GC EUROPE G-aenial Bond - Manual (Page 26)

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24 h 20 000TC 24 h 20 000 TC
Etch (-) Etch (+)
Shear bond strength (MPa)
G-ænial Bond Technical Manual
Shear bond strength to enamel
Tests performed by GC R&D, Japan
the purpose of the following study was to assess the adhesion properties of G-ænial Bond with
and without phosphoric acid etching (aet). the resulting shear bond strength (SBS) tests were
conducted at 24 hours and after 2000 cycles of thermocycling.
Test set-up: Bovine enamel specimens were polished with 320-grit Sic paper. For the etch(+) group, etching was conducted
for 10 seconds with a 37% phosphoric acid etching gel (link master etchant, Gc). no etching agent was apply to the etch (-)
surfaces. G-ænial Bond was then applied to the surfaces of the etch (+) and etch (-) groups according to the manufacturer’s
instructions. Clearfil AP-X (Kuraray) was placed on the surface using an Ultradent mould (D=2.38mm) and light-cured. The
specimens were stored in 37°C water for 24 hours. The thermocycling specimens were subjected to thermocycling (5°C-55°C
and 20,000 cycles) after water storage. Shear bond strength (SBS) was measured at a cross-head speed of 1 mm/min. the
statistical analysis was conducted using the tukey test (P<0.05).
Figure 22: influence of etching on shear bond strength to enamel. Source: Gc corporation, Japan, 2009
Shear bond strengths (SBSs) to enamel increased with phosphoric acid etching.
Phosphoric acid etching (AET) improved the bond strength of G-ænial Bond to enamel.
however, after thermocycling, there were no significant differences in the bonding values.
influence of etching on shear bond strength to enamel