GC EUROPE G-aenial Bond - Manual (Page 17)

17
(MPa) 60
significantly different (p> 0.05)
50
40
30
20
10
0
SELF-ETCH
approach
ETCH & RINSE /
GENTLY DRY BONDING
approach
ETCH & RINSE /
WET BONDING
approach
G-ænial Bond Technical Manual
Within the limitations of this test, G-ænial Bond demonstrates a shear bond strength to dentine
higher or equal to the tested group, with the exception of three bonding systems (Optibond Solo
Plus, adper easy Bond and Optibond all-in-one) which yielded higher results. compared to the
two reference standards in their respective categories (clearfil Se Bond and Optibond Fl), G-ænial
Bond performed equally well. G-ænial Bond demonstrates excellent bonding to dentine using
the self-etch technique.
7.2.2 Quantitative influence of etching on bond strength to dentine
Several studies were conducted internally and externally in order to investigate the potential
influence of etching on bond strength to dentine. the goals were to confirm that etching of dentine
is not necessary when using G-ænial Bond, and to understand what would happen if inadvertent
etching of dentine occurred during the selective etching procedure.
Microtensile Bond Strength to Dentin
Tests performed by Professor van Meerbeek, Leuven, Belgium
in order to assess the effect of etching on bond strength to dentine, microtensile bond tests were
conducted by Professsor van meerbeek, leuven BiOmat Research cluster, Department of
Conservative Dentistry, Katholic University of Leuven (KULeuven), Belgium
Test set-up: Bur-cut dentine surfaces prepared from human molars were partially split in 3 groups (n=45 specimens per group).
One group was first etched with 37.5% phosphoric acid gel (Kerr) for 10 seconds, rinsed and gently dried (the etch-and-rinse
gently dry bonding approach), the second group was first etched with 37.5% phosphoric acid gel (Kerr) for 10 seconds, then
rinsed and the surface was left wet (etch-and-rinse wet bonding approach); in the third group, no etching agent was applied
(the self-etch approach). next, G-ænial Bond was applied strictly following the manufacturer's instructions, after which the
surface was built up using Clearfil AP-X (Kuraray). After storage in water for 24 hours, micro-specimens were prepared with the
interface circularly constricted using a micro-Specimen Former, prior to microtensile bond strength (mPa) measurement.
Figure 12: Tensile bond strength of G-ænial Bond to dentine. Source: Adapted excerpt from Prof. van Meerbeek, KU Leuven,
Belgium, 2010
No statistical difference was observed between the self-etch and the etch-and-rinse treatment
of dentine. the only significant differences observed were between the wet bonding and the
gently dry etch-and-rinse approaches, with higher results obtained with the gently dried specimen.
influence of etching on micro-tensile
Bond Strenght to Dentine