Abstract
ObjectiveThe purpose of this study was to determine the quality of the size of 0.018”×0.025” slots in brackets of three trading companies (3M, GAC and ORMCO). Methods120 first premolar stainless steel brackets of three trading houses were analyzed forming three groups of 40 brackets. Each bracket was observed under a Profile Projector Microscope. Three measurements were obtained for each slot: depth, internal and external height. The data were tabulated and statistically analyzed by the ANOVA test and the Student’s t test. ResultsThe results showed that there were statistically significant differences in depth and internal and external height between the bracket’s slot of 3 different companies (p < 0.05). The companies 3M and GAC fulfilled the manufacturer’s specifications (p < 0.05). In terms of internal height, GAC complied with the manufacturer’s specifications (p < 0.05). In relation to external height, ORMCO complied with what is specified by the manufacturer (p < 0.05).
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