ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2025
The Forgotten Joint Score after total knee arthroplasty with a kinematic alignment-optimized femoral component matches total hip arthroplasty.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.
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Who cites it
9 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Alignment strategy does not confer clinically meaningful advantages in medial pivot total knee arthroplasty: a systematic review and meta-analysis.Journal of orthopaedic surgery and research · 2026Pooled it
- Posterior cruciate ligament management in medial pivot total knee arthroplasty: a systematic review and meta-analysis.Journal of orthopaedic surgery and research · 2026Pooled it
- Deep Learning-Based Full-Process Automatic CPAK Classification System and Its Application in the Analysis of Alignment Outcomes Before and After Knee Arthroplasty.Diagnostics (Basel, Switzerland) · 2026Article
- Unrestricted kinematic alignment total knee arthroplasty provides favourable five-year outcomes regardless of varus severity in Japanese patients.Journal of experimental orthopaedics · 2026Article
- Switching From a 6° to a 20° Valgus Prosthetic Trochlear Groove Improved the Forgotten Joint and Oxford Knee Scores After Kinematically Aligned Total Knee Arthroplasty.Arthroplasty today · 2026Article
- Cartilage thickness at the apex of femoral resections in kinematically aligned total knee arthroplasty is close to 2.5 millimeters.Journal of experimental orthopaedics · 2026Article
- Restoration of the trochlear peaks is unnecessary with a kinematic alignment-optimized femoral component as under-stuffing results in equivalent or better patient-reported outcome scores.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- The Forgotten Joint Score after total knee arthroplasty with a kinematic alignment-optimized femoral component matches total hip arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- High coronal alignment accuracy and satisfactory early outcomes using augmented reality assisted kinematic alignment in total knee arthroplasty.Journal of experimental orthopaedics · 2025Article
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeIn kinematic alignment (KA) total knee arthroplasty (TKA), 50% of patients treated with a femoral component that has a 6° valgus prosthetic trochlear groove (PTG) show an abnormal quadriceps line of pull directed laterally to the groove. Lateral misalignment is reported to decrease the Forgotten Joint Score (FJS) by 17-24 points. Therefore, this study aimed to determine whether using a femoral component with a 20° valgus PTG, which minimizes the risk of lateral misalignment, can achieve a mean FJS that meets the 70-point threshold for a successful outcome in total hip arthroplasty (THA) and the mean value of 67 points for knees in the U.S. POPULATION:
methodsThe study analyzed the first 127 patients who underwent KA TKA with the 20° valgus KA-optimized femoral component. At a minimum 2-year follow-up, patients were sent an online survey to complete the FJS and Oxford Knee Score (OKS) to assess function and report instances of revision knee surgery. Ten of the 127 cases were excluded: two required revision surgery. Four patients did not complete the questionnaire but reported no reoperations. The families of two individuals who passed away provided the same response. Two patients could not be contacted.
resultsThe analysis focused on 117 KA TKAs, with a mean FJS of 75 points, 5 points higher than the 70-point threshold considered successful for THA and exceeding the normative value of 67 points for knees. The mean OKS was 43 points.
conclusionPrimary KA TKA with a 20° valgus PTG can achieve an FJS comparable to THA with high functionality, as shown by 70% and 25% of subjects receiving an excellent (48-42) or good (41-34) OKS. LEVEL OF EVIDENCE: Level III.
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