A common complication post hip replacement is hip dislocation or hip instability which can lead to the hip implants being revised. A new generation of Dual Mobility hips was designed to minimize hip dislocation/hip instability and polyethylene wear thus increasing the longevity of the hip prosthesis and reducing the number of re-operations for a patient. In this study we will be assessing 2 dual mobility hips manufactured by Stryker Orthopaedics Inc. The ADM and the MDM.
Hip replacement is a procedure in which the hip joint is replaced by a prosthetic implant or prosthesis. Post op hip dislocation or hip instability is a common complication which can lead to the hip implants being revised. There are many types of hip prostheses manufactured with the aim of prolonging longevity of the prosthesis and minimizing postoperative complications. One of these is a new generation of dual mobility hip manufactured by Stryker Orthopaedics. The Anatomic Dual Mobility (ADM) and the Modular Dual Mobility (MDM) were designed to minimize hip dislocation/hip instability and polyethylene wear thus increasing the longevity of the hip prosthesis and reducing the number of re-operations for a patient. In this study we will be assessing the outcome of the ADM and MDM hip system.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
120
Dual Mobility Hip prosthesis manufactured by Stryker Orthopaedics: ADM/MDM
Unity Health Toronto, St. Michael's Hospital
Toronto, Ontario, Canada
To assess the change in polyethylene wear of Dual Mobility hip implants using Stryker Orthopaedics ADM & MDM prostheses
This study will assess the change in linear and volumetric wear using 3D x-ray analysis. Measurements will be taken of x-rays obtained before the patient's discharge home, 6 weeks postop, and the most recent x-ray taken more than 3 years postop.
Time frame: before the patient's discharge home, 6 weeks postop, and the most recent x-ray taken up to 5 years postop.
To review the number of postop hip dislocations/hip instabilities
Dislocations and the post op time for each occurrence per patient will be collected in tabular format. This in turn will be used to calculate percent of cases/subject.
Time frame: first 5 years post surgery
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