title: Stress analysis of an upper central incisor restored with different posts.
abstract: 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 45 degrees 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.
authors.affiliation: School of Dentistry and School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
authors.forename: R
authors.initials: R
authors.lastname: de Castro Albuquerque
authors.forename: L T de Abreu
authors.initials: LT
authors.lastname: Polleto
authors.forename: R H B T S
authors.initials: RH
authors.lastname: Fontana
authors.forename: C A
authors.initials: CA
authors.lastname: Cimini
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000032:analysis; D003793:Dental Restoration, Permanent / Q000592:standards*; D003799:Dental Stress Analysis / Q000379:methods*; D020342:Finite Element Analysis; D006801:Humans; D007180:Incisor / Q000502:physiology*; D011176:Post and Core Technique; D013193:Stainless Steel / Q000032:analysis; D014025:Titanium / Q000032:analysis
chemical_list: D013193:Stainless Steel; D017438:Bisphenol A-Glycidyl Methacrylate; D014025:Titanium