Diferencias en la resistencia friccional en combinaciones de brackets de autoligado con alambres de beta-titanio en movimientos de segundo orden.

Abstract

Objective: To compare the frictional resistance and stiffness 3-wire types of Beta-titanium with two different calibres, in 6 brackets active-passive self, simulating movements II order in a prototype acrylic to a distance of 5mm interbracket. Materials and Methods: This in vitro study compared the frictional strength and rigidity with beta-titanium wires two calibers (0.016 x 0.022 "/ 0.019 x 0.025) on brackets of passive and active self-ligating in ranura 0.022. The friction was measured on a universal testing machine properly calibrated. Data was exported to Stata 13.0 for analysis. For quantitative variables averages were calculated with standard deviations as measures of central tendency and dispersion, respectively. An analysis of variance was performed using the ANOVA test to assess whether there were differences between the Bonferroni test to identify specifically among which subgroups differences were found, and corrected the level of statistical significance according to the number of comparisons (p-value of <0.001).