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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Clinical Device-Related Article Repeatable procedure for evaluating taper damage on femoral stems with modular necks
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Clinical Device-Related Article Repeatable procedure for evaluating taper damage on femoral stems with modular necks

机译：临床器械相关文章可重复程序，用于评估具有模块化颈部的股骨柄的锥度损伤

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摘要

Understanding the performance of dual-taper modular femoral stems necessitates detailed quantitative assessment. This study reports a repeatable procedure to identify and measure damage on modular taper surfaces and determines whether damage area is a useful parameter for discerning modular femoral stem performance during in vitro corrosion and endurance tests. Twenty-four dual-taper modular necks representing a range of functional conditions were evaluated, including 15 necks previously subjected to in vitro testing and 9 necks explanted during revision hip arthroplasty. Objective identification of six surface features, including four unique damage modes, was accomplished using defined criteria combined with a standardized photogrammetric method for accurate and repeatable measurement of damage area and location. Damage area was a useful parameter for discerning the performance of modular femoral stems subjected to different in vitro tests. The sum of burnished smooth and textured damage areas was linearly correlated with the magnitude of material removed (weight loss) during in vitro testing, predictingapprox 1.0 mg additional weight loss for every 10% increase in those combined damage areas. Modular necks tested with higher load magnitudes and those coupled with larger, stiffer femoral stems were readily distinguished and showed significantly larger areas of burnished smooth and textured damage.
机译：了解双锥模块化股骨柄的性能需要详细的定量评估。这项研究报告了一种可重复的程序，用于识别和测量模块化锥形表面上的损伤，并确定损伤面积是否是在体外腐蚀和耐力测试期间辨别模块化股骨柄性能的有用参数。评估了代表一系列功能状况的二十四个双锥度模块化颈部，其中包括15个先前接受过体外测试的颈部和9个在翻修髋关节置换术中移出的颈部。使用定义的标准结合标准化的摄影测量方法，可以对六个表面特征（包括四个独特的损坏模式）进行客观识别，以准确，可重复地测量损坏区域和位置。损伤面积是辨别经受不同体外试验的股骨干性能的有用参数。在体外测试过程中，打磨过的光滑和有纹理的损坏区域的总和与去除的材料的大小（重量减轻）线性相关，并预测在这些组合损坏区域中每增加10％，重量减轻约1.0毫克。在较高的负载强度下测试的模块化颈部以及与更大，更硬的股骨柄相结合的模块化颈部很容易区分，并显示出较大的抛光光滑区域和纹理损伤区域。

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