Three-dimensional laser micrometry characterization of surface wear in total hip arthroplasty
Three-dimensional laser micrometry characterization of surface wear in total hip arthroplasty
复制标题
DOI：
10.1002/jbm.b.30748
复制
发表时间：
2007-08-01
影响因子：
3.4
通讯作者：
Lannutti, John
中科院分区：
文献类型：
--
作者：
Kohm, Andrew;Gaumer, Jeremy;Lannutti, John
即使经过几十年的临床使用，我们量化全髋关节置换植入物表面磨损的能力在很大程度上限于单值测量。患者因素对磨损的影响仍然是个谜。三维激光测微仪（3DLM）的发展的试点研究介绍了一种简单，准确的方法“映射”和量化材料去除。使用精度为0.5 μ m的激光测微计构建三维激光测微计。3D表面图是从由近似140，000个单独点组成的点云三角测量的。通过与参考球体的比较，确定整个表面上的径向磨损。3DLM能够映射和量化精细尺度的表面特征。即使对于相对柔软的超高分子量聚乙烯上的氧化锆，该技术也在宏观水平上绘制了局部磨损的贡献。这些激光器的0.5 μ m（或更高）精度使我们能够以高度的信心对表面进行成像。该分析非常适合自动化，我们预计这一进展将证明在确定从给定临床环境中出现的每个股骨头和髋臼杯组合具有独特的磨损模式方面具有价值，如在该试验数据集中观察到的。(C)2007 Wiley Periodicals，Inc.
Even after decades of clinical use, our ability to quantify wear across total hip replacement implant surfaces is largely limited to single value measurements. The influence, of patient factors on wear remains enigmatic. This pilot study for the development of threedimensional laser micrometry (3DLM) introduces an easy, accurate means of 'mapping' and quantifying material removal. A three-dimensional laser micrometer was constructed using a laser micrometer having an accuracy of 0.5 mu m. A 3D surface map is triangulated from a point cloud consisting of similar to 140,000 individual points. Comparison to a reference sphere determines radial wear over the entire surface. 3DLM was able to map and quantify fine scale surface features. Even for zirconia on relatively soft ultra-high molecular weight polyethylene, this technique maps the contributions of localized wear at the macroscopic level. The 0.5 mu m (or greater) accuracy of these lasers allows us to image surfaces with a high degree of confidence. This analysis lends itself well to automation, and we anticipate that this advance will prove valuable in establishing that each head and cup combination emerging from a given clinical environment has unique wear patterns as observed in this trial data set. (C) 2007 Wiley Periodicals, Inc.