The effect of a stem on the tibial component of knee arthroplasty. a roentgen stereophotogrammetric study of uncemented tibial components in the Freeman-Samuelson knee arthroplasty

Albrektsson, B.E.; Ryd, L.; Carlsson, L.V.; Freeman, M.A.; Herberts, P.; Regnér, L.; Selvik, G.; Albrektsson, B.E; Ryd, L; Carlsson, L.V; Freeman, M.A; Herberts, P; Regnér, L; Selvik, G

doi:10.1302/0301-620x.72b2.2312565

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The effect of a stem on the tibial component of knee arthroplasty. a roentgen stereophotogrammetric study of uncemented tibial components in the Freeman-Samuelson knee arthroplasty

Albrektsson, B.E.; Ryd, L.; Carlsson, L.V.; Freeman, M.A.; Herberts, P.; Regnér, L.; Selvik, G.

Journal of Bone and Joint Surgery. British Volume 72(2): 252-258

1990

ISSN/ISBN: 0301-620X

PMID: 2312565

DOI: 10.1302/0301-620x.72b2.2312565
Accession: 041616705

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Summary

We studied the effect of a metal tray with an intramedullary stem on the micromotion of the tibial component in total knee arthroplasty. Of 32 uncemented Freeman-Samuelson knee arthroplasties performed in London and Gothenburg, nine had a metal backing and stem added to the tibial component. Micromotion of the tibial components, expressed as migration and inducible displacement, was analysed using roentgen stereophotogrammetric analysis up to two years follow-up. The addition of a metal back and a 110 mm stem to the standard polyethylene component significantly reduced both migration over two years and inducible displacement.