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Toru Nikaido | Tokyo Medical and Dental University - Japão

Grant number: 03/05066-8
Support type:Research Grants - Visiting Researcher Grant - International
Duration: September 14, 2003 - October 12, 2003
Field of knowledge:Health Sciences - Dentistry
Principal Investigator:Mario Fernando de Goes
Grantee:Mario Fernando de Goes
Visiting researcher: Toru Nikaido
Visiting researcher institution: Tokyo Medical and Dental University (TMDU), Japan
Home Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil


The objective will be evaluate the effect of self-etching adhesives on composite cores shear bond strength to dentin, using the resin-coating technique. A low-viscosity resin composite coating (Protect Liner F- PL), two acidic monomers based-dentin bonding agents and their respective composite resin cores (CRC) will be tested (Clearfil Mega Bond - CB and DC Core Paste- DC; Unifil Bond - UB and Unifil Core-UC). Dentin surfaces will be wet-abraded with 600-grit SíC paper. Experimental groups comprised the use of adhesive systems-and their respective CRC with or without intermediary application of the PL and with (A) or without CRC light activation (S). Three cylinders of CRC (1.5 mm high and 0.8 mm diameter) will be applied on each bonded dentin surface (n = 12), using a tygon tubing mold. After storage for 24 h, bonds will be tested by micro-shear testing, in a universal machine (Instron - 0. 5mm/min). (AU)