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The Knee, ISSN: 0968-0160, Vol: 9, Issue: 4, Page: 331-334
Knee
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The incidence of revision of the metal component of total knee arthroplasties in different tibial-insert designs
Huang, Chun-Hsiung; Liau, Jiann-Jong; Lung, Chen-Yu; Lan, Chih-Tang; Cheng, Cheng-KungKnee
Seventy-one revisions of knee arthroplasty due to wear of modular tibial polyethylene inserts undertaken from May 1990 to May 1999 were reviewed. In 38 cases (53.5%), severe damage was noted that necessitated replacement of the metal components. This proportion was less than in a previous study (88.7%). All the cases were further divided into two groups based on the design of the tibial component, one group having mobile bearings and the other fixed. In only 17.7% of the mobile group was there a need to replace metal parts at revision, whereas 83.8% of the fixed group required such replacement, which is much more comparable to the previous study. Therefore, the incidence of revision of the metallic component of a total knee arthroplasty depends greatly on the design of the tibial components.
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