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Clinical Orthopaedics and Related Research®
Published in: Clinical Orthopaedics and Related Research® 3/2010

01-03-2010 | Original Article

Loss of Tibial Bone Density in Patients with Rotating- or Fixed-platform TKA

Authors: Jacob T. Munro, MBChB, Salil Pandit, MBChB, Cameron G. Walker, PhD, Mark Clatworthy, MBChB, FRACS, Rocco P. Pitto, MD, PhD, FRACS

Published in: Clinical Orthopaedics and Related Research® | Issue 3/2010

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Abstract

Little is known about tibial bone remodeling with TKA and its clinical relevance. We performed a randomized clinical trial to compare tibial bone density changes in cemented components with different bearing designs. Bone density changes were assessed using quantitative computed tomography (qCT)-assisted osteodensitometry. Twenty-eight rotating-platform and 26 fixed-platform cemented TKAs were included. The nonoperated contralateral side was used as a control. CT scans were performed postoperatively and 1 year and 2 years after the index operation. Cancellous bone density loss (up to 12.6% at 2 years) was observed in all proximal tibial regions in both cohorts. In contrast, we found lower cortical bone density loss (up to 3.6% at 2 years). We found no differences in bone loss between fixed- and rotating-platform implants. The decrease of cancellous bone density after TKA suggests stress transfer to the cortical bone.
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Metadata
Title
Loss of Tibial Bone Density in Patients with Rotating- or Fixed-platform TKA
Authors
Jacob T. Munro, MBChB
Salil Pandit, MBChB
Cameron G. Walker, PhD
Mark Clatworthy, MBChB, FRACS
Rocco P. Pitto, MD, PhD, FRACS
Publication date
01-03-2010
Publisher
Springer-Verlag
Published in
Clinical Orthopaedics and Related Research® / Issue 3/2010
Print ISSN: 0009-921X
Electronic ISSN: 1528-1132
DOI
https://doi.org/10.1007/s11999-009-0794-x

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