In vivo measurement of volumetric wear of a total knee replacement

被引：31

作者：

Gill, H. S. ^{[1
]}

Waite, J. C. ^{[1
]}

Short, A. ^{[1
]}

Kellett, C. F. ^{[1
]}

Price, A. J. ^{[1
]}

Murray, D. W. ^{[1
]}

机构：

[1] Univ Oxford, Nuffield Orthopaed Ctr, Nuffield Dept Orthopaed Surg, OOEC,Botnar Res Ctr, Oxford OX3 7LD, England

来源：

KNEE | 2006年 / 13卷 / 04期

关键词：

D O I：

10.1016/j.knee.2006.04.001

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：

A new Roentgen Stereophotogrammetric Analysis (RSA) system is reported; it can measure penetration of the metallic femoral component of a Total Knee Replacement (TKR) prosthesis into the polyethylene bearing on the tibial component. This system was used to analyse a study group of six Anatomic Graduated Components (AGC) knee prostheses more than 6 years post-implantation, and to compare with a control group of six newly implanted AGC prostheses. The volumetric loss of polyethylene was estimated by imaging each prosthesis at a series of different knee flexion angles. The mean difference between the RSA measured polyethylene bearing thickness and the manufacturer's quoted values for the control group was -0.03 mm (SD 0.17). The estimated linear penetration at 6.4 years in this prosthesis was determined to be 0.1 mm/year. Volumetric wear was estimated to be 600-700 mm(3)/year at 6.4 years, equating to similar to 100 mm(3)/year. This does not appear to be clinically significant amount of wear as this prosthesis has excellent survival at 10 years. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：312 / 317

页数：6

共 18 条

[1] Technical feasibility and precision of radiostereometric analysis as an outcome measure in canine cemented total hip replacement [J].