Stress analysis of an upper central incisor restored with different posts
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Data
2003-09-01
Autores
Albuquerque, R. D.
Polleto, LTD
Fontana, RHBTS
Cimini, C. A.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Blackwell Publishing
Resumo
The effect of different anatomic shapes and materials of posts in the stress distribution on an endodontically treated incisor was evaluated in this work. This study compared three post shapes (tapered, cylindrical and two-stage cylindrical) made of three different materials (stainless steel, titanium and carbon fibre on Bisphenol A-Glycidyl Methacrylate (Bis-GMA) matrix). Two-dimensional stress analysis was performed using the Finite Element Method. A static load of 100N was applied at 45degrees inclination with respect to the incisor's edge. The stress concentrations did not significantly affect the region adjacent to the alveolar bone crest at the palatine portion of the tooth, regardless of the post shape or material. However, stress concentrations on the post/dentin interface on the palatine side of the tooth root presented significant variations for different post shapes and materials. Post shapes had relatively small impact on the stress concentrations while post materials introduced higher variations on them. Stainless steel posts presented the highest level of stress concentration, followed by titanium and carbon/Bis-GMA posts.
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Palavras-chave
teeth, restoration, posts, bioengineering, stress analysis, finite element method
Como citar
Journal of Oral Rehabilitation. Oxford: Blackwell Publishing Ltd, v. 30, n. 9, p. 936-943, 2003.