ArticleInternational orthopaedics2014
Rotational laxity and collateral ligament laxity following total knee arthroplasty with rotating platform.
Article in International orthopaedics, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Digital measurement of anterolateral knee laxity using strain sensors.Archives of orthopaedic and trauma surgery · 2023Article
- Imageless robotic handpiece-assisted total knee arthroplasty: a learning curve analysis of surgical time and alignment accuracy.Archives of orthopaedic and trauma surgery · 2021Article
- Higher revision rate for posterior cruciate-retaining than posterior-stabilized total knee arthroplasty for the treatment of valgus osteoarthritis.Archives of orthopaedic and trauma surgery · 2021Article
- Using the anatomical tibial axis for total knee arthroplasty alignment may lead to an internal rotation error.International orthopaedics · 2015Article
- Femoral rotation influences dynamic alignment of the lower extremity in total knee arthroplasty.International orthopaedics · 2015Article
- Passive Laxity in Patients With Subjective Instability Following a Cruciate-Retaining Total Knee Arthroplasty: A Pilot Study.JB & JS open accessArticle
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Authors and funding
7 authors.
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No grant is acknowledged in the PubMed record.
Abstract
purposeThe aim of this study was to evaluate laxity in knees with pre-operative (preop) valgus alignment compared to knees with pre-operative varus alignment after total knee arthroplasty (TKA).
methodsThis was a retrospective study including 81 patients, with six years follow-up, for pre-operative valgus- or varus alignment of the leg. All patients had been supplied with the same cruciate retaining (CR) TKA with rotating platform. Clinical findings were assessed by KSS, OKS and IKDC 2000 score. Rotational knee laxity was evaluated by a validated instrument (Laxitester®) with 2 Nm torque in 30° flexion. Collateral ligament laxity was tested manually in 30° flexion with a bending moment of approximately 5 Nm. Biomechanical results were compared to the contralateral side.
resultsThirty-one patients had a preop valgus alignment of 8.96° and 50 patients a varus leg axis of 4.99° in the mean. In the preop valgus knees rotational analysis showed an increased laxity of 10.7° compared to preop varus knees (p = 0.001). There was no significant difference in medial (valgus 2.6 mm, varus 2.5 mm) and lateral (valgus 2.8 mm, varus 2.7 mm) laxity. KSS and OKS showed no significant differences in the follow-up results. In the IKDC 2000 objective score 50 % of the preop varus knees and 25.8 % of the preop valgus knees were classified as nearly normal. The difference in the IKDC objective was highly significant (p < 0.001).
conclusionPreop valgus knees show a significantly increased rotational laxity but no increased collateral ligament laxity compared to pre-operative varus knees six years after TKA with rotating platform. There is a significant difference in IKDC objective.
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