International orthopaedics · 2026
Monoblock dual-mobility cups in total hip arthroplasty for low-grade hip dysplasia: a retrospective series with a mean ten years follow-up.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Tramini Michel, Vermorel Pierre-Henri, Stordeur Alban, Lustig Sebastien, Farizon Frederic, Philippot Remi
Аннотация
INTRODUCTION: Total hip arthroplasty (THA) for hip developmental dysplasia (DDH) carries a high perioperative complication rate, with dislocation representing the most frequent adverse event. Monoblock dual-mobility (DMM) cups have demonstrated promising results in reducing prosthetic instability while ensuring long-term implant survival. However, data specifically addressing DMM THA in low-grade DDH remain scarce. The aim of this study was to evaluate clinical outcomes and complication rates at a minimum ten-year follow-up in patients undergoing DMM THA for low-grade DDH.
MATERIALS AND METHODS: A single-centre retrospective study was conducted, including all patients who underwent DMM THA for Crowe grade I or II DDH between 2008 and 2018. Clinical outcomes including the Harris Hip Score (HHS), Postel-Merle d'Aubigné (PMA) score, Devane score, visual analog scale (VAS), and range of motion (ROM) were assessed preoperatively, at one year, and at final follow-up. Implant survival was estimated using Kaplan-Meier analysis.
RESULTS: Thirty-one THAs were performed in 25 patients (mean age 55.1 ± 13.4 years; mean follow-up 10.06 ± 1,98 years). All functional scores improved significantly at final follow-up (HHS 48 to 98, PMA 11 to 17, Devane 3 to 4, all p < 0.001). No dislocation, loosening, periprosthetic fracture, or septic complication was recorded. Implant survival was 100% at ten years.
CONCLUSION: The DMM THA for low-grade DDH provides excellent long-term functional outcomes with a remarkably low complication profile, supporting the routine use of DMM cups in this indication.
MATERIALS AND METHODS: A single-centre retrospective study was conducted, including all patients who underwent DMM THA for Crowe grade I or II DDH between 2008 and 2018. Clinical outcomes including the Harris Hip Score (HHS), Postel-Merle d'Aubigné (PMA) score, Devane score, visual analog scale (VAS), and range of motion (ROM) were assessed preoperatively, at one year, and at final follow-up. Implant survival was estimated using Kaplan-Meier analysis.
RESULTS: Thirty-one THAs were performed in 25 patients (mean age 55.1 ± 13.4 years; mean follow-up 10.06 ± 1,98 years). All functional scores improved significantly at final follow-up (HHS 48 to 98, PMA 11 to 17, Devane 3 to 4, all p < 0.001). No dislocation, loosening, periprosthetic fracture, or septic complication was recorded. Implant survival was 100% at ten years.
CONCLUSION: The DMM THA for low-grade DDH provides excellent long-term functional outcomes with a remarkably low complication profile, supporting the routine use of DMM cups in this indication.