New hip cup design could reduce dislocation risk after replacement

NCT ID NCT07464665

Disease control Sponsor: Elsan Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jul 17, 2026 · Updated 2 times

Summary

This study compares two types of hip replacement cups: standard unipolar cups and dual-mobility cups, which have an extra moving part to lower dislocation risk. Researchers will enroll 300 adults getting a first-time hip replacement through a front-of-hip approach. The main goal is to see if patients feel more natural and forget about their new hip two years after surgery, measured by a special questionnaire.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance: dual-mobility cup and unipolar cup (hip replacement implants)
What this could lead to: If successful, this trial could show that dual-mobility cups are as good as or better than standard cups for hip replacement, potentially reducing dislocation risk and improving patient satisfaction.
What could go wrong: This is a single-center trial with 300 participants, so results may not apply to all patients. Dual-mobility cups have rare risks like intra-prosthetic dislocation or wear, though newer designs have reduced these concerns.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 300 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Jul 2030

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * men and women aged ≥18 years old * set to undergo elective primary THA via direct anterior approach (DAA) * affiliated with a social security scheme * able to answer questionnaires and to communicate freely in French * who have been informed and have provided free, informed, and written consent (no later than the day of inclusion and before any examination required by the study) Exclusion Criteria: * with prior ipsilateral hip surgery * with prior contralateral hip surgery * that require acetabular cup diameters ≤50mm (because DM cups are not available from the same manufacturer for diameters ≤50mm, and UP cups require head diameters of 36mm and thus minimum cup diameters of 52mm) * undergoing emergency or trauma surgery (e.g. femoral neck fractures) * with any concomitant disease or disorder which, in the opinion of the surgeon, may put the patient at risk, notably of hip instability or dislocation (hip dysplasia, neuromuscular deficit, fracture sequelae…) or may influence the result of the study * that are pregnant or breastfeeding * under legal protection (guardianship or curatorship or deprived of liberty).

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Primary total hip arthroplasty Primary total hip replacement

How to take part

Only the study team decides who joins. These are the ways to reach them.

The places running it

1 site. The list below names each one and where it is.
The official record

ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

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A doctor treating you

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New hip cup design could reduce dislocation risk after replacement

What the study statuses mean