Mimics软件在颧骨复合体骨折三维CT图像中的测量与应用

目的探讨单侧颧骨复合体骨折移位的CT测量方法并用于指导临床手术。方法收集需要手术治疗的单侧颧骨复合体骨折患者20例,术前摄颌面部三维CT,利用Mimics软件对双侧颧骨复合体与邻近骨骼解剖标志点中选取的同样两点之间的距离和选取同样的三点之间的角度进行测量分析,计算患侧与健侧之间的差值,以此为骨折移位数据指导手术。术后复查CT并测量各段距离和角度,评价复位效果。结果1）颧骨复合体骨折时,颧骨体骨折块多向后、向内移位。术后患侧与健侧比较,骨折段移位距离差值减少至2 mm以内,角度差值减少至1°以内,复位达到三维对称,开口及咬合功能恢复好,手术效果满意。2）健侧的颧弓突点水平角和颧突点水平角数据呈正态分布,分别为138.50°±1.15°和132.72°±0.89°。结论三维CT测量可以实现对颧骨复合体空间移位的定量测量,对颧骨复合体骨折的手术复位具有指导意义。

Clinical application of mimics software in three dimensional CT images for treatment of zygomatic complex fracture

Objective To study a reliable CT measuring method for quantitative diagnosis of unilateral zygomatic complex fracture and operation guiding.Methods 20 zygomatic complex fracture patients needed operation were col-lected,three dimensional CT images of all patients were measured and analyzed by Mimics software before operation.Standard anatomy points of bilateral zygomatic complex and adjacent bone were selected,then the distance of two same selected points and the angles of three same selected points were measured by Mimics software.Compared to unin-jured side,the different value of the distance and the angle of injured side zygomatic complex were acquired,zygomatic complex fractures were operated based on the different value.All patients were examined by three dimensional CT post-operatively,and the different value of the distance and the angle of both side were measured using same method to pre-operation.Therapy effects were analyzed based on the data of different value of the distance and the angle.Results 1)The displacement of zygoma of most patients was backward and inward.The different value of the distance between uninjured and injured side was less than 2 mm,and the different value of the angle was less than 1°.All patients reached the three-dimensional symmetric,surgical results were satisfactory in recovery of occlusion and mouth opening.2)The zygomatic arch protrusion angle was about 138.50°±1.15°,zygomatic prominent angle was about 132.72°±0.89°.The two data were normal distribution.Conclusion Three dimensional CT measurements of zygomatic complex can be achieved for the quantitative measurement of spatial displacement,and have directive significance for the reduction of the zygomatic complex fractures.