Recovery of knee range of motion after total knee arthroplasty in the first postoperative weeks: poor recovery can be detected early

Purpose The aim of this study was to analyze in detail how knee flexion and extension progress in the first 8 weeks after primary total knee arthroplasty (TKA). The secondary goal was to compare knee range of motion (ROM) recovery patterns between patients with normal and delayed ROM recovery 8 weeks after TKA.