Analysis of the adhesion quality of different metallic bracket bases

Danielle Morello PARK, Fábio Lourenço ROMANO, Ary dos SANTOS-PINTO, Lídia Parsekian MARTINS, Darcy Flávio NOUER

Considering the differences in the bracket bases currently used, it was performed a study with the purpose of comparing three different metallic bracket bases commercially available. It was used 36 human bicuspids divided into 3 groups of 12 teeth. These teeth were immersed in a troquel with gypsy stone type IV and positioned with their buccal face perpendicular to the troquel base. For each group of teeth it was bonded one of the three brackets using Concise Orthodontic composite. Afterwards they were submitted to a shear bound strength test in a universal machine calibrated for a 0,5mm/minute speed. Monobloc bracket base showed the greater mean value of adhesive resistance (x = 28,19 Kgf/cm2), result statistically superior to that shown by Equilibrium (x = 18,07 Kgf/cm2) and Dynalock (x = 18,24 Kgf/cm2) ones. The ARI (Adhesive reminiscent index) showed no statistically difference among the bracket bases studied.

Keywords: Orthodontic. Bonding. Shear bond strength. Bracket. Base.

Saturday, May 04, 2024 04:28