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. 2009 Aug;33(4):927-32.
doi: 10.1007/s00264-008-0589-9. Epub 2008 Jun 3.

The use of a dual-articulation acetabular cup system to prevent dislocation after primary total hip arthroplasty: analysis of 384 cases at a mean follow-up of 15 years

Affiliations

The use of a dual-articulation acetabular cup system to prevent dislocation after primary total hip arthroplasty: analysis of 384 cases at a mean follow-up of 15 years

Remi Philippot et al. Int Orthop. 2009 Aug.

Abstract

The concept of a dual articulation acetabular cup was developed by Prof. Bousquet in 1974. This concept has been shown to provide high stability after revision and primary total hip arthroplasty. The aim of our study was to evaluate the incidence of prosthetic instability in a consecutive homogeneous series of 384 primary dual mobility cups. Incidence of instability and implant survival were evaluated. Mean follow-up was 15.3 years (range, 12-20). There was no early or late instability. On the acetabular side there were 13 aseptic loosenings, 14 intraprosthetic dislocations, and seven polyethylene wear cases that required replacement of the liner. The cumulative survival rate of the dual-articulation acetabular cup using surgical revision for aseptic loosening as the endpoint was 95.9% +/- 4.1% at 18 years postoperatively. Our series proves the good long term behaviour of dual-articulation acetabular components in primary arthroplasty. Their excellent survivorship rate and the absence of episodes of prosthetic instability increase our confidence in this concept.

Le concept de cupule à double mobilité a été inventé par le Professeur Gilles BOUSQUET en 1974. Ce concept a permis de mettre en évidence une importante stabilité des hanches, notamment après révision mais également dans les prothèses totales de hanches de première intention. Le but de cette étude est d’évaluer l’incidence et l’instabilité sur une série homogène consécutive de 384 hanches traitées avec cupule à double mobilité. Le taux d’instabilité des implants sur les patients survivants a été évalué. Le suivi moyen a été de 15,3 ans (de 12 à 20 ans) au plus long recul, il n’y a aucune instabilité ni primaire, ni tardive. Par contre, il existe 13 descellements aseptiques acétabulaires, 14 luxations intra prothétiques, 7 usures du polyéthylène qui ont nécessité un remplacement du PE. Le taux de survie cumulé de cette cupule à double mobilité est de 95,9% ± à 18 ans si l’on prend comme critère la révision pour descellement aseptique. Cette série prouve le bon devenir à long terme de cette articulation dans les prothèses totales primaires, avec un excellent taux de survie et l’absence de phénomènes de luxation inhérentes à ce concept.

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Figures

Fig. 1
Fig. 1
Double mobility acetabular cup system
Fig. 2
Fig. 2
Antero–posterior radiograph of pelvis 15 years postoperative
Fig. 3
Fig. 3
Aspect of the acetabular cup system after intraprosthetic dislocation. In this case the intraprosthetic dislocation is associated with loosening of the acetabular component
Fig. 4
Fig. 4
Radiograph of an intraprosthetic dislocation due to fibrosis at six-year follow-up
Fig. 5
Fig. 5
Cumulative survival rate of dual-articulation acetabular cup using surgical revision for aseptic loosening as the end point

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