GC EUROPE G-aenial Bond - Manual (Page 10)

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G-a BF EB OA OF SB+
Shear Bond Strength (MPa)
Enamel Enamel after TC 20000
G-ænial Bond Technical Manual
6.2.2 influence of hema on bond strength over time
in order to assess the long-term durability of the bond and the influence of hema, thermocycling
tests were performed by Gc R&D (2010), comparing the hema-free G-ænial Bond to commercially
available hema-containing adhesive systems.
Test set-up: Bovine enamel and dentine samples were embedded in acrylic resin (unifast iii) and polished with #320-grit Sic
paper. adhesives were applied to the surface according to the respective manufacturer’s recommendations as detailed below
in Table 4. Clearfil AP-X (Kuraray) was placed on the surface using an Ultradent mould (D=2.38 mm) and light-cured for 20
seconds using G-light (GC). The specimens (n=5) were stored in 37°C water for 24 hours, after which the specimens (n=5) were
subjected to thermocycling (5°C-55°C, 20000 cycles). 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).
table 4: tested materials, hema-free or containing hema
code Product name manufacturer application time air drying light-curing hema
G-a G-ænial Bond Gc 10 s strong 5s 5s no
BF Bond Force tokuyama 20 s weak 5 s and moderate 5 s 10 s Yes
eB easy Bond 3m eSPe scrub for 20 s weak 5 s 10 s Yes
Oa OptiBond all-in-One Kerr scrub for 20 s (X2) weak 5 s 10 s Yes
OF OptiBond Fl Kerr etch and scrub for 15 s weak 5 s 10 s Yes
SB+ Single Bond Plus 3m eSPe etch and apply for 15 s (x2) weak 5 s 10 s Yes
Figure 5: Shear bond strength to enamel of the hema-free G-ænial Bond (G-a) in comparison to various hema-containing
bonding materials. Source: Gc corporation, Japan, 2010
the shear bond strength to enamel increased after thermocycling for G-ænial Bond (G-a) and
Optibond Fl (OF). in contrast, the shear bond strength to enamel decreased after thermocycling
for all other hema-containing adhesives.
influence of hema on Shear Bond Strength to enamel