Abstract: Objectives: Wear assessment of different ceramic restorations placed against different occlusal antagonists. Materials and methods: Sixty ceramic sample discs (13mm in diameter and 2mm in thickness) were divided into two groups; full contour zirconia (Zr) and lithium disilicate press on zirconia substrate (E.max) discs. Sixty antagonists were constructed and subdivided into three subgroups: (1)Discs wearing against extracted teeth. (2) Discs wearing against Porcelain fused to metal crowns (PFMc). (3)Discs wearing against full contour zirconia crowns (Zrc).Sample discs and antagonists were dynamically three-body loaded................
Keywords: Full contour zirconia, Lithium disilicate ceramic, Wear.
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