Evidence map›Paper›PMID 29854339›Full record

ArticleClinics in orthopedic surgery2018

Is Immediate Postoperative Mechanical Axis Associated with the Revision Rate of Primary Total Knee Arthroplasty? A 10-Year Follow-up Study.

Ju-Kwon Park, Jong-Keun Seon, Kyu-Jin Cho, Nam-Hoon Lee, Eun-Kyoo Song

Abstract read
In one paragraph

Article in Clinics in orthopedic surgery, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 3 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
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  4. Trial
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  6. Article
  7. Are current total knee arthroplasty implants tested and approved for personalised alignment?Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026
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  12. Precision of the ultrasonography-integrated tibial extramedullary guide for total knee arthroplasty.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2024
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  17. Hip-to-calcaneus alignment differs from hip-to-talus alignment in patients with genu varum deformity.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Ju-Kwon ParkCenter for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
Jong-Keun SeonCenter for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
Kyu-Jin ChoCenter for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
Nam-Hoon LeeCenter for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
Eun-Kyoo SongCenter for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAchieving neutral limb alignment during total knee arthroplasty (TKA) has been considered an important determinant in the long-term prosthesis survival. The purpose of this study was to evaluate the association between the immediate postoperative mechanical alignment of the lower limb and the rate of revision TKA by comparing an acceptable mechanical axis group (within ± 3° from neutral alignment) and an outlier group (> 3° deviation from neutral alignment).

methodsBetween 2000 and 2006, clinical and radiographic data of 334 primary TKAs were retrospectively reviewed to determine the 10-year Kaplan-Meier survival rate. Patients were divided into acceptable and outlier groups according to the mechanical axis checked postoperatively within a month. Clinical outcomes were assessed using Hospital for Special Surgery, Knee Society Score, and Western Ontario and McMaster Universities Osteoarthritis Index score preoperatively and at the final follow-up. Postoperative complications and revision rates were also evaluated.

resultsThe mean change in mechanical axis between the immediate postoperative examination and the last follow-up was greater in the outlier group (1.6 ± 2.7) than in the acceptable group (0.8 ± 2.4). The revision rates were significantly different between the two groups (

conclusionsRestoration of neutral limb alignment is a factor that can result in a lower revision rate and higher longevity in TKA. However, there were no significant differences in clinical outcomes between the two groups.

Indexed as

Arthroplasty, Replacement, KneeAgedFemaleFollow-Up StudiesHumansKaplan-Meier EstimateMalePostoperative ComplicationsProsthesis FailureRange of Motion, ArticularTreatment OutcomeMechanical alignmentOutliersSurvival rateTotal knee arthroplasty

Identifiers

PMID29854339
PMCPMC5964264

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.