Abstract
A retrospective case-control study was conducted to evaluate 1-year total knee arthroplasty
(TKA) outcomes among preoperative stiff knees, range of motion (ROM) 80° or less,
compared with nonstiff preoperative knees, ROM 100° or greater. A total of 134 stiff
knee cases were compared with a matched cohort of 134 non–stiff knee controls. Knee
Society Score and Oxford Knee Score change scores from baseline to 1 year were similar
between the groups. Stiff knees experienced a significantly greater mean improvement
in ROM from baseline to 1 year (30.8° ± 18.8°) as compared with nonstiff knees (1.1°
± 12.8°) (P < .0001). Although ultimate ROM of a TKA can be restricted secondary to preoperative
stiffness, improvements in outcomes and ROM are not affected. We conclude that progression
of stiffness should not in and of itself lead to earlier intervention of TKA in most
cases.
Keywords
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Article info
Publication history
Published online: January 30, 2012
Accepted:
December 10,
2011
Received:
June 1,
2011
Footnotes
The Conflict of Interest statement associated with this article can be found at doi:10.1016/j.arth.2011.12.015.
Identification
Copyright
© 2012 Elsevier Inc. Published by Elsevier Inc. All rights reserved.
