GC EUROPE G-aenial Bond - Manual (Page 25)

25
(MPa) 60
significantly different (p> 0.05)
50
40
30
20
10
0
Self-etch
approach
Selective etching /
Etch and rinse
approach
G-ænial Bond Technical Manual
influence of etching on micro-tensile
Bond Strenght to enamel
7.3.2 influence of etching on bond strength to enamel
While G-ænial Bond demonstrates good bonding values to enamel, etching of the enamel is
preferred if the surface to which the adhesive will be applied consists mainly of enamel rather than
dentin, and particularly if the surface consists of intact (uncut) enamel.
Micro-Tensile Bond Strength to Enamel
Tests performed by Professor van Meerbeek, Leuven, Belgium
in order to assess the effect of phosphoric acid etching (aet) on enamel, the following microtensile
bond strength tests were conducted by Professor van meerbeek, leuven BiOmat Research
Cluster, Department of Conservative Dentistry, Katholic University of Leuven (KULeuven), Belgium
Test set-up: Bur-cut enamel surfaces prepared from human molars were partially split into 2 groups (n=30 specimens per
group). One group was first etched with 37.5% phosphoric acid gel (Kerr) for 10 seconds (selective etch/ etch-and-rinse
approach), while no etching agent was applied to the second group (self-etch approach). next, G-ænial Bond was applied
following the manufacturer's instructions, after which the surface of the samples was built up using Clearfil AP-X (Kuraray). After
storing 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 21: Micro-tensile bond strength of G-ænial Bond to enamel. Source: Adapted excerpt from Prof. van Meerbeek, KU
leuven, Belgium, 2010
a statistically significant difference was found between the bond strength of etched and un-etched
enamel prior to the application of G-ænial Bond, with higher results obtained with the etched
samples.
G-ænial Bond is offering high bond strength to enamel in self etch mode. These results are
enhanced when the selective etching technique is used.