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

Abstract

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.Résumé 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.

Outcomes of delayed total hip arthroplasty in patients with a previous ipsilateral acetabular fracture

“…However, with surgical technique and implant design advancements, improved outcomes with modern cementless acetabular components have been reported [23]. Some have reported acetabular component revision rates comparable to THA performed for primary osteoarthritis [24][25][26][27]. Impaction grafting used cemented all-polyethylene cups has also shown promising results in restoring acetabular bony defects [28][29][30].…”