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Influência de diferentes protocolos de silanização na resistência adesiva entre cerâmica feldspática e resina composta comercial
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Advisor(s)
Abstract(s)
Objetivo: Avaliar, in vitro, a resistência adesiva da interface cerâmica-resina
(cerâmica feldspática), em resposta a diferentes agentes de silanização e diferentes
tempos de aplicação dos mesmos.
Materiais e métodos: Três blocos de cerâmica feldspática, retangulares,
VITABLOCSâ Mark II foram divididos em duas partes iguais, obtendo-se um total 6
amostras, aleatoriamente divididas em 3 grupos. Para cada um desses 3 grupos foi
selecionado um silano diferente: G1 Bis-Silane (Bisco, Schaumburg, IL, USA); G2 ESPE
Sil Silane Coupling Agent (3M ESPE AG, Seefeld, Germany) e G3 Monobond Plus
(Ivoclar-Vivadent, Schaan, Liechtenstein) e dois tempos de aplicação do mesmo: T1
(60s) ou T2 (300s). Foi efetuado o condicionamento das amostras (ácido hidrofluorídrico,
descontaminação, ácido ortofosfórico e banho de ultrassons). De seguida foi realizada a
silanização, aquecimento, aplicação o adesivo e incrementação e fotopolimerização da
resina composta. As amostras foram seccionadas em micro spécimens (1±0,2mm2) e
testadas em tração (0,5mm/min), até ocorrer a sua fratura. Os resultados de resistência
adesiva obtidos, foram analisados com recurso aos testes ANOVA two-way, a um nível
de significância de 5% (SPSS24.0).
Resultados: Enquanto fatores isolados, tanto o tipo de silano (p<0,001;
h2=0,076), como o tempo de aplicação do mesmo (p=0,001; h2=0,043), tiveram
influência estatisticamente significativa nos valores de resistência adesiva. A interação
dos dois fatores também apresentou influência estatisticamente significativa (p=0,001;
h2=0,053). Para o tempo de aplicação de 60s e de 300s, o Monobond Plus (17,7 ± 8,87
MPa) apresentou os melhores valores de resistência adesiva.
Conclusão: O agente de silanização, o tempo de condicionamento da superfície
cerâmica e a interação entre estes dois fatores, têm influência na resistência adesiva entre a resina composta e a cerâmica feldspática. O tipo de silano é a variável com maior influência nos valores de resistência adesiva.
Objectives: To assess, in vitro, the bond strength of the ceramic (feldspathic ceramic)-resin adhesive interface, in response to different commercial silane coupling agents and different application times. Materials and Methods: Three feldspathic reinforced glass ceramic blocks, rectangular, VITABLOCSâ Mark II were divided into two equal parts using a hard tissue microtome Accutom-50 (Struers A/S, Ballerup, Denmark). Of the samples obtained, 6 were divided into 3 groups according to the silane used: G1 BIS-Silane (Bisco, Schaumburg, IL, USA); G2 ESPE Sil Silane Coupling Agent (3M ESPE AG, Seefeld, Germany); G3 Monobond Plus (Ivoclar-Vivadent, Schaan, Liechtenstein). Each one was then divided into two subgroups, according to the application time: T1 (60s) or T2 (300s). The samples were conditioned (hydrofluoridic acid, decontamination, orthophosphoric acid and ultrasonic bath). Then, the silanization, heating, adhesive application, the resin adhesion and the light curing of the samples were carried out. The samples were all sectioned into micro specimens (1±0.2mm2) and tested in tension (0.5mm/min), until they fractured. Data were treated using a two-way ANOVA test at a significance level of 5% (SPSS24.0). Results: As an isolated factor, the silane type (p <0.001, h2 = 0.076) and its application time (p = 0.001; h2 = 0.043) had a statistically significant influence on bond strength values. The interaction of the two factors also had a statistically significant influence (p = 0.001, h2 = 0.053). For the application time of 60s and 300s, the Monobond Plus (17.7 ± 8.87 MPa) had the highest bond strength value. Conclusion: The silane coupling agent, the application time, and the interaction between these two factors, have an influence on the bond strength between the composite resin and the feldspathic ceramic. The silane type is the variable with the greatest influence on the bond strength values.
Objectives: To assess, in vitro, the bond strength of the ceramic (feldspathic ceramic)-resin adhesive interface, in response to different commercial silane coupling agents and different application times. Materials and Methods: Three feldspathic reinforced glass ceramic blocks, rectangular, VITABLOCSâ Mark II were divided into two equal parts using a hard tissue microtome Accutom-50 (Struers A/S, Ballerup, Denmark). Of the samples obtained, 6 were divided into 3 groups according to the silane used: G1 BIS-Silane (Bisco, Schaumburg, IL, USA); G2 ESPE Sil Silane Coupling Agent (3M ESPE AG, Seefeld, Germany); G3 Monobond Plus (Ivoclar-Vivadent, Schaan, Liechtenstein). Each one was then divided into two subgroups, according to the application time: T1 (60s) or T2 (300s). The samples were conditioned (hydrofluoridic acid, decontamination, orthophosphoric acid and ultrasonic bath). Then, the silanization, heating, adhesive application, the resin adhesion and the light curing of the samples were carried out. The samples were all sectioned into micro specimens (1±0.2mm2) and tested in tension (0.5mm/min), until they fractured. Data were treated using a two-way ANOVA test at a significance level of 5% (SPSS24.0). Results: As an isolated factor, the silane type (p <0.001, h2 = 0.076) and its application time (p = 0.001; h2 = 0.043) had a statistically significant influence on bond strength values. The interaction of the two factors also had a statistically significant influence (p = 0.001, h2 = 0.053). For the application time of 60s and 300s, the Monobond Plus (17.7 ± 8.87 MPa) had the highest bond strength value. Conclusion: The silane coupling agent, the application time, and the interaction between these two factors, have an influence on the bond strength between the composite resin and the feldspathic ceramic. The silane type is the variable with the greatest influence on the bond strength values.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Resistência adesiva Silano Cerâmica feldspática Resina composta