ReviewThe open orthopaedics journal2017
Does Postoperative Mechanical Axis Alignment Have an Effect on Clinical Outcome of Primary Total Knee Arthroplasty? A Retrospective Cohort Study.
Review in The open orthopaedics journal, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.
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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
15 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- What is the "safe zone" for transition of coronal alignment from systematic to a more personalised one in total knee arthroplasty? A systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022Pooled it
- 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
- Are current total knee arthroplasty implants tested and approved for personalised alignment?Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- A new parameter in the era of robotic total knee arthroplasty: Coronal alignment at 90° of flexion impacts clinical outcomes.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- The influence of the number of postoperative radiological outliers on the survival and clinical outcome of total knee arthroplasty.Journal of clinical orthopaedics and trauma · 2025Article
- Comparison of Outcomes in Obese Patients after Total Knee Arthroplasty with Neutral or Mild Varus: A Retrospective Study with 8-Year Follow-Up.Orthopaedic surgery · 2024Article
- Appearance and evolution of radiolucent lines below the tibial implant in primary total knee arthroplasty.Archives of orthopaedic and trauma surgery · 2024Article
- Valgus alignment of the femoral component is associated with higher revision rates 10 years after TKA.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
- Article
- Varus morphology and its surgical implication in osteoarthritic knee and total knee arthroplasty.Journal of orthopaedic surgery and research · 2022Article
- [Optimal lower limb alignment and soft tissue balancing strategy for robot-assisted total knee arthroplasty].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2021Article
- [Realistic preclinical finite element simulation in knee and hip replacements].Der Orthopade · 2020Review
- Current evidence base for kinematic alignment.Der Orthopade · 2020Review
- Intact, pie-crusting and repairing the posterior cruciate ligament in posterior cruciate ligament-retaining total knee arthroplasty: A 5-year follow-up.World journal of clinical cases · 2019Article
- Improving Tibial Component Coronal Alignment During Total Knee Arthroplasty with the Use of a Double-Check Technique.Orthopaedic surgery · 2019Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThere is an ongoing debate whether patients with constitutional varus should be restored to neutral mechanical alignment following total knee arthroplasty (TKA).
objectiveThe aim of this retrospective cohort study is to determine whether mild unintentional postoperative varus alignment (3°-6°) influences TKA outcome in patients with and without preoperative varus alignment due to medial osteoarthritis of the knee.
methodsWe analyzed 172 consecutive TKA cases between April 2011 and May 2014. Patients were divided into four groups based on their preoperative and postoperative hip-knee-ankle angles (HKA): preoperative varus ≤ 3° with postoperative varus position ≤ 3° (Group 1, n = 47); preoperative varus >3° with postoperative varus ≤ 3° (Group 2, n = 104); preoperative varus ≤ 3° with postoperative varus malalignment > 3° (Group 3, n = 3); and preoperative varus > 3° with postoperative varus malalignment > 3° (Group 4, n = 18). Patients were followed up until 2 years postoperatively.
resultsKnee Society Score and Western Ontario and McMaster University Osteoarthritis Index scores for all study groups increased following TKA, with no postoperative differences at any time point. Group 4 performed significantly better on the Forgotten Joint Score than Group 2 (p = 0.019). Group 4 performed significantly better on the High Flexion Knee Score than Group 2 (p = 0.004) and Group 1 (p = 0.019). All other between-group differences were not statistically significant.
conclusionResidual postoperative varus alignment of the lower limb does not appear to adversely affect clinical outcome following TKA for varus-type osteoarthritis.
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