Sistemas adesivos de cura dual em cavidades dentinárias de 4 mm: efeito sobre propriedades físicas de interfaces adesivas
The proper polymerization of adhesive system influences the mechanical properties and longevity of restoration. In deeper restorations, dual cure adhesives may be a viable alternative in pursuit of complete polymerization. Objective: To evaluate the influence of different adhesive strategies on t...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/27492 |
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| Resumo: | The proper polymerization of adhesive system influences the mechanical properties and
longevity of restoration. In deeper restorations, dual cure adhesives may be a viable
alternative in pursuit of complete polymerization. Objective: To evaluate the influence of
different adhesive strategies on the degree of conversion on hybrid layer (DC), bond strength
(BS) and failure pattern (FP) of adhesive interfaces of dental cavities. Methods: A total of
153 bovine incisors (n = 17) were used to create cavities with 4 mm depth and high C-factor
C of magnitude 2.2,which were then restored with the composites Filtek Z250 XT [XT],
Filtek Bulk Fill [FB] and Filtek Bulk Fill Flow [FF] with the adhesives Single Bond Universal
[SB], Adper Scotchbond Multiuso Plus cured [MPf] or without photo-activation [MPd].The
DC analysis was performed in micro Raman, the BS in a universal testing machine and the PF
was done with stereoscopic magnifying glass. Data of DC were analyzed by three-way
analysis of variance (ANOVA) and Tukey test (p<0.05) and data of BS by two-way ANOVA
and Tukey test (p<0.05), while the FP were analyzed through descriptive statistics. Results:
There was no statistically significant difference between top and bottom regions for resin and
adhesive for the DC. There was a statistically significant difference between the adhesives
(p<0.05) for DC and BS. There was a statistically significant difference between the resins
(p<0.05) for the DC and BS. The failure pattern recorded a greater amount of cohesive failure
in the samples. Conclusions: The Adper ™ Scotchbond ™ Multi-Purpose Plus Adhesive
strategies with and without photoactivation increased the degree of conversion and bond
strength compared to self-etch adhesive Single Bond Universal. Moreover, efficient
polymerization of the base of sample assures a good polymerization of the adhesive systems
on the bottom side of 4 mm cavities for restorations with Bulk Fill resins. |
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