In vivo roughening of retrieved total knee arthroplasty femoral components

Raphael Malikian; Kunalan Maruthainar; John Stammers; Steve R. Cannon; Richard Carrington; John A. Skinner; Nimalan Maruthainar; George Dowd; Tim W. R. Briggs; Gordon W. Blunn

doi:10.1016/j.knee.2012.09.008

In vivo roughening of retrieved total knee arthroplasty femoral components

Raphael Malikian, Kunalan Maruthainar, John Stammers, Steve R. Cannon, Richard Carrington, John A. Skinner, Nimalan Maruthainar, George Dowd, Tim W. R. Briggs, Gordon W. Blunn

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

Abstract

Background - Joint registry data highlights the higher rates of cumulative revision for younger patients undergoing TKR. One of the reasons associated with this higher revision rate may be due to the wear of the UHMWPE leading to loosening. Alternate bearing surfaces have been developed to address this problem; however, roughening of the metal bearing surface has not been demonstrated in vivo.

Method - We recorded roughness measurements of retrieved femoral components.

Results - Average lateral condyle roughness was 0.032 μm, compared to control values of 0.020 μm, p=0.002; average medial condyle roughness was 0.028 μm, compared to a control value of 0.019, p<0.001.

Conclusion - There was a small but statistically significant roughening of femoral components in vivo compared to controls. This may have important implications for aseptic loosening of knee arthroplasty components and the decision to use scratch resistant components.

Original language	English
Pages (from-to)	278-282
Number of pages	5
Journal	Knee
Volume	21
Issue number	1
Early online date	8 Nov 2012
DOIs	https://doi.org/10.1016/j.knee.2012.09.008
Publication status	Published - Jan 2014

Keywords

Aged
Aged, 80 and over
Arthroplasty, Replacement, Knee
Case-Control Studies
Chromium
Cobalt
Device Removal
Female
Humans
Knee Prosthesis
Male
Microscopy, Electron, Scanning
Middle Aged
Polyethylene
Prosthesis Failure
Reoperation
Surface Properties

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10.1016/j.knee.2012.09.008

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@article{a8122025e7814cd29d1780b70e538e48,

title = "In vivo roughening of retrieved total knee arthroplasty femoral components",

abstract = "Background - Joint registry data highlights the higher rates of cumulative revision for younger patients undergoing TKR. One of the reasons associated with this higher revision rate may be due to the wear of the UHMWPE leading to loosening. Alternate bearing surfaces have been developed to address this problem; however, roughening of the metal bearing surface has not been demonstrated in vivo.Method - We recorded roughness measurements of retrieved femoral components.Results - Average lateral condyle roughness was 0.032 μm, compared to control values of 0.020 μm, p=0.002; average medial condyle roughness was 0.028 μm, compared to a control value of 0.019, p<0.001.Conclusion - There was a small but statistically significant roughening of femoral components in vivo compared to controls. This may have important implications for aseptic loosening of knee arthroplasty components and the decision to use scratch resistant components.",

keywords = "Aged, Aged, 80 and over, Arthroplasty, Replacement, Knee, Case-Control Studies, Chromium, Cobalt, Device Removal, Female, Humans, Knee Prosthesis, Male, Microscopy, Electron, Scanning, Middle Aged, Polyethylene, Prosthesis Failure, Reoperation, Surface Properties",

author = "Raphael Malikian and Kunalan Maruthainar and John Stammers and Cannon, {Steve R.} and Richard Carrington and Skinner, {John A.} and Nimalan Maruthainar and George Dowd and Briggs, {Tim W. R.} and Blunn, {Gordon W.}",

note = "Post-print is unavailable.",

year = "2014",

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doi = "10.1016/j.knee.2012.09.008",

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volume = "21",

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journal = "Knee",

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T1 - In vivo roughening of retrieved total knee arthroplasty femoral components

AU - Malikian, Raphael

AU - Maruthainar, Kunalan

AU - Stammers, John

AU - Cannon, Steve R.

AU - Carrington, Richard

AU - Skinner, John A.

AU - Maruthainar, Nimalan

AU - Dowd, George

AU - Briggs, Tim W. R.

AU - Blunn, Gordon W.

N1 - Post-print is unavailable.

PY - 2014/1

Y1 - 2014/1

N2 - Background - Joint registry data highlights the higher rates of cumulative revision for younger patients undergoing TKR. One of the reasons associated with this higher revision rate may be due to the wear of the UHMWPE leading to loosening. Alternate bearing surfaces have been developed to address this problem; however, roughening of the metal bearing surface has not been demonstrated in vivo.Method - We recorded roughness measurements of retrieved femoral components.Results - Average lateral condyle roughness was 0.032 μm, compared to control values of 0.020 μm, p=0.002; average medial condyle roughness was 0.028 μm, compared to a control value of 0.019, p<0.001.Conclusion - There was a small but statistically significant roughening of femoral components in vivo compared to controls. This may have important implications for aseptic loosening of knee arthroplasty components and the decision to use scratch resistant components.

AB - Background - Joint registry data highlights the higher rates of cumulative revision for younger patients undergoing TKR. One of the reasons associated with this higher revision rate may be due to the wear of the UHMWPE leading to loosening. Alternate bearing surfaces have been developed to address this problem; however, roughening of the metal bearing surface has not been demonstrated in vivo.Method - We recorded roughness measurements of retrieved femoral components.Results - Average lateral condyle roughness was 0.032 μm, compared to control values of 0.020 μm, p=0.002; average medial condyle roughness was 0.028 μm, compared to a control value of 0.019, p<0.001.Conclusion - There was a small but statistically significant roughening of femoral components in vivo compared to controls. This may have important implications for aseptic loosening of knee arthroplasty components and the decision to use scratch resistant components.

KW - Aged

KW - Aged, 80 and over

KW - Arthroplasty, Replacement, Knee

KW - Case-Control Studies

KW - Chromium

KW - Cobalt

KW - Device Removal

KW - Female

KW - Humans

KW - Knee Prosthesis

KW - Male

KW - Microscopy, Electron, Scanning

KW - Middle Aged

KW - Polyethylene

KW - Prosthesis Failure

KW - Reoperation

KW - Surface Properties

U2 - 10.1016/j.knee.2012.09.008

DO - 10.1016/j.knee.2012.09.008

M3 - Article

C2 - 23142273

SN - 0968-0160

VL - 21

SP - 278

EP - 282

JO - Knee

JF - Knee

IS - 1

ER -

In vivo roughening of retrieved total knee arthroplasty femoral components

Abstract

Keywords

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