小腿假肢接受腔计算机三维模型的构建

Three-dimensional modeling of leg prosthetic socket by computer

背景:假肢接受腔作为截肢患者肢体残端和假肢之间载荷传递的惟一通道,是影响假肢适配性的重要部件。假肢接受腔的三维建模是接受腔实用性的关键,可以在测量时得到更准确的数据。目的:建立假肢接受腔计算机三维模型,为接受腔有限元分析提供数据基础,为加工制造接受腔提供可靠的参数。方法:选择1例32岁右侧小腿截肢的男性患者,髋关节各肌力正常,髋18°屈曲挛缩,其他关节活动度正常。根据患者CT和核磁共振扫描图像,采用Mimics10.0软件处理数据,构建假肢接受腔计算机三维模型,准确模拟残肢和接受腔的结构。结果与结论:建立的小腿残肢和接受腔计算机三维模型比较准确地反映了接受腔和残肢的几何特征和外部轮廓。假肢接受腔三维模型的建立有助于提高制作的成功率,从根本上改变传统依靠手工设计、测量、取型、修型等落后的生产模式。

BACKGROUND：Prosthetic socket as the only passage to transfer load between patient affected limb and prosthesis significantly influence matching degree of the prosthesis.Three-dimensional modeling of prosthetic socket is important for socket utility to obtain accurate data.OBJECTIVE：To establish the three-dimensional model of prosthetic socket by computer to provide data for prosthetic socket finite element analysis and provide reliable parameter for processing prosthetic socket.METHODS：One male patient,32 years old,undergoing below knee amputation,was selected,with normal hip muscle strength,18° flexion contracture,and normal other joint activity.According to CT and MRI,data were processed using the Mimics10.0 software to construct three-dimensional model of the prosthetic socket and accurately simulate the residual limb and prosthetic socket structure.RESULTS AND CONCLUSION：The three-dimensional models of the prosthetic socket and residual limb accurately displayed geometry characteristic and exterior outline.The establishment of prosthetic socket is helpful to improve manufacture success ratio,fundamentally changes the traditional manual design,measurement,sampling and repair.