GC EUROPE G-aenial Bond - Manual (Page 18)

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Self-etch approach Etch and rinse approach
Shear bond strength (MPa)
G-ænial Bond Technical Manual
Shear Bond Strength to Dentine
Tests performed by M. Derbanne, S. Le Goff and M. Degrange†, Paris, France
another in vitro study conducted by mathieu Derbanne, Stéphane le Goff and Michel Degrange†,
university of Paris Descartes, France, evaluated the early bond strength to dentine of G-ænial Bond
using either the self-etch or the etch-and-rinse technique.
Test set-up: Samples were prepared from human 3rd molars and split into 2 groups. In the self-etch group (SES, n=30), GBA
400 (commercially available under the brand name G-ænial Bond) was applied directly to the dentine surface as described in
the table below. In the etch-and-rinse group (E&R, n=30), the dentine surface was first etched with a 37.5% phosphoric acid gel
(Gel Etchant, Kerr) for 15 seconds prior to the application of G-ænial Bond as described in the table below. Three composites
were used in 10 samples of each group: Kalore (GC), G-ænial (GC) and Z100 (3M ESPE). The composites used were placed in
two layers of less than 2 mm each and light-cured for 20 seconds by layer (BluePhase 2 (Kerr Hawe), light intensity >1300
mW.cm-2). The samples were then stored at 37°C in water for 24 hours, after which the shear test was performed at a speed of
0.5 mm.min-1.
technique etching Rinsing & drying air drying application Waiting air drying light-curing
Self-etch / / light apply + brush 15 s 10 s 5 s 5 s
etch-and-rinse 15 s 30 s light apply + brush 15 s 10 s 5 s 5 s
Figure 13: early shear bond strength to dentine using the self-etch and etch-and-rinse techniques.
the chart below represents pooled results with all three tested composites. Source: adapted excerpt from Prof. m. Degrange†,
univeristy Paris Descartes, France, 2010
Statistical analysis (anOVa 1) shows that there is no significant difference (p = 0.65) between the
two methods (self-etching and etch-and-rinse) with respect to the adhesion to dentine (Figure 13).
Shear bond strength to dentine (mpa)