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최돈옥(Donok Choi),윤용산(Yong-san Yoon) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Currently, two kinds of orthopaedic implant fixation methods are popular: cemented and cementless. However, the longevity of the implant fixation is limited by its weak strength, wear debris and poor biocompatibility of the cement, or stress shielding and difficulty in revision of the cementless. In this study, we are evaluating a new concept of the implant fixation using a bone-friendly buffer between the implant and the bone. The PEEK was selected as the buffer material in this study. A tapered smooth implant is wedged into the buffer so that the taper-lock effect can be obtained persistently. We performed a finite element analysis to evaluate this fixation in mechanical aspect. We compared the buffered implant fixation with the cemented and cementless implant fixations. The buffered fixation had greater cyclic compression for the bone compared to the rough cement fixation and less failure risk factors compared to the polished cement fixation. Moreover, the buffered fixation had widely distributed compression compared to the cementless fixation. The FEA results show that the buffered implant fixation encourage an appropriate mechanical environments.