Author(s):
Archangelo, Carlos Marcelo ; Rocha, Eduardo Passos [UNESP] ; Anchieta, Rodolfo Bruniera [UNESP] ; Martin, Manoel ; Freitas, Amilcar Chagas [UNESP] ; Ko, Ching-Chang ; Cattaneo, Paolo M.
Date: 2014
Persistent ID: http://hdl.handle.net/11449/72701
Origin: Oasisbr
Subject(s): Dental ceramics; Finite element analysis; Laminate veneers; Numerical analyses; resin cement; comparative study; dental bonding; dental procedure; denture; finite element analysis; human; mechanical stress; physiology; premolar tooth; tensile strength; tooth prosthesis; Bicuspid; Dental Bonding; Dental Porcelain; Dental Stress Analysis; Dental Veneers; Finite Element Analysis; Humans; Resin Cements; Stress, Mechanical; Tensile Strength; Dental ceramics; Dental ceramics; Finite element analysis; Finite element analysis; Laminate veneers; Laminate veneers; Numerical analyses; Numerical analyses; resin cement; resin cement; comparative study; comparative study; dental bonding; dental bonding; dental procedure; dental procedure; denture; denture; finite element analysis; finite element analysis; human; human; mechanical stress; mechanical stress; physiology; physiology; premolar tooth; premolar tooth; tensile strength; tensile strength; tooth prosthesis; tooth prosthesis; Bicuspid; Bicuspid; Dental Bonding; Dental Bonding; Dental Porcelain; Dental Porcelain; Dental Stress Analysis; Dental Stress Analysis; Dental Veneers; Dental Veneers; Finite Element Analysis; Finite Element Analysis; Humans; Humans; Resin Cements; Resin Cements; Stress, Mechanical; Stress, Mechanical; Tensile Strength; Tensile Strength
Description
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Objectives: Based on a maxillary premolar restored with laminate veneer and using the 3-D finite element analysis (FEA) and mCT data, the aim of this study was to evaluate the influence of different types of buccal cusp reduction on the stress distribution in the porcelain laminate veneer and in the resin luting cement layer. Methods: Two 3-D FEA models (M) of a maxillary premolar were built from mCT data. The buccal cusp reduction followed two configurations: Mt-buccal cusp completely covered by porcelain laminate veneer; and Mp-buccal cusp partially covered by porcelain laminate veneer. The loading (150 N in 458) was performed on the top of the buccal cusp. The finite element software (Ansys Workbench 10.0) was used to obtain the maximum shear stress (σmax) and maximum principal stress (σmax). Results: The Mp showed reduced the stress (σmax) in porcelain laminate veneer (from-2.3 to 24.5 MPa) in comparison with Mt (from-5.3 to 27.4 MPa). The difference between the peak and lower stress values of σmax in Mp (-6.8 to 26.7 MPa) and Mt (-5.3 to 27.4 MPa) was similar for the resin luting cement layer. The structures not exceeded the ultimate tensile strength or the shear bond strength. Conclusions: Cusp reduction did not affect significant increase in σmax and τmax. The Mt showed better stress distribution (τmax) than Mp. © 2011 Published by Elsevier Ireland on behalf of Japan Prosthodontic Society.
Institute Federal of Parana, Londrina, Parana
Sao Paulo State University Faculty of Dentistry of Arac ̧atuba-UNESP Department of Dental Materials and Prosthodontics, Araçatuba, São Paulo
University of North Carolina at Chapel Hill School of Dentistry Department of Orthodontics, Chapel Hill, NC
University of Aarhus Faculty of Health Sciences Department of Orthodontics, Aarhus
Sao Paulo State University Faculty of Dentistry of Arac ̧atuba-UNESP Department of Dental Materials and Prosthodontics, Araçatuba, São Paulo
