Abstract
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). Results: The initial search on 1275 records resulted in 43 patients, of whom 18 were selected according to eligibility criteria. There was positive correlation only between the degree of patient’s satisfaction and the perception of color difference after whitening treatment (p<0.05). Color relapse was observed in all conditions, independently of the period of follow-up (p>0.05). There was no case of external cervical root resorption. Conclusion: 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.KEYWORDSTooth discoloration; Tooth nonvital; Tooth whitening.
Highlights
Tooth discoloration has been pointed out as one of the leading causes of patients’ esthetic unsatisfaction [1,2,3]
Two whitening techniques are proposed: the inside-outside technique, which carbamide peroxide and hydrogen peroxide agents are used in low concentrations [9], and the walking bleaching technique [10], where association of sodium perborate and hydrogen peroxide is employed in the pulp chamber, with weekly changes until a satisfactory tooth color was achieved
This research was developed in the retrospective observational study model and followed the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) statement
Summary
Tooth discoloration has been pointed out as one of the leading causes of patients’ esthetic unsatisfaction [1,2,3]. Intracoronal whitening is a conservative alternative for the esthetic treatment of nonvital teeth [5] In this treatment, two whitening techniques are proposed: the inside-outside technique, which carbamide peroxide and hydrogen peroxide agents are used in low concentrations [9], and the walking bleaching technique [10], where association of sodium perborate and hydrogen peroxide is employed in the pulp chamber, with weekly changes until a satisfactory tooth color was achieved. Two whitening techniques are proposed: the inside-outside technique, which carbamide peroxide and hydrogen peroxide agents are used in low concentrations [9], and the walking bleaching technique [10], where association of sodium perborate and hydrogen peroxide is employed in the pulp chamber, with weekly changes until a satisfactory tooth color was achieved These treatments can cause alterations in the enamel, dentin and cement surface structure, decreasing the microhardness, changing the chemical composition of enamel and dentin and external root resorption [5,11,12]
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