Conclusions Vertical reduction design of Y-TZP substructure could increase ?E * at the cervical area. Decreasing thickness of Y-TZP substructure may increase ?E * at the body area. Increasing the value of Y-TZP based-all ceramic crown shade could increase ?E * at the body area. Clinical significance The translucency of a Y-TZP based all-ceramic crowns may influence its esthetic outcome when it is used on a discoloured abutment tooth. Clinicians should be aware of the effect of substructure design on the translucency of Y-TZP based all-ceramic crowns. (Source: Journal of Dentistry)
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