الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
The aim of the present study was to investigate the effect of zirconia core color and surface treatments on the shear bond strength to layered porcelain. The following zirconia core colors were assessed: a- white b- yellow. And the following surface treatments were evaluated: 1- airborne particle abrasion 2- selective infiltration etching.