Infant Skull and Suture Properties: Measurements and Implications for Mechanisms of Pediatric Brain Injury

[+] Author and Article Information
Susan S. Margulies, Kirk L. Thibault

Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104

J Biomech Eng 122(4), 364-371 (Mar 28, 2000) (8 pages) doi:10.1115/1.1287160 History: Received January 07, 1999; Revised March 28, 2000
Copyright © 2000 by ASME
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Infant cranial vault: Shaded areas represent approximate size and location of skull and suture samples removed.
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Schematic of finite element mesh. Refer to text for skull and suture properties.
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Schematic diagram of yield criteria for tensile tests
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Human infant cranial bone specimens: (a) rupture modulus, (b) elastic modulus, and (c) energy absorbed to failure plotted against age
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Maximum principal strain in idealized infant head finite element model at t=5 ms (at peak load) for adult braincase properties and pediatric properties, for half-sine load magnitudes of 1000 N and 5000 N, respectively
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Elastic modulus versus age for human infant cranial bone. Human data obtained in the current study shows agreement with the literature for quasi-static three-point bending.
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(a) Elastic modulus of porcine and human infant cranial bone determined from three-point bending tests; (b) rupture modulus of porcine and human infant cranial bone; (c) energy absorbed to failure of porcine and human infant cranial bone; slow rate (2.54 mm/min) and fast rate (2540 mm/min)



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