Influence of the use of sodium hypochlorite 5% and salvia extract during biomechanical preparation on adhesive strength of intra-root pins: evaluation by the push-out test

• Grant number: 12/08828-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: December 01, 2012
• End date: November 30, 2013
• Field of knowledge: Health Sciences - Dentistry - Endodontics
• Principal Investigator: Cláudio Antonio Talge Carvalho
• Grantee: Jessica Zanella Ponomavenco
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil

Abstract

This study will assess the influence of the use of irrigating solution used during root canal preparation on the adhesive cementation of prefabricated fiberglass. The bond strength between different regions of the root and the fiberglass pins cemented into the root canal will be evaluated through the push-out test and observation of the type of failure will be held in a stereomicroscope. For this study, we will use 36 human teeth, all equally prepared. The irrigating solutions used for biomechanical preparation are: saline solution, sodium hypochlorite 5%, and Salvia extract and the resin cement used for cementation of the seals will be dual-curing. After cementation, the specimens will be sectioned to yield slices of approximately 3 mm 2 each (cervical, middle, and apical) and submitted to mechanical testing of push-out. The results will be analyzed by ANOVA and Tukey tests with a significance level of 5% for the analysis of the mechanical test and performed a qualitative analysis of the type of failure that occurred. (AU)