福州地区儿童下颌第一乳磨牙牙体及髓腔形态锥形线束CT研究  

Cone beam CT research on tooth hard tissue and pulp cavity morphology ofprimary mandibular first molars in children from Fuzhou region

作　　者：严峻 王松 YAN Jun;WANG Song(College of Clinical Medicine for Obstetrics&Gynecology and Pediatrics,Fwjian Medical University,Fujian Children'sHospital(Fujian Branch of Shanghai Children's Medical Center),Fuzhou,Fujian 350014,China)

机构地区：[1]福建省儿童医院(上海儿童医学中心福建医院)福建医科大学妇儿临床医学院,福州350014

出　　处：《福建医药杂志》2024年第7期20-24,共5页Fujian Medical Journal

摘　　要：目的使用锥形线束CT(CBCT)影像技术分析福州地区儿童下颌第一乳磨牙牙体及髓腔形态,为乳牙临床诊疗及相关教学、科研工作提供参考依据.方法共纳入福州地区119例患儿的CBCT影像,并使用Mimics、3-matic等软件分析牙体形态,对牙髓腔进行三维重建并进行数据分析,记录下颌第一乳磨牙根管数目及分布情况、根分叉处髓室高度、髓室顶及髓室底厚度,对比以上数据是否存在性别差异,统计牛牙样牙发生率.结果下颌第一乳磨牙近中2个根管、远中2个根管牙齿占比最高为48.8%,左右侧根管数量及分布相同的比例为81.8%,不同性别患儿的根管分布差异有统计学意义(P<0.05);不同性别患儿的根分叉处髓室顶、髓室底厚度及髓室高度差异均无统计学意义(P>0.05);牛牙样牙发生率为4.72%.结论本研究中福州地区下颌第一乳磨牙以近中2个根管、远中2个根管的类型最为常见,且多数患儿左右侧根管数量及分布情况相同.Objective To analyze tooth hard tissuc and pulp cavity morphology of primary mandibular first molar(PM-FM)in children from Fuzhou region by cone beam CT(CBCT),and to provide reference for clinical treatment and oral relatedtcaching and research work.Methods CECT images of 11l9 pediatric patients were included,and tooth morphology was analyzcedusing software such as Mimics and 3-matic.Pulp cavity was reconstructed in three dimensional and the data were analyzed.Thenumber and distribution of root canals,the height of the pulp chamber at the root bifurcation,and the thickncess of the pulpchamber roof and floor were recorded.The gender differences in the above data were compared,and the incidence of taur-odontism was analyzed statistically.Results The highest proportion of PMFM with two mesial and two distal root canals was48.8%,and the proportion of teeth with the same number and distribution of left and right root canals was 81.8%.There werestatistical differences in the number and distribution of root canals between different genders(P<0.05).There was no significant difference in the thickness of the roof and floor of pulp chamber and the hcight of the pulp chamber between different gen-ders(P>0.05).The incidence of taurodontism was 4.72.%.Conclusion In this study,the most common types of PMFM in Fuzhou region were two mesial and two distal root canals,and the number and distribution of left and right root canals were thesame in most cases.

关 键 词：下颌第一乳磨牙 锥形线束CT 根管 牙齿硬组织 

分 类 号：R788[医药卫生—口腔医学]