【24h】

A Novel Method for Measuring Polyethylene Hip Liner Wear Using a Coordinate Measuring Machine and a Dual Stylus Probe

机译:使用坐标测量机和双测针探针测量聚乙烯髋关节衬里磨损的新方法

获取原文
获取原文并翻译 | 示例

摘要

Ex vivo high-resolution measurement of highly crosslinked (HXL) polyethylene hip liner wear is necessary to characterize the in vivo performance of these polymers that exhibit increased wear resistance. Current studies focus on using a coordinate measuring machine (CMM) to acquire data representing the bearing surface( s) of HXL hip liners and use this data to determine linear and volumetric wear. However, these current techniques are subject to error in both data acquisition and data analysis. The purpose of this study was to identify these sources of error and present a novel method for HXL wear measurement that minimizes these contributions to error: our novel methods use a CMM to measure both the articular and backside surfaces of HXL hip liners for subsequent data analysis in Geomagic Control and MATLAB. Our method involves a vertical orientation of the hip liner to enable one CMM scan of both sides of the hip liner. This method minimizes identified sources of error and proves to be an effective approach for data acquisition of HXL hip liner wear. We also find that our data analysis technique of calculating changes in wall thicknesses is effective in accounting for errors associated with data analysis. Validation of this technique occurred via measurement of two never-implanted HXL hip liners of different sizes (28 mm and 32 mm). In comparing the 32 mm hip liner to its corresponding computer-aided design (CAD) model, we found that our data acquisition technique led to a 0.0019 mm discrepancy between the scanned liner and its CAD model in measured thickness at the pole. We calculated 0.0588 mm and 0.0800 of linear wear for the 28 mm and 32 mm hip liners, respectively, based on our data analysis algorithm. We hypothesize that these reported linear wear values of the never-implanted hip liners are due to machining tolerances of the hip liners themselves.
机译:高交联度(HXL)聚乙烯臀部衬垫磨损的离体高分辨率测量对于表征这些表现出增强的耐磨性的聚合物的体内性能是必要的。当前的研究集中在使用坐标测量机(CMM)获取代表HXL臀部衬垫的支撑表面的数据,并使用该数据确定线性和体积磨损。但是,这些当前技术在数据获取和数据分析中都容易出错。这项研究的目的是找出这些错误的来源,并提出一种新的HXL磨损测量方法,以最大程度地减少对错误的影响:我们的新方法使用CMM来测量HXL髋内衬的关节面和背面,以进行后续数据分析在Geomagic Control和MATLAB中。我们的方法涉及髋部衬板的垂直方向,以实现髋部衬板两侧的一次CMM扫描。此方法可最大程度地减少已识别的错误源,并被证明是HXL髋内衬磨损数据采集的有效方法。我们还发现,我们计算壁厚变化的数据分析技术可有效解决与数据分析相关的错误。通过测量两个未植入的不同尺寸(28毫米和32毫米)的HXL髋内衬,对该技术进行了验证。通过将32毫米髋关节衬垫与其相应的计算机辅助设计(CAD)模型进行比较,我们发现我们的数据采集技术导致扫描的衬垫及其CAD模型在杆上测得的厚度之间存在0.0019毫米的差异。根据我们的数据分析算法,我们分别计算了28毫米和32毫米臀部衬垫的线性磨损为0.0588毫米和0.0800毫米。我们假设这些报告的从未植入的髋关节衬垫的线性磨损值是由于髋关节衬垫本身的加工公差引起的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号