ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2018
The medial tibial joint line elevation over 5 mm restrained the improvement of knee extension angle in unicompartmental knee arthroplasty.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Author's reply to the Letters regarding 'Selecting between UKA and HTO in the grey zone'.Journal of orthopaedic translation · 2026Article
- How to choose treatment for patients who are eligible for both unicompartmental knee arthroplasty and high tibial osteotomy?Journal of orthopaedic translation · 2026Review
- Amount of mechanical hip-knee-ankle (mHKA) angle correction by fixed-bearing medial UKA can be predicted using a new morphological assessment method: the arithmetic hip-knee-ankle (aHKA) angle.Archives of orthopaedic and trauma surgery · 2025Article
- Analysis of correlation between medial joint line change and lower limb coronal alignment after Oxford unicompartmental knee arthroplasty.Clinics (Sao Paulo, Brazil) · 2024Article
- [Effect of prosthetic joint line installation height errors on insert wear in unicompartmental knee arthroplasty].Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi · 2023Article
- Patellar height after unicompartmental knee arthroplasty: comparison between fixed and mobile bearing.Archives of orthopaedic and trauma surgery · 2022Article
- Low femoral component prominence negatively influences early revision rate in robotic unicompartmental knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2020Article
- Unicompartmental knee arthroplasty, an enigma, and the ten enigmas of medial UKA.Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2020Review
- Improved implant alignment accuracy with an accelerometer-based portable navigation system in medial unicompartmental knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2020Article
- A modified technique for tibial bone sparing in unicompartmental knee arthroplasty.Chinese medical journal · 2019Article
Corrections and comments
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Authors and funding
11 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThe purpose of this study was to examine the relationship between medial tibial joint line elevation and the improvement of range of motion (ROM) in unicompartmental knee arthroplasty (UKA). The hypothesis was that limited elevation of tibial joint line will improve knee range of motion in UKA.
methodsForty-six consecutive medial UKAs were enrolled in this study. Medial tibial joint line elevation was defined as the polyethylene insert and tibial tray thickness minus the tibial osteotomy and sawblade thickness. Positive values indicated an elevation of the tibial joint line. A component gap between the femoral trial prosthesis and the medial tibial osteotomy surface was also examined. Joint loosening was also calculated based on the joint component gap minus insert and tibial tray thickness. The correlation of the medial tibial joint line elevation with joint looseness and postoperative range of motion were analyzed.
resultsThe mean medial tibial joint line elevation was 4.9 ± 1.1 mm. The medial tibial joint line elevation reduced the improvement of knee extension (R = - 0.43, p < 0.01). The medial tibial joint line elevation was also correlated with reduced loosening of the joint knee extension (R = - 0.42, p < 0.01). This, in turn, resulted in limited improvement of the knee extension angle. Moreover, joint line elevation under 5 mm significantly improved knee extension angle compared to joint line elevation over 5 mm.
conclusionsThe medial joint line elevation of the tibia in UKA reduced the improvement of knee extension angle, due to a reduced joint looseness at knee extension. A tibial joint line elevation greater than 5 mm in UKA should be avoided to prevent postoperative flexion contracture. For the clinical relevance, this study clarified that the medial joint line of the tibia is an important factor to prevent postoperative flexion contracture in UKA. LEVEL OF EVIDENCE: II.
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