2026-11-092026-11-09https://scholars.csmu.edu.tw/handle/123456789/38832The wear of polyethylene acetabular components is an important issue in total hip arthroplasty. Based on our previous research, this project aims to continue the discussion on the wear patterns and wear volume formulae of acetabular liners that are commonly used in clinics, and to clarify the mechanism of multiple wear vectors. In current literatures, only hemispherical and cylindrically elongated liners are discussed concerning their wear volume formulae, which is because the analysis of the wear phenomena of a liner is very complicated. In addition, the formulae provided in the literature not only fail to disclose the wear patterns, but also yield some unreasonable results. For these two types of liners, this project utilizes the key analysis techniques to suggest the most reasonable and accurate results. The research articles have been submitted to famous international journals for publication. Thus, in this three-year project, the first two years will focus on the liners with a filleted elongation, a stepped elongation, or a 10° hooted elongation. Furthermore, past report identified more than one wear vector in thirty-one cups (30%) in 104 retrieved acetabular cups. This may be associated with the varying wear patterns around the rim of liner as wear depth increased or elongation thickness variation. Thus, in the third year of this project, finite element method will be used to analyze the phenomenon of stress distribution transfer as the wear pattern changes, which can be used to clarify the mechanism of multiple wear vectors.髖臼杯聚乙烯內襯的磨耗乃是全人工髖關節置換術的重要課題。基於申請人現有的 研究成果，本計畫的目的乃要繼續探討臨床上普遍採用的髖臼杯內襯之磨耗型態與磨耗 體積方程，並且解析多向磨耗的發生機制。 目前文獻上僅有關於半球型以及具有圓柱形延伸部等兩種內襯之磨耗體積計算公 式，此乃因為髖臼杯體積缺損量的分析非常複雜。但這些公式不僅未提出內襯杯口邊緣 的磨耗型態，且都有不合理的情形發生。對於這兩種內襯，申請人已掌握關鍵分析技術， 提出最合理且最正確的分析結果，並且投稿至國際知名期刊中。因此，本次所提的三年 計畫中，前兩年要進一步將臨床上杯口具有導角以及延伸部厚度具階梯式變化和以10 度斜邊漸進變化之內襯做一完整之分析。 另外，有研究提到，從病患身上取下的104個髖臼杯內襯，其中有31個(30%)出現多 向磨耗現象。此或許與我們目前所發現，當磨耗深度增加或延伸部厚度改變時，在內襯 開口邊緣觀察到磨耗型態的改變有關。因此，本計畫的第三年將先針對基本款式的內 襯，以有限元素法分析當磨耗方向或延伸部厚度改變時，隨著磨耗型態的改變而造成的 應力轉移現象，藉以釐清多向磨耗的發生機制。Project