首页> 外文会议>Symposia on Biomaterials for Drug Delivery and Tissue Engineering Nov 27-29, 2000, Boston, Massachusetts, U.S.A. >BIOACTIVITY RESPONSES OF DIFFERENT UHMWPE PARTICLES FROM IN-VIVO AND IN-VITRO TESTS
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BIOACTIVITY RESPONSES OF DIFFERENT UHMWPE PARTICLES FROM IN-VIVO AND IN-VITRO TESTS

机译:体内和体外测试中不同UHMWPE颗粒的生物活性反应

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摘要

This paper describes the results of bioactivity responses to different ultra high molecular weight polyethylene (UHMWPE) particles. Particles were produced by a wear tester using two different textures of steel counters, one with cross-hatched and the other with uni-hatched grooves. These two textured surfaces produced two distinct populations of wear particles. One is larger and more elongated (fibril shapes) than the other. The mean sizes and aspect ratios of the particles are in the ranges of 5 jam to 25 μm and about 1.5 to 3, respectively. These two distinct UHMWPE particles were examined through in-vitro and in-vivo tests. Macrophages RAW 264.7 and the murine air-pouch model of inflammation were employed to characterize the effect of the particle size and shape. Preliminary in-vivo tests results showed that more elongated and larger particles enhanced bio-reactions.
机译:本文介绍了对不同超高分子量聚乙烯(UHMWPE)颗粒的生物活性反应的结果。磨损测试仪使用两种不同质地的钢制柜台产生颗粒,一种带有交叉影线,另一种带有单影线槽。这两个纹理化的表面产生了两个不同的磨损颗粒群。一个比另一个更大,更细长(纤丝形状)。颗粒的平均尺寸和长宽比分别在5 jam至25μm和约1.5至3的范围内。通过体外和体内测试检查了这两种不同的UHMWPE颗粒。使用巨噬细胞RAW 264.7和小鼠气袋炎症模型来表征颗粒大小和形状的影响。初步的体内试验结果表明,更长的颗粒和更大的颗粒增强了生物反应。

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