ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2017
Association between anteroposterior laxity in mid-range flexion and subjective healing of instability after total knee arthroplasty.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 2 of them syntheses that pooled it.
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Who cites it
27 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Midflexion instability in total knee arthroplasty: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021Pooled it
- Relationship between outcome scores and knee laxity following total knee arthroplasty: a systematic review.Acta orthopaedica · 2019Pooled it
- Increased medial component gap at 30° flexion is associated with subjective instability and worse patient-reported outcomes after image-free robot-assisted total knee arthroplasty.Journal of experimental orthopaedics · 2026Article
- Is it time for a systematic and objective assessment of knee laxity? The impact of objective knee laxity after TKA on patient-reported outcomes: a comprehensive review.Archives of orthopaedic and trauma surgery · 2026Review
- Neuromuscular Characteristics Associated with Knee Instability in Osteoarthritis and After Total Knee Replacement: A Systematic Review and Meta-Analysis.Clinics and practice · 2026Review
- Dynamic joint balancing provides consistent gap prediction without a learning curve in robotic-assisted total knee arthroplasty.Journal of robotic surgery · 2025Article
- Mid-Flexion Sagittal Stability of Total Knee Arthroplasty Implanted With Kinematic Alignment: A Quantitative Radiographic Laxity Study With Single-Radius Posterior-Stabilized and Condylar-Stabilized Implants.Arthroplasty today · 2025Article
- A machine learning approach using gait parameters to cluster TKA subjects into stable and unstable joints for discovery analysis.The Knee · 2025Article
- Image-free robotic-assisted total knee arthroplasty is associated with joint line distalization and improves mid-flexion instability: A prospective cohort study.Journal of experimental orthopaedics · 2025Article
- Medial soft tissue release is also related to the anterior stability of cruciate-retaining total knee arthroplasty: a cadaveric study.Knee surgery & related research · 2024Article
- Changes in the anteroposterior position of the femur relative to the tibia impact patient satisfaction in total knee arthroplasty.BMC musculoskeletal disorders · 2024Article
- Effect of posteromedial vertical capsulotomy with medial collateral ligament liberation on intraoperative medial component gap mismatch between extension and mid-flexion during total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
- Limited medial posterior capsular release increases the intraoperative medial component gap while maintaining the joint varus angle at extension in posterior-stabilized total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
- [Cumulative sum control chart analysis of soft tissue balance in total knee replacement assisted by electronic pressure sensor].Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences · 2023Article
- Article
- Significantly earlier ambulation and reduced risk of near-falls with continuous infusion nerve blocks: a retrospective pilot study of adductor canal block compared to femoral nerve block in total knee arthroplasty.BMC musculoskeletal disorders · 2022Article
- Inter-Rater Reliability of Clinical Testing for Laxity After Knee Arthroplasty.The Journal of arthroplasty · 2022Article
- Stress Radiograph Confirmation of Translational Instability After Cruciate-Retaining Total Knee Arthroplasty.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2022Article
- The higher patient-reported outcome measure group had smaller external rotation of the femur in bicruciate-stabilized total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022Article
- Management of instability after primary total knee arthroplasty: an evidence-based review.Journal of orthopaedic surgery and research · 2021Review
Corrections and comments
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Authors and funding
11 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeFlexion instability following total knee arthroplasty (TKA) is a common indication of early revision. The association between the objective anteroposterior (AP) laxity direction in mid-range flexion and the subjective healing of instability remains unclear; thus, this study aimed to clarify this association.
methodsIn this study, 110 knees (74 females, 92 knees; 16 males, 18 knees) with medial pivot implants were examined with a median age of 79 (range 60-92) years for a median follow-up duration of 22 (range 6-125) months. AP laxity was measured using a KT-1000 arthrometer. Self-reported knee instability score was used for the subjective healing of instability.
resultsEighty-seven knees did not feel unstable (Group 0), whereas 23 knees felt unstable (Group 1). There was a significant difference in AP displacement [Group 0: median 6 mm; range 2-15 mm and Group 1: median 8 mm; range 4-14; p < 0.0001]. The threshold value of 7 mm was determined using the area under receiver operating characteristic curve of 0.79 [95% confidence interval (CI) 0.69-0.88, p < 0.0001]. In multivariate analysis, AP displacement of ≥7 mm was an independent risk factor for feelings of instability (odds ratio 7.695; 95% CI 2.306-25.674; p = 0.001).
conclusionsAP laxity of ≥7 mm represents a known cause of feelings of instability. By controlling AP laxity in TKAs, without stiffness in the knee, it is possible to prevent feelings of instability. The clinical relevance is that AP laxity of <7 mm is one of the target areas in TKA. LEVEL OF EVIDENCE: IV.
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