Comparative study between the techniques of acid etching in ceramics, for cementation of brackets: in vitro study

Abstract

The objective of this in vitro research is to know the best method of conditioning on feldspathic porcelain surfaces, which allows better adhesion to the brackets using hydrofluoric acid (HF) at 5% and 10% considering the times of use. It was experimented in 30 samples divided into two groups, the same ones that after conditioning with HF, were washed with water jet and dried with the compressor. The samples were sand-blasted with aluminum oxide to achieve better surface roughness, subsequently silane was established in all the crowns as a bonding agent, and then metal brackets were cemented using light-curing resin. The samples were subjected to Newton strength tests on a universal test machine. Results they revealed greater resistance with 10% of HF but no significant difference between the two options.