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Micro-shear bond strength of adhesives with different degrees of acidity: effect on sound dentin and artificially hypermineralized

Grant number: 12/25208-0
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2013
Effective date (End): December 31, 2013
Field of knowledge:Health Sciences - Dentistry
Principal Investigator:Edson Alves de Campos
Grantee:Tamíris da Costa Neves Possetti
Host Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil


The aim of this study is to evaluate the bond strength of different adhesive systems, with different degrees of acidity, in sound dentin and artificially hipermineralized. For this study will be selected 76 sound human molars. The occlusal surfaces of the molars will be removed with a low-speed diamond saw to expose flat dentin surfaces. The teeth will be divided randomly into two groups, according to the type of dentin normal (N / n = 36) and artificially hypermineralized (H / n = 40). The set H will receive treatment for hipermineralization and four specimens will be randomly selected and will be observed by SEM to confirm the procedure. Each group will be divided into two subgroups, according to the self-etching adhesive system used: Clearfil S3 Bond (n = 18), Options All in One (n = 18), Clearfil SE Bond (n=18), and Adhese (n = 18) and will be followed by composite application. After a storage period of 7 days in artificial saliva at 37oC, the micro-shear bond strength will be carried out using a universal testing machine at 0.5mm/min. Subsequently, the fracture pattern of each specimen will be determined. One specimen of each group will be prepared to evaluate the adhesive interface by SEM. The results will be submitted to appropriate statistical tests, depending on data distribution. (AU)

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