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. 2009 Aug;33(4):933-7.
doi: 10.1007/s00264-008-0592-1. Epub 2008 Jun 13.

The Bimetric cementless total hip replacement: 7-18 year follow-up assessing the influence of acetabular design on survivorship

R C Russell  1 , A Ghassemi, J H Dorrell, D P Powles
Affiliations

The Bimetric cementless total hip replacement: 7-18 year follow-up assessing the influence of acetabular design on survivorship

R C Russell et al. Int Orthop. 2009 Aug.

Abstract
in English, French

The purpose of this study was to evaluate the mid- to long-term survivorship of Bimetric cementless total hip replacement and assess how it is affected by the acetabular design. This was a retrospective analysis of 127 Bimetric cementless total hip replacements in 110 patients with a follow-up of 7-18 years. A single design stem and three different cementless metal-backed acetabular designs were used. Patients were assessed clinically using the Harris hip score and radiologically by independent review of current hip radiographs. There was only one case of aseptic loosening of the femoral stem. The earliest acetabular design showed a high failure rate whilst the latter two designs showed a 96% survivorship at a mean of 9.5 years. We conclude that a combination of the bimetric stem with either of the latter acetabular cup designs has a good mid- to long-term performance.

l’étude de l’évaluation à moyen ou à long terme de la survie d’une prothèse sans cimentde type Bimétric. il s’agit d’une étude prospective de 127 prothèses totales de hanche chez110 patients avec un suivi moyen de 7 à 18 ans. Un seul dessin de tige fémorale et troisdessins différents de cupule métal back sans ciment ont été utilisés. Les patients ont étéévalués sur le plan clinique (score de Harris) et sur le plan radiologique. Un seul cas de descellement aseptique de tige fémorale a été retrouvé. Sur les troismodèles de cupule, le premier modèle montre un taux d’échec très important alors que les deuxderniers modèles ont un taux de survie de 96% à 9,5 ans de recul. En conclusion, nous pouvons affirmer que la combinaison d’une tige de type bimétric associéeaux modèles acétabulaires les plus tardifs ont permis un bon résultat moyen à long terme.

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Figures

Fig. 1
Fig. 1
The bimetric femoral stem
Fig. 2
Fig. 2
Cup A
Fig. 3
Fig. 3
Cup B
Fig. 4
Fig. 4
Cup C
Fig. 5
Fig. 5
Survivorship of the bimetric uncemented total hip replacement
Fig. 6
Fig. 6
Survivorship of cups A, B, and C acetabular components
Fig. 7
Fig. 7
Survivorship of the uncemented bimetric femoral stem
See this image and copyright information in PMC

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