ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2016
Decreased extension gap and valgus alignment after implantation of total knee prosthesis in primary varus knees.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed, 14 citations in OpenAlex.
- Discrepancy between predicted and actual soft tissue balance in robot-assisted total knee arthroplasty.Journal of orthopaedics · 2025Article
- Joint line elevation is not associated with mid-flexion laxity in patients with varus osteoarthritis after total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2020Article
- New method for acquiring the expected extension gap in total knee arthroplasty.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2020Article
- Manual Stress and Gap Spacer Systematically Underestimate Intraoperative Joint Gaps Compared with a Tensor Device in Robotic-Assisted Total Knee Arthroplasty.JB & JS open accessArticle
Corrections and comments
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Authors and funding
8 authors at 5 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeIt was hypothesised that implantation of a total knee prosthesis may change the size and shape of the joint gap. To test this hypothesis, a tensor device was used which was specifically designed to reproduce the conditions before and after implantation, including attachment of the polyethylene insert trial. This study aimed to compare the joint gaps before and after implantation of a total knee prosthesis using this new tensor device.
methodsA total of 259 primary varus knees were included in this study. Knees were exposed using a medial parapatellar approach, and the anterior and posterior cruciate ligaments were resected. After the trial reduction, the intraoperative joint gap kinematics was measured using the tensor device.
resultsImplantation of a total knee prosthesis decreased the size of the extension joint gap and made it valgus, but did not influence the size or shape of the flexion joint gap.
conclusionsThe present findings suggest that the classical gap technique, which creates equal and rectangular extension and flexion joint gaps in the bone cutting surface, results in an imbalance between the extension and flexion joint gaps after implantation. To achieve equal and rectangular extension and flexion joint gaps after implantation, the prepared extension joint gap should be about 2 mm larger than the flexion joint gap and slightly varus before implantation in primary varus knees. LEVEL OF EVIDENCE: Therapeutic study, Level II.
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