الفهرس 
Effect of microwave etching on zirconia surface modification
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Abstract
Statement of problem . Although zirconia based all ceramic restorations are now widely used high failure rates due to post chipping of the veneering porcelain has been identified as major technical complication. Purpose the Purpose of this study was to evaluate the fracture resistance of CAD/ CAM Zirconia crownsveneered with different techniques CAD veneering technique with glass joining CAM veneering technique with adhesive resin bonding and conventional layering technique