Unipolar cup: Cemented unipolar acetabulum cup for primary THA
Dual mobility cup: Cemented dual mobility acetabulum cup for primary THA
Study summary
Objective: The primary objective is to investigate whether there is a difference in the number of hip dislocations following primary total hip arthroplasty (THA), using the posterolateral approach, with a DM cup compared to a unipolar cup in elderly patients 1 year after surgery.
Study design: Prospective multi-center nation wide, single blinded RCT nested in the LROI.
Study population: Patients ≥ 70 years old, undergoing an elective primary cemented THA.
Eligibility
Sex
ALL
Min age
70 Years
Max age
—
Healthy volunteers
No
Inclusion Criteria:
* Patients who are eligible for elective primary THA with a cemented cup, with a 32mm or 36 mm liner, for any indication.
* THA using posterolateral surgical approach.
* Patients ≥ 70 years old
* Adequate comprehension of written and spoken Dutch
Exclusion Criteria
* Patients unable to complete PROMs
* Patients with dementia, epilepsy\*, spasticity\*, mental retardation or alcoholism. (If dementia or mental retardation is not already mentioned in the medical chart, this can be determined by doctors opinion.)
* Patients not eligible for either a unipolar or a DM cup
* These patients will be asked to participate in the non-randomized dual mobility observational cohort.
Primary outcome measure(s)
Number of dislocations — 1 year postoperative The total number of dislocations, regardless of type of treatment (i.e. closed repositioning or revision).
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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