Evidence map›Paper›PMID 34415369›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2023

The compartmental approach to revision of partial knee arthroplasty results in nearer-normal gait and improved patient reported outcomes compared to total knee arthroplasty.

Amy J Garner, Oliver W Dandridge, Richard J van Arkel, Justin P Cobb

Registry-linked trialOpen access · hybridAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06883591 (Physical Activity in Patients After Resurfacing and Total Hip Arthroplasty), which is not on this map. Cited by 10 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 1 pooled it
1.3field-weighted citation impact, top 20% 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.

NCT06883591 completednot on this mapstarted 2025, after this paper: background citation

Physical Activity in Patients After Resurfacing and Total Hip Arthroplasty: an Observational Follow-up Study 15 Years After Surgery.

TypeobservationalSponsorRijnstate HospitalRan2025 to 2026Enrolled32ConditionsTotal Hip Arthroplasty (THA), Accelerometers, Resurfacing Hip Arthroplasty
3 · Its place in the literature

Who cites it

10 citing papers in PubMed, 1 synthesis or guideline pooled it, 14 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Current status of bicompartmental arthroplasty.Arthroplasty (London, England) · 2025
    Review
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
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

4 authors at 2 institutions in 1 country.

Amy J GarnerImperial College London, MSk Lab, Sir Michael Uren Biomedical Engineering Research Hub, Imperial College London, White City Campus, 80-92 Wood Lane, London, W12 0BZ, UK. a.garner@imperial.ac.uk.ORCID http://orcid.org/0000-0001-7839-0641
Oliver W DandridgeBiomechanics Group, Department of Mechanical Engineering, Imperial College London, City & Guilds Building, Exhibition Road, London, SW7 9AG, UK.ORCID http://orcid.org/0000-0002-5829-6209
Richard J van ArkelBiomechanics Group, Department of Mechanical Engineering, Imperial College London, City & Guilds Building, Exhibition Road, London, SW7 9AG, UK.ORCID http://orcid.org/0000-0002-1301-1337
Justin P CobbImperial College London, MSk Lab, Sir Michael Uren Biomedical Engineering Research Hub, Imperial College London, White City Campus, 80-92 Wood Lane, London, W12 0BZ, UK.ORCID http://orcid.org/0000-0002-6095-8822
Imperial College London · GBRoyal College of Surgeons of England · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThis study investigated the gait and patient reported outcome measures of subjects converted from a partial knee arthroplasty to combined partial knee arthroplasty, using a compartmental approach. Healthy subjects and primary total knee arthroplasty patients were used as control groups.

methodsTwenty-three patients converted from partial to combined partial knee arthroplasty were measured on the instrumented treadmill at top walking speeds, using standard gait metrics. Data were compared to healthy controls (n = 22) and primary posterior cruciate-retaining total knee arthroplasty subjects (n = 23) where surgery were performed for one or two-compartment osteoarthritis. Groups were matched for age, sex and body mass index. At the time of gait analysis, combined partial knee arthroplasty subjects were median 17 months post-revision surgery (range 4-81 months) while the total knee arthroplasty group was median 16 months post-surgery (range 6-150 months). Oxford Knee Scores and EuroQol-5D 5L scores were recorded at the time of treadmill assessment, and results analysed by question and domain.

resultsSubjects revised from partial to combined partial knee arthroplasty walked 16% faster than total knee arthroplasty (mean top walking speed 6.4 ± 0.8 km/h, vs. 5.5 ± 0.7 km/h p = 0.003), demonstrating nearer-normal weight-acceptance rate (p < 0.001), maximum weight-acceptance force (p < 0.006), mid-stance force (p < 0.03), contact time (p < 0.02), double support time (p < 0.009), step length (p = 0.003) and stride length (p = 0.051) compared to primary total knee arthroplasty. Combined partial knee arthroplasty subjects had a median Oxford Knee Score of 43 (interquartile range 39-47) vs. 38 (interquartile range 32-41, p < 0.02) and reported a median EQ-5D 0.94 (interquartile range 0.87-1.0) vs. 0.84 (interquartile range 0.80-0.89, p = 0.006).

conclusionThis study finds that a compartmental approach to native compartment degeneration following partial knee arthroplasty results in nearer-normal gait and improved patient satisfaction compared to total knee arthroplasty. LEVEL OF EVIDENCE: III.

Indexed as

Arthroplasty, Replacement, KneeOsteoarthritis, KneeGaitHumansKnee JointRange of Motion, ArticularBicompartmentalBi-unicondylarCompartmental arthroplastyGaitMulticompartmental arthroplastySatisfaction

Identifiers

PMID34415369
PMCPMC9957906
OpenAlexW3195383015

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.