Clinical performance of whitening on devitalized teeth: a retrospective observational study

Objective: This retrospective observational study evaluated the clinical performance of intracoronal whitening and correlated the main factors that interfere with its stability and patient satisfaction. Material and Methods: The paper was designed following the STROBE statement. Patients from the Institute of Science and Technology - ICT/UNESP database who underwent nonvital tooth whitening from August 2010 to July 2015 were selected. Data collection was performed by researching the institution records, patients interview, clinical and radiographic examination. Data were analyzed using Mann-Whitney test and Spearman's correlation (p 0.05). There was no case of external cervical root resorption. C onclusion: Color changes after whitening influenced patient’s satisfaction. There was no correlation among the color relapse and height of gutta-percha, return interval or cause of darkening. KEYWORDS Tooth discoloration; Tooth nonvital; Tooth whitening.