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. 2012 Mar;36(3):511-8.
doi: 10.1007/s00264-011-1289-4. Epub 2011 Jun 23.

Primary total hip arthroplasty with dual mobility socket to prevent dislocation: a 22-year follow-up of 240 hips

Bertrand Boyer  1 , Rémi Philippot, Jean Geringer, Frédéric Farizon
Affiliations

Primary total hip arthroplasty with dual mobility socket to prevent dislocation: a 22-year follow-up of 240 hips

Bertrand Boyer et al. Int Orthop. 2012 Mar.

Abstract

Purpose: The longest follow-up dual mobility series from inventor Gilles Bousquet focussing on implant survival and the incidence of dislocation.

Methods: This was a retrospective study from 1985 to 1990, on 240 hips using a PF® modular femoral stem and a dual mobility Novae® tripodal socket (SERF).

Results: The 22-year follow-up global survival rate was 74%. No dislocation occurred, 41 hips were revised, including ten retentive failures (RF), 12 hips were lost to follow-up, 87 patients (99 hips) died without revision, and 90 hips were still in situ.

Conclusion: The dual mobility socket global survival rate is comparable to similar series. The 0% dislocation rate demonstrates the success of dual mobility with regard to implant stability. The main issues were cup fixation, which might be improved by the use of macrostructures and HA coating, and osteolytic lesions, caused by polyethylene wear. Traditionally suitable for patients older than 60 years, dual mobility might be extended for use in patients over 50.

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Figures

Fig. 1
Fig. 1
3D and AP radiograph of PF® modular screwed stem (SERF, Décines, France)
Fig. 2
Fig. 2
Outcome of the 373 240 hips at 22 years of follow-up
Fig. 3
Fig. 3
Kaplan-Meier survivorship curve showing the series global survival rate, with 95% confidence intervals (Greenwood algorithm)
Fig. 4
Fig. 4
Kaplan-Meier survivorship curve showing stem revision as the end point, with 95% confidence intervals (Greenwood algorithm)
Fig. 5
Fig. 5
Kaplan-Meier survivorship curve showing cup survival as the end point, with 95% confidence intervals (Greenwood algorithm)
Fig. 6
Fig. 6
Kaplan-Meier survivorship curve showing the onset of retentive failure (RF), with 95% confidence intervals (Greenwood algorithm)
Fig. 7
Fig. 7
Relation between revision rate at 22 years and age at the time of the surgery
See this image and copyright information in PMC

References

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