Steady-state penetration rates of electron beam-irradiated, highly cross-linked polyethylene at an average 45-month follow-up

被引:40
作者
Bragdon, Charles R.
Barrett, Susan
Martell, John M.
Greene, Meridith E.
Malchau, Henrik
Harris, William H.
机构
[1] Massachusetts Gen Hosp, Dept Orthopaed Surg, Orthopaed Biomech & Biomat Lab, Boston, MA 02114 USA
[2] Massachusetts Gen Hosp, Dept Orthopaed Surg, Adult Reconstruct Unit, Boston, MA 02114 USA
[3] Harvard Univ, Sch Med, Boston, MA USA
[4] Univ Chicago, Sect Orthopaed, Chicago, IL 60637 USA
[5] Harvard Univ, Sch Med, Dept Orthopaed Surg, Boston, MA USA
关键词
total hip replacement; cross-linked polyethylene; wear; hip; arthroplasty;
D O I
10.1016/j.arth.2006.01.006
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
Steady-state penetration rates were determined on 53 total hip arthroplasties with a minimum 3-year follow-up using electron beam highly cross-linked melted polyethylene by determining the femoral head penetration occurring after the first year in vivo. These data were compared with that of a matched control group. The average steady-state penetration rate of the control group was 144 +/- 191 mu m/y, significantly higher than that of the highly crosslinked polyethylene group, 25 +/- 99 mu m/y (P = .0001). Linear regression analysis indicated that the magnitude of femoral head penetration did not increase with time in the cross-linked groups. Also, no significant difference existed between the steady-state wear rates of the highly cross-linked groups with two head sizes (28 vs 32 mm, P = .39).
引用
收藏
页码:935 / 943
页数:9
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