ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2026
Medial-pivot design total knee arthroplasty provides higher post-operative patient satisfaction than posterior-stabilized design under mechanical alignment.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Quadriceps muscle status after medial-pivot versus ultracongruent total knee arthroplasty using localized bioimpedance analysis: a randomized exploratory study.Arthroplasty (London, England) · 2026Article
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6 authors.
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Abstract
purposeNumerous studies have compared post-operative patient-reported outcome measures (PROMs) between medial-pivot design total knee arthroplasty (MP-TKA) and posterior-stabilized design TKA (PS-TKA); however, whether MP-TKA demonstrates superior outcomes remains controversial. This study aimed to compare post-operative PROMs between MP-TKA and PS-TKA under mechanical alignment, using implants from the same manufacturer to eliminate the influence of shape, thereby focusing solely on the differences in articular surface design.
methodsA total of 141 TKAs from the same manufacturer were retrospectively assessed, comprising 71 MP-TKAs and 70 PS-TKAs. Knee range of motion and PROMs, including the Knee Society Score-2011 (KSS-2011) and Forgotten Joint Score-12 (FJS-12), were evaluated at 3, 6 and 12 months post-operatively and annually thereafter, and compared between the MP-TKA and PS-TKA groups. The mean follow-up period was 51 ± 13 and 50 ± 17 months in the MP-TKA and PS-TKA groups, respectively (p = 0.535).
resultsThe post-operative knee flexion angle was smaller in the MP-TKA group than in the PS-TKA group (124 ± 13 vs. 132 ± 13, p < 0.001). However, the change in knee flexion angle from the preoperative values between the two groups (5 ± 15 vs. 6 ± 15, p = 0.752) showed no difference. Compared with the PS-TKA group, the MP-TKA group showed higher KSS-2011 scores for symptoms (22 ± 3 vs. 19 ± 6, p = 0.002), satisfaction (32 ± 8 vs. 28 ± 10, p = 0.020) and functional activities (79 ± 16 vs. 71 ± 22, p = 0.041). The MP-TKA group had a higher FJS-12 total score than did the PS-TKA group (73 ± 24 vs. 64 ± 27, p = 0.025).
conclusionsMP-TKA demonstrated better PROMs than did PS-TKA under mechanical alignment. Implant design with greater antero-posterior stability could improve post-operative outcomes after TKA. LEVEL OF EVIDENCE: Level III.
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