Garcia Fernanda C P, Almeida Júlio C F, Osorio Raquel, Carvalho Ricardo M, Toledano Manuel
Faculty of Ceilândia, University of Brasilia-UnB, Ceilândia-DF, Brazil.
J Dent. 2009 Apr;37(4):315-20. doi: 10.1016/j.jdent.2008.12.007. Epub 2009 Feb 8.
To evaluate the bond strength (microTBS) of self-etching adhesives in different solvent evaporation conditions.
Flat dentine surfaces from extracted human third molars were bonded with: (1) 2 two-steps self-etching adhesives (Clearfil SE Bond-CSEB); (Protect Bond-PB) and (2) 2 one-step self-etch systems (Adper Prompt L Pop-ADPLP); (Xeno III-XIII). Bonded dentine surfaces were air-dried for 5s, 20s, 30s or 40s at either 21 degrees C or 38 degrees C. Composite build-ups were constructed incrementally. After storage in water for 24h at 37 degrees C, the specimens were prepared for microtensile bond strength testing. Data were analyzed by two-way ANOVA and Student-Newman-Keuls at alpha=0.05.
CSEB and PB performed better at warm temperature with only 20s of air-blowing. The bond strength increased when XIII was performed at warm temperature at 40s air-blowing. Extended air-blowing not affect the performance of ADPLP, except at 30s air-blowing time at warm temperature.
The use of a warm air-dry stream seems to be a clinical tool to improve the bond strength to self-etching adhesives.
