Influence of plate bending stiffness on mechanical properties of healing fracture, mouse femora

Steck, Roland, Ueno, M., Gregory, Laura S., Rijken, Noortje, Wullschleger, Martin E., Itoman, M, & Schuetz, Michael (2011) Influence of plate bending stiffness on mechanical properties of healing fracture, mouse femora. Journal of Orthopaedic Research, 29(8), pp. 1245-1250.

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Abstract

Mechanically well-defined stabilization systems have only recently become available, providing standardized conditions for studying the role of the mechanical environment on mouse bone fracture healing. The aim of this study was to characterize the time course of strength recovery and callus development of mouse femoral osteotomies stabilized with either low or high flexibility (in bending and torsion) internal fixation plates. Animals were euthanized and femora excised at 14, 21, and 28 days post-osteotomy for microCT analysis and torsional strength testing. While a larger mineralized callus was observed in osteotomies under more flexible conditions at all time points, the earlier bridging of the mineralized callus under less flexible conditions by 1 week resulted in an earlier recovery of torsional strength in mice stabilized with low flexibility fixation. Ultimate torque values for these bones were significantly higher at 14 and 21 days post-osteotomy compared to bones with the more flexible stabilization. Our study confirms the high reproducibility of the results that are achieved with this new implant system, therefore making it ideal for studying the influence of the mechanical environment on murine fracture healing under highly standardized conditions.

Impact and interest:

6 citations in Scopus
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5 citations in Web of Science®

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ID Code: 51406
Item Type: Journal Article
Refereed: Yes
Additional URLs:
DOI: 10.1002/jor.21341
ISSN: 1554-527X (online) 0736-0266 (print)
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2011 Orthopaedic Research Society.
Deposited On: 03 Jul 2012 23:27
Last Modified: 26 Aug 2012 08:09

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