High-flexion knee prostheses do not significantly improve range of motion
Mehin R. J Bone Joint Surg (Br). 2010;92:1429-1434. doi:10.1302/0301-620X.92B10.23199.
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High-flexion prostheses do not significantly improve knee flexion, according to meta-analysis results.
A new generation of knee prostheses was introduced with the goal of improving postoperative knee flexion, according to the authors.
In their meta-analysis, Ramin Mehin, MD, MHSc, FRCS, Abbotsford Regional Hospital and Cancer Centre, Abbotsford, British Columbia, and colleagues systematically reviewed the literature in Medline and EMBASE from their inception to 2007. They also searched the proceedings of scientific meetings. They included only randomized, clinical trials in this study. They chose the mean difference in the maximum postoperative flexion between the “high-flex” and conventional prostheses as their primary outcome measure. The researchers found five articles that met their inclusion criteria.
The analysis showed that there was no clinically or statistically significant flexion improvement with high-flex prostheses. The weighted mean difference was 2.1° (95% CI, –0.2-+4.3).