Evidence map›Paper›PMID 30032356›Full record

SynthesisInternational orthopaedics2019

The efficacy of dual-mobility cup in preventing dislocation after total hip arthroplasty: a systematic review and meta-analysis of comparative studies.

Matteo Romagnoli, Alberto Grassi, Giuseppe Gianluca Costa, Lionel E Lazaro, Mirco Lo Presti, Stefano Zaffagnini

Abstract readComparative StudyMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in International orthopaedics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed, 5 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

52 citing papers in PubMed, 5 syntheses or guidelines 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

6 authors.

Matteo RomagnoliII Orthopaedic Clinic and Biomechanics Laboratory, IRCSS Istituto Ortopedico Rizzoli, Via di Barbiano n. 1/10, 40136, Bologna, Italy.
Alberto GrassiII Orthopaedic Clinic and Biomechanics Laboratory, IRCSS Istituto Ortopedico Rizzoli, Via di Barbiano n. 1/10, 40136, Bologna, Italy.
Giuseppe Gianluca CostaII Orthopaedic Clinic and Biomechanics Laboratory, IRCSS Istituto Ortopedico Rizzoli, Via di Barbiano n. 1/10, 40136, Bologna, Italy. gianlucacosta@hotmail.it.
Lionel E LazaroHospital for Special Surgery and New York Presbyterian Hospital, 535 East 70th Street, New York, NY, 10021, USA.
Mirco Lo PrestiII Orthopaedic Clinic and Biomechanics Laboratory, IRCSS Istituto Ortopedico Rizzoli, Via di Barbiano n. 1/10, 40136, Bologna, Italy.
Stefano ZaffagniniII Orthopaedic Clinic and Biomechanics Laboratory, IRCSS Istituto Ortopedico Rizzoli, Via di Barbiano n. 1/10, 40136, Bologna, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeAlthough long-term reports of total hip arthroplasty (THA) showed successful results, instability remains a major complication. Recently, dual-mobility cups (DMC) have gained more and more interest among clinicians, with encouraging results in terms of lower rate of dislocation associated with good clinical results, but a lack of evidence exists regarding the real efficacy of this implant design compared to traditional fixed-bearing total hip arthroplasties.

methodsA systematic search was performed in PubMed, Google scholar, Cochrane Library, and EMBASE by two independent reviewers for comparative studies available till December 2017, with the primary objective to demonstrate a real lower dislocation rate of DMC implants compared to unipolar fixed-bearing cup designs. A meta-analysis was conducted with the collected pooled data about dislocation rate, calculating the risk difference (RD) and relative risk (RR) with 95% CI for dichotomous variables. Heterogeneity was tested using the χ

resultsAfter performing a critical exclusion process, the number of eligible studies included for final synthesis considered was 15, describing the results of a total of 2408 total hip arthroplasties (50.6% with a dual-mobility acetabular cup design, 49.4% with a standard fixed-bearing design). The fixed-effect meta-analysis showed a slight significant risk ratio of 0.16 (95% CI, 0.09, 0.28; I

conclusionsWith the intrinsic limitations of our study design and based on the current available data, this study demonstrates that dual-mobility acetabular components decrease the risk of post-operative instability also in high-risk patients, both in primary and revision hip arthroplasties. However, new high-quality studies, possibly with a randomized control design, should be undertaken in order to strengthen the present data. STUDY

designLevel of Evidence III, therapeutic study.

Indexed as

AcetabulumArthroplasty, Replacement, HipElective Surgical ProceduresHip DislocationHip ProsthesisHumansJoint InstabilityProsthesis DesignProsthesis FailureRange of Motion, ArticularDislocationDual-mobility cupTotal hip arthroplastyTripolar cup

Identifiers

PMID30032356

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.