Hip arthrodesis conversion to dual mobility total hip arthroplasty in a young adult using a custom-made highly-porous titanium monobloc cup: A case report.

ABSTRACT

INTRODUCTION: Conversion of hip arthrodesis to total hip arthroplasty (THA) is an effective but challenging procedure to restore hip functionality and improve quality of life. Herein, a case of arthrodesis takedown to a dual mobility THA with a custom-made 3D-printed cup. PRESENTATION OF CASE Due to higher risk of instability and loosening for the altered and atrophic anatomy, a custom-made highly-porous titanium dual mobility monobloc cup has been used for a cementless conversion THA in 31-year-old patient with hip arthrodesis. At 3-year follow-up clinical and radiographic results were excellent with the custom-made implant found stable and well osseointegrated. DISCUSSION: To the best of our knowledge, this is the first case of arthrodesis conversion to THA with custom-made highly-porous dual mobility cup in a young adult. The dual mobility construct helped reducing the risk of dislocation, while the highly-porous structure reduced the risk of aseptic loosening. CONCLUSION: The use of cementless highly-porous dual mobility implant in complex cases young patients is supported.