Influence of silanes on the stability of resin-ceramic bond strength.

Autor:	Silva DBD; Integrated Clinic, Federal University of Santa Catarina - (UFSC), Santa Catarina, Brazil, djaniels2002@yahoo.com.br., Bruzi G; Operative Dentistry, Federal University of Alfenas (Unifal-MG), Alfenas, Minas Gerais, Brazil., Schmitt BP; Private practice, Florianópolis, Santa Catarina, Brazil., Filho AM; Integrated Clinic, Federal University of Santa Catarina - (UFSC), Santa Catarina, Brazil., Andrada MAC; Operative Dentistry, Federal University of Santa Catarina - (UFSC), Santa Catarina, Brazil.
Jazyk:	angličtina
Zdroj:	American journal of dentistry [Am J Dent] 2019 Apr; Vol. 32 (2), pp. 89-93.
Abstrakt:	Purpose: To evaluate the in vitro stability of resin-ceramic bond strength provided for silanes with acidic functional monomers. Methods: Five ceramic blocks were fabricated. The blocks were randomly divided into groups (n=30) and assigned to the following surface treatments: ( C) HF + RelyX Ceramic Primer, ( G1) HF + Porcelain Liner M, ( G2) HF + Clearfil Ceramic Primer, ( G3) Phosphoric acid ( H₃PO₄) + Clearfil Ceramic Primer, ( G4) H₃PO₄ + Porcelain Liner M. Two adhesives were used: Single Bond in Group C and Clearfil SE Bond in the other groups, after which, each block received four 1 mm increments of resin composite Filtek Z350. The resin-ceramic blocks were sectioned, obtaining samples of approximately 0.8 mm + ࡩ 0.8 mm. The groups were subdivided according to aging mode: I - immediate ( 24 hours storage in artificial saliva) and A - aged ( 3 months in artificial saliva + 5,000 thermal cycles 5°C/55°C). The microtensile test was performed with a 0.5 mm/minute crosshead speed ( n = 15) on a universal testing machine. The fracture patterns were categorized with scanning electron microscopy. The results were analyzed using three-way ANOVA and Tukey's test ( P≤ 0.05). Results: Silanes containing acidic functional monomers did not affect the stability of the resin-ceramic bond strength. The use of HF acid was a necessary condition for stability. The highest values after aging were obtained by silanes with functional molecules without a statistically significant difference. The storage influenced the values of bond strength. The use of acidic functional monomers did not affect the resin-ceramic bond after storage in saliva followed by thermal cycling. Clinical Significance: Silane agents containing acidic functional monomers did not influence the stability of the resin-ceramic bond. The use of hydrofluoric acid is recommended to provide stability of the bonds. Competing Interests: The authors declared no conflict of interest. (Copyright©American Journal of Dentistry.)
Databáze:	MEDLINE
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