Implant design influences XXXX outcome after total knee arthroplasty: a prospective double-blind randomised controlled trial.

@entity1 @entity348 @entity158
@entity348 ( @entity348 ) is an established and successful procedure. However, the design of prostheses continues to be modified in an attempt to optimise the functional outcome of the @entity1 . The aim of this study was to determine if @entity1 outcome after @entity348 was influenced by the design of the prosthesis used. A total of 212 @entity1 (mean age 69; 43 to 92; 131 female (62%), 81 male (32%)) were enrolled in a single centre double-blind trial and randomised to receive either a Kinemax (group 1) or a Triathlon (group 2) @entity348 . @entity1 were assessed pre-operatively, at six weeks, six months, one year and three years after surgery. The outcome assessments used were the Oxford Knee Score; range of movement; @entity158 numerical rating scales; lower limb power output; timed functional assessment battery and a satisfaction survey. Data were assessed incorporating change over all assessment time points, using repeated measures analysis of variance longitudinal mixed models. Implant group 2 showed a significantly greater range of movement (p = 0.009), greater lower limb power output (p = 0.026) and reduced report of 'worst daily @entity158 ' (p = 0.003) over the three years of follow-up. Differences in Oxford Knee Score (p = 0.09), report of 'average daily @entity158 ' (p = 0.57) and timed functional performance tasks (p = 0.23) did not reach statistical significance. Satisfaction with outcome was significantly better in group 2 (p = 0.001). These results suggest that @entity1 outcome after @entity348 can be influenced by the prosthesis used.
