Resumo

VALENCIA ALVAREZ, José A et al. Friction evaluation in stainless steel arches with and withouth glass coating using the Sol-Gel method. Rev Fac Odontol Univ Antioq [online]. 2009, vol.20, n.2, pp.161-170. ISSN 0121-246X.

INTRODUCTION: the aim of this in vitro study was to compare the static and dynamic frictional force generated between surfaces of metallic brackets and glass coated applied by the Sol-Gel method, and non coated wires. METHODS: metallic brackets (0,018 x 0,025”), stainless steel wires (0,016 x 0,016”) and elastic ligatures were used in all frictional tests. All components were characterized using SE M and optical microscopy. The frictional force was evaluated using a machine of tests Testresources^® in dry environment. RESULTS: the results showed that the stainless steel wires without modification (control group) showed the lowest values of static friction force followed by the stainless steel wires group coated by Sol-Gel method and the wires group with thermic treatment (thermic group). For dynamic friction force, the Sol-Gel group showed the smallest values, followed by the control group and the thermal group. CONCLUSIONS: the evaluated coating did not show a better frictional performance applied on stainless steel brackets in comparison with the control group.

Palavras-chave : Friction; brackets; steel wires; coatings; Sol-Gel.

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