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Journal of Dental Research, Vol. 82, No. 10, 819-823 (2003)
DOI: 10.1177/154405910308201011

Prediction of Mechanical Properties of the Cancellous Bone of the Mandibular Condyle

L.J. van Ruijven*, E.B.W. Giesen1, M. Farella2 and T.M.G.J. van Eijden

Department of Functional Anatomy, Academic Center for Dentistry Amsterdam (ACTA), Meibergdreef 15, 1105 AZ Amsterdam, the Netherlands;
1 Department of Orthodontics and Oral Biology, University Medical Centre Nijmegen, Nijmegen, the Netherlands;
2 Department of Orthodontics, University of Naples "Federico II", Naples, Italy;


Figure 1
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  		Figure 1. A schematic overview of the different steps in the analysis. A condyle is separated from a human mandible. Cylindrical specimens were taken from the condyle at different orientations and locations. The specimens were scanned in a micro-CT system. The scans were used to construct finite element (FE) models and to calculate the Mean Intercept Lengths {lambda}1, {lambda}2, and {lambda}3 to describe the cancellous bone structure.

 

Figure 2
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  		Figure 2. Scatter plots of the apparent stiffness as predicted by the structure of the cancellous bone (top) and a finite element analysis (bottom) vs. the experimentally determined stiffnesses. The lines depict all points where the two stiffnesses are equal.

 

Figure 3
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  		Figure 3. The dependence of the ratios between the apparent stiffnesses (ci) and the tissue stiffness (Et) for the 3 main orientations of the trabecular structure on the bone volume. The curves were constructed based on Eq. (2)Go and the values given in the Table for the mean intercept lengths {lambda}1, {lambda}2, and {lambda}3. Note that the curves in Fig. 3Go show ratios.

 

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