Analysis of stress induced by screws in the vertebral fixation system
Acta ortop. bras
;
22(1): 17-20, 2014. graf
Artigo
em Inglês
| LILACS
| ID: lil-703992
ABSTRACT
Objective:
To compare, using photoelasticity, internal stress produced by USS II type screw with 5.2 and 6.2 mm external diameters, when submitted to three different pullout strengths.Methods:
Two photoelastic models were especially made. The simulation was performed using loads of 1.8, 2.4 e 3.3 kgf.The fringe orders were evaluated around the screws. In all the models analyzed the shear stress were calculated.Results:
Independently of the applied load, the smaller screw showed higher values of shear stress.Conclusion:
According to the analysis performed, we observed that the place of highest stress was in the first thread of the lead, close to the head of the screws. Experimental study. .
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Idioma:
Inglês
Revista:
Acta ortop. bras
Assunto da revista:
Ortopedia
Ano de publicação:
2014
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade de Sao Paulo/BR
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