人體於長期的荷重及相對運動下，對髖關節的磨損會隨著年齡增加而日益嚴重，而當關節軟骨的磨損程度嚴重到會導致髖部疼痛，使得髖關節無法正常運作，此時就需要考慮進行人工髖關節的置換。
在人工髖關節組件應用上，對於需承受高應力之股骨位置，通常是使用有較高強度的金屬材料，而需要能吸收衝擊、減少相對位移的軟骨組織，則是以高分子予以取代。本研究主要目的是比Ti-Mo(І)、Ti-Mo(Ⅱ)及Ti-6Al-4V的磨耗性質作定性的研究與探討。在此將以金屬對金屬和金屬對高分子兩種磨秏機制為基礎，分別做濕式磨潤性質測試和定性的分析，進而探討鈦合金與不同對磨材之間的磨秏現象。
　　整個濕式磨耗測試的結果顯示，在金屬對金屬的實驗中，仍以Ti-6Al-4V的磨耗性質較佳，反之，在金屬對高分子的實驗中，Ti-Mo(І)與Ti-Mo(Ⅱ)兩合金的磨耗性質則比Ti-6Al-4V來的優異。因此在不同的磨耗機制中，其適合作為人工髖關節元件之材料也不盡相同。

　　The body is under the long-period loads and the relative actions, and the abrasion for hip joints will be more and more gross with increasing age. When the abrasion degree for joint cartilage is very serious to induce hip joints hurt and the hip joints can’t work normally, this is time to consider the replacement for artificial hip joints.
　　In the application of artificial hip joints, it is usually used for the higher strong metal material in the femoral position which needs to bear high stress, and it is replaced by polyelectrolyte in the cartilage position which needs to absorb impact and reduce relative displacement. The primary object for the study is the investigation of wear property between Ti-Mo(І), Ti-Mo(Ⅱ) and Ti-6Al-4V. In the base of metal to metal and metal to polyelectrolyte, we will investigate the wear phenomenon between the titanium alloys and different material in the tests of moist wear property.
　　The results of the whole moist wear tests report that the wear property is better for Ti-6Al-4V, in the other end, the wear property for Ti-Mo(І) and Ti-Mo(Ⅱ) is more excellent than that of Ti-6Al-4V. Therefore, the fitting material for hip joints is very different in the different wear mechanisms.

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