No Clinical Benefit of High-Flex Total Knee Arthroplasty. A Meta-Analysis of Randomized Controlled Trials

10 randomized controlled trials were included in this meta-analysis comparing range of motion between high-flexion knee prostheses and standard prostheses in posterior-stabilized total knee arthroplasty. Pooled results demonstrated no differences in postoperative range of flexion, clinical scores, quality of life scores, or complication rates between the two device types. In a sub-group analysis of NexGen devices, a statistically significant increase of 1.69 degrees for range of flexion was observed in favour of the high-flex device.