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Ultrasound Imaging of Dual Mobility Cup

NCT05177224 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 15

Last updated 2022-01-04

No results posted yet for this study

Summary

The concept of dual mobility cup (DMC), developed in the 1970s by Gilles Bousquet, allows a greater motion and a better stability of the implants, reducing the prosthetic dislocations frequency in at-risk populations. This type of prosthesis has a small-diameter head that ensures a low wear rate and a large-diameter head, with a polyethylene liner, to increase prosthetic stability. This prosthesis has survival rates comparable to those found with conventional prostheses. However, actually, its in vivo behaviour has not yet been established, leading orthopaedic surgeons to keep this concept for patients with a high risk of dislocation (elderly subjects, neurological pathologies, spinal pathologies, falls, etc.). To date, no in vivo studies have been carried out - non-invasively and dynamically - to understand the biomechanical behaviour and the stability properties of the dual mobility cup implanted in patients.

The objective of this study is to visualize and quantify the in vivo movement of the polyethylene liner using 3D ultrasound imaging. The second objective is to obtain in vivo data (using the motion analysis system and the force platform) allowing the use of a musculoskeletal model to improve the understanding of the prosthetic dislocation phenomenon.

Participants will carry out daily life activities (walk, chair up, etc.). During this study, liner ultrasound acquisitions and motion analysis of the lower limb will be performed, thanks to a movement analysis system composed of cameras coupled to a force platform.

Hip kinematics will be obtained from the motion analysis data and will be based on the model of Leardini et al. 2007. The position of the liner and liner plane will be determined using 3D ultrasound data. The abduction and anteversion motion of the liner plane will be measured relative to the pelvic landmark.

Conditions

  • Dual Mobility Cups

Interventions

OTHER

Ultrasound acquisitions to define liner position during movements

Ultrasound acquisition of the dual mobility cup will be performed before and after movement. Acquisitions will be performed on the groin area. Movement will be performed 3 times and are: * Walking * Knee-bending * Standing up * Stair climbing Movement acquisition of the lower limb will be performed using reflective markers placed on the skin. The movements will be recorded using motion capture system (infrared cameras). The load applied by the patients on the ground when doing these movements will be recorded with a force plate.

Sponsors & Collaborators

  • Hospices Civils de Lyon

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
50 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2022-01-31
Primary Completion
2023-01-31
Completion
2023-01-31

Countries

  • France

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05177224 on ClinicalTrials.gov