Staining susceptibility of new calcium aluminate cement (EndoBinder) in teeth: a 1-year in vitro study.

AIM: To evaluate the staining susceptibility of new calcium aluminate cement (EndoBinder, EB) in teeth, with or without radiopacifying agent, in comparison with mineral trioxide aggregate (MTA). MATERIALS AND METHODS: Forty bovine incisors were used. After biomechanical preparation and filling, 2 mm of their fillings were removed for cervical plug fabrication (n = 10): EB without radiopacifier; EndoBinder + Bismuth Oxide (EBBO); Gray mineral trioxide aggregate (GMTA) and White mineral trioxide aggregate (WMTA). After teeth restoration, initial color readout was taken (Easyshade - CIE Lab) on the vestibular face. The teeth were stored in artificial saliva at 37°C for 1 year, and after time intervals of 30, 180, and 360 days, new color readouts were taken to determine color alteration (ΔE) in comparison with the initial readout (baseline). RESULTS: The results (2-way anova repeated measures, Bonferroni - P < 0.05) demonstrated that after 360 days, all groups presented ΔE above the clinically accepted limit (ΔE ≥ 3.3), however, without significant difference among them (P > 0.05). All groups presented decrease in ΔL values over the course of time, and the greatest variation occurred for WMTA, with significant difference in comparison with EB and EBBO (P < 0.05). CONCLUSIONS: Some negative features of MTA, such as the high incidence of dental structures staining justify the development of new materials. GMTA, WMTA, and EB with and without radiopacifying agent displayed color alteration (ΔE) after 360 days; however, the luminosity change (ΔL) was lower in EB in comparison with GMTA and WMTA.