We investigated the short-term (4 weeks)color stability of light-cure and dual-cure resin cements. Sixty disk-shaped test specimens of adhesive resin cement (10 × 1 mm) were prepared. One feldspathic porcelain test specimen (12 × 14 × 0.8 mm) was prepared from a prefabricated ceramic block. The feldspathic sample was placed on the resin cement disk and all the measurements were performed without cementation. Specific color coordinate differences (ΔL, Δa, and Δb), and the total color differences (ΔE) were calculated after immersion in distilled water for different periods. Data were compared using one-way analysis of variance (

Each of the surface treatment methods increased the SBS, with the most effective method being air abrasion with silica-coated AlO.

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The present study results showed that GZs of FPM and SPM teeth for both left and right sight was coronally located according to ZL.

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