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ORIGINAL ARTICLE
Year : 2019  |  Volume : 54  |  Issue : 2  |  Page : 168-173

The use of cemented dual mobility acetabular cup in revision hip arthroplasty


Department of Orthopedic Surgery, Ain Shams University, Cairo, Egypt

Correspondence Address:
MD Ayman Fathy
Department of Orthopedic Surgery, Ain Shams University Hospitals, 2 Saad Abdelwares Street, New Nozha, Cairo, 11769
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/eoj.eoj_45_19

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Purpose Instability is always an important problem after both primary and revision total hip arthroplasty (rTHA). Dual mobility or tripolar unconstrained acetabular components give a solution for preventing and treating instability. Results of many studies using dual mobility cups (DMC) with mid-term to long-term follow-up support their effectiveness. Complications such as intraprosthetic dislocation (IPD) and accelerated wear have been studied, although they seem to be less significant in older, low-demand patients. However, their use in younger patients should be with caution owing to the lack of current data concerning this high-demand patient population. The aim of this study is to analyze the short-term results of cemented DMCs in rTHA. Specifically, we evaluated the following: clinical outcomes and scoring, dislocation, IPD rates, and other complications. Patients and methods The results of a single design of DMC was prospectively evaluated in a continuous series of 20 rTHAs. Follow-up period was of at least 2 years. Mean age of the patients was 66.8 years old. Results At the 2-year mean follow-up, the dislocation rate was 5%, and the IPD rate was 0%. Improvement of the hip score, function, pain, and range of motion was noticed. Conclusion DMCs demonstrated a low dislocation rate in rTHA but did not solve problems related to perioperative technical errors. Moreover, IPD did not appear to be a concern when compared with the gain of preventing instability.


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