Erschienen in:
01.07.2012 | Original Article
Effect of low-intensity pulsed ultrasound stimulation on gap healing in a rabbit osteotomy model evaluated by quantitative micro-computed tomography-based cross-sectional moment of inertia
verfasst von:
Kenji Tobita, Takuya Matsumoto, Satoru Ohashi, Masahiko Bessho, Masako Kaneko, Isao Ohnishi
Erschienen in:
Journal of Orthopaedic Science
|
Ausgabe 4/2012
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Abstract
Background
It has been previously demonstrated that low-intensity pulsed ultrasound stimulation (LIPUS) enhances formation of the medullary canal and cortex in a gap-healing model of the tibia in rabbits, shortens the time required for remodeling, and enhances mineralization of the callus. In the current study, the mechanical integrity of these models was confirmed. In order to do this, the cross-sectional moment of inertia (CSMI) obtained from quantitative micro-computed tomography scans was calculated, and a comparison was made with a four-point bending test.
Methods
This parameter can be analyzed in any direction, and three directions were selected in order to adopt an XYZ coordinate (X and Y for bending; Z for torsion).
Results
The present results demonstrated that LIPUS improved earlier restoration of bending stiffness at the healing site. In addition, LIPUS was effective not only in the ultrasound-irradiated plane, but also in the other two planes.
Conclusions
CSMI may provide the structural as well as compositional determinants to assess fracture healing and would be very useful to replace the mechanical testing.