ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2014
Improved design decreases wear in total knee arthroplasty with varus malalignment.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.
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Who cites it
10 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.
- Comparison of Outcomes After Total Knee Arthroplasty Involving Postoperative Neutral or Residual Mild Varus Alignment: A Systematic Review and Meta-analysis.Orthopaedic surgery · 2022Pooled it
- No difference in in vivo polyethylene wear particles between oxidized zirconium and cobalt-chromium femoral component in total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2014Trial
- Does Knee Prosthesis Survivorship Improve When Implant Designs Change? Findings from the Australian Orthopaedic Association National Joint Replacement Registry.Clinical orthopaedics and related research · 2020Article
- Preoperative tibial mechanical axis orientation and articular surface design influence on the coronal joint line orientation relative to the ground during gait after total knee arthroplasties.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2018Article
- Computational study on the effect of malalignment of the tibial component on the biomechanics of total knee arthroplasty: A Finite Element Analysis.Bone & joint research · 2017Article
- Remaining mild varus limb alignment leads to better clinical outcome in total knee arthroplasty for varus osteoarthritis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2017Article
- Varus femoral and tibial coronal alignments result in different kinematics and kinetics after total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2017Article
- Malpositioning of Prosthesis: Patient-specific Total Knee Arthroplasty Versus Standard Off-the-Shelf Total Knee Arthroplasty.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2017Article
- Ligament balancing in total knee arthroplasty-Medial stabilizing technique.Asia-Pacific journal of sports medicine, arthroscopy, rehabilitation and technology · 2015Review
- Loading on Attune® fixed-bearing cruciate-substituting total knee implant in knee malalignment during activities of daily living: A finite element analysis.Journal of orthopaedicsArticle
Corrections and comments
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Authors and funding
10 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeControversy still exists whether coronal malalignment would influence the long-term survival of total knee arthroplasty (TKA). The hypothesis was that an improved design of the articular surface of modern TKA would prevent the increase in contact stresses and thus decrease the wear even when the implant was placed in a varus position. Two different designs of TKA were compared biomechanically and clinically.
methodsThe patients whose prosthesis was initially placed in a varus alignment by the postoperative long-leg radiographs were selected. Seventeen knees using the NexGen LPS and 16 knees using the MG I were examined. Changes in postoperative alignment and the thickness of the polyethylene insert in a follow-up period of approximately 7 years were evaluated. Additionally, an in vitro biomechanical testing was conducted to measure the contact stresses and the contact area at the tibiofemoral joint of the NexGen LPS and the MG I components mounted on a servohydraulic testing device.
resultsAlthough the long-leg alignment did not change in NexGen LPS, the varus alignment significantly progressed in MG I. The thickness of polyethylene insert in MG I decreased a significantly greater amount compared with that in NexGen LPS. Biomechanical test showed that the NexGen LPS had a larger contact area and lower mean and peak contact stresses than the MG I significantly.
conclusionThese results suggest that comprehensive factors of modern prosthesis including improved implant designs could improve the durability of polyethylene insert and decrease implant failures due to component malalignment.
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