Evidence map›Paper›PMID 35138455›Full record

ArticleInternational orthopaedics2022

Subtalar axis determined by combining digital twins and artificial intelligence: influence of the orientation of this axis for hindfoot compensation of varus and valgus knees.

Philippe Hernigou, Adonis Safar, Jacques Hernigou, Bruno Ferre

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Article in International orthopaedics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

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9citing papers in PubMed, 1 pooled it
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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

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3 · Its place in the literature

Who cites it

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

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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Philippe HernigouOrthopedic Department, Henri Mondor Hospital, University Paris East, Paris, France. philippe.hernigou@wanadoo.fr.ORCID http://orcid.org/0000-0002-8475-279X
Adonis SafarOrthopedic Department, EpiCURA Baudour Hornu Hospital, Mons, Belgium.
Jacques HernigouOrthopedic Department, EpiCURA Baudour Hornu Hospital, Mons, Belgium.
Bruno FerreInstitut Monégasque de Médecine & Chirurgie Sportive, 98000, Monaco, Monaco.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePrevious studies evaluating hindfoot and knee alignment have suggested compensation between the knee and the hindfoot deformities. However, these studies did not investigate the influence of the orientation of the subtalar axis on the results. MATERIAL AND

methodsUsing computed tomography data of patients without osteoarthritis, digital twins, and artificial intelligence, we identified the orientation of the axis of the subtalar joint. Compensation was evaluated in the subtalar joint according to angular knee deformity and subtalar axis direction.

resultsWith the inclination angle defined as the angle between the axis and the XY plane (horizontal) and the deviation angle defined as the angle between the projection of axis on the XZ plane, the inclination angle of the subtalar helical axis showed an average angle of 35.3° (range 5° to 48°). The mean deviation angle for the helical axis was 6.4° (range - 4° to + 12°). Our findings indicated that an increase of the inclination angle of the subtalar axis tends to limit adjustment in the hindfoot alignment toward re-balance of the whole lower limb toward a neutral weight-bearing axis when malalignment of the knee occurs.

conclusionMalalignment of the knee and different compensations in the hindfoot contribute to various combined deformities in the population: associated valgus or varus deformities and inverse associations of varus/valgus deformities.

Indexed as

Artificial IntelligenceSubtalar JointFootHumansKnee JointWeight-BearingDigital twins; Artificial intelligence; Ankle axis; Tibiotalar joint; Subtalar axis; Hindfoot; Hindfoot compensation

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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.