Higher rate of revision in PFC sigma primary total knee arthroplasty with mismatch of femoro-tibial component sizes

Simon W. Young; Henry D. Clarke; Stephen E. Graves; Yen Liang Liu; Richard N. de Steiger

doi:10.1016/j.arth.2014.11.035

Higher rate of revision in PFC sigma primary total knee arthroplasty with mismatch of femoro-tibial component sizes

Simon W. Young, Henry D. Clarke, Stephen E. Graves, Yen Liang Liu, Richard N. de Steiger

Orthopedics

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Total knee arthroplasty (TKA) systems permit a degree of femoro-tibial component size mismatch. The effect of mismatched components on revision rates has not been evaluated in a large study. We reviewed 21,906 fixed-bearing PFC Sigma primary TKAs using the Australian Orthopaedic Association National Joint Replacement Registry, dividing patients into three groups: no femoro-tibial size mismatch, tibial component size. >. femoral component size, and femoral component. >. tibial component. Revision rates were higher when the femoral size was greater than the tibia, compared to both equal size (HR. =. 1.20 (1.00, 1.45), P=. 0.047) and to tibial size greater than femoral (HR. =. 1.60 (1.08, 2.37), P=. 0.019). Potential mechanisms to explain these findings include edge loading of polyethylene and increased tibial component stresses.

Original language	English (US)
Pages (from-to)	813-817
Number of pages	5
Journal	Journal of Arthroplasty
Volume	30
Issue number	5
DOIs	https://doi.org/10.1016/j.arth.2014.11.035
State	Published - May 1 2015

Keywords

Component size
Registry
Revision rates
Size mismatch
Total knee arthroplasty

ASJC Scopus subject areas

Orthopedics and Sports Medicine

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10.1016/j.arth.2014.11.035

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title = "Higher rate of revision in PFC sigma primary total knee arthroplasty with mismatch of femoro-tibial component sizes",

abstract = "Total knee arthroplasty (TKA) systems permit a degree of femoro-tibial component size mismatch. The effect of mismatched components on revision rates has not been evaluated in a large study. We reviewed 21,906 fixed-bearing PFC Sigma primary TKAs using the Australian Orthopaedic Association National Joint Replacement Registry, dividing patients into three groups: no femoro-tibial size mismatch, tibial component size. >. femoral component size, and femoral component. >. tibial component. Revision rates were higher when the femoral size was greater than the tibia, compared to both equal size (HR. =. 1.20 (1.00, 1.45), P=. 0.047) and to tibial size greater than femoral (HR. =. 1.60 (1.08, 2.37), P=. 0.019). Potential mechanisms to explain these findings include edge loading of polyethylene and increased tibial component stresses.",

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author = "Young, {Simon W.} and Clarke, {Henry D.} and Graves, {Stephen E.} and Liu, {Yen Liang} and {de Steiger}, {Richard N.}",

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AU - Young, Simon W.

AU - Clarke, Henry D.

AU - Graves, Stephen E.

AU - Liu, Yen Liang

AU - de Steiger, Richard N.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Total knee arthroplasty (TKA) systems permit a degree of femoro-tibial component size mismatch. The effect of mismatched components on revision rates has not been evaluated in a large study. We reviewed 21,906 fixed-bearing PFC Sigma primary TKAs using the Australian Orthopaedic Association National Joint Replacement Registry, dividing patients into three groups: no femoro-tibial size mismatch, tibial component size. >. femoral component size, and femoral component. >. tibial component. Revision rates were higher when the femoral size was greater than the tibia, compared to both equal size (HR. =. 1.20 (1.00, 1.45), P=. 0.047) and to tibial size greater than femoral (HR. =. 1.60 (1.08, 2.37), P=. 0.019). Potential mechanisms to explain these findings include edge loading of polyethylene and increased tibial component stresses.

AB - Total knee arthroplasty (TKA) systems permit a degree of femoro-tibial component size mismatch. The effect of mismatched components on revision rates has not been evaluated in a large study. We reviewed 21,906 fixed-bearing PFC Sigma primary TKAs using the Australian Orthopaedic Association National Joint Replacement Registry, dividing patients into three groups: no femoro-tibial size mismatch, tibial component size. >. femoral component size, and femoral component. >. tibial component. Revision rates were higher when the femoral size was greater than the tibia, compared to both equal size (HR. =. 1.20 (1.00, 1.45), P=. 0.047) and to tibial size greater than femoral (HR. =. 1.60 (1.08, 2.37), P=. 0.019). Potential mechanisms to explain these findings include edge loading of polyethylene and increased tibial component stresses.

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KW - Registry

KW - Revision rates

KW - Size mismatch

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Higher rate of revision in PFC sigma primary total knee arthroplasty with mismatch of femoro-tibial component sizes

Abstract

Keywords

ASJC Scopus subject areas

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