Evidence map›Paper›PMID 34792611›Full record

SynthesisKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2022

Insufficient evidence to confirm benefits of custom partial knee arthroplasty: a systematic review.

Guillaume Demey, Jacobus H Müller, Michael Liebensteiner, Peter Pilot, Luca Nover, European Knee Associates (EKA), Nanne Kort

Abstract readSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 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

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

  1. Insufficient evidence to confirm benefits of custom partial knee arthroplasty: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
    Pooled it
  2. [The importance of individual knee arthroplasty].Orthopadie (Heidelberg, Germany) · 2025
    Article
  3. Observational
  4. Article
  5. Article
  6. Personalisation and customisation in total knee arthroplasty: the paradox of custom knee implants.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023
    Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Custom TKA combined with personalised coronal alignment yield improvements that exceed KSS substantial clinical benefits.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
    Article
  13. Article
  14. 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

7 authors.

Guillaume DemeyLyon-Ortho-Clinic, Clinique de la Sauvegarde, Ramsay Santé, 29 Avenue des Sources, 69009, Lyon, France.
Jacobus H MüllerReSurg SA, Rue Saint-Jean 22, 1260, Nyon, Switzerland. cobus@resurg.com.
Michael LiebensteinerDepartment of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstrase 35, 6020, Innsbruck, Austria.
Peter PilotIMUKA, Roosteren, The Netherlands.
Luca NoverReSurg SA, Rue Saint-Jean 22, 1260, Nyon, Switzerland.
European Knee Associates (EKA)
Nanne KortCortoClinics, Nederweert, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe purpose of this systematic review was to synthesise the available literature and critically appraise current evidence on the functional and radiographic outcomes as well as reoperation and revision rates of custom partial knee arthroplasty, i.e., unicompartmental knee arthroplasty (UKA), bicompartmental knee arthroplasty (BKA), and patellofemoral arthroplasty (PFA). MATERIAL AND

methodsThis systematic review was performed in accordance with the guidelines of Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), and a protocol was registered with Prospero. On 25 May 2021, two authors independently searched and screened Level I-IV studies that reported on outcomes of custom partial knee arthroplasty using the databases of MEDLINE

resultsFifteen articles were eligible for data extraction, of which two comparative and four case series were on custom UKA (follow-up, 0-9 months), one comparative and five case series on custom BKA (follow-up, 0.25-72 months), and three case series on custom PFA (follow-up, 2-119 months). Three studies on custom UKA reported mean Knee Society Score (KSS) Knee of 86-94 and mean KSS Function of 94-95, and two studies on custom BKA reported mean KSS Knee of 90-94 and KSS function of 81, whereas one study on custom PFA reported KSS Knee of 91 and KSS Function of 89. Custom implants tended to have less bone-implant mismatch compared to off the shelf (OTS) implants. Revision rates were 3-25% for custom UKA (at 0-109 months), 3-5% for custom BKA (at 12-72 months), and 0-14% for custom PFA (at 2-119 months).

conclusionDue to the small number of comparative studies and lack of consistency in reported outcomes, it remains difficult to ascertain the benefits of custom partial knee arthroplasty. Anecdotal evidence suggests that, compared to OTS implants, custom implants result in less bone-implant mismatch and that 78-91% of patients are either satisfied or very satisfied after custom partial knee arthroplasty. LEVEL OF EVIDENCE: IV.

Indexed as

Arthroplasty, Replacement, KneeKnee ProsthesisOsteoarthritis, KneeHumansKnee JointTreatment OutcomeArthroplasty, replacement, kneeKneeKnee prosthesisPartial knee arthroplastyPatient outcome assessmentPatient reported outcome measures

Identifiers

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.