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The influence of cement viscosity on the early migration of a tapered polished femoral stem

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Abstract

It is unclear whether it is best to use high-viscosity or low-viscosity cement for fixation of total hip replacement (THR) femoral components. This study examines the influence of cement viscosity on the migration of the Exeter femoral component using roentgen stereophotogrammetric analysis (RSA). Simplex, CMW1 and CMW3 G cements were examined in a total of 46 patients over a 12-month period. The overall pattern of migration for all cohorts was one of subsidence and rotation into valgus. There was no significant difference in any aspect of migration between the groups. In vitro studies demonstrate that low-viscosity cement forms a more stable bone-cement interface. Several groups have examined the in vivo effect of cement viscosity on stem longevity with conflicting results. For a polished, tapered implant that is designed to subside, cement viscosity does not influence the 1-year migration, and it is therefore unlikely to affect long-term outcome.

Résumé

Il n'est pas précisé actuellement s'il est meilleur ou non d'utiliser un ciment de basse ou haute viscosité pour la fixation des composants fémoraux des PTH. Cette étude examine l'influence de la viscosité du ciment sur la migration du composant fémoral de type Exeter, en utilisant le système RSA . Les ciments Simplex, CMW1 et CMW3 G ont été examinés dans un total de 46 malades sur une période du 12 mois. Le modèle de migration pour toutes les cohortes était une descente et rotation en valgus. Il n'y avait aucune différence notable dans l' aspect de migration entre les groupes. Les études in vitro démontrent que le ciment de à basse viscosité forme une interface os—ciment plus stable. Plusieurs groupes ont examiné l'effet in vivo de la viscosité du ciment sur la longévité de la tige, avec des résultats discordants. Pour un implant conique poli qui est conçu pour descendre, la viscosité du ciment n'influence pas la migration dans la première année et c'est peu probable que le résultat à long terme soit influencé.

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Authors and Affiliations

  1. Oxford Orthopaedic Engineering Centre, Nuffield Orthopaedic Centre, Windmill Road, Headington, Oxford, OX3 7LD, UK

    S. Glyn-Jones, J. Hicks, J. Alfaro-Adrian, H. S. Gill, P. McLardy-Smith & D. W. Murray

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  1. S. Glyn-Jones
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  2. J. Hicks
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  3. J. Alfaro-Adrian
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  4. H. S. Gill
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  5. P. McLardy-Smith
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  6. D. W. Murray
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Correspondence to H. S. Gill.

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Glyn-Jones, S., Hicks, J., Alfaro-Adrian, J. et al. The influence of cement viscosity on the early migration of a tapered polished femoral stem. International Orthopaedics (SICOT) 27, 362–365 (2003). https://doi.org/10.1007/s00264-003-0500-7

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  • DOI: https://doi.org/10.1007/s00264-003-0500-7

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