文章摘要
王嘉艺,王 珊,王 林.CBCT三维头影测量关于面部对称性标记点可靠性的研究[J].南京医科大学学报,2017,(4):447~451
CBCT三维头影测量关于面部对称性标记点可靠性的研究
A research on the measurement reliability of facial symmetry landmarks by three-dimensional cephalometry with CBCT
投稿时间:2016-11-30  
DOI:10.7655/NYDXBNS20170413
中文关键词: CBCT  头影测量  面部对称性  标记点
英文关键词: CBCT  cephalometry  facial symmetry  landmarks
基金项目:国家自然科学基金(81230022);江苏省临床医学专项(b12014073)
作者单位
王嘉艺 南京医科大学附属口腔医院正畸科江苏 南京 210029 
王 珊 南京医科大学附属口腔医院正畸科江苏 南京 210029 
王 林 南京医科大学附属口腔医院正畸科江苏 南京 210029 
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中文摘要:
      目的:评估锥形束CT(CBCT)对面部对称性标记点识别的可靠性,为日后建立面部对称性的正畸三维头影测量分析提供参考。方法:对57例正畸患者,使用mimics10.0软件对其CBCT图像采用多平面重建法(矢状向、水平向和冠状向联合定点)标定28个与面部对称性相关的标记点。本研究共2位观察者,每位重复定点3次,分别间隔2周和4周。计算每个标记点的各个维度坐标值的组间和组内相关系数,以评估观察者内部以及观察者之间的定点的可靠性。结果:蝶鞍影像的中心(S)、枕骨大孔前缘之中点(Ba)、硬腭后部骨棘之尖(PNS)、前颅底筛板正中型同鸡冠的骨性结构的中心点(Cg)、鼻额缝的最前点(N)、左右侧蝶骨小翼的最外侧缘[Antcr(L,R)]、左右侧额骨、鼻骨和泪骨交界处[D’(L,R)]、左右侧眶下孔点[K(L,R)]、左右侧上颌牙槽嵴处最凹点[Maz(L,R)]、左右侧眶下缘之最低点[Or(L,R)]、[Zyg(L,R)]、左右侧髁突的顶点[Cd(L,R)]的可靠性良好,可用于CBCT三维头影测量面部对称性的分析。结论:本研究28个面部对称性相关标记点中有19个标记点的可靠性良好,具有临床实用价值。
英文摘要:
      Objective:To evaluate the reliability of cone-beam computed tomography (CBCT) on identification of facial symmetry landmarks,and provide evidences for the measurement and analysis of three-dimensional facial symmetry. Methods:The CBCT images of 57 orthodontic patients were measured by multi planar reconstruction (sagittal,axial and coronal to the point) by using mimics 10.0 software to calibrate 28 facial symmetry related landmarks. There were 2 observers in this study,each observer had repeated 3 times with 2 weeks and 4 weeks intervals,respectively. The intra- and inter-class correlation coefficient (ICC) of each dimension coordinate value of each landmark was calculated to evaluate the reliability of the landmarks for intra-observer and inter-observer. Results:The ICCs of Ba,PNS,Cg,N,Antcr (L,R),D'(L,R),K (L,R),Maz (L,R),Or (L,R),Zyg (L,R),Cd (L,R) were with high reliability,and could be used for the analysis of CBCT three-dimensional cephalometry of facial symmetry. Conclusion:In this study,there are 19 in 28 facial symmetry related landmarks with high reliability,which are of great value in clinical practice.
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