An in vitro comparison of color stability between alkasite and different restorative materials in various staining...

This study evaluated the color stability of an alkasite material exposed to different solutions compared with a high-viscosity glass hybrid and a nanohybrid composite resin. A total of ninety-six disc-shaped samples (n=8) were prepared from an alkasite material (Cention N;CN), a high-viscosity glass hybrid (Equia Forte HT;EF), and a nanohybrid composite resin (Estelite Posterior;EP). After baseline color measurements, the samples were stored in three different solutions (distilled water, coffee, and Coca-Cola Zero). Color measurements were repeated on the 7^th and 28^th day. The discolorations were recorded as ΔE₀₀₁ (baseline-7 days) and ΔE₀₀₂ (baseline-28 days) (CIEDE2000). Generalized linear models were used to compare the data across material, solution, and time interval main effects and their interactions. Multiple comparisons were performed using the Tukey test. Statistical significance was determined as p < 0.05. According to the ∆E₀₀ values, material, solution, and time interval were significant main effects (p < 0.001). The lowest and highest ∆E₀₀₂ values were found in EP-distilled water and CN-coffee groups, respectively. Overall, CN demonstrated higher ∆E₀₀₁ and ∆E₀₀₂ results. Alkasite material demonstrated higher discoloration than the nanohybrid composite resin and the high-viscosity glass hybrid material. All tested materials exceeded the acceptability and perceivability thresholds for ΔE₀₀₁ and ΔE₀₀₂.