Influence of CPP-ACPF paste and fluorid varnish on bracket shear bond strength of two adhesive systems

Abstract

The aim of this in vitro study was to investigate the effect of CPP-ACPF paste and fluorid varnish (5% NaF) application before/after acid etching on the bracket-enamel shear bond strength (SBS) of a total etch system and to compare them one self-etch system. 160 teeth were divided into eight equal groups (20teeth/group), two control and six test groups: 1-Control etch, 2-CPP-ACPF before etch, 3-CPP-ACPF after etch, 4-%5NaF before etch, 5-%5NaF after etch; 6-Control-selfetch, 7-CPP-ACPF before self-etch, 8-%5NaF before self-etch. Debonding forces will be measured with a universal testing machine at a crosshead speed of 0.5 mm/min. Enamel surface treatment with %5NaF before acid-etching significantly decreased SBS compared to the control and to its application before acid-etching both etch and self-etch adhesives (p