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International journal of odontostomatology

On-line version ISSN 0718-381X

Abstract

FARFAN RODRIGUEZ, Mary Loly; MATTOS-VELA, Manuel Antonio  and  SOLDEVILLA GALARZA, Luciano Carlos. Force Degradation of Latex and Non Latex Intermaxillary Elastics. Int. J. Odontostomat. [online]. 2017, vol.11, n.3, pp.363-368. ISSN 0718-381X.  http://dx.doi.org/10.4067/S0718-381X2017000300363.

The purpose of this study was to compare the force degradation between latex and non latex elastic 3/16” 6oz. The sample consisted of 30 elastics per group and time interval, 180 latex and 180 non latex elastics were used. The initial force was measured in 30 latex elastics and 30 non latex elastics. Others elastics were subjected to static traction in conditions of humidity and temperature for 1, 3, 6, 12 and 24 hours. The force was measured with a dynamometer (Correx 250 g, Germany). Wilcoxon test and Mann-Whitney test was employed to determine significant differences. The latex elastics showed a mean force degradation of 13.8 % during the first hour, 17.4 % at 3 hours, 18.2 % at 6 hours, 21 % at 12 hours and 23. 4 % at 24 hours. The non elastics latex showed a mean force degradation of 32.5 % during the first hour, 39.6 % at 3 hours, 44.4 % at 6 hours, 51.1 % at 12 hours and 56% at 24 hours. It was concluded that the latex elastics force degradation was less than the non-elastics latex in all times.

Keywords : Orthodontics; Latex; Orthodonctic Appliances, Elastic Modulus.

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