M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch Mechanics

bTi T-type loops are a frictionless, efficient alternative for extraction space closure. Changes in the upper horizontal portion of T-type loops to improve their mechanical behavior have been proposed, but differences in their biomechanical characteristics have not been well described. This stu dy a...

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Autores principales:	Muñoz-Rendón,Wilson A, Montoya-Goez,Yesid-de-Jesús, Gómez-Gil,David F
Lenguaje:	English
Publicado:	Universidad de La Frontera. Facultad de Medicina 2016
Materias:	biomechanics T-loops beta titanium
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2016000200022
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spelling	oai:scielo:S0718-381X20160002000222016-09-23M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch MechanicsMuñoz-Rendón,Wilson AMontoya-Goez,Yesid-de-JesúsGómez-Gil,David F biomechanics T-loops beta titanium bTi T-type loops are a frictionless, efficient alternative for extraction space closure. Changes in the upper horizontal portion of T-type loops to improve their mechanical behavior have been proposed, but differences in their biomechanical characteristics have not been well described. This stu dy analyzed the biomechanical differences among three T-type loops with differential bends in their upper horizontal portion. Ninety loops (0.017"x0.025" bTi) were bent and randomly divided in 3 groups according to the form of their upper horizontal portion (Tstraight, M convex, and C-loops concave), to evaluate force characteristics up to 6 mm of activation. Stiffness, maximum horizontal loads, total loop moments, and moment-to-force ratios were obtained. Nonparametric statistical analyses were used to test differences among groups. M-loops demonstrated lower force than T- and C-loops, and higher total loop moment than T-loops. A significant increase in M-loop moment-to-force ratio compared with T- or C-loops was obtained. C- and T-loops did not demonstrate significant differences in moment-to-force ratio between them. The convex upper bend in M-loops produced an increased total loop moment compared with T-loops. M-loops demonstrated moment-to-force values slightly higher than translation values, while the other loops reported only controlled inclination values at 6 mm of activation. M-loops are ideal when a higher control of root movement is indicated since the beginning of dental retraction in segmented arch mechanics.info:eu-repo/semantics/openAccessUniversidad de La Frontera. Facultad de MedicinaInternational journal of odontostomatology v.10 n.2 20162016-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2016000200022en10.4067/S0718-381X2016000200022
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	biomechanics T-loops beta titanium
spellingShingle	biomechanics T-loops beta titanium Muñoz-Rendón,Wilson A Montoya-Goez,Yesid-de-Jesús Gómez-Gil,David F M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch Mechanics
description	bTi T-type loops are a frictionless, efficient alternative for extraction space closure. Changes in the upper horizontal portion of T-type loops to improve their mechanical behavior have been proposed, but differences in their biomechanical characteristics have not been well described. This stu dy analyzed the biomechanical differences among three T-type loops with differential bends in their upper horizontal portion. Ninety loops (0.017"x0.025" bTi) were bent and randomly divided in 3 groups according to the form of their upper horizontal portion (Tstraight, M convex, and C-loops concave), to evaluate force characteristics up to 6 mm of activation. Stiffness, maximum horizontal loads, total loop moments, and moment-to-force ratios were obtained. Nonparametric statistical analyses were used to test differences among groups. M-loops demonstrated lower force than T- and C-loops, and higher total loop moment than T-loops. A significant increase in M-loop moment-to-force ratio compared with T- or C-loops was obtained. C- and T-loops did not demonstrate significant differences in moment-to-force ratio between them. The convex upper bend in M-loops produced an increased total loop moment compared with T-loops. M-loops demonstrated moment-to-force values slightly higher than translation values, while the other loops reported only controlled inclination values at 6 mm of activation. M-loops are ideal when a higher control of root movement is indicated since the beginning of dental retraction in segmented arch mechanics.
author	Muñoz-Rendón,Wilson A Montoya-Goez,Yesid-de-Jesús Gómez-Gil,David F
author_facet	Muñoz-Rendón,Wilson A Montoya-Goez,Yesid-de-Jesús Gómez-Gil,David F
author_sort	Muñoz-Rendón,Wilson A
title	M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch Mechanics
title_short	M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch Mechanics
title_full	M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch Mechanics
title_fullStr	M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch Mechanics
title_full_unstemmed	M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch Mechanics
title_sort	m/f changes after t-loop upper horizontal bending in segmented arch mechanics
publisher	Universidad de La Frontera. Facultad de Medicina
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2016000200022
work_keys_str_mv	AT munozrendonwilsona mfchangesaftertloopupperhorizontalbendinginsegmentedarchmechanics AT montoyagoezyesiddejesus mfchangesaftertloopupperhorizontalbendinginsegmentedarchmechanics AT gomezgildavidf mfchangesaftertloopupperhorizontalbendinginsegmentedarchmechanics
_version_	1714203982726955008

M/F Changes after T-loop Upper Horizontal Bending in Segmented Arch Mechanics

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