Effect of HEMA Phosphate as an Alternative to Phosphoric Acid for Dentin Treatment Prior to Hybridization with Etch-and-Rinse Adhesive Systems.
J Adhes Dent
; 18(5): 425-434, 2016.
Article
em En
| MEDLINE
| ID: mdl-27669634
ABSTRACT
PURPOSE:
To evaluate the effect of dentin treatment using HEMA phosphate (HEMA-P) on the microtensile bond strength (µTBS) and nanoleakage of an etch-and-rinse adhesive system. MATERIALS ANDMETHODS:
The occlusal surfaces of human molars were wet ground until superficial dentin was exposed. The specimens were then assigned to two groups according to dentin treatment PA 37% H3PO4 for 15 s; or HP HEMA-P for 15 s. Adper Single Bond 2 was applied to the treated dentin surfaces and resin composite buildups were incrementally constructed over them. After 24-h storage in artificial saliva at 37°C, the bonded teeth were cut into resin-dentin sticks with a cross-sectional area of 1 mm², which were submitted to µTBS testing immediately or after 3 months of storage in artificial saliva at 37°C. Nanoleakage was assessed using SEM/EDS, and the interaction between dentin and H3PO4 or HEMA-P was evaluated by combining micro-Raman and FT-IR spectroscopy. The data were analyzed using two-way ANOVA and Tukey's HSD post-hoc test (α = 0.05).RESULTS:
HP presented significantly higher µTBS than PA at both times (p < 0.05). Both treatments maintained µTBS stability after 3 months of artificial saliva storage (p > 0.005). At both times, PA presented higher nanoleakage than HP (p < 0.05).CONCLUSIONS:
Both dentin treatments maintained µTBS stability after 3 months of artificial saliva storage. The use of HEMA-P was associated with less nanoleakage than was traditional phosphoric-acid etching.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Colagem Dentária
/
Cimentos Dentários
/
Dentina
/
Corrosão Dentária
/
Metacrilatos
Limite:
Humans
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article