Metal-backed versus all-polyethylene tibias in megaprostheses of the distal femur.

Crosby SN, Polkowski GG, Schwartz HS, Shinar AA, Holt GE
J Arthroplasty. 2011 26 (3): 451-7

PMID: 20334995 · DOI:10.1016/j.arth.2010.01.007

In megaprostheses, the tibial component is rarely a source of failure. The evolution of these implants has followed standard arthroplasty trends moving from majority use of all-polyethylene tibias (APT) to high volume use of metal-backed tibial (MBT) components. We report the results of 72 endoprostheses using either MBT (n = 42) or APT (n = 30) implanted between 1994 and 2006. Failures of the implant related to the tibial component were isolated, and 5-year survival of the tibial implant of the MBT cohort was 94%, and for the APT cohort, 87% (P = .39). The difference in tibial component failures between the 2 groups was not statistically significant (Pearson χ(2) = 0.1535, P = .6952). Revision rates for the entire implant and infection rates were not significantly different between the 2 groups.

Copyright © 2011 Elsevier Inc. All rights reserved.

MeSH Terms (24)

Adolescent Adult Aged Aged, 80 and over Arthroplasty, Replacement, Knee Bone Marrow Neoplasms Child Female Femur Humans Kaplan-Meier Estimate Knee Prosthesis Male Metals Middle Aged Osteosarcoma Polyethylene Prosthesis Design Prosthesis Failure Reoperation Retrospective Studies Tibia Treatment Outcome Young Adult

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