Rendón-Arias, L. A.; Cano-Correa, G. A.; Peláez-Vargas, A.; Jaramillo-Vallejo, P. M.; García-García, C.; Montoya-Góez, Y. In Vitro Evaluation of Frictional Resistance Between Ceramic Brackets and Orthodontic Steel Arches With and Without Glass Coatings Applied by Sol-Gel Method. Rev Fac Odontol Univ Antioq 2009, 20, 58-71.