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Zoology (Jena). 2017 Oct;124:3-12. doi: 10.1016/j.zool.2017.06.008. Epub 2017 Jun 17.

Biomechanical implications of cortical elastic properties of the macaque mandible.

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Department of Biomedical Sciences, College of Dentistry, Texas A&M University, 3302 Gaston Avenue, Dallas, TX 75204, USA. Electronic address:
Moving Morphology and Functional Mechanics Laboratory, School of Biomedical Sciences, University of Queensland, St. Lucia 4072, Brisbane, QLD, Australia.
Department of Prosthodontics, Rutgers School of Dental Medicine, 110 Bergen Street, Newark, NJ 07103, USA.


Knowledge of the variation in the elastic properties of mandibular cortical bone is essential for modeling bone function. Our aim was to characterize the elastic properties of rhesus macaque mandibular cortical bone and compare these to the elastic properties from mandibles of dentate humans and baboons. Thirty cylindrical samples were harvested from each of six adult female rhesus monkey mandibles. Assuming orthotropy, axes of maximum stiffness in the plane of the cortical plate were derived from ultrasound velocity measurements. Further velocity measurements with longitudinal and transverse ultrasonic transducers along with measurements of bone density were used to compute three-dimensional cortical elastic properties using equations based on Hooke's law. Results showed regional variations in the elastic properties of macaque mandibular cortical bone that have both similarities and differences with that of humans and baboons. So far, the biological and structural basis of these differences is poorly understood.


Cortical bone; Craniofacial function; Elastic modulus; Mandible; Rhesus monkey

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