Análise in vitro da resistência ao cisalhamento de braquetes metálicos colados em incisivos bovinos e humanos

Romano, Fábio Lourenço; Tavares, Stenyo Wanderley; Ramalli, Edvaldo Luiz; Magnani, Maria Beatriz Borges de Araújo; Noüer, Darcy Flávio

doi:10.1590/s1415-54192004000600010

Cited by 11 publications

(21 citation statements)

References 10 publications

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“…Regarding the post-fixation time, there was no statistical significant difference between 10 minutes and 24 hours tests, except for Transbond Plus Color Change, as observed in other study [21]. Thus, the hypothesis that it would be no influence of postfixation time on SBS values could partially be validated.…”

Section: Discussionmentioning

confidence: 49%

“…The minimum shear bond strength of an adhesive should be between 5.9 and 7.9 MPa to be considered adequate for clinical needs, and at least 4.9 MPa for laboratory studies [20,21]. When the results of this study were compared with these reference values, it was found that all materials evaluated comply with these values, considering both periods.…”

Section: Discussionmentioning

confidence: 78%

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Shear bond strength of brackets bonded with nanofilled flowable resins

Morais

Moresca

Losso

et al. 2016

RSBO

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Introduction and Objective: To evaluate the shear bond strength of brackets fixed with different materials (two light-cured nanofilled low-viscosity resins -Transbond Supreme LV and Flow Tain LV and two light-cured traditional resins -Transbond XT and Transbond Plus Color Change) after 10 min and 24 h, and to evaluate the type of failure. Material and methods: Eighty bovine incisors were selected and randomly divided into groups (n = 10) according to the material and fixation period. The brackets were bonded following the manufacturer's instructions and stored in deionized water at 37 o C for 10 min or 24 h. After, the specimens were submitted to shear bond strength test at 0.5 mm/min and evaluated for adhesive remnant index (ARI). The data were submitted to Kruskal Wallis and Wilcoxon tests (p < 0.05) and the ARI scores to Chi-Square test. Results: There was a significant difference among the materials (p < 0.05) (after 10 min -Transbond XT > Transbond Plus Color Change > Transbond Supreme LV = Flow Tain LV and after 24 h -Transbond XT > Transbond Plus Color Change = Transbond Supreme LV =

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Section: Discussionmentioning

confidence: 49%

Section: Discussionmentioning

confidence: 78%

Shear bond strength of brackets bonded with nanofilled flowable resins

Morais

Moresca

Losso

et al. 2016

RSBO

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“…On the other hand, our results confront studies which reported the majority of disruptions in the interface composite/ bracket. 4,15,16,19,24 After shear bond strength test and during the ARI evaluation enamel fractures were observed in four specimens distributed among the four groups. This relative frequency of fractures among groups, supported by the study by Liu et al, 10 may be associated with high strength supported by the samples.…”

Section: Resultsmentioning

confidence: 99%

“…19 Several bonding materials have been used, including composites which have good resistance, toughness and dimensional stability. 8 Advantages to use light-curing resin in orthodontic procedures include reduced risk of contamination and increased accuracy in positioning the bracket, compared to the use of self-curing resin.…”

Section: Introductionmentioning

confidence: 99%

In vitro analysis of shear bond strength and adhesive remnant index comparing light curing and self-curing composites

Neves

Brandão

Almeida³

et al. 2013

Dental Press J. Orthod.

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Objective: To evaluate, in vitro, the shear bond strength of self-curing (Concise TM -3M and Alpha Plast -DFL) and light-curing composites (Transbond TM XT -3M and Natural Ortho -DFL) used in orthodontics bonding, associated to Morelli metal brackets, with further analysis of adhesive remnant index (ARI) and enamel condition in scanning electron microscopy (SEM). Methods: Forty human premolars, just extracted and stored in physiologic solution 0.9 % were used. Randomly, these samples were divided in four groups: G1 group, the brackets were bonded with Concise TM -3M composite; in G2 group, Alpha Plast -DFL composite was used; in G3 group, Transbond TM XT -3M was used; in G4 group, Natural Ortho -DFL composite was used. These groups were submitted to shear strength tests in universal testing machine, at 0.5 mm per minute speed. Results: Statistical difference between G3 and G4 groups was recorded, as G4 showing higher strength resistance than G3. In the other hand, there were no statistical differences between G1, G2 and G3 and G1, G2 and G4 groups. ARI analysis showed that there was no statistical difference between the groups, and low scores were recorded among then. The scanning electron microscopy (SEM) analysis revealed the debonding spots and the enamel surface integrity. Conclusions: Shear bond strength was satisfactory and similar between the composites, however Natural Ortho -DFL revealed best comparing to Transbond TM XT -3M. Keywords: Composite resins. Shear strength. Scanning electron microscopy.How to cite this article: Neves MG, Brandão GAM, Almeida HA, Brandão AMM, Azevedo DR. In vitro analysis of shear bond strength and adhesive remnant index comparing light-curing and self-curing composites. Dental Press J Orthod. 2013 May-June;18(3):124-9.» The authors report no commercial, proprietary or financial interest in the products or companies described in this article. Objetivo: avaliar in vitro a resistência ao cisalhamento de compósitos autopolimerizáveis (Concise e Alpha Plast) e fotopolimerizáveis (Transbond XT e Natural Ortho) utilizados na colagem de braquetes metálicos da marca Morelli, analisando o índice de adesivo remanescente (ARI) e da integridade da superfície do esmalte por meio de microscopia eletrônica de varredura (MEV). Métodos: foram utilizados 40 pré-molares humanos extraídos. As raízes dos dentes foram incluídas em gesso-pedra especial, no interior de tubos de PVC usados para a confecção dos corpos de prova. Esses corpos de prova foram divididos em quatro grupos: grupo G1, braquetes associados ao compósito Concise; grupo G2, braquetes associados ao compósito Alpha Plast; grupo G3, braquetes associados ao compósito Transbond XT; e grupo G4, braquetes associados ao compósito Natural Ortho. Os grupos foram submetidos ao teste de cisalhamento em máqui-na universal de ensaios, a uma velocidade de 0,5mm por minuto. Resultados: houve diferença estatística entre os grupos G3 e G4, sendo os valores de G4 superiores; no entanto, não foram encontradas diferenças estatisticamente significativa...

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“…A opção por este tipo de dente se deu pela facilidade de obtenção de uma amostra grande com maior homogeneidade quanto à idade dos dentes extraídos (animais com menos de 5 anos de idade) e que tinham um tempo de aproximadamente 1 mês após a extração (ABNT, 2014). Estudos comparando a utilização de dentes bovinos e humanos demonstraram que os incisivos bovinos são substitutos adequados para ensaios de adesão ao esmalte, tanto para avaliação da resistência, em megapascal, quanto para avaliação do índice de remanescente de adesivo (REIS et al, 2004;ROMANO et al, 2004).…”

Section: Discussionunclassified

Influência da erosão dentária na adesão de braquetes ortodônticos colados ao esmalte com diferentes materiais

Machado¹

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Agradeço imensamente pelo privilégio de ser seu orientado e também por ter me ajudado tanto, de diferentes maneiras, em meio à sua rotina tão agitada.Nos anos que tive a oportunidade de lecionarmos juntos em Maringá, aprendi a admirar seu trabalho e competência, associados sempre à maneira delicada e gentil de tratar não só os pequenos pacientes, como a todos em sua volta.Sua dedicação e vibração na profissão são inspiração para a vida acadêmica! À Prof a . Dr a . Maria Aparecida de Andrade Moreira MachadoAgradeço pela maneira contagiante de ensinar Odontologia. Sua energia e disposição, agora como diretora, em elevar sempre o prestígio da FOB-USP tem, cada dia mais, enchido de orgulho os ex-alunos desta casa. Palavras-chave: Erosão dentária. In Vitro. Colagem dentária. À Prof ABSTRACTThe influence of dental erosion on bond strength of orthodontic brackets bonded to enamel with different materialsThe diagnosis of initial erosion lesions on enamel is difficult and in some clinical situations, the professional bonds brackets to eroded surfaces without noting.This in vitro study evaluated the bond strength of orthodontic brackets bonded to eroded and sound bovine enamel with two different materials. The factors under study were enamel condition in two levels (with and without erosion) and type of bonding material in two levels (Transbond® XT and Fuji Ortho LC). The sample consisted of 160 bovine lower incisor teeth, half of the specimens was subjected to erosive challenge to form artificial erosive lesions and the other half remained sound.In the erosive cycling tooth crowns were immerged 8x/day in Coca-cola® (10 min), showing greater amount of material remaining on enamel, in both resin (p=0,04) and ionomer (p<0,001) groups. It was concluded that the presence of erosion lesions did not interfere on shear bond strength of brackets bonded to enamel with composite resin or glass ionomer cement. However, independently of the bonding material, adhesive remnant index showed higher bond strength to eroded enamel.

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Análise in vitro da resistência ao cisalhamento de braquetes metálicos colados em incisivos bovinos e humanos

Cited by 11 publications

References 10 publications

Shear bond strength of brackets bonded with nanofilled flowable resins

Shear bond strength of brackets bonded with nanofilled flowable resins

In vitro analysis of shear bond strength and adhesive remnant index comparing light curing and self-curing composites

Influência da erosão dentária na adesão de braquetes ortodônticos colados ao esmalte com diferentes materiais

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