Evidence map›Paper›PMID 28493211›Full record

ArticleInternational orthopaedics2017

What mechanisms are associated with tibial component failure after kinematically-aligned total knee arthroplasty?

Alexander J Nedopil, Stephen M Howell, Maury L Hull

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Article in International orthopaedics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing 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

37 citing papers in PubMed, 1 synthesis or guideline 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

3 authors.

Alexander J NedopilDepartment of Orthopaedics, University of California, Davis, 4860 Y Street, Suite 3800, Sacramento, CA, 95817, USA. nedopil@ucdavis.edu.ORCID 0000-0002-3655-158X
Stephen M HowellBiomedical Engineering Graduate Group, University of California, Davis, Davis, CA, 95616, USA.
Maury L HullDepartment of Mechanical Engineering, University of California, Davis, Davis, CA, 95616, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeEight patients treated with kinematically-aligned (KA) total knee arthroplasty (TKA) presented with tibial component failure. We determined whether radiographic measurements and clinical characteristics are different between patients with and without tibial component failure to identify mechanisms of failure and strategies to reduce the risk.

methodsOut of 3,212 primary TKAs (2,725 TKAs with a two-year minimum follow up), of which all were performed with KA, eight patients presented with tibial component failure. Radiographic measurements, clinical characteristics (e.g. age, gender, BMI, etc.), revision surgical records, and Oxford knee scores were compared to control cohort patients matched 1:3.

resultsTibial component failure presented at an average of 28 ± 15 months after primary TKA. Patients with tibial component failure had a 6 kg/m

conclusionsThe incidence of tibial component failure after KA TKA was 0.3% and was caused by posterior subsidence or posterior edge wear and not varus subsidence. The strategy for lowering the risk of tibial component failure when performing KA is to set the tibial component parallel to the flexion-extension plane (slope) and varus-valgus plane of the native joint line.

Indexed as

AgedArthroplasty, Replacement, KneeBiomechanical PhenomenaCase-Control StudiesDatabases, FactualFemaleFollow-Up StudiesHumansIncidenceKnee JointKnee ProsthesisMaleMiddle AgedProsthesis FailureReoperationRetrospective StudiesKinematic alignmentKnee arthroplastyOxford knee scorePosterior slope of the tibial componentTibial component failure

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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.