Bonding brackets to porcelain: in vitro study

Sant’Anna, Eduardo Franzotti; Monnerat, Maria Evangelina; Chevitarese, Orlando; Stuani, Maria Bernadete Sasso

doi:10.1590/s0103-64402002000300010

Cited by 30 publications

(50 citation statements)

References 16 publications

(21 reference statements)

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“…Although clinicians should follow the manufacturers' recommendations for bonding procedures, a 60 s etching time for bonding to feldspathic ceramic might be recommended. However, care should be taken when selecting the etching time for each substrate, as previous studies have shown negative effects of over-etching ceramics, such as difficult penetration of the bonding agent into the irregularities and possible cohesive failure of the substrate (1)(2)(3)(4)19,20). On the other hand, although the light source presented …”

Section: Discussionmentioning

confidence: 99%

Effect of etching time and light source on the bond strength of metallic brackets to ceramic

et al. 2011

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This study evaluated the bond strength of brackets to ceramic testing different etching times and light sources for photo-activation of the bonding agent. Cylinders of feldspathic ceramic were etched with 10% hydrofluoric acid for 20 or 60 s. After application of silane on the ceramic surface, metallic brackets were bonded to the cylinders using Transbond XT (3M Unitek). The specimens for each etching time were assigned to 4 groups (n=15), according to the light source: XL2500 halogen light, UltraLume 5 LED, AccuCure 3000 argon laser, and Apollo 95E plasma arc. Light-activation was carried out with total exposure times of 40, 40, 20 and 12 s, respectively. Shear strength testing was carried out after 24 h. The adhesive remnant index (ARI) was evaluated under magnification. Data were subjected to two-way ANOVA and Tukey's test (α=0.05). Specimens etched for 20 s presented significantly lower bond strength (p<0.05) compared with those etched for 60 s. No significant differences (p>0.05) were detected among the light sources. The ARI showed a predominance of scores 0 in all groups, with an increase in scores 1, 2 and 3 for the 60 s time. In conclusion, only the etching time had significant influence on the bond strength of brackets to ceramic.

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Section: Discussionmentioning

confidence: 99%

Effect of etching time and light source on the bond strength of metallic brackets to ceramic

et al. 2011

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“…The use of 50-μm aluminum oxide particle stream has been recommended for bracket recycling to increase retention by creating a roughened surface (18,19). In the present study, bracket blasting was done using the aluminum oxide particle size (90 μm) indicated in the instructions for use supplied by the manufacturer of the air-abrasion device.…”

Section: Discussionmentioning

confidence: 99%

Shear bond strength of new and recycled brackets to enamel

et al. 2006

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The purpose of this study was to evaluate in vitro the shear bond strength of recycled orthodontic brackets. S2C-03Z brackets (Dental Morelli, Brazil) were bonded to the buccal surfaces of 50 extracted human premolars using Concise Orthodontic chemically cured composite resin (3M, USA). The teeth were randomly assigned to 5 groups (n=10), as follows. In group I (control), the bonded brackets remained attached until shear testing (i.e., no debonding/rebonding). In groups II, III and IV, the bonded brackets were detached and rebonded after recycling by 90-μm particle aluminum oxide blasting, silicon carbide stone grinding or an industrial process at a specialized contractor company (Abzil-Lancer, Brazil), respectively. In group V, the bonded brackets were removed and new brackets were bonded to the enamel surface. Shear bond strength was tested in an Instron machine at a crosshead speed of 0.5 mm/min. Data were analyzed statistically by ANOVA and Tukey's test at 5% significance level. There was no statistically significant difference (p>0.05) between the control brackets (0.52 kgf/mm 2 ), brackets recycled by aluminum oxide blasting (0.34 kgf/mm 2 ) and new brackets attached to previously bonded teeth (0.43 kgf/mm 2 ). Brackets recycled by the specialized company (0.28 kgf/mm 2 ) and those recycled by silicon carbide stone grinding (0.14 kgf/mm 2 ) showed the lowest shear strength means and differed statistically from control brackets (0.52 kgf/ mm 2 ) (p<0.05). In conclusion, the outcomes of this study showed that bracket recycling using 90-μm aluminum oxide particle airabrasion was efficient and technically simple, and might provide cost reduction for orthodontists and patients alike.

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“…Para se colar bráquetes ortodônticos em restaurações cerâmicas é necessário preparar a superfície, removendo ou não o glaze. Já foi demonstrado não haver diferença estatística entre estes dois métodos, sugerindo preservar a superfície glazeada para diminuir os prejuízos à superfície de porcelana que se deseja preservar [25,26]. Analisando a resistência ao cisalhamento neste estudo, onde o glazeamento da superfície foi preservado e obtido de formas diferentes, força de adesão menor foi encontrada quando usada resina fotopolimerizável em superfície auto-glazeada (10,38 ± 4,1 MPa), mas acima da média aceitável na literatura.…”

Section: Discussionunclassified

Interferência dos diferentes glazeamentos na colagem de bráquetes ortodônticos em superfícies cerâmicas

Dalvi

Bolognese

2010

Cerâmica

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Foram avaliadas diferentes formas de glazeamento da superfície de porcelana quanto à resistência ao cisalhamento de bráquetes metálicos colados com diferentes cimentos. Quarenta e dois corpos de prova de metalocerâmica foram confeccionados (2 controles) e divididos em quatro grupos de acordo com o tipo de glazeamento, com camada extra de glaze (G) ou auto-glazeados (AG), e o cimento utilizado, resina fotopolimerizável (r) ou ionômero de vidro resinosos (i), formando os seguintes grupos: Gr, Gi, AGr e AGi com 10 corpos de prova cada grupo. Todas as superfícies dos corpos de prova receberam tratamento com ácido fosfórico 35% por 30 s seguidos de uma camada de silano. Quarenta bráquetes metálicos foram colados. Os corpos de prova foram submetidos a termociclagem e ao teste de resistência ao cisalhamento com uma máquina universal de ensaios mecânicos. Uma amostra de cada grupo após descolagem, remoção da resina e polimento, foi avaliado em microscópio eletrônico de varredura. O índice de fratura coesiva da porcelana foi também avaliado. Os resultados mostram valores acima da média aceitável na literatura para todos os grupos, sendo que o grupo AGr apresentou valor menor (10,38 MPa) e estatisticamente significativo em relação aos demais. A análise no microscópio eletrônico de varredura mostrou que as superfícies, após polimento, não readquirem as características de antes da colagem, apesar de se apresentarem aceitáveis clinicamente. Houve fratura da porcelana em todos os grupos. Conclui-se que é possível se conseguir colagem adequada de bráquetes metálicos em superfícies metalocerâmicas auto-glazeadas e com camada extra de glaze, preservando-o, não necessitando reconhecer previamente a forma de glazeamento.

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Bonding brackets to porcelain: in vitro study

Cited by 30 publications

References 16 publications

Effect of etching time and light source on the bond strength of metallic brackets to ceramic

Effect of etching time and light source on the bond strength of metallic brackets to ceramic

Shear bond strength of new and recycled brackets to enamel

Interferência dos diferentes glazeamentos na colagem de bráquetes ortodônticos em superfícies cerâmicas

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