Dentin penetrability evaluation of three different dyes in root end cavities filled with mineral trioxide aggregate MTA

• Autor(a) principal: Vogt, Beatriz Farias
• Data de Publicação: 2006
• Outros Autores: Xavier, Cristina Braga, Demarco, Flávio Fernando
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFPel - Guaiaca
• Texto Completo: http://repositorio.ufpel.edu.br/handle/ri/841
• topic: Dental leakage; Dyes; Retrograde obturation

The purpose of this study was to evaluate the penetration of three dyes in MTA root-end fillings. In 30 single-rooted teeth, cavities for retrofilling were prepared with an ultrasound appliance and filled with MTA. The specimens were randomly assigned to three groups (n = 10) and immersed in the following solutions: 2% methylene blue (MET),50% silver nitrate (NIT) and 0.2% rhodamine B (ROD). Two transversal slices (1 mm) of the retrofilling region were obtained and evaluated using the Image Tool 3.0 software to obtain a quantitative evaluation (in mm2)of the dye penetration around the retrofillings. Data were submitted to statistical analysis using Student’s t-test.The lowest degree of dye penetration was observed for the NIT group, in both slices (p < 0.05). Dye penetration was significantly larger in the ROD group when compared to the NIT group, in both slices (p < 0.05), and to the MET group, only in slice 1 (p < 0.05). Within the limitations of this study, it was concluded that the choice of dye could influence the penetration evaluation in root-end filling studies, and that the NIT had the lowest penetration capacity in the apical dentine.