tooth discoloration after using a premixed mineral trioxide aggregate–based endodontic sealer (endoseal mta)

Introduction: introduction: the present study aimed to evaluate the coronal discoloration of human teeth induced by using a new endoseal mta compared to an ah plus sealer. methods: a total of 40 premolars extracted for orthodontic reasons were used in the present study. then, the teeth were incised in the coronal third of the root 3 mm below the cementoenamel junction. samples were randomly allocated to two experimental groups (group 1: ah plus sealer, group 2: endoseal mta) and 6 teeth as the negative control group. the color evaluation was determined at four different times: before placing sealers (t0), 1 month (t1), 3 months (t2), and 6 months (t₃) after that with an intraoral spectrophotometer. data were analyzed using multivariate test and hotelling's trace. a p-value <0.05 was considered statistically significant. results: the endoseal group showed discoloration after 1 and 3 months of the placement of sealer as ah plus sealer. also, discoloration of the ah plus group was higher than that of the endoseal group after 3 months; however, it was not significant (p˃0.05). furthermore, discoloration of the endoseal group was significantly higher than that of the ah plus group after 6 months (p<0.05). discoloration tended to decrease until 6 months in both groups. conclusion: the endoseal group indicated discoloration which is comparable to ah plus in 1 and 3 months; however, discoloration in the ah plus group decreased compared to the endoeseal mta group after 6 months.