Guangzhou 510280, China;Zhaoqing Medical College, Zhaoqing 526020, China)

机构地区：[1]南方医科大学口腔医院,广东广州510280 [2].肇庆医学高等专科学校,广东肇庆526020

出　　处：《口腔疾病防治》2019年第6期381-386,共6页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：广东省教育厅高水平大学建设经费南方医科大学临床研究项目(LC2017PY001);广东省教育厅自然科学特色创新类项目(2017KTSCX036)

摘　　要：目的研究岭南地区广府民系人群上颌第二恒磨牙的牙根和根管形态。方法收集广府民系患者723份CBCT影像学资料,共1 220颗上颌第二恒磨牙,观察其牙根和根管形态,比较和分析其形态特征和变异情况。结果上颌第二恒磨牙的牙根形态:单根型68颗、双根型417颗、三根型709颗、四根型26颗,各根型检出率在不同性别和年龄组的差异均无统计学意义(P> 0.05)。上颌第二恒磨牙的根管形态:单根型以Ⅷ型(3-3)为主,占63.23%;双根型不同融合根的根管形态分布差异具有统计学意义(P <0.01);三根型近颊根的根管形态以Ⅰ型(1-1)为主,占78.84%,Ⅰ型、Ⅳ型(2-2)根管分布情况在不同年龄组和性别间的差异均有统计学意义(P <0.01)。上颌第二恒磨牙双侧牙根形态对称性达75.86%,双侧牙根和根管形态对称性达73.64%。结论岭南地区广府民系人群上颌第二恒磨牙牙根及根管形态特征与国内外其他地区人群有一定差异性。Objective To research the root and root canal morphology of maxillary second permanent molars in the Guangfu population of the Lingnan area. Methods A total of 1220 maxillary second permanent molars were collected from the 723 CBCT images of the Guangfu population. The root and root canal configurations were observed and counted, and the morphological characteristics and changes were compared and analyzed. Results The maxillary second permanent molars included 709 three-root molars, 417 double root molars, 68 single root molars and 26 four-root molars. The difference in the detection rate of each root type in different sex and age groups was not statistically significant(P > 0.05). Root canal morphdogy of maxillary second permanent molars: type Ⅷ(3-3) was the most common type of root canals in single root molars, accounting for 63.25%. Significant differences in the detection rates of canal configurations were noted among the three subtypes of fused root canals in double root molars(P < 0.01). Root canal morphology of the mesiobuccal root of the three-root molars was mainly typeⅠ(1-1), significantly accounting for 78.84%. Significant sex and age differences were noted in the detection rate of type Ⅰ and Ⅳ root canals(P < 0.01). In addition,75.86% of maxillary second permanent molars had symmetrical roots, and 73.64% of the bilateral teeth had symmetrical roots and canals. Conclusion The root and root canal morphology of maxillary second permanent molars in the Guangfu population in the Lingnan area are different compared with other areas at home and abroad.

关 键 词：上颌第二恒磨牙 牙根 根管 CBCT 广府民系 

分 类 号：R781[医药卫生—口腔医学]