Influence of buccal cusp reduction when using porcelain laminate veneers in premolars. A comparative study using 3-D finite element analysis

Autor(es)

Archangelo, Carlos Marcelo ^[1] ; Rocha, Eduardo Passos ^[2] ; Anchieta, Rodolfo Bruniera ^[2] ; Martin, Jr., Manoel ^[1] ; Freitas, Jr., Amilcar Chagas ^[2] ; Ko, Ching-Chang ^[3] ; Cattaneo, Paolo M. ^[4]

Afiliação do(s) autor(es)

^[1] Inst Fed Parana, Londrina, Parana - Brazil

^[2] Sao Paulo State Univ, Fac Dent Aracatuba, UNESP, Dept Dent Mat & Prosthodont, Sao Paulo - Brazil

^[3] Univ North Carolina Chapel Hill, Dept Orthodont, Sch Dent, Chapel Hill, NC - USA

^[4] Univ Aarhus, Dept Orthodont, Fac Hlth Sci, Aarhus - Denmark

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PROSTHODONTIC RESEARCH; v. 55, n. 4, p. 221-227, OCT 2011.
• Citações Web of Science: 5

Resumo

Objectives: Based on a maxillary premolar restored with laminate veneer and using the 3-D finite element analysis (FEA) and mu CT 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 45 degrees) 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 (tau(max)) and maximum principal stress (sigma(max)). Results: The Mp showed reduced the stress (smax) 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 smax 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 smax and tmax. The Mt showed better stress distribution (tmax) than Mp. (C) 2011 Published by Elsevier Ireland on behalf of Japan Prosthodontic Society. Open access under CC BY-NC-ND license. (AU)

• Processo FAPESP: 08/00209-9 - Comportamento biomecânico de uma prótese parcial removível classe I mandibular suportada distalmente por um implante osseointegrado: análise tridimensional de elementos finitos
• Beneficiário: Eduardo Passos Rocha
• Modalidade de apoio: Auxílio à Pesquisa - Regular