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Journal of Dental Research, Vol. 87, No. 5, 490-494 (2008)
DOI: 10.1177/154405910808700503

Biomaterials & Bioengineering

Biomechanical Properties of the Condyle Created by Osteodistraction

S. Zhu1, J. Hu1,*, S. Zou1, K. Kakudo2 and M. Tsunokuma2

1 The State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, China; and
2 Second Department of Oral and Maxillofacial Surgery, Osaka Dental University, Osaka, Japan

Correspondence: * corresponding author, drhu{at}vip.sohu.com

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.

Key Words: mandibular condyle • osteodistraction osteogenesis • reconstruction • microstructure • mechanical properties


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