%0 Journal Article
%T An¨¢lise fotoel¨¢stica da regi£¿o inferior do corpo vertebral L4
%A Fakhouri
%A Sarah Fakher
%A Zamarioli
%A Ariane
%A Shimano
%A Marcos Massao
%A Defino
%A Helton Luiz Aparecido
%A Araujo
%A Cleudmar Amaral
%A Shimano
%A Antonio Carlos
%J Acta Ortop¨¦dica Brasileira
%D 2012
%I Sociedade Brasileira de Ortopedia e Traumatologia
%R 10.1590/S1413-78522012000100003
%X objective: to analyze the shear forces on the vertebral body l4 when submitted to a compression force by means of transmission photoelasticity. methods: twelve photoelastic models were divided into three groups, with four models per group, according to the positioning of the sagittal section vertebrae l4-l5 (sections a, b and c). the simulation was performed using a 15n compression force, and the fringe orders were evaluated in the vertebral body l4 by the tardy compensation method. results: photoelastic analysis showed, in general, a homogeneous distribution in the vertebral bodies. the shear forces were higher in section c than b, and higher in b than a. conclusion: the posterior area of l4, mainly in section c, showed higher shear concentrations, corresponding to a more susceptible area for bone fracture and spondylolisthesis. economic and decision analyses - development of an economic or decision model. level i
%K spine
%K biomechanis
%K tension.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1413-78522012000100003&lng=en&nrm=iso&tlng=en