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International journal of odontostomatology

versión On-line ISSN 0718-381X

Resumen

AMARAL, Maria Rita Danelon do; NETO, Perrim Smith; PITHON, Matheus Melo  y  OLIVEIRA, Dauro Douglas. Evaluation In Vitro of Frictional Resistance of Self-Ligating Esthetic and Conventional Brackets. Int. J. Odontostomat. [online]. 2014, vol.8, n.2, pp.261-266. ISSN 0718-381X.  http://dx.doi.org/10.4067/S0718-381X2014000200019.

The objective of this study was to evaluate the frictional resistance created in self-ligating esthetic and conventional brackets during simulated orthodontic sliding mechanics. Four different types of brackets were used: 3 self-ligating type of different brands (Clarity SL, 3M Unitek; Damon 3®, Ormco Corporation; In-Ovation C®, GAC International), in addition to conventional esthetic brackets (Radiance®, American Orthodontics) associated with conventional elastic ligatures (Sani-tie®, GAC International) and low friction ligatures (Slide®, Leone). To simulate sliding mechanics, stainless steel wires with thicknesses of 0.018" and 0.017"x0.025" (GAC International) were used. Five groups (n=10) were submitted to five consecutive mechanical tests in a universal test machine model Emic® DL 500. The results showed low frictional levels in all tested self-ligating brackets and with use of 0.018" wire (p<0.05). However, with 0.017x0.025" wire, Groups Damon 3, Clarity SL and Slide showed lower frictional forces when compared with In-Ovation C (p>0.05). Moreover, conventional esthetic brackets associated with conventional ligatures resulted in greater frictional resistance with both wires tested (p>0.05). All the self-ligating brackets presented lower frictional levels than the conventional accessories. Active self-ligating bracket In-Ovation C, demonstrated higher degree of frictional force when associated with rectangular wire. The Slide® ligature may be an alternative to the use of self-ligating brackets.

Palabras clave : Friction; tensile strength; orthodontic brackets.

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