Biomechanical Properties of the Condyle Created by Osteodistraction

A new condyle can be reconstructed by osteodistraction, but the biomechanical properties of the neocondyle remain unknown. This study examined the hypothesis that the biomechanical properties of neocondylar cancellous bone could reach control levels 24 weeks after its creation by osteodistraction. T...

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Bibliographic Details
Published in:Journal of dental research 2008-05, Vol.87 (5), p.490-494
Main Authors: Zhu, S., Hu, J., Zou, S., Kakudo, K., Tsunokuma, M.
Format: Article
Language:English
Subjects:
Animals
Biomechanical Phenomena
Bone Density - physiology
Bone Regeneration - physiology
Compressive Strength
Dentistry
Goats
Male
Mandibular Condyle - physiology
Mandibular Condyle - surgery
Mandibular Condyle - ultrastructure
Osteogenesis, Distraction - methods
Range of Motion, Articular - physiology
Reconstructive Surgical Procedures - methods
Statistics, Nonparametric
Temporomandibular Joint - physiology
Temporomandibular Joint - surgery
Temporomandibular Joint - ultrastructure
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Summary:A new condyle can be reconstructed by osteodistraction, but the biomechanical properties of the neocondyle remain unknown. This study examined the hypothesis that the biomechanical properties of neocondylar cancellous bone could reach control levels 24 weeks after its creation by osteodistraction. The right mandibular condyles were removed and reconstructed by osteo-distraction in 16 adult goats. Their contralateral condyles served as controls. Microstructural and mechanical properties were examined by microcomputed tomography and mechanical testing. At 24 weeks after distraction, the neocondyle grew larger in size, but the shape and histological features were similar to those of the controls. The cancellous bone of the neocondyle even appeared to be more dense and stiffer in comparison with the control condyle. The results of this study suggest that the neocondyle created by osteodistraction develops nearly normal biomechanical properties for functional loading by 24 weeks after creation.
ISSN:0022-0345
1544-0591
DOI:10.1177/154405910808700503