TY - JOUR
T1 - Activity level and wear in total knee arthroplasty
T2 - A study of autopsy retrieved specimens
AU - Lavernia, Carlos J.
AU - Sierra, Rafael J.
AU - Hungerford, David S.
AU - Krackow, Kenneth
N1 - Funding Information:
This work was supported by a generous grant from the Arthritis Surgery Research Foundation.
PY - 2001
Y1 - 2001
N2 - We assessed the correlation between activity level, length of implantation (LOI), and wear in total knee arthroplasty. Twenty-eight implants were retrieved at autopsy from 8 men and 15 women. Linear, volumetric, and visual wear and the presence or absence of creep were quantitated. Functional level was classified using the Knee Society, the standard Charnley classification, and the UCLA activity level scale. The average age at surgery was 68 years ± 14.0 SD and average LOI was 74 months ± 38 SD. The average linear and volumetric wear rates were 0.127 mm/y ± 0.104 SD and 31.80 mm3/y ± 42.8 SD. LOI (B coefficient = -0.656 ± 0.0 SE; P<.001) correlated with linear, volumetric, and visual wear rates. Charnley C patients showed decreased volumetric wear in the lateral compartment (P=.01). Decreased activity level (UCLA) correlated with areas of less extent and severity of creep (P=.O01 and P<.O01).
AB - We assessed the correlation between activity level, length of implantation (LOI), and wear in total knee arthroplasty. Twenty-eight implants were retrieved at autopsy from 8 men and 15 women. Linear, volumetric, and visual wear and the presence or absence of creep were quantitated. Functional level was classified using the Knee Society, the standard Charnley classification, and the UCLA activity level scale. The average age at surgery was 68 years ± 14.0 SD and average LOI was 74 months ± 38 SD. The average linear and volumetric wear rates were 0.127 mm/y ± 0.104 SD and 31.80 mm3/y ± 42.8 SD. LOI (B coefficient = -0.656 ± 0.0 SE; P<.001) correlated with linear, volumetric, and visual wear rates. Charnley C patients showed decreased volumetric wear in the lateral compartment (P=.01). Decreased activity level (UCLA) correlated with areas of less extent and severity of creep (P=.O01 and P<.O01).
KW - Polyethylene
KW - Retrieval
KW - Total knee arthroplasty
KW - Wear
UR - http://www.scopus.com/inward/record.url?scp=0034979120&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034979120&partnerID=8YFLogxK
U2 - 10.1054/arth.2001.23509
DO - 10.1054/arth.2001.23509
M3 - Article
C2 - 11402406
AN - SCOPUS:0034979120
SN - 0883-5403
VL - 16
SP - 446
EP - 453
JO - Journal of Arthroplasty
JF - Journal of Arthroplasty
IS - 4
ER -