Curvature versus V-bends in a group B titanium T-loop spring
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.2319/030207-109.1 http://hdl.handle.net/11449/41966 |
Resumo: | Objective: To compare the system of forces acting on curvature and preactivated V-bends in titanium T-loop springs (TTLSs) made of 0.017- X 0.025-inch TMA (titanium molibdenium alloy) wire.Materials and Methods: Pictures of TTLSs preactivated by curvature and V-bends were inserted in the LOOP software program to design both TTLSs. Symmetry was assured using the program. Both TTLSs used the same amount (length) of wire and had the same angulation between their anterior and posterior extremities when passive. The loops were activated 7 mm, and forces and moments were registered after each 0.5 mm of deactivation. The brackets were at the same height, separated by 23 mm and angulated 0 degrees.Results: The preactivated curvature TTLS delivered horizontal forces ranging from 34 gF to 456 gF, while the TTLS preactivated by V-bends delivered forces ranging from 54 gF to 517 gF. The forces decreased more (30 gF vs 33 gF) with every 0.5 mm of activation on the preactivated V-bend TTLS than on the preactivated curvature TTLS. Vertical forces were low and clinically insignificant for both TTLSs. The moment to force (MF) ratios were systematically higher on the preactivated curvature than on the preactivated V-bend TTLS (from 5.8 mm to 38.8 mm vs 4.7 mm to 28.3 mm).Conclusions: Although both loops show symmetrical moments in their anterior and posterior extremities and can be used for group B anchorage, the curvature preactivated TTLS delivers lower horizontal forces and higher MF ratios than the acute preactivated V-bend TTLS. |
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Repositório Institucional da UNESP |
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2946 |
spelling |
Curvature versus V-bends in a group B titanium T-loop springT-loopsmoment to force ratiosgroup B anchorageTMAloop softwareObjective: To compare the system of forces acting on curvature and preactivated V-bends in titanium T-loop springs (TTLSs) made of 0.017- X 0.025-inch TMA (titanium molibdenium alloy) wire.Materials and Methods: Pictures of TTLSs preactivated by curvature and V-bends were inserted in the LOOP software program to design both TTLSs. Symmetry was assured using the program. Both TTLSs used the same amount (length) of wire and had the same angulation between their anterior and posterior extremities when passive. The loops were activated 7 mm, and forces and moments were registered after each 0.5 mm of deactivation. The brackets were at the same height, separated by 23 mm and angulated 0 degrees.Results: The preactivated curvature TTLS delivered horizontal forces ranging from 34 gF to 456 gF, while the TTLS preactivated by V-bends delivered forces ranging from 54 gF to 517 gF. The forces decreased more (30 gF vs 33 gF) with every 0.5 mm of activation on the preactivated V-bend TTLS than on the preactivated curvature TTLS. Vertical forces were low and clinically insignificant for both TTLSs. The moment to force (MF) ratios were systematically higher on the preactivated curvature than on the preactivated V-bend TTLS (from 5.8 mm to 38.8 mm vs 4.7 mm to 28.3 mm).Conclusions: Although both loops show symmetrical moments in their anterior and posterior extremities and can be used for group B anchorage, the curvature preactivated TTLS delivers lower horizontal forces and higher MF ratios than the acute preactivated V-bend TTLS.Univ Estadual Paulista, Fac Odontol & Araraquara, BR-14801320 São Paulo, BrazilDept Baylor Coll Dent, Dallas, TX USAIndiana Univ, Sch Dent, Biomech Lab, Bloomington, IN 47405 USAPurdue Sch Engn & Technol, Indianapolis, IN USAUniv Estadual Paulista, Fac Odontol & Araraquara, BR-14801320 São Paulo, BrazilE H Angle Education Research Foundation, IncUniversidade Estadual Paulista (Unesp)Dept Baylor Coll DentIndiana UniversityPurdue Sch Engn & TechnolMartins, Renato Parsekian [UNESP]Buschang, Peter H.Viecilli, Rodrigodos Santos-Pinto, Ary [UNESP]2014-05-20T15:33:18Z2014-05-20T15:33:18Z2008-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article517-523http://dx.doi.org/10.2319/030207-109.1Angle Orthodontist. Newton N: E H Angle Education Research Foundation, Inc, v. 78, n. 3, p. 517-523, 2008.0003-3219http://hdl.handle.net/11449/4196610.2319/030207-109.1WOS:000255305600021Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAngle Orthodontist1.5921,267info:eu-repo/semantics/openAccess2021-10-23T11:51:41Zoai:repositorio.unesp.br:11449/41966Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T11:51:41Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Curvature versus V-bends in a group B titanium T-loop spring |
title |
Curvature versus V-bends in a group B titanium T-loop spring |
spellingShingle |
Curvature versus V-bends in a group B titanium T-loop spring Martins, Renato Parsekian [UNESP] T-loops moment to force ratios group B anchorage TMA loop software |
title_short |
Curvature versus V-bends in a group B titanium T-loop spring |
title_full |
Curvature versus V-bends in a group B titanium T-loop spring |
title_fullStr |
Curvature versus V-bends in a group B titanium T-loop spring |
title_full_unstemmed |
Curvature versus V-bends in a group B titanium T-loop spring |
title_sort |
Curvature versus V-bends in a group B titanium T-loop spring |
author |
Martins, Renato Parsekian [UNESP] |
author_facet |
Martins, Renato Parsekian [UNESP] Buschang, Peter H. Viecilli, Rodrigo dos Santos-Pinto, Ary [UNESP] |
author_role |
author |
author2 |
Buschang, Peter H. Viecilli, Rodrigo dos Santos-Pinto, Ary [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Dept Baylor Coll Dent Indiana University Purdue Sch Engn & Technol |
dc.contributor.author.fl_str_mv |
Martins, Renato Parsekian [UNESP] Buschang, Peter H. Viecilli, Rodrigo dos Santos-Pinto, Ary [UNESP] |
dc.subject.por.fl_str_mv |
T-loops moment to force ratios group B anchorage TMA loop software |
topic |
T-loops moment to force ratios group B anchorage TMA loop software |
description |
Objective: To compare the system of forces acting on curvature and preactivated V-bends in titanium T-loop springs (TTLSs) made of 0.017- X 0.025-inch TMA (titanium molibdenium alloy) wire.Materials and Methods: Pictures of TTLSs preactivated by curvature and V-bends were inserted in the LOOP software program to design both TTLSs. Symmetry was assured using the program. Both TTLSs used the same amount (length) of wire and had the same angulation between their anterior and posterior extremities when passive. The loops were activated 7 mm, and forces and moments were registered after each 0.5 mm of deactivation. The brackets were at the same height, separated by 23 mm and angulated 0 degrees.Results: The preactivated curvature TTLS delivered horizontal forces ranging from 34 gF to 456 gF, while the TTLS preactivated by V-bends delivered forces ranging from 54 gF to 517 gF. The forces decreased more (30 gF vs 33 gF) with every 0.5 mm of activation on the preactivated V-bend TTLS than on the preactivated curvature TTLS. Vertical forces were low and clinically insignificant for both TTLSs. The moment to force (MF) ratios were systematically higher on the preactivated curvature than on the preactivated V-bend TTLS (from 5.8 mm to 38.8 mm vs 4.7 mm to 28.3 mm).Conclusions: Although both loops show symmetrical moments in their anterior and posterior extremities and can be used for group B anchorage, the curvature preactivated TTLS delivers lower horizontal forces and higher MF ratios than the acute preactivated V-bend TTLS. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-05-01 2014-05-20T15:33:18Z 2014-05-20T15:33:18Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.2319/030207-109.1 Angle Orthodontist. Newton N: E H Angle Education Research Foundation, Inc, v. 78, n. 3, p. 517-523, 2008. 0003-3219 http://hdl.handle.net/11449/41966 10.2319/030207-109.1 WOS:000255305600021 |
url |
http://dx.doi.org/10.2319/030207-109.1 http://hdl.handle.net/11449/41966 |
identifier_str_mv |
Angle Orthodontist. Newton N: E H Angle Education Research Foundation, Inc, v. 78, n. 3, p. 517-523, 2008. 0003-3219 10.2319/030207-109.1 WOS:000255305600021 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Angle Orthodontist 1.592 1,267 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
517-523 |
dc.publisher.none.fl_str_mv |
E H Angle Education Research Foundation, Inc |
publisher.none.fl_str_mv |
E H Angle Education Research Foundation, Inc |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964445357637632 |