Biomechanics of torsion in the human mandible

American Journal of Physical Anthropology
David J Daegling, W L Hylander

Abstract

Comparative investigations of mandibular function among primates have relied upon elementary structural models to estimate states of masticatory stress and strain. In these studies, mandibular corpus morphology is idealized as a homogeneous, isotropic symmetrical body of invariant geometry, and this morphological abstraction is used to infer relative levels of stress and strain in the jaw. In reality, none of the limiting conditions assumed by these models is satisfied; consequently, it is prudent to ask whether this "textbook" engineering approach is valid for the inference of biomechanical behavior. In this study, the predictions of various geometric representations of the mandibular corpus are evaluated against strains recorded in a sample of human jaws loaded in torsion. Symmetrical geometrical models (including various "robusticity" shape indices), although convenient, are probably not consistently reliable for predicting the distribution of strains in the corpus. The experimental data suggest that variations in cortical thickness within sections play a significant role in determining the profile of relative strains. For comparative applications, characterization of the corpus as an asymmetrical hollow ellipse (i.e., with ...Continue Reading

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Citations

Feb 25, 2014·Journal of Human Evolution·David J DaeglingWilliam L Jungers
Aug 7, 2013·The Angle Orthodontist·Susan N Al-KhateebSerene A Badran
Oct 29, 2010·Journal of Dental Biomechanics·Clarice FieldMichael Swain
May 19, 2009·Journal of Human Evolution·Daisuke B Koyabu, Hideki Endo
Jul 1, 2011·International Journal of Evolutionary Biology·Joshua M Polanski
Nov 6, 2009·American Journal of Physical Anthropology·William H Kimbel, Lucas K Delezene
Apr 3, 2008·American Journal of Physical Anthropology·Hitoshi Fukase, Gen Suwa
Apr 5, 2013·American Journal of Physical Anthropology·Andrea B Taylor, Christopher J Vinyard
Mar 3, 2011·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Jonathan M G PerryChristine E Wall
Nov 26, 2015·Journal of Cranio-maxillo-facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery·Manuel Pinheiro, J L Alves
Sep 29, 2011·American Journal of Physical Anthropology·Stefano BenazziGerhard W Weber
Jun 9, 2004·Journal of Human Evolution·Daniel E LiebermanMarisa St Claire
Oct 19, 2006·Archives of Oral Biology·David J Daegling
Jan 10, 2006·The Journal of Prosthetic Dentistry·Junro YamashitaPaul C Dechow
Oct 17, 2012·Clinical Oral Implants Research·Janice P M KanJoseph E A Palamara
Aug 6, 2002·Journal of Human Evolution·David J Daegling
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Feb 7, 2017·American Journal of Physical Anthropology·Andrew J RapoffDavid J Daegling
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Aug 5, 2000·American Journal of Physical Anthropology·D J Daegling, W L Hylander
Aug 19, 2003·American Journal of Physical Anthropology·David J Daegling, Jennifer L Hotzman
Aug 5, 2000·American Journal of Physical Anthropology·P C Dechow, W L Hylander
Feb 5, 2003·American Journal of Physical Anthropology·C L Schwartz-Dabney, P C Dechow
Jan 30, 2002·American Journal of Physical Anthropology·Andrea B Taylor
Nov 30, 2006·American Journal of Physical Anthropology·David J Daegling
Jan 22, 2019·American Journal of Primatology·Alessio VenezianoIsabelle De Groote
May 16, 2007·American Journal of Physical Anthropology·David J Daegling, W Scott McGraw
Mar 5, 2005·The Anatomical Record. Part A, Discoveries in Molecular, Cellular, and Evolutionary Biology·Ruxandra MarinescuAndrew J Rapoff
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Nov 19, 2019·Frontiers in Bioengineering and Biotechnology·Hyab Mehari AbrahaOlga Panagiotopoulou
Feb 27, 2021·BMC Oral Health·Ádám László NagyZoltán Lajos Baráth
Oct 19, 2017·Zoology : Analysis of Complex Systems, ZACS·Olga PanagiotopoulouCallum F Ross

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