Influence of chlorhexidine on the adhesive resistance restauration under adhesive interface degradation

• Grant number: 11/21375-7
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2012
• End date: December 31, 2012
• Field of knowledge: Health Sciences - Dentistry - Pediatric Dentistry
• Principal Investigator: Rodrigo Galo
• Grantee: Mayara Terra Marinho
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Objectives: this study is to evaluate in vitro the influence of chlorhexidine, contained in the acid phosphoric or applied after the acid conditioning, in the resistance of union of an adhesive total etching system to the teeth after degradation of the adhesive interface. For that an area circulate of 3mm in diameter will be delimited in 180 fragments of coronary dentine of human molars recently extracted, and these will be divided at random into 3 groups, according to the treatment of the dentine surface previously the application of the adhesive: G1 - acid phosphoric 37%; G2 - acid phosphoric 37% with chlorhexidine; and, G3 - acid phosphoric 37% + chlorhexidine 2%. After the procedures, each group will be divided into 4 subgroups according to the time thermocycling (TC) and water storage (WS): A - Without TC/24 h of water storage; B - 500 TC / 1 week of water storage; C - 2000 TC / 1 month of water storage; and, 12000 TC / 6 months of water storage. Following, the specimens will be carried out with the shear bond strength tests. The results obtained will be analyzed and interpreted as regards the adhesive resistance of the treatment in question, as well as the times of degradation to which the groups were submitted.(AU)