Tooth Discoloration Using Calcium Silicate-Based Cements For Simulated Revascularization in Vitro

Abstract The endodontic revascularization may be an alternative treatment for necrotic immature teeth, however, several steps cause tooth discoloration. This study evaluated the use of three calcium silicate-based cements with different radiopacifying agents on color alteration (∆E) extracted premolars after simulation revascularization. Forty single rooted were shaped #1-6 gates Glidden drills, rinsed sodium hypochlorite, and filled fresh human blood. Three (bismuth oxide - CSBi, tungstate CSW, zirconium CSZr) applied over blood clot (n=10). control group received application a temporary zinc oxide-based cement (TFZn) ∆E was measured spectrophotometer, using L*a*b* system International Commission Illumination (CIELab), in times: prior to preparation access cavity (t0); right (t1); one (t2), two (t3), (t4) four (t5) months. site evaluation standardized by silicon matrix, reading performed 3 times per tooth, teeth stored 37º water between evaluations. ∆E, whiteness (WID index) yellowness (b*) evaluated. Data subjected one-way ANOVA repeated measures ANOVA, followed Tukey’s post hoc test (α=0.05). All groups similar ∆E1 (t0-t1). lowest constant group. In all times, CSBi presented highest (p<0.01). CSW CSZr intermediate values. WID index from more distancing ‘white’ reference. greatest decrease (b* value). containing bismuth tested clinically perceptible Calcium used as radiopacifiers discoloration