CBCT三维头影测量关于面部对称性标记点可靠性的研究

发布时间：2018-02-09 14:04

  本文关键词： CBCT 头影测量 面部对称性 标记点　出处：《南京医科大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【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。
[Abstract]:Objective: to evaluate the reliability of CT-CBCTs in recognition of facial symmetry markers, and to provide a reference for the establishment of orthodontic 3D cephalometric analysis of facial symmetry. Methods: 57 orthodontic patients were studied. Multiplanar reconstruction (sagittal, horizontal and coronal points) was used to calibrate 28 marker points related to facial symmetry using mimics10.0 software. The correlation coefficients between groups and within groups were calculated for each dimension coordinate value of each marker point. To assess the reliability of internal and inter-observer sites. Results: central Scroll in the Sella sellae image, Bajiao in the anterior margin of the foramen magnum, PNSS in the posterior part of the hard palate, and bony structure of the anterior skull base sieve plate. The centerpoint is Cgus, the anterior point of the suture of the nose and forehead, the lateral edge of the flank of the left and right sphenoid bones [Antcrus Lnr], the left and right frontal bones, At the junction of the nasal bone and the lacrimal bone, the left and right infraorbital foramen point [KGN], the most concave point at the left and right maxillary alveolar ridge, the lowest point of the left and right orbital lower margin, [ZygLRR], the apex of the left and right condyle [CDU LJ R], the reliability of the left and right condyle is good. Conclusion: 19 of 28 facial symmetry markers in this study have good reliability and clinical value.
【作者单位】： 南京医科大学附属口腔医院正畸科;
【基金】：国家自然科学基金(81230022) 江苏省临床医学专项(b12014073)
【分类号】：R783.5
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本文编号：1498099