Artikel
Dual mobility cups for recurrent THA dislocation
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Autoren
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Afshin Taheriazam
- Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran, Islamic Republic of
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Farshad Safdari
- Bone, Joint and related tissues research center, Shahid Beheshti University of medical sciences, Tehran, Iran, Islamic Republic of
| Veröffentlicht: | 23. Oktober 2017 |
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Gliederung
Text
Objectives: Instability following total hip arthroplasty (THA) is a serious disabling complication. Even revision THA due to the recurrent dislocation can be associated with persistent instability. Dual mobility implants (tripolar prosthesis) are used to reduce the risk of recurrent hip dislocation. However, there is little knowledge about the mid-term and long-term outcomes of using these implants.
Methods: Between 2005 and 2011, 24 consecutive patients were revised due to recurrent hip dislocation. The patients aged 62.4±10.6 years at the time of surgery. All of the patients had at least 2 episodes of dislocation. Preoperative Harris hip score (HHS) was 46.1±11.5. Patients were followed for 6.2±4.1 years.
Results and Conclusion: At the last visit, HHS improved significantly (83.5±12.6, p<0.001). Redislocation occurred in one patient who required a more revision surgery (4.1%). No patient developed infection and or symptomatic deep venous thrombosis. Also, we found no patient with implant loosening or periprosthetic fracture. Tripolar hip prostheses are useful and effective for treatment of patients with recurrent hip instability after THA. However, more large long-lasting prospective studies are required.
