There were not participants to complete sample size

The color change of endodontically treated teeth is a common concern in clinical practice. The objective of this study will be to evaluate, in vivo, the color change (ΔE00) caused by endodontic treatment. A randomized clinical trial (RCT) will be conducted with the objective of evaluating ΔE00 originated from epoxy resin (AH Plus) and mineral trioxide aggregate (MTA Fillapex) endodontic sealers, sectioned at the cervical level and 2 mm below, in a period between the immediate endodontic treatment versus after 3, 6 and 12 months.

The sample syze determined that 48 anterior teeth (incisors and canines) and posterior teeth (premolars) should be included in the study. The sealer and cut will be randomly determined at time of endodontic treatment, originating four groups (n = 12): AH Plus-Cervical, MTA Fillapex-Cervical, AH Plus-2mm and MTA-2mm. The endodontic access cavities will be sealed with resin composed of the color of the dental element. The mean, standard deviation and confidence interval (CI 95%) of the values of ΔE00 obtained for each sealer will be initially analyzed using the variable cut level (cervical or 2mm) using the T test. Indeed, the values of ΔE00 will be analyzed by two-way analysis of variance, where the level of the cut and the type of sealer will be the factors under study.

Inclusion Criteria:

endodontically treated tooth, without intraradicular retainer and fixation;

• presence of homologous tooth to that treated, with pulp vitality and at least 1/3 of the crown;
• correctly patient's file showing the endodontic treatment day, the endodontic filler used, the pulp condition at the first consultation, and periapical radiography, obtained with the use of a radiographic positioner, preserved and with a clear apical image

Exclusion Criteria:

• dental elements submitted to retreatment;
• files with insufficient data, and absence of quality periapical radiography