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Inaccuracies in the hybrid layer formation: a 3-D structural analysis by finite element

Grant number: 08/08479-5
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2009
Effective date (End): December 31, 2009
Field of knowledge:Health Sciences - Dentistry - Dental Clinics
Principal Investigator:Eduardo Passos Rocha
Grantee:Ana Paula Martini
Host Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil


OBJECTIVES: The mechanic and micromechanics studies by finite element analysis (FE) do not show data about the influence of the imperfections on the stress distribution in the hybrid layer (HL) based on self-etching adhesive system. The purpose of the present study is to evaluate the stress distribution on the HL of a dentin specimen restored with composite resin, considering the presence of voids between the HL and the intact dentin. MATERIAL AND METHODS: Three models (M) will be built in the program SolidWorks to simulate various HL formations in a specimen of dentin restored with composite resin (41x41x82 µm): M1 - complete formation of the HL; M2 - partial formation of the HL (75%) and presence of voids (25%v/v) in contact with the intact dentin; M3 - partial formation of the HL (50%) and presence of voids (50%v/v) in contact with the intact dentin. For all models, the HL and the resin TAGs will be considered with 3µm of thickness and 19 µm of length, respectively. The models will be isotropic, homogeneous, linearly elastic, and in a plane strain. The loading (L) will be distributed and vertical on the top of the composite resin 0,03N. RESULTS: The results will be analyzed under the maximum principal stress (smax) and maximum principal strain. The smax will be obtained for each structure of the hybrid layer. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ANA PAULA MARTINI; RODOLFO BRUNIERA ANCHIETA; EDUARDO PASSOS ROCHA; AMILCAR CHAGAS FREITAS JUNIOR; ERIKA OLIVEIRA DE ALMEIDA; RENATO HERMAN SUNDFELD; MARCO ANTONIO LUERSEN. Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis. Journal of Applied Oral Science, v. 17, p. 19-26, . (08/00209-9, 08/08479-5)

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