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Trabecular metal tibia still stable at 5 years: an RSA study of 36 patients aged less than 60 years
Department of Orthopaedics and Center for Clinical Research, Falu General Hospital , Falun.
Department of Orthopaedics and Center for Clinical Research, Falu General Hospital , Falun.
Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Orthopaedics.ORCID iD: 0000-0002-8818-3408
2013 (English)In: Acta Orthopaedica, ISSN 1745-3674, E-ISSN 1745-3682, Vol. 84, no 4, 398-405 p.Article in journal (Refereed) Published
Abstract [en]

Background and purpose Clinical results of total knee replacement (TKR) are inferior in younger patients, mainly due to aseptic loosening. Coating of components with trabecular metal (TM) is a new way of enhancing fixation to bone. We have previously reported stabilization of TM tibial components at 2 years. We now report the 5-year follow-up of these patients, including RSA of their TM tibial components. Patients and methods 22 patients (26 knees) received an uncemented TM cruciate-retaining tibial component and 19 patients (21 knees) a cemented NexGen Option cruciate-retaining tibial component. Follow-up with RSA, and clinical and radiographic examinations were done at 5 years. In bilaterally operated patients, the statistical analyses included only the first-operated knee. Results Both groups had most migration within the first 3 months, the TM implants to a greater extent than the cemented implants. After 3 months, both groups stabilized and remained stable up to the 5-year follow-up. Interpretation After a high initial degree of migration, the TM tibia stabilized. This stabilization lasted for at least 5 years, which suggests a good long-term performance regarding fixation. The cemented NexGen CR tibial components showed some migration in the first 3 months and then stabilized up to the 5-year follow-up. This has not been reported previously.

Place, publisher, year, edition, pages
2013. Vol. 84, no 4, 398-405 p.
National Category
URN: urn:nbn:se:umu:diva-80009DOI: 10.3109/17453674.2013.799418ISI: 000324265000014OAI: diva2:646092
Available from: 2013-09-06 Created: 2013-09-06 Last updated: 2016-02-09Bibliographically approved

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