基于CBCT对汉族人下颌第一恒磨牙髓室高度及牙本质厚度与年龄关系的研究  

Correlations of pulp chamber height and dentine thickness of mandibular first molar with age in Chinese Han population based on cone beam computed tomography

作　　者：刘彦 牛忠英 王睿[2] 闫澍[2] 张建中[3] 汤楚华[2] 师苏萌 

机构地区：[1]解放军医学院,北京100853 [2]解放军第306医院全军口腔疾病诊治中心 [3]解放军第306医院病理科 [4]北京航天总医院口腔科

出　　处：《实用口腔医学杂志》2017年第3期381-384,共4页Journal of Practical Stomatology

基　　金：国家自然科学基金(编号:30872911)

摘　　要：目的:应用CBCT研究汉族人下颌第一恒磨牙髓室高度和牙本质厚度与年龄的关系。方法:收集汉族受试者420例(男、女各210例)下颌第一磨牙CBCT影像资料,分6组(15~24岁、25~34岁、35~44岁、45~54岁、55~64岁、65~74岁)。运用CBCT自带软件测量牙齿中轴线上髓室的高度和牙本质厚度,进行统计学分析。结果:髓室高度:男性(0.85±0.54)mm、女性(0.79±0.51)mm;髓室顶牙本质厚度:男性(3.60±0.49)mm,女性(3.50±0.49)mm;髓室底牙本质厚度:男性(2.57±0.52)mm,女性(2.49±0.51)mm,随年龄增长髓室高度减小,牙本质厚度增加,与年龄有相关关系(P<0.05),髓室底牙本质厚度增大速率明显高于髓室顶(P<0.05),性别间均无统计学差异(P>0.05)。结论:随年龄增长汉族人下颌第一磨牙髓室高度减小,牙本质厚度增大,髓室底牙本质厚度增加较髓室顶更明显。Objective：To investigate the relationship between pulp chamber height and dentine thickness of mandibular first molar on long axis with age in a Chinese Han population by cone-beam computed tomography（CBCT）.Methods：CBCT images of 420 Chinese Han subjects（210 males and 210 females） were divided into 6 age groups as follows：15-24,25-34,35-44,45-54,55-64 and 65-74 years（n=70,35 males and 35 females）.The height of pulp chamber and dentine thickness of the chamber root and floor of mandibular first permanent molar on long axis was measured by Galileo software of CBCT in vertical direction and then statistical analysis was carried out.Results：On long axis,the height of pulp chamber was （0.85±0.54） mm in males and （0.79±0.51） mm in females（P〉0.05）;dentine thickness of the pulp chamber roof was （3.60±0.49） mm in males and （3.50±0.49） mm in females（P〉0.05）;and dentine thickness of the pulp chamber floor was （2.57±0.52） mm in males and （2.49±0.5） mm in females（P〉0.05）.With aging,the height of pulp chamber was decreased（P〈0.05） and dentine thickness of mandibular first permanent molar on long axis was increased（P〈0.05）.Conclusion：In Chinese Han population,the of pulp chamber height of mandibular first permanent molar on long axis is related to age,The dentine thickness increased with ages,the increase of dentine thickness of pulp chamber floor is more significant than that of the roof.

关 键 词：CBCT 下颌第一恒磨牙 髓室 牙本质 年龄 

分 类 号：R781.05[医药卫生—口腔医学]