Outcome of dual mobility Acetabular cup for instability in total hip Arthroplasty

El Ashhab, Mohamed Gamal El Din; Mandour, Fahim Ali; El Attar, Hesham Ali

doi:10.21608/bmfj.2024.288374.2077

Outcome of dual mobility Acetabular cup for instability in total hip Arthroplasty

Articles in Press

Document Type : Original Article

Authors

¹ Professor of Orthopedic Surgery, Faculty of Medicine, Benha University

² (M.B.B.Ch, Faculty of Medicine, Benha University) Department of Orthopedic Surgery, Faculty of Medicine, Benha University

³ Lecturer of orthopaedic surgery-Faculty of Medicine- Benha University

10.21608/bmfj.2024.288374.2077

Abstract

Background: Dislocation after revision total hip arthroplasty (THA) continues to be one of the most common and concerning complications after the procedure. Dual-mobility (DM) acetabular components decrease the risk of post-operative instability also in high-risk patient, both in primary and revision hip arthroplasty. This study aimed to evaluate the outcome of DM acetabular cup (DMC) for instability in THA. Methods: This prospective study included 20 patients with Hip abductor insufficiency underwent total hip replacement using dual mobility cup. Complete local examination of the involved hip joint and radiological evaluation to ensure precise templating The Harris hip score (HHS) is used for clinical evaluation of patients at 6 weeks, 3months, 6 months, and the last follow-up. Standard radiographs are taken for all patients at subsequent follow-up examinations to examine component position or migration, osteolysis and loosening, and union of transfemoral osteotomy if used. Results: Regarding the prothesis, Cementless cup- Cementless stem was used in 3 (15.0%) patients, Cemented cup- Cementless stem was used in 9 (45.0%) patients and Cemented cup- Cemented stem was used in 8 (40.0%) patients. Harris hip score is improved over time postoperatively. HHS was significantly higher after 6 wks., after 6 months and after 1 years compared to preoperative HHS. Conclusion: the use of DMC has been found to be an effective technique for preventing hip arthroplasty instability. The clinical outcomes achieved with DMC were quite satisfactory, and the incidence of complications was significantly lower compared to other techniques.

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