Clinical trials

Hip fractures in especially older adults cause severe clinical and functional impacts. Despite improved surgical care, one year mortality remains 14-30%, and fewer than half of the survivors regain their pre-fracture functional status. After a hip fracture, patients are primarily concerned with what they will be able to do in daily life. Wihout accurate predictions of mobility and Activities of Daily Life (ADL) independence, it is difficult to set realistic expectations and make appropriate decisions regarding treatment and rehabilitation. While there have been advancements in developing predictive models for mortality following hip fractures, there is a notable gap in models focused on predicting functional recovery. This study aims to develop and validate a machine learning-based model that can predict mobility and ADL independence three months after obtaining a hip fracture.

After undergoing total hip or total knee arthroplasty, current guidelines recommend routine follow-up with an X-ray within 3 months and again at 1 year. Follow-up at 5 years (for hip arthroplasties) or every 5 years (for knee arthroplasties) is also considered worthwhile according to the guideline. However, these follow-up appointments require considerable time from patients, caregivers, and healthcare professionals, and it is unclear whether they are truly beneficial. It is possible that a single follow-up within 3 months is sufficient. This could potentially prevent over 100,000 unnecessary hospital visits per year, resulting in significant cost savings. If patients or healthcare providers have concerns, they can always request an additional follow-up. The HAKA trial consists of three different work packages (WPs). This trial (WP1) investigates the 1-year follow-up, WP2 examines the 10-year follow-up, and WP3 is a qualitative study exploring the experiences and perceptions of patients and healthcare professionals. The aim of the HAKA trial is to safely reduce routine follow-up appointments after total hip or knee arthroplasty and to revise current clinical guidelines accordingly.

This 10-year follow-up study aims to further investigate long-term migration patterns of the uncemented Delta-TT cup and H-MAX S stem, comparing outcomes between ceramic and polyethylene liners. Given the predictive value of early RSA migration patterns at the 2-year mark for identifying implants at risk of aseptic loosening, we hypothesize that the Delta-TT cup will demonstrate good stability at the 10-year postoperative mark. Besides, it is hypothesized that migration of Delta TT-cups is comparable between ceramic and polyethylene liners. The primary objective of this study is to measure the long-term stability of the Delta TT cup, combined with either a ceramic or cross-linked polyethylene liner, by means of RSA at 10-years postoperatively. Secondary objectives are to measure long-term stability of the H-MAX S stem, by means of RSA at 10-year postoperatively. Furthermore the study aims to measure implant survival rates and patient-reported outcomes for both the Delta-TT cup and H-MAX S stem, comparing outcomes between the ceramic and polyethylene group.

Objective: The main objective of this study is to compare the (early) migration of the cemented BiMobile cup at two year post-surgery between two different cup sizes after standard optimal reaming, and consequently adjusting the cement mantle into circa 2 or 4 mm, in patients with a primary cemented total hip arthroplasty (THA). Additionally, the results of the BiMobile cup will be compared to the Avantage cup, which is placed with a standard cup size, resulting in a cement mantle of approximately 2 mm. Study design: A prospective single centre blinded randomised controlled trial. Study population: All patients who meet the criteria to undergo a cemented THA.

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.