TY - JOUR ID - TI - Measuring the Shear Bound Strength on Acrylic Resin Veneer to Metal Surface of Nickel (A Comparative Study) AU - Aklas Zeid Abood اخلاص زيد عبود PY - 2016 VL - 4 IS - 2 SP - 141 EP - 148 JO - Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان SN - 20731213 AB - The bound strength of metal resin interface of prosthesis is a keyfactor in determining the service ability of that prosthesis. Themain objective of this study was to determine the effect ofdifferent surface treatment on the shear bond strength of Ni-Cralloy (CB-Blando 72 alloy) and heat cured acrylic veneer resin(Vertex).Thirty disc shaped samples from base plate wax were prepared,the diameter of disc was (8 mm x 4.5 mm). After casting themetal, the samples were cleaned, finished and polished by siliconcarbide abrasive paper with grit size (600 μm) and then theprofilometer was used to determine the surface roughness ofsamples. Then the samples were divided in to three groups, eachgroup contain (10) samples.The first group received no treatment and serve as control .TheSecond group received micro mechanical treatment using 250 μmAl2o3 .The third group recived micro mechanical treatment using400 μm Al2o3. The acrylic was prepared as a round shape (8 μm) indiameter and (2 μm) in thickness, which was placed on the metalsurface treatment, the acrylic was fabricated in the sameconventional way for construction veneer resin. Then all sampleswas tested the shear bond strength by using Instron universaltesting machine .The result from this study showed that, the firstgroup was give low shear bond strength while the second groupshowed that the air abrasion with 250 μm Al2o3 give the highestshear bond values when compared with the third group which airabrasive with 400 μm Al2o3.

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