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Type: Journal article
Title: The biomechanical role of the chondrocranium and sutures in a lizard cranium
Author: Jones, M.
Gröning, F.
Dutel, H.
Sharp, A.
Fagan, M.
Evans, S.
Citation: Royal Society Interface, 2017; 14(137):20170637-1-20170637-12
Publisher: Royal Society
Issue Date: 2017
ISSN: 1742-5689
Statement of
Marc E. H. Jones, Flora Gröning, Hugo Dutel, Alana Sharp, Michael J. Fagan and Susan E. Evans
Abstract: The role of soft tissues in skull biomechanics remains poorly understood. Not least, the chondrocranium, the portion of the braincase which persists as cartilage with varying degrees of mineralization. It also remains commonplace to overlook the biomechanical role of sutures despite evidence that they alter strain distribution. Here, we examine the role of both the sutures and the chondrocranium in the South American tegu lizard Salvator merianae. We use multi-body dynamics analysis (MDA) to provide realistic loading conditions for anterior and posterior unilateral biting and a detailed finite element model to examine strain magnitude and distribution. We find that strains within the chondrocranium are greatest during anterior biting and are primarily tensile; also that strain within the cranium is not greatly reduced by the presence of the chondrocranium unless it is given the same material properties as bone. This result contradicts previous suggestions that the anterior portion (the nasal septum) acts as a supporting structure. Inclusion of sutures to the cranium model not only increases overall strain magnitudes but also leads to a more complex distribution of tension and compression rather than that of a beam under sagittal bending.
Keywords: Chondrocranium; finite element analysis; skull; sutures; septum; cartilage
Rights: © 2017 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License, which permits unrestricted use, provided the original author and source are credited.
RMID: 0030079752
DOI: 10.1098/rsif.2017.0637
Grant ID:
Appears in Collections:Genetics publications

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