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Sample preparation scheme and groups. (A) Sound tooth embedded into acrylic resin; (B) Flattened tooth with exposed dentin tissue; (C) Lithium disilicate glass-ceramic block cemented; (D) Sectioned sample with the beams separated; (E) Beam removed from the position; (F) Groups with 60 μm of cement layer thickness; (G) Groups with 120 μm of cement layer thickness and (H) Groups with 180 μm of cement layer thickness.
