ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2013
Flexion and extension laxity after medial, mobile-bearing unicompartmental knee arthroplasty: a comparison between a spacer- and a tension-guided technique.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.
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Who cites it
11 citing papers in PubMed, 2 syntheses or guidelines pooled it, 14 citations in OpenAlex.
- Mean distraction force applied in tension-controlled ligament-balanced total knee arthroplasty: A systematic review and meta-analysis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Pooled it
- Fixed- versus mobile-bearing UKA: a systematic review and meta-analysis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2015Pooled it
- Measured Resection as Gap Balance Method in Mobile-Bearing Medial Unicompartmental Knee Arthroplasty: A Randomized Controlled Trial.Orthopaedic surgery · 2025Trial
- [Recommendations for unicondylar knee replacement in the course of time : A current inventory].Der Orthopade · 2021Review
- Individualized surgery in primary total knee arthroplasty.EFORT open reviews · 2020Review
- What is a balanced knee replacement?EFORT open reviews · 2018Article
- Balancing mobile-bearing unicondylar knee arthroplasty in vitro.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2017Article
- Patient-related factors influence stiffness of the soft tissue complex during intraoperative gap balancing in cruciate-retaining total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2017Observational
- The measurement of medial knee gap width using ultrasound.Archives of orthopaedic and trauma surgery · 2017Article
- Correction of coronal alignment correlates with reconstruction of joint height in unicompartmental knee arthroplasty.Bone & joint research · 2015Article
- The coronal alignment after medial unicompartmental knee arthroplasty can be predicted: usefulness of full-length valgus stress radiography for evaluating correctability.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2014Article
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Authors and funding
5 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeIn a mobile-bearing unicompartmental knee arthroplasty (UKA), stability is of utmost importance to promote knee function and to prevent dislocation of the insert. Gap balancing can be guided by the use of spacers or a tensioner. The goal of this study is to compare laxity of a tension-guided implantation technique versus a spacer-guided technique for medial UKA with a mobile bearing. Also clinical function was compared between the groups.
methodsThe tension-guided UKA system (BalanSys™, Mathys Ltd, Bettlach, Switzerland) was compared with a retrospective group with a spacer-guided system (Oxford, Biomet Ltd, Bridgend, UK). A total of 30 tension-guided medial UKAs were implanted and compared with 35 spacer-guided medial prostheses. In both groups, valgus laxity was measured at least 4 months postoperatively in extension and 70° flexion using stress radiographs. Knee Society Scores (KSS) were obtained at the 6-month follow-up.
resultsValgus laxity in flexion was significantly higher in the tension-guided group compared with the spacer-guided group: 3.9° (SD 1.8°) versus 2.4° (SD 1.2°), respectively, P < 0.001). In extension, valgus laxity was significantly different: 1.8° (SD 1.0°) in the tension-guided group compared with 2.7° (SD 0.9°) in the spacer-guided group (P < 0.001). There was no significant difference between the KSS for the two groups (n.s.).
conclusionsThe tensor-guided system resulted in significantly more valgus laxity in flexion compared with the spacer-guided system. However, in extension, the situation was reversed: the tension-guided system resulted in less valgus laxity than the spacer-guided system. Clinically, there were no differences between the groups. The valgus laxity found with the spacer-guided system better approximates the valgus laxity values of the healthy elderly.
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