The dislocating hip replacement - revision with a dual mobility cup in 56 consecutive patients
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Thomas Jakobsen1, Andreas Kappel2, Flemming Hansen3
1Department of Orthopaedics, Regional Hospital of Viborg, Denmark.
Insights
Dual mobility cups effectively treat recurrent hip replacement dislocations, with a low re-dislocation rate. This study supports their use, though longer follow-up is needed for implant survival data.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Recurrent hip replacement dislocations present a significant clinical challenge.
- Dual mobility cups offer a potential solution for managing these challenging cases.
Purpose of the Study:
- To retrospectively evaluate the efficacy of dual mobility cups in treating recurrent hip dislocations.
- To assess the outcomes of revision surgery using dual mobility cups in a consecutive patient series.
Main Methods:
- A series of 56 patients undergoing revision surgery for recurrent hip dislocations between November 2000 and December 2010.
- All revisions utilized the Saturne dual mobility cup.
- Mean follow-up was 44 months.
Main Results:
- Only 1.8% of patients experienced re-dislocation post-revision.
- Overall revision rate was 5.3% due to component loosening, infection, or disintegration.
- Harris Hip Score improved significantly from 76 to 87 within one year post-revision.
Conclusions:
- Dual mobility cups are a viable treatment option for recurrent hip dislocations.
- Further long-term studies are necessary to fully ascertain implant survival rates.
Introduction:
Recurrent dislocations of hip replacements are a difficult challenge. One treatment option for recurrent dislocations is the use of a dual mobility cup. The aim of this study was to retrospective investigate the effect of dual mobility cups as a treatment for recurrent dislocations in a consecutive series. Materials and.
Methods:
56 consecutive patients were revised in the period November 2000 to December 2010. The mean age at revision was 72 years (SD 11, range 37-92)) and median number of dislocations before revision surgery were 4 (IQR, 2-11). In all cases, revision was made with a Saturne dual mobility cup (Amplitude, Neyron, France). The mean follow-up period was 44 months (SD 30, range 0.1-119).
Results:
One patient (1.8%) experienced a re-dislocation. Three patients (5.3%) had to be revised. One due to disintegration between the femoral head and inner shell, one due to loosening of the acetabular component, and one due to infection. Harris Hip Score improved from a mean of 76 before index surgery to 87 within one year after index surgery.
Conclusion:
This study advocates the use of a dual mobility cup for treatment of recurrent dislocations of THR. However, studies with a longer follow up are needed in order to evaluate implant survival.
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