الفهرس 
Behavior of shear bond strength of bio-active cement on hybrid ceramic CAD/CAM restoration compared to self-adhesive resin cement / in vitro study
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Abstract
Aim: Is to evaluate the Shear bond strength of bioactive cement (Ceramir® Crown & Bridge (C&B))
on hybrid ceramic CAD/CAM restoration compared to self-adhesive resin cement.
Methodology:
o A total of fourteen specimens were prepared from Cerasmart CAD/CAM block A2
shade and cut in square shape (14X12X1.5) mm by low speed diamond saw
isomet 4000 with water coolant.
o One surface of all the specimens will be treated by sandblasting using 50 microns
aluminum-oxide powder according to the manufacturer‟s instructions for the
respective ceramic block material.
o Each Cerasmart specimen received one resin cylinder Irise of polyethylene tube
having 2.5 mm diameter and 1.5 mm height were positioned over the plate surface
and filled with cement, creating cement cylinder having the same dimensions .
o half of these specimen cemented by self adhesive resin (RelyXUnicem) dental luting
cement and the rest cemented by bioactive ( ceramir ) dental cement.
o Polyethylene irises were removed after 24 hours to ensure a complete polymerization
of the dual- cured resin cement.
o finally ,the sample will be tested for shear bond strength using universal machine,
Shearing test was done by compressive mode of load applied at ceramic-cement
interface using a mono-bevelled chisel shaped metallic rod attached to the upper
movable compartment of universal testing machine traveling at cross-head speed of
0.5 mm/min. The load required to debonding was recorded in Newton.