三维配准方法评价下颌后退手术后上呼吸道的形态学变化

发布时间：2018-11-17 07:10

【摘要】：目的本研究拟在介绍基于颧弓的三维配准评价下颌后退手术后上呼吸道形态学变化的一种方法。方法选择1例行下颌后退手术的24岁男性患者作为研究对象,分别在治疗前(T0)、治疗后1周(T1)和治疗后1年零5个月(T2)拍摄锥形束CT(CBCT)。应用MIMICS16.0软件将不同时期的CBCT扫描数据重构为颌面骨骼和上呼吸道的三维模型,然后以立体模型(STL)格式输出。在不同时期每个立体模型两侧的颧骨、颧弓和上颌骨额突上选择标志点进行点对点配准。配准完成后,在同一横截面上,测量不同时期4个不同平面上呼吸道的前后向长度(APL)、最大横向宽度(LTW)和横截面积(CSA),同时计算出口咽和喉咽的容积。最后以矢状面窗口三维模型轮廓线上不同时期下齿槽座点(B点)间距离为准测量下颌骨移动的距离。结果 T1期上呼吸道有明显地减少,T2期有轻微地复发。手术后T1期下颌B点与手术前T0期下颌B点间距离较大,手术后T2期下颌B点与手术前T0期下颌B点间距离比手术后T1期下颌B点与手术前T0期下颌B点间距离略有减少。结论基于颧弓的三维配准方法可以评价手术后及手术后期上呼吸道形态学变化。
[Abstract]:Objective to evaluate the morphologic changes of upper respiratory tract after mandibular retrogression by three-dimensional registration based on zygomatic arch. Methods A 24-year-old male who underwent mandibular retrograde surgery was selected to photograph conical CT (CBCT). Before treatment (T0), 1 week after treatment (T1) and 1 year and 5 months after treatment (T2). MIMICS16.0 software was used to reconstruct CBCT scanning data from different periods into three dimensional models of maxillofacial bones and upper respiratory tract, and then output them in (STL) format. The zygomatic bones, zygomatic arch and maxillary frontal process were selected for point-to-point registration in each stereoscopic model at different stages. After registration, the maximal transverse width (LTW) and cross-sectional area (CSA),) of (APL), in four different levels of upper respiratory tract in different periods were measured at the same cross section to calculate the volume of oropharynx and larynx simultaneously. Finally, the distance between the grooves (B points) at different periods on the outline of the sagittal window 3D model is used to measure the distance of mandibular movement. Results there was a significant decrease in the upper respiratory tract and a slight recurrence in T 2 stage. After operation, the distance between mandibular B point at T1 stage and mandibular B point before operation was larger, and the distance between mandibular B point at T2 stage and mandibular B point before operation was slightly lower than that between mandibular B point at T1 stage and mandibular B point before operation. Conclusion the three-dimensional registration method based on zygomatic arch can be used to evaluate the morphologic changes of upper respiratory tract after and after operation.
【作者单位】：山东大学口腔医院口腔正畸科;山东大学口腔医院口腔颌面外科;
【基金】：山东省科技计划项目合作研究(2007GG30002027,2010G0020232,2010HM053,21350005071301) 山东大学交叉学科项目(2011JC009,2012JC031)
【分类号】：R783.5

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