Aims: This study aimed to evaluate the influence of different alcohol washing durations on the hardness and flexural strength of a 3D-printed permanent dental resin, considering their critical role in clinical longevity.Methods: Fifty bar-shaped specimens (25×2×2 mm) were fabricated using VarseoSmile TriniQ (BEGO, Bremen, Germany) permanent dental resin. The specimens were divided into five groups (n=10) according to alcohol washing times: 3, 5, 10, 15, and 20 minutes. Following washing in 99.5% ethanol, all specimens underwent standardized light postcuring. Hardness was measured using a Shimadzu microhardness tester, and flexural strength was assessed using an Instron universal testing machine through a three-point bending test. Data were analyzed using one-way ANOVA, with the significance level set at p
Tosun et al. (Tue,) studied this question.