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- 저자 : 오승재 ( Sung Je Oh ) (검색결과 1 건)
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Metal-Backed 비구컵 내의 Polyethylene 마모의 측정 -새 이차원적 방법-
문경호 ( Kyoung Ho Moon ),오승재 ( Sung Je Oh ),이정윤 ( Jung Youn Lee ) 대한고관절학회 1998 Hip and Pelvis Vol.10 No.2
We measured the wear of polyethylene liners in a group of 34 hips(27 patients) in which a metal-backed acetabular cup had been implanted. Each patients was evaluated radiographically and clinically at a minimum of four different postoperative intervals. The initial evaluation was performed just postoperatively, and the last evaluation was performed at a mean of 5.9 years(range, three to eight years) postoperatively. Two-dimensional wear that is, penetration by the femoral head into the ultra-high molecular weight polyethylene liner was determined from anteroposterior radiographs of the pelvis with a computer analysis system that calculated the change in the position of the center of the head relative to the center of the cup. The results were as follows: There was a large difference (mean, 0.46 millimeters) between the center of the head and that of the cup as measured on the initial postoperative radiographs. The difference underscores the need for researchers to consider the initial displacement of the head when measuring and reporting polyethylene wear. The wear rate was mean 0.17 millimeters per year. The wear rate of male group was higher than that of female group. There were no statistically significant difference in each groups regarding age, body weight, cup inclination, head size and the production company. This new computer assisted 2-dimensional method could be a good method for clinical evaluation of the polyethylene wear in metal-backed acetabular cups.
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