Surface roughness, stainability, and translucency of an additively manufactured interim resin reinforced with a commercially available ceramic composite concentrate after coffee thermal cycling

PURPOSE: ), stainability, and translucency of a ceramic composite concentrate-reinforced interim resin with its corresponding non-reinforced formulation and with a ceramic-filled resin indicated for definitive use after coffee thermal cycling. MATERIALS AND METHODS: values were evaluated with Kruskal-Wallis and Bonferroni-corrected post hoc tests (α = 0.05). RESULTS: than AM-DEF (p < 0.001). AM-DEF had higher RTP than AM-INT after polishing (p = 0.006). However, AM-DEF also had the lowest RTP after coffee thermal cycling, whereas AM-INT had the highest (p ≤ 0.018). AM-R-INT and AM-DEF had reduced RTP after coffee thermal cycling (p ≤ 0.001). CONCLUSIONS: after polishing and coffee thermal cycling. AM-DEF exhibited a perceptible but clinically acceptable color change, whereas the other resins showed moderately unacceptable changes, highlighting potential esthetic limitations. The reinforced interim resin (AM-R-INT) exhibited a perceptible translucency difference compared with other resins after polishing, and coffee thermal cycling caused a significant reduction in translucency for both AM-R-INT and AM-DEF, resulting in clinically unacceptable changes. These findings emphasize the importance of considering both material composition and polishing procedures when selecting interim and definitive prostheses, particularly for patients with regular exposure to coffee.