PROM, SATISFACTION SCORES
Clinical success in total knee arthroplasty is increasingly defined not only by implant survivorship, but by patient-reported outcomes, functional recovery, and overall satisfaction. It is within this context that kinematic alignment has gained attention, prompting extensive evaluation of its clinical performance compared to conventional mechanical alignment.
Multiple comparative studies and meta-analyses have demonstrated that kinematically aligned TKA achieves at least equivalent clinical outcomes, with several reporting superior early functional scores and patient satisfaction. Improvements are commonly noted in pain relief, knee function scores, and measures such as the Forgotten Joint Score, suggesting that patients are more likely to perceive the knee as natural rather than artificial.
Native alignment
One consistent observation across the literature is the reduction in extensive soft-tissue releases when kinematic alignment is employed. By restoring the knee to its native alignment, ligament balance is often achieved inherently, potentially reducing postoperative stiffness and facilitating faster functional recovery. This may explain why some studies report quicker return to daily activities and improved early rehabilitation outcomes.
Concerns have been raised regarding implant longevity and alignment “outliers.” However, medium-term follow-up data have not demonstrated increased failure rates when kinematic alignment is applied within defined safety limits. Importantly, survivorship appears comparable to mechanically aligned TKA when component positioning avoids extreme coronal or sagittal deviations.
Judicious patient selection
Patient selection and surgical execution remain critical. Kinematic alignment is not a universal solution, and outcomes depend on careful preoperative assessment, accurate bone resection, and appropriate intraoperative decision-making. When applied judiciously, it offers a compelling alternative for patients whose native anatomy deviates from neutral mechanical alignment.
From a clinical perspective, the growing body of evidence suggests that kinematic alignment addresses a long-standing limitation of traditional TKA—namely, the mismatch between radiographic success and patient experience. As outcome measures increasingly prioritise quality of life, kinematic alignment offers a patient-centred framework that aligns surgical goals with functional reality.
Suggested Reading
Liu B, Feng C, Tu C. Kinematic alignment versus mechanical alignment in primary total knee arthroplasty: A meta-analysis. J Orthop Surg Res. 2022;17:188.
Courtney PM, Lee GC. Early outcomes of kinematic alignment in total knee arthroplasty. J Arthroplasty. 2017;32(9):280–284.
Blakeney WG, Clement ND, Desmeules F, Hagemeister N, Rivière C. Kinematic alignment in total knee arthroplasty improves patient-reported outcomes. Knee Surg Sports Traumatol Arthrosc. 2019;27(6):1981–1989.
Calliess T, Bauer K, Stukenborg-Colsman C, Windhagen H, Budde S. Clinical outcomes of kinematic vs mechanical alignment. Knee Surg Sports Traumatol Arthrosc. 2017;25(8):2605–2612.