Quantifying wear depth in hip prostheses using a 3D optical scanner.
Quantifying wear depth in hip prostheses using a 3D optical scanner.
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DOI：
10.1016/j.wear.2017.10.008
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发表时间：
2018-01-15
期刊：
影响因子：
--
通讯作者：
Lujan TJ
中科院分区：
文献类型：
--
作者：
Hollar KA;Ferguson DS;Everingham JB;Helms JL;Warburton KJ;Lujan TJ
髋关节假体磨损深度的可视化可以帮助评估新的轴承材料和植入物设计。本研究的目的是开发一种准确、快速和经济的方法，使用结构光3D光学扫描系统生成髋关节植入物磨损深度的比色图。使用已知磨损深度的参考块确定这种新技术的准确度和精度。然后使用该技术测量犬髋关节表面置换器械（包含高度交联聚乙烯内衬）的体外磨损。3D光学扫描仪的平均精度为2.1 µm，平均精度为1.4 µm，当测量20 µm或更大的磨损深度时，误差小于10%。扫描仪能够在20分钟或更短时间内重复生成高度交联聚乙烯内衬磨损深度的3D比色图。这些比色图识别出磨损深度比平均磨损深度大3倍的局部区域，并显示出具有不对称磨损模式的内衬。本研究首次验证了使用3D光学扫描来量化髋关节置换器械的体外表面磨损。
The visualization of wear depth in hip prostheses can assist the evaluation of new bearing materials and implant designs. The goal of this study was to develop an accurate, fast, and economical methodology to generate colorimetric maps of wear depth in hip implants using a structured light 3D optical scanning system. The accuracy and precision of this novel technique were determined using reference blocks with known wear depths. This technique was then used to measure the in vitro wear of a hip resurfacing device for canines that incorporates a highly cross-linked polyethylene liner. The 3D optical scanner had an average accuracy of 2.1 µm and an average precision of 1.4 µm, which corresponded to errors less than 10% when measuring wear depths of 20 µm or greater. The scanner was able to repeatedly generate 3D colorimetric maps of wear depth in highly cross-linked polyethylene liners in 20 min or less. These colorimetric maps identified localized regions with 3-fold greater wear than the average wear depth, and revealed liners with asymmetric wear patterns. For the first time, this study has validated the use of 3D optical scanning to quantify in vitro surface wear in a hip replacement device.
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