| Summary: | A packable composite resin is a dimetacrylate resin which has a high filler
volume, causing high viscosity, and low wetting ability. So it needs another material
such as flowable composite resin as an intermediate layer. Flowable composite resin
has a low filler volume filler material that causes low viscosity, high wetting ability,
and high flow ability, so that it can fill the space on cavity base. Composite resin can
not bind with the hard tissue of teeth chemically, therefore it needs bonding agent.
Total-etch bonding uses separate etching agent, and has a high binding to the dentine
until 25 MPa, on the other hand self-adhesive flowable is flowable composite resin
that uses etch, primer, and adhesive in on pack flowable. The aim of this study was to
know the differences of shear bond strength adhesion of packable composite resin
with intermediate layer of a flowable composite resin used to a total-etch bonding and
a self-adhesive flowable.
The study used 20 premolar teeth. The teeth were divided in two groups, A
and B based on the restoration technique. Group A is a packable composite resin with
intermediate layer flowable composite resin and a total-etch bonding in base layer,
and group B was packable composite resin with self-adhesive flowable in base layer.
The next step was soaking of the objects in artificial saliva pH 6.8, then keeping in an
incubator at 37oC for 24 hours, then conducting thermocycling at 4oC and 55oC for 1
minute over 25 times, then drying, and testing the shear bond strength by using a
Universal Testing Machine.
The t test result of this study showed that there was a significant difference
between the groups (p=0.000) (p<0.05). The study concluded that the shear bond
strength of flowable composite resin intermediate layer with total-etch bonding was greater than the self-adhesive flowable
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