Evidence map›Paper›PMID 33155090›Full record

Trial reportKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2021

Superior patient satisfaction in medial pivot as compared to posterior stabilized total knee arthroplasty: a prospective randomized study.

Sahil Batra, Rajesh Malhotra, Vijay Kumar, Deep Narayan Srivastava, David Backstein, Hemant Pandit

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 4 pooled it
4.1field-weighted citation impact, top 5% 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

20 citing papers in PubMed, 4 syntheses or guidelines pooled it, 37 citations in OpenAlex.

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  9. Medial pivot total knee arthroplasty.Journal of clinical orthopaedics and trauma · 2025
    Review
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  18. Medial pivot-based total knee arthroplasty achieves better clinical outcomes than posterior-stabilised total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023
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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 3 institutions in 3 countries.

Sahil BatraDepartment of Orthopaedics, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India.
Rajesh MalhotraDepartment of Orthopaedics, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India. rmalhotra62@gmail.com.ORCID http://orcid.org/0000-0001-5971-003X
Vijay KumarDepartment of Orthopaedics, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India.
Deep Narayan SrivastavaDepartment of Radiodiagnosis, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India.
David Backstein *Division of Orthopaedics, Granovsky Gluskin Chair in Complex Hip & Knee Reconstruction, Sinai Health System, University of Toronto, Toronto, Canada.
Hemant Pandit *Chapel Allerton Hospital, University of Leeds, Leeds, UK.
All India Institute of Medical Sciences · INUniversity of Leeds · GBUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeMedial pivot (MP) total knee arthroplasty (TKA) aims to restore native knee kinematics due to highly conforming medial tibio-femoral articulation with survival comparable to contemporary knee designs. Posterior stabilized (PS) TKAs use cam-post mechanism to restore native femoral rollback. However, there is conflicting evidence regarding the reported patient satisfaction with MP TKA designs when compared to PS TKAs. The primary aim of this study is to compare the patient satisfaction between MP and PS TKA and the secondary aim is to establish potential reasons behind any differences in the outcomes noted between these two design philosophies.

methodsIn this IRB-approved single surgeon, single centre prospective RCT, 53 patients (mean age 62 years, 42 women) with comparable bilateral end-stage knee arthritis undergoing simultaneous bilateral TKA were randomized to receive MP TKA in one knee and PS TKA in the contralateral knee. At 4 years post-surgery, all patients were assessed using Knee Society Score (KSS)-Satisfaction and -Expectation scores, and Oxford Knee Score (OKS). In addition, all the patients underwent standardized radiological and in vivo kinematic assessment.

resultsPatients were more satisfied with the MP TKA as compared to PS TKA: mean KSS-Satisfaction [34.5 ± 3.05 in MP and 31.7 ± 3.16 in PS TKAs (p < 0.0001)] and mean KSS-Expectation scores [12.5 ± 1.39 in MP TKAs and 11.2 ± 1.41 in PS TKAs (p < 0.0001)]. No significant difference was noted in any other clinical outcomes. The in vivo kinematics of MP TKAs was significantly better than those of PS TKAs.

conclusionMP TKAs provide superior patient satisfaction and patient expectations as compared to PS TKA. This may be related to better replication of natural knee kinematics with MP TKA. LEVEL OF EVIDENCE: I.

Indexed as

Arthroplasty, Replacement, KneeKnee ProsthesisOsteoarthritis, KneeBiomechanical PhenomenaFemaleHumansKnee JointMiddle AgedPatient SatisfactionProspective StudiesProsthesis DesignRange of Motion, ArticularKinematicsMedial pivotPatient expectationsPatient satisfactionPosterior stabilizedTotal knee arthroplasty

Identifiers

PMID33155090
OpenAlexW3097650303

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.