Rajadhyaksha Amar D, Brotea Cristian, Cheung Yeukkei, Kuhn Courtney, Ramakrishnan Rama, Zelicof Steven B
Westchester Medical Center, New York Medical College Department of Orthopaedics, Valhalla, New York 10595, USA.
J Arthroplasty. 2009 Feb;24(2):161-7. doi: 10.1016/j.arth.2007.09.015. Epub 2008 Mar 4.
The purpose of this study was to compare the linear penetration rates of a highly cross-linked ultra-high-molecular-weight polyethylene to traditional polyethylene. Twenty-seven highly cross-linked components were matched to 27 traditional polyethylene components with respect to age, sex, body mass index, and activity level. Each group was followed up for a mean of approximately 6 years. Linear penetration was measured using Martell's computerized technique (J Bone Joint Surg Am 1997;79:1635). The mean total penetration was 0.283 mm (SD, 0.253) for the highly cross-linked group. The mean total penetration for the traditional polyethylene was 0.696 mm (SD, 0.402). This difference was highly significant (P < or = .001). Our experience demonstrates a 59% reduction in total penetration of highly cross-linked polyethylene when compared with traditional polyethylene at a minimum of 5 years.
本研究的目的是比较高度交联的超高分子量聚乙烯与传统聚乙烯的线性磨损率。将27个高度交联的部件与27个传统聚乙烯部件在年龄、性别、体重指数和活动水平方面进行匹配。每组平均随访约6年。使用马特尔的计算机技术测量线性磨损（《美国骨与关节外科杂志》1997年；79:1635）。高度交联组的平均总磨损为0.283毫米（标准差，0.253）。传统聚乙烯的平均总磨损为0.696毫米（标准差，0.402）。这种差异具有高度显著性（P≤0.001）。我们的经验表明，与传统聚乙烯相比，高度交联聚乙烯在至少5年时的总磨损减少了59%。
