利用锥形束CT观察上颌第二恒磨牙牙根形态及近颊根第二根管发生率  

CBCT observation of root morphology and incidence of the second root in maxillary second permanent molars

作　　者：武洲 殷戬[1] 丁芳[1] WU Zhou;YIN Jian;DING Fang(Department of Stomatology,Beijing Anzhen Hospital,Capital Medical University,Beijing 100029,China)

机构地区：[1]首都医科大学附属北京安贞医院口腔科,100029

出　　处：《中华老年口腔医学杂志》2024年第2期90-94,共5页Chinese Journal of Geriatric Dentistry

摘　　要：目的利用锥形束CT(CBCT)观察上颌第二磨牙牙根形态及近颊根第二根管(MB2)发生率。方法收集2021年9月至2022年12月在北京安贞医院口腔科就诊患者的CBCT,以60岁为界分为青中年组(<60岁)及老年组(≥60岁),分别观察上颌第二磨牙牙根数量、牙根形态、根管数量、根管形态,参照Vertucci根管分类法对近颊根根管进行分类,并测量近颊根第一根管MB与腭根根管P、近颊根第二根管MB2及腭根根管P间距离;MB-P与MB-MB2连线夹角α,以及根管口至第一次根管分叉距离l。使用卡方检验及t检验对两组数据进行统计分析。结果137颗上颌第二恒磨牙中(青中年组70颗,老年组67颗),93颗(67.88%)为普通3根形态,44颗(32.12%)为其他牙根形态。41颗有MB2(29.93%)(青中年组20颗(28.57%),老年组21颗(31.34%),两组间MB2发生率差异无统计学意义(P>0.05),不同牙位、性别间MB2的发生率差异无统计学意义(P>0.05)。在有MB2的牙齿中,两组均以II型即2-1型根管最多见,两组间MB-P距离、MB2-P距离、MB-MB2距离、以及夹角α差异均无统计学意义(P>0.05),长度l平均为2.6 mm。结论上颌第二磨牙3根形态最多,老年患者MB2发生率与中青年人无异,治疗中应认真寻找MB2,以提高根管治疗成功率。Objective To observe the root morphology and root canal number of maxillary second molars by CBCT image interpretation,and to explore the incidence of MB2 and its ageing changes in maxillary second molars.Methods The CBCT of patients who visited Beijing Anzhen Hospital from September 2021 to June 2022 were collected,divided into two groups according to age at the age of 60 years,.The root number,root morphology,root canal number and root canal morphology of maxillary second molar were observed,and the proximal buccal root canal was classified according to Vertucci root canal classification.the distance between near buccal root MB and palatine root P,near buccal root second canal MB2 and palatal root P was measured.The angle between the MB-P and MB-MB2 lines isα,and the distance l from the root canal mouth to the first root canal bifurcation.The chi-square test and t-test were used to statistically analyze the two sets of data.Results Among the 137 maxillary second permanent molars(70 in young and middle-aged group and 67 in elderly group),93(67.88%)had ordinary three-root morphology,and the remaining 44(32.12%)had other root morphologies.41 teeth had MB2(29.93%)(20 in young and middle-aged group(28.57%)and 21 in elderly group(31.34%)).There was no significant difference in the incidence of MB2 between the two groups(P>0.05),and there was no significant difference in the incidence of MB2 between different tooth positions and genders(P>0.05).In the teeth with MB2,type II(2-1 type)root canal was the most common in the two groups.There was no significant difference in the MB-P distance,MB2-P distance,MB-MB2 distance,and the angleαbetween the two groups(P>0.05).The length l averages 2.6 mm.Conclusion The incidence of MB2 in elderly patients is no different from that in young and middle-aged patients.MB2 should be carefully sought in the treatment to improve the success rate of root canal treatment.

关 键 词：上颌第二恒磨牙 锥形束CT 近颊根第二根管 根管治疗 

分 类 号：R781.05[医药卫生—口腔医学]