Evidence map›Paper›PMID 33596116›Full record

Trial reportHip international : the journal of clinical and experimental research on hip pathology and therapy2022

Migration behaviour of 2 clinically excellent cementless stems with different design rationales: 5-year follow-up of a randomised RSA-study.

Paul van der Voort, Danny van Delft, Edward R Valstar, Bart L Kaptein, Marta Fiocco, Rob Ghh Nelissen

Abstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Hip international : the journal of clinical and experimental research on hip pathology and therapy, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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

1 citing paper in PubMed.

  1. Trial
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

6 authors.

Paul van der VoortDepartment of Orthopaedics, Biomechanics and Imaging Group, Leiden University Medical Center, Leiden, The Netherlands.ORCID 0000-0003-1651-1182
Danny van DelftDepartment of Orthopaedics, Biomechanics and Imaging Group, Leiden University Medical Center, Leiden, The Netherlands.
Edward R ValstarDepartment of Orthopaedics, Biomechanics and Imaging Group, Leiden University Medical Center, Leiden, The Netherlands.
Bart L KapteinDepartment of Orthopaedics, Biomechanics and Imaging Group, Leiden University Medical Center, Leiden, The Netherlands.
Marta FioccoDepartment of Medical Statistics and Bioinformatics, Leiden University Medical Center, Leiden, The Netherlands.
Rob Ghh NelissenDepartment of Orthopaedics, Biomechanics and Imaging Group, Leiden University Medical Center, Leiden, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionExcellent long-term survival has been reported for both the Taperloc and the Mallory-Head cementless stems. However, little is known about the migration behaviour of these stems which have different design rationales. The purpose of this randomised clinical trial was to compare the migration and clinical outcomes of these stems during 5 years of follow-up.

methods42 consecutive hips in 38 patients scheduled to receive cementless THA were randomised to either a Taperloc or a Mallory-Head stem. Evaluation took place preoperatively and postoperatively on the second day, at 6, 12, 26, and 52 weeks, and annually thereafter. Primary outcome was stem migration measured using roentgen stereophotogrammetric analysis (RSA) and secondary outcomes were the Harris Hip Score (HHS) and 36-Item Short-Form Health Survey (SF-36). No patients were lost to follow-up; in 1 patient the THA was removed due to deep infection 3 months postoperatively. In 6 hips migration measurements were not possible due to insufficient marker configuration.

resultsThroughout the follow-up period of 5 years, 3-dimensional migration was comparable between the Taperloc and the Mallory-Head stems (

conclusionsThe excellent long-term survival of both designs was confirmed in this study showing comparable initial migration with subsequent stabilisation. However, the Taperloc design with a flat, wedged geometry showed better rotational stability.

Indexed as

Arthroplasty, Replacement, HipHip ProsthesisFollow-Up StudiesHumansProsthesis DesignProsthesis FailureRadiostereometric AnalysisTreatment OutcomeRandomised clinical trialRoentgen stereophotogrammetric analysistotal hip arthroplasty

Identifiers

PMID33596116
PMCPMC9726743

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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.