Evidence map›Paper›PMID 34043059›Full record

ArticleEuropean journal of orthopaedic surgery & traumatology : orthopedie traumatologie2022

Is medial pivot total knee arthroplasty suitable for patients with valgus knee osteoarthritis?

Kentaro Iwakiri, Yoichi Ohta, Yohei Ohyama, Yukihide Minoda, Akio Kobayashi, Hiroaki Nakamura

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Article in European journal of orthopaedic surgery & traumatology : orthopedie traumatologie, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed, 1 pooled it
1.3field-weighted citation impact, top 21% of its field
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

4 citing papers in PubMed, 1 synthesis or guideline pooled it, 9 citations in OpenAlex.

  1. Pooled it
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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

6 authors at 2 institutions in 1 country.

Kentaro IwakiriDepartment of Orthopaedic Surgery, Shiraniwa Hospital Joint, Arthroplasty Center. 6-10-1 Shiraniwadai Ikoma-city, Nara, 630-0136, Japan. kenpiecekenpiece@yahoo.co.jp.ORCID http://orcid.org/0000-0002-5906-7715
Yoichi OhtaDepartment of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku Osaka-city, Osaka, 545-8585, Japan.
Yohei OhyamaDepartment of Orthopaedic Surgery, Shiraniwa Hospital Joint, Arthroplasty Center. 6-10-1 Shiraniwadai Ikoma-city, Nara, 630-0136, Japan.
Yukihide MinodaDepartment of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku Osaka-city, Osaka, 545-8585, Japan.
Akio KobayashiDepartment of Orthopaedic Surgery, Shiraniwa Hospital Joint, Arthroplasty Center. 6-10-1 Shiraniwadai Ikoma-city, Nara, 630-0136, Japan.
Hiroaki NakamuraDepartment of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi Abeno-ku Osaka-city, Osaka, 545-8585, Japan.
Osaka City University · JPMiwa Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeMedial pivot total knee arthroplasty (MP-TKA) is characterized by the ball-in-socket medial tibiofemoral articulation to achieve low wear and to reproduce the medial pivot motion similar to that in the normal knee, and there have been reports of favorable long-term postsurgical outcomes. However, most of these cases concerned varus knees, and the outcomes of MP-TKA in valgus knees are unknown. The objective of this study was to investigate the postoperative outcomes in end-stage valgus knee OA patients who underwent MP-TKA, through comparisons with those who underwent TKA using the same prosthesis for varus deformity.

methodsThis retrospective, single-center, cohort study analyzed 171 knees of 121 patients who were divided into two groups (valgus knee group: 15 knees (13 patients), varus knee group: 156 knees (109 patients)). Primary outcome measures included the knee joint range of motion (evaluated preoperatively and at every year postoperatively). Secondary outcomes included operative time, laboratory data, estimated blood loss, clinical outcome measures and adverse events.

resultsThere were no significant differences in age, sex and body mass index, as well as in the postoperative primary and secondary outcome measures between the two groups.

conclusionThe use of MP-TKA featuring ball-in-socket medial tibiofemoral articulation in patients with valgus knee OA showed equally favorable clinical outcomes more than 2 years after surgery, compared to patients with varus knees who received MP-TKA.

Indexed as

Arthroplasty, Replacement, KneeKnee ProsthesisOsteoarthritis, KneeBiomechanical PhenomenaCohort StudiesHumansKnee JointRange of Motion, ArticularRetrospective StudiesComplicationMedial pivotMid-term resultsRange of motionTotal knee arthroplasty

Identifiers

PMID34043059
OpenAlexW3165061235

What OpenQuestion holds

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Registered trials

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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.