CBCT评价下颌第三磨牙引导管与阻生状态的研究  

Shape of Gubernacular Canals in Relation to Impaction of Mandibular Third Molars Assessed by CBCT

作　　者：刘培 王芳[1] 李波[1] 魏丽丽[1] 程勇[1] LIU Pei;WANG Fang;LI Bo;WEI Lili;CHENG Yong(The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, Department of Radiology, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China)

机构地区：[1]武汉大学口腔医学院放射科,湖北省口腔基础医学重点实验室-省部共建国家重点实验室培育基地和口腔生物医学教育部重点实验室,湖北武汉430079

出　　处：《口腔医学研究》2020年第9期821-824,共4页Journal of Oral Science Research

基　　金：国家自然科学基金(编号:81500878)。

摘　　要：目的:采用CBCT评价下颌第三磨牙引导管的形态,探究其与阻生状态的关系,为预测第三磨牙是否阻生提供依据。方法:选取76例下颌第三磨牙的CBCT影像资料,测量其引导管长径、短径、长短径之比及其与牙胚长轴的角度,并对测量数据进行统计分析。结果:不同阻生状态下颌第三磨牙的引导管之间,长径、短径和长短径之比无统计学差异,与牙胚长轴的角度:正常萌出>近中阻生>水平阻生。下颌第三磨牙引导管的长径、短径及其与牙胚长轴的角度与年龄相关。结论:CBCT可以精确评价引导管形态,不同阻生状态的第三磨牙引导管与牙胚长轴的角度不同。引导管的缺失和/或与牙胚长轴的角度异常,提示牙齿可能出现萌出异常。Objective:To evaluate the shape of gubernacular canals(GCs)and its relation to impaction of mandibular third molars by CBCT.Methods:76 CBCT image data of mandibular third molars were included.The long diameter,short diameter,ratio of them,and angulation of GCs to tooth axis were measured and analyzed.Results:There was no statistical difference in long diameter,short diameter,and ratio of them between the groups.The angulation of GCs to tooth axis:normal eruption>mesioangular impaction>horizontal impaction.The long diameter,short diameter,and angulation of GCs to tooth axis were related to the age in mandibular third molars.Conclusion:CBCT can accurately measure the shape of GCs.The angulation of GCs to tooth axis differs in mandibular third molars with different impactions.The absence of GCs,and/or an abnormal angle to the long axis of the tooth may suggest the abnormal eruption.

关 键 词：锥形束CT 下颌第三磨牙 引导管 阻生 

分 类 号：R78[医药卫生—口腔医学]