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Cite as: Rev. Chim.
https://doi.org/10.37358/Rev.Chim.1949

OSIM Nr. R102355
ISSN Online 2668-8212
ISSN Print: 1582-9049
ISSN-L: 1582-9049

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Revista de Chimie (Rev. Chim.), Year 2016, Volume 67, Issue 5,





Silvia Izabella Pop, Dana Cristina Bratu, Katalin Koncz, Mircea Dudescu, Daniela ESian, Catalin Simon, Lavinia Ardelean
Properties of the Epoxy-coated NiTi Open Coil Springs

Abstract:

This study was aimed to determine the load-deflection ratio (stiffness) of the aesthetic nickel titanium orthodontic coil springs and to compare their stiffness with those of the uncoated springs. A total number of 40 open coil-springs (regular and epoxy coated) from two different manufacturer were purchased. From each manufacturer ten regular 7 inch length and ten epoxy coated open coil springs of the same shape and dimension were tested. The springs were subjected to compression tests, using an Instron Universal Testing Machine. The maximum stiffness value was recorded and included in the statistical analysis. The effect of coating did not show statistically significant different stiffness values in the case of Ortho Technology coil springs. The Azdent coated coil spring have showed statistically significant lower stiffness values than the rest of the tested coil springs. Coating might affect the stiffness of an orthodontic coil spring. Keywords: Epoxy-coated nickel-titanium, coil springs, orthodontics, mechanical properties


Issue: 2016, Volume 67, Issue 5
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