Orthodontic Wires
Mostrando 13-24 de 44 artigos, teses e dissertações.
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13. Degradation of orthodontic wires under simulated cariogenic and erosive conditions
This study examined the effect of cariogenic and erosive challenges (CCs and ECs, respectively) on the degradation of copper-nickel-titanium (CuNiTi) orthodontic wires. Sixty wire segments were divided into four treatment groups and exposed to CCs, ECs, artificial saliva, or dry storage (no-treatment control). CC and EC were simulated using a demineralizing
Braz. oral res.. Publicado em: 04/08/2014
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14. Physical and chemical properties of orthodontic brackets after 12 and 24 months: in situ study
Objective: The aim of this article was to assess how intraoral biodegradation influenced the surface characteristics and friction levels of metallic brackets used during 12 and 24 months of orthodontic treatment and also to compare the static friction generated in these brackets with four different methods of the ligation of orthodontic wires. Material an
J. Appl. Oral Sci.. Publicado em: 2014-06
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15. Mechanical properties of NiTi and CuNiTi wires used in orthodontic treatment. Part 2: Microscopic surface appraisal and metallurgical characteristics
OBJETIVO: objetivou-se nessa pesquisa comparar as composições químicas qualitativas e as morfologias das superfícies e das regiões de fratura, após ensaios de tração, de oito tipos de fios de NiTi superelásticos e termoativados convencionais (GAC, TP, Ormco, Masel, Morelli e Unitek) aos fios com adição de cobre (CuNiTi 27°C e 35°C, da Ormco).
Dental Press J. Orthod.. Publicado em: 2014-01
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16. Relationship between friction force and orthodontic force at the leveling stage using a coated wire
The relationship between orthodontic force and friction produced from an archwire and brackets affects the sliding of the wire in the leveling stage. Objective: The purpose of this study was to evaluate the relationship between force and friction in a small esthetic nickel-titanium (Ni-Ti) wire. Material and Methods: Five esthetic wires (three coated a
J. Appl. Oral Sci.. Publicado em: 2013-12
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17. Clinical evaluation of dental alignment and leveling with three different types of orthodontic wires
INTRODUÇÃO: uma grande variedade de fios ortodônticos, compostos por diferentes ligas, está disponível para utilização ortodôntica, podendo gerar respostas clínicas diversas, durante a movimentação dentária. OBJETIVO: este trabalho visa a avaliar o alinhamento e nivelamento das arcadas dentárias inferiores, após a utilização de três tipos de
Dental Press J. Orthod.. Publicado em: 2013-12
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18. Mechanical properties of NiTi and CuNiTi shape-memory wires used in orthodontic treatment. Part 1: stress-strain tests
OBJETIVO: o objetivo dessa pesquisa foi comparar, por meio de ensaios de tração, oito tipos de fios de NiTi superelásticos e termoativados, de seis empresas comerciais (GAC, TP, Ormco, Masel, Morelli e Unitek) àqueles com adição de cobre (CuNiTi 27ºC e 35ºC, da ORMCO). MÉTODOS: os ensaios foram realizados em máquina de ensaios mecânicos, da marca
Dental Press J. Orthod.. Publicado em: 2013-08
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19. Comparison of static friction with self-ligating, modified slot design and conventional brackets
OBJECTIVE: To compare the static frictional forces generated at the bracket/wire interface of stainless steel brackets with different geometries and angulations, combined with orthodontic wires of different diameters. MATERIAL AND METHODS: The frictional forces were evaluated with three different types of metal brackets: a passive self-ligating (SmartCl
J. Appl. Oral Sci.. Publicado em: 2013-07
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20. Assessment of the dimensions and surface characteristics of orthodontic wires and bracket slots
OBJETIVO: o objetivo desse estudo é avaliar as dimensões e as características superficiais de fios retangulares e slots de braquetes de diferentes marcas comerciais. MÉTODOS: trinta braquetes metálicos (0,022" x 0,028" e 0,022" x 0,030") foram divididos em três grupos: Grupo DYN/3M = Dyna-Lock, 3M/Unitek, aço inoxidável (AI); Grupo STD/MO = Slim More
Dental Press J. Orthod.. Publicado em: 2013-04
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21. Interferência dos artefatos de imagem causados por acessórios ortodônticos metálicos em sobreposições de imagens de TCFC / Influence of streaking artifacts due to metallic orthodontic accessories in CBCT 3D model superimposition
The aim of this study was to determine whether the artifacts caused by orthodontic metallic accessories interfere with the accuracy of three-dimensional (3D) Cone Beam Computed Tomography (CBCT) model superimposition. Ten dry human skulls were subjected to 3 CBCT scans: without orthodontic brackets (T1), with stainless steel brackets bonded (T2) and with ort
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/07/2012
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22. Avaliação da deflexão elástica de fios ortodônticos de níquel-titânio, calibre 0,014 / Load-deflection study of caliber 0.014 nickel-titanium orthodontic wires
OBJECTIVE: The purpose of this study was to present the magnitude and the constancy of the forces released by nickel-titanium orthodontic wires, used to treat dental crowding. Another purpose was to compare the most usual types of bending tests used to evaluate these wires: 3-point test and clinical simulation device. MATERIAL AND METHODS: Eleven groups of o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/07/2012
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23. Corrosion evaluation of orthodontic wires in artificial saliva solutions by using response surface methodology
In the present work, stainless steel and Ni-Ti commercial orthodontic wires were immersed in artificial saliva solutions, containing or not F- ions, in different pH values, during 30 days. The weight loss and the Ni2+ content in the solutions at 15 and 30 days of exposition were evaluated using a composite design 2³ and response surface methodology. The ope
Mat. Res.. Publicado em: 11/12/2012
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24. Hausdorff Distance evaluation of orthodontic accessories' streaking artifacts in 3D model superimposition
The aim of this study was to determine whether image artifacts caused by orthodontic metal accessories interfere with the accuracy of 3D CBCT model superimposition. A human dry skull was subjected three times to a CBCT scan: at first without orthodontic brackets (T1), then with stainless steel brackets bonded without (T2) and with orthodontic arch wires (T3)
Braz. oral res.. Publicado em: 2012-10