阻生下颌第二磨牙下颌骨的三维分析
Three-dimensional analysis of the mandible with impacted mandibular second molar
作者：范炜, 高德国, 王宇婷, 厉丹丹, 王震东
Author：Fan Wei, Gao Deguo, Wang Yuting, Li Dandan, Wang Zhendong
收稿日期：2019-08-12 年卷（期）页码：2020,38(3):274-274-279
期刊名称：华西口腔医学杂志
Journal Name：West China Journal of Stomatology
关键字：三维测量,下颌第二磨牙阻生,下颌骨,退化,
Key words：three-dimensional measurement,impacted mandibular second molar,mandible,degeneration,
基金项目：江苏省口腔疾病研究重点实验室开放课题基金(JSKLOD-KF-1710);江苏高校优势学科建设工程资助项目(2018-87);江苏省“科教强卫工程”医学重点学科建设项目(zdxka2016026)
中文摘要
目的 研究阻生下颌第二磨牙患者下颌骨的发育和形态特征,并且通过三维测量和分析预测下颌发育的可能趋势。方法 筛选出阻生组和对照组各88例,利用Mimics软件建模进行三维测量,共确定了23个标记点和17个测量值,对测量值进行t检验分析。结果 阻生组中下颌体长度、第一磨牙后萌出间隙、下颌角间距和第一磨牙间宽的值低于对照组（P<0.05）,颌下角的值高于对照组（P<0.05）。结论 本研究发现下颌第二磨牙阻生患者的下颌骨呈现出在矢状向和宽度上的发育不足,下颌第二磨牙阻生是其退化的表现之一。
英文摘要
ObjectiveTo study the developmental and morphological characteristics of the mandible in patients with impacted mandibular second molar and to predict the possible trend of mandibular development via three-dimensional (3D) measurement and analysis.MethodsA total of 88 cases of impacted group and 88 cases of control group were screened out. 3D measurements were performed by using Mimics software. A total of 23 landmark points and 17 measurements were determined. The measurements were analyzed byt-test.ResultsThe mandible length, the space between the first molars, the space between mandibular angles, and the width between the first molars in the impacted group were lower than those in the control group (P<0 .05). moreover, the value of the submandibular angle was higher than that in the control group (P<0 .05).ConclusionThe impacted mandible of patients with mandibular second molar showed lack of sagittal and width development, and the impacted mandibular second molar was a manifestation of its degeneration.
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