The goal of this study is to evaluate the clinical success rate (measured by retention) of endo-crowns fabricated from two hybrid ceramic materials (HC Hard blocks ) versus (Cerasmart) at 6, 12, and 18 months.
Secondary Objectives are:
1. To compare the incidence of restoration failures between the two materials
2. To assess marginal adaptation and marginal discoloration over time
3. To evaluate wear of opposing enamel quantitatively
4. To compare surface texture, color match, and luster between materials
5. To determine patient satisfaction with both types of restorations It will be a randomized, controlled, double-blind clinical trial with 1:1 allocation ratio.