Total Knee Arthroplasty Clinical Outcomes
Summary
Total knee arthroplasty (TKA) is the definitive surgical intervention for advanced knee joint pathology, notably osteoarthritis and rheumatoid arthritis. Clinical outcomes continue to improve through advances in implant design, surgical technique and perioperative care. Contemporary practice emphasises not only durable implant survival but also high levels of patient-reported function, pain relief and overall satisfaction. Large registry data and systematic reviews demonstrate that around 80 % of primary TKAs remain functional at 25 years, yet failure modes such as periprosthetic joint infection, aseptic loosening and mechanical malalignment continue to drive revision surgery. Emerging technologies—including sensor-assisted balancing, computer navigation and robotic-assisted systems—have shown gains in accuracy of component positioning, soft-tissue tensioning and personalised alignment strategies. Such innovations appear to reduce early functional deficits and may expedite rehabilitation, although learning curves and cost-benefit considerations require ongoing evaluation. Alignment philosophies have evolved from traditional mechanical alignment towards kinematic, inverse kinematic and functional alignment approaches, each seeking to restore native joint line obliquity and ligament balance. Globally, TKA remains a cost-effective intervention that restores mobility and quality of life for millions annually. Current research integrates biomechanical insights with molecular studies of arthrofibrosis and implant–bone interface biology to mitigate complications and extend implant longevity, while challenges persist in standardising outcome measures and ensuring equitable access to advanced technologies.
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Total Knee Arthroplasty Clinical Outcomes publication trend
The graph below shows the total number of articles in total knee arthroplasty clinical outcomes across all publications each year (not limited to Nature Index journals).
Technical terms
Total Knee Arthroplasty (TKA): Surgical replacement of the knee joint surfaces with prosthetic components to relieve pain and restore function.
Periprosthetic Joint Infection (PJI): Infection involving the prosthetic joint and surrounding tissues, a leading cause of revision surgery.
Aseptic Loosening: Non-infectious failure of the bond between implant and bone, often due to wear debris and resultant osteolysis.
Robotic-Assisted TKA: Use of robotic systems to plan and execute bone resections and implant positioning with high precision.
Kinematic Alignment: Alignment technique that restores the patient’s native joint line orientation and ligament tension rather than enforcing a neutral mechanical axis.
References
- How long does a knee replacement last? A systematic review and meta-analysis of case series and national registry reports with more than 15 years of follow-up. The Lancet (2019).
- Analysis of Total Knee Arthroplasty revision causes. BMC Musculoskeletal Disorders (2018).
- A New Method for Defining Balance Promising Short-Term Clinical Outcomes of Sensor-Guided TKA. The Journal of Arthroplasty (2013).
- Robotic‐arm assisted total knee arthroplasty is associated with improved accuracy and patient reported outcomes: a systematic review and meta‐analysis. Knee Surgery, Sports Traumatology, Arthroscopy (2021).
- Robotic‐arm assisted total knee arthroplasty has a learning curve of seven cases for integration into the surgical workflow but no learning curve effect for accuracy of implant positioning. Knee Surgery, Sports Traumatology, Arthroscopy (2018).
- Personalized alignment in total knee arthroplasty: current concepts. SICOT-J (2021).
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