Color Stability, Radiopacity, and Chemical Characteristics of White Mineral Trioxide Aggregate Associated with 2 Different Vehicles in Contact with Blood

Autor(es)

Guimaraes, Bruno Martini ^[1] ; Tartari, Talita ^[1] ; Marciano, Marina Angelica ^[1] ; Vivan, Rodrigo Ricci ^[1] ; Lia Mondeli, Rafael Francisco ^[1] ; Camilleri, Josette ^[2] ; Hungaro Duarte, Marco Antonio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Bauru Sch Dent, Dept Operat Dent Endodont & Dent Mat, BR-17012901 Sao Paulo - Brazil

^[2] Univ Malta, Fac Dent Surg, Dept Restorat Dent, Msida - Malta

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENDODONTICS; v. 41, n. 6, p. 947-952, JUN 2015.
• Citações Web of Science: 12

Resumo

Introduction: Discoloration of mineral trioxide aggregate (MTA) can be exacerbated by the interaction of the cement with body fluids such as blood. This study aimed to analyze the color alteration, chemical characteristics, and radiopacity of MTA manipulated with 2 different vehicles after immersion in blood or distilled water (DW). Methods: MTA mixed with 100% DW or 80% DW/20% propylene glycol (PG) as vehicles were placed into rubber rings and incubated at 37 degrees C and 100% relative humidity until set. Color assessment and scanning electron microscopy/energy-dispersive spectroscopy analysis were performed after setting and repeated after 7, 15, and 30 days after immersion in blood and DW. Statistical analysis for color alteration and radiopacity was performed using nonparametric Kruskal-Wallis and Dunn tests (P < .05). Results: When 80% DW/20% PG was used as the vehicle, significantly lower color alterations were observed for all time periods compared with 100% DW when immersed in blood (P < .05). All surfaces displayed morphologic changes after immersion in both media because of loss of bismuth. A decrease in radiopacity was observed over time in all groups, with a statistically significant difference after 30 days for groups DW immersed in blood and 80% DW/20% immersed in both media (P < .05). Conclusions: The ratio of 80% DVV/20% PG as a vehicle for MTA results in a lower color alteration when in contact with blood. (AU)

• Processo FAPESP: 13/07677-6 - Avaliação da capacidade seladora, alteração de cor e de componentes superficiais do MTA e cimento Portland associado à diferentes radiopacificadores e diferentes líquidos.
• Beneficiário: Bruno Martini Guimarães
• Modalidade de apoio: Bolsas no Brasil - Doutorado