Two-Year Outcomes of Novel Dual-Mobility System in Revision Total Hip Arthroplasty
Journal Title: Journal of Orthopaedic Science and Research - Year 6, Vol 1, Issue 2025
Abstract
Background: Revision Total Hip Arthroplasty (rTHA) is projected to increase substantially in volume. Dual-Mobility (DM) implants, composed of articulating surface between femoral head and liner, have gained popularity for their potential to reduce hip instability and dislocations due to the larger DM femoral head options. This study aimed to evaluate early outcomes and survivorship of a novel DM implant for rTHA. Methods: This was a retrospective, multicenter study to assess clinical outcomes of 199 patients undergoing rTHA with a novel DM implant from April 2018 to July 2023. Patient demographics, clinical outcomes and implant survivorship were collected and analyzed. Primary outcomes included 90-day Emergency Department (ED) visits and readmissions, reoperations, revisions and overall implant survivability. Preoperative and postoperative Hip Disability and Osteoarthritis Score for Joint Replacement (HOOS, JR) were also analyzed. Results: 108 patients achieved minimum 1-year of clinical follow-up and 50 patients achieved minimum 2-years of clinical follow-up. Patients who received the novel DM implant were a mean of 67.3 years old, with the majority of the patients being women (58.0%) and of white race (68.0%). Mean BMI of patients was 29.5. Five patients (2.51%) had 90-day ED visits and readmissions due to dislocation (n = 3, 1.5%) and infection (n = 2, 1%). Two patients (1%) had revision of the acetabular component due to instability and one (0.5%) underwent close reduction a the dislocated rTHA. Patients experienced significant improvements in mean HOOS, JR scores at all postoperative time points, surpassing the minimally clinically important difference for HOOS, JR (18.0). Conclusion This novel DM acetabular implant demonstrated excellent survivorship of the acetabular component up to 4 years (99% [95% confidence interval (CI) 0.978 – 0.995], for both) of follow-up in complex rTHA cases, with low rates of instability and no reported episode of metallosis. Patients demonstrated clinically significant improvements in HOOS, JR at 2-years post-op.
Authors and Affiliations
Michelle A Richardson1, Muhammad A Haider1, Farouk Khury1,2, Nihir Parikh3, Paul Maxwell Courtney3, Chad Krueger3, Ran Schwarzkopf1*
Keywords
Related Articles
- EP ID EP760088
- DOI https://doi.org/10.46889/JOSR.2025.6107
- Views 39
- Downloads 0
Treating Patellar Instability After Total Knee Arthroplasty with Medial Retinaculum Reconstruction: A Clinical Case and Narrative Review
Background: Patellar instability after a total knee arthroplasty is a disabling complication that often needs surgical revision, prolonging hospital in-stay and rehabilitation. Different surgical techniques exist in lite...
A Retrospective Evaluation of Biologic Tuberoplasty with Medialization Technique for Massive Rotator Cuff Tears Using Acellular Dermal Matrix
Background: Massive Irreparable Rotator Cuff Tears (MIRCTs) remain one of the most challenging conditions in shoulder surgery. While partial repair with medialization may reduce tension and biologic tuberoplasty with Ace...
Modified Stoppa Approach for Acetabular Fixation
Introduction: When acetabular fractures are intra-articular, correct anatomic reduction is important to achieve an excellent functional outcome. A few of the surgical techniques like ilioinguinal and modified Stoppa tech...
Impact of Elderly Women's Knee Osteoarthritis Pain on Daily Living Activity at Northern Upper Egypt
Background: The most common cause of discomfort in old age is osteoarthritis. The age range between 55 and 64 years old has the largest annual incidence of knee osteoarthritis. 65 and younger make up more than half of th...
Four-Dimensional CT Assessment of the Transverse Carpal Ligament Attachments-A Pilot Study
Introduction: The wrist is a complex joint, and static imaging techniques may not capture subtle kinematic abnormalities. Four-dimensional (4D) CT presents an alternative method of assessing the dynamic movement of the T...