Evidence map›Paper›PMID 33760941›Full record

ArticleArchives of orthopaedic and trauma surgery2021

The impact of reducing the femoral stem length in total hip arthroplasty during gait.

Anatole Vilhelm Wiik, Adeel Aqil, Bilal Al-Obaidi, Mads Brevadt, Justin Peter Cobb

Open access · hybridAbstract read
In one paragraph

Article in Archives of orthopaedic and trauma surgery, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
1.0field-weighted citation impact, top 24% 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

5 citing papers in PubMed, 8 citations in OpenAlex.

  1. Biomechanical Assessment of Functional Tasks Beyond Level Walking Following Total Hip Arthroplasty: A Scoping Review.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2026
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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

5 authors at 1 institution in 1 country.

Anatole Vilhelm WiikMSK Lab, Imperial College London, Michael Uren Hub, 2nd Floor, White City Campus, Wood Lane, London, W12 0BZ, UK. a.wiik@imperial.ac.uk.ORCID http://orcid.org/0000-0003-0937-7675
Adeel AqilMSK Lab, Imperial College London, Michael Uren Hub, 2nd Floor, White City Campus, Wood Lane, London, W12 0BZ, UK.
Bilal Al-ObaidiMSK Lab, Imperial College London, Michael Uren Hub, 2nd Floor, White City Campus, Wood Lane, London, W12 0BZ, UK.
Mads BrevadtMSK Lab, Imperial College London, Michael Uren Hub, 2nd Floor, White City Campus, Wood Lane, London, W12 0BZ, UK.
Justin Peter CobbMSK Lab, Imperial College London, Michael Uren Hub, 2nd Floor, White City Campus, Wood Lane, London, W12 0BZ, UK.
Imperial College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimThe length of the femoral stem in total hip arthroplasty (THA) is a practical consideration to prevent gait impairment. The aim of this study was to determine if reducing the femoral stem length in THA would lead to impaired gait biomechanics.

methodsPatients uniformly with the same brand implant of differing lengths (100 mm vs 140-166 mm) were taken retrospectively from a prospective trial introducing a new short stem. Twelve patients without any other disorder to alter gait besides contralateral differing length stem THA were tested at differing gradients and speed on a validated instrumented treadmill measuring ground reaction forces. An anthropometrically similar group of healthy controls were analysed to compare.

resultsWith the same posterior surgical approach, the offset and length of both hips were reconstructed within 5 mm of each other with an identical mean head size of 36 mm. The short stem was the last procedure for all the hips with gait analysis occurring at a mean of 31 and 79 months postoperatively for the short and long stem THA, respectively. Gait analysis between limbs of both stem lengths demonstrated no statistical difference during any walking condition. In the 90 gait assessments with three loading variables, the short stem was the favoured side 51% of the time compared 49% for the long stem.

conclusionBy testing a range of practical walking activities, no lower limb loading differences can be observed by reducing the femoral stem length. A shorter stem demonstrates equivalence in preference during gait when compared to a reputable conventional stem in total hip arthroplasty.

Indexed as

Arthroplasty, Replacement, HipHip ProsthesisFemurGaitHip JointHumansProspective StudiesRetrospective StudiesBiomechanicsGaitShort stem total hip arthroplasty

Identifiers

PMID33760941
PMCPMC8497290
OpenAlexW3139060652

What OpenQuestion holds

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Registered trials

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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.