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INFLUENCE OF PULP CHAMBER CLEANING METHODS ON DENTIN INTRACORONARY ADHESIVE BOND STRENGHT

Grant number: 11/06023-7
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): November 01, 2011
Effective date (End): December 31, 2013
Field of knowledge:Health Sciences - Dentistry - Endodontics
Principal researcher:Caio Cezar Randi Ferraz
Grantee:Juliana Delatorre Bronzato
Home Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil

Abstract

The aim of this study is to investigate the influence of cleaning methods of root canal sealer on dentin intracoronary adhesive bond strenght. The pulp tissue will be removed and the mouth of the root canal will be sealed with temporary restorative material.Twenty crowns of bovine incisors will be sectioned to expose the pulp chamber. Subsequently, the endodontic sealer Endomethasone N, newly tooled is placed in the pulp chamber. After 5 minutes, the specimens will be divided into four groups, according to the clean method of pulp chamber dentin used: G1, no root canal sealer (control); G2, 0.9% sodium chlorite (NaCl); G3, etanol; G4, NaCl followed by drill. After cleaning, there will be the drying of the pulp chamber and the teeth will be restored with a self-etching adhesive system Clearfil SE Bond and a Filtek Z250 composite resin. All specimens will be sectioned to produce rectangular sticks and dentin/resin interface will be submitted to microtensile bond testing in a universal testing machine (EZ Test, Shimadzu Co., Kyoto, Japão). Later there will be the analysis of fracture of the samples and the values of bond strength will be analyzed statistically.

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