Dentin penetrability evaluation of three different dyes in root-end cavities filled with mineral trioxide aggregate (MTA).
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 Students 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.
Vogt
Beatriz Farias
BF
Department of Oral and Maxillofacial Surgery, Dental School, Federal University of Pelotas.
Xavier
Cristina Braga
CB
Demarco
Flávio Fernando
FF
Padilha
Marcio Schüler
MS
D017607:Aluminum Compounds / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D003763:Dental Leakage / Q000517:prevention & control*; D003786:Dental Pulp Cavity / Q000737:chemistry; D003806:Dentin Permeability; D004338:Drug Combinations; D006801:Humans; D008751:Methylene Blue / Q000032:analysis; D010087:Oxides / Q000737:chemistry*; D012184:Retrograde Obturation; D012235:Rhodamines / Q000032:analysis; D012387:Root Canal Filling Materials / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D012835:Silver Nitrate / Q000032:analysis
D017607:Aluminum Compounds; D017610:Calcium Compounds; D004396:Coloring Agents; D004338:Drug Combinations; D010087:Oxides; D012235:Rhodamines; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D012835:Silver Nitrate; D008751:Methylene Blue