dc.contributor | UNISUL-SC and UNIASSELVI | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | Universidade de São Paulo (USP) | |
dc.date.accessioned | 2014-05-27T11:30:30Z | |
dc.date.available | 2014-05-27T11:30:30Z | |
dc.date.created | 2014-05-27T11:30:30Z | |
dc.date.issued | 2013-08-30 | |
dc.identifier | Dental Press Journal of Orthodontics, v. 18, n. 2, 2013. | |
dc.identifier | 2176-9451 | |
dc.identifier | 2177-6709 | |
dc.identifier | http://hdl.handle.net/11449/76367 | |
dc.identifier | 10.1590/S2176-94512013000200007 | |
dc.identifier | S2176-94512013000200007 | |
dc.identifier | 2-s2.0-84882932748 | |
dc.identifier | 2-s2.0-84882932748.pdf | |
dc.description.abstract | Objective: To determine the mechanical characteristics of teardrop loop with and without helix fabricated using different metal alloy compositions (stainless steel and beta-titanium), submitted to different intensities of bends preactivation (0° and 40°), and with different cross-sectional dimension of the wire used to build these loops (0.017 x 0.025-in and 0.019 x 0.025-in). Methods: Eighty loops used to close spaces were submitted to mechanical tests. The magnitudes of horizontal force, the moment/force ratio, and the load/deflection ratio produced by the specimens were quantified. Loops were submitted to a total activation of 5.0 mm and the values were registered for each 1.0 mm of activation. For statistic data analysis, a analysis of variance was performed and a Tukey's Multiple Comparison test was used as supplement, considering a 5% level of significance. Results: In general, teardrop loops with helix produced lower magnitudes of horizontal force and load/deflection ratio, and higher moment/force ratio than teardrop loops without helix. Among all analyzed variables, metal alloy composition presented greater influence in the horizontal force and in the load/deflection ratio. The moment/force ratio showed to be more influenced by the preactivation of loops for space closure. © 2013 Dental Press Journal of Orthodontics. | |
dc.language | eng | |
dc.relation | Dental Press Journal of Orthodontics | |
dc.relation | 0,489 | |
dc.relation | 0,489 | |
dc.rights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | Biomechanics | |
dc.subject | Orthodontic space closure | |
dc.subject | Orthodontics | |
dc.subject | Tooth extraction | |
dc.title | Determination of the force systems produced by different configurations of tear drop orthodontic loops | |
dc.type | Artículos de revistas | |