Bruno Martini Guimarães1, Talita Tartari2, Marina Angélica Marciano2, Rodrigo Ricci Vivan2, Rafael Francisco Lia Mondeli2, Josette Camilleri3, Marco Antonio Hungaro Duarte2. 1. Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil. Electronic address: brunomgui@usp.br. 2. Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil. 3. Department of Restorative Dentistry, Faculty of Dental Surgery, University of Malta, Msida, Malta.
Abstract
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°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% DW/20% PG as a vehicle for MTA results in a lower color alteration when in contact with blood.
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°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% DW/20% PG as a vehicle for MTA results in a lower color alteration when in contact with blood.
Authors: Yan Huang; Xiaoying Tang; Zafer C Cehreli; Xiaoyun Dai; Jiangjingjun Xu; Hongshui Zhu Journal: J Int Med Res Date: 2019-07-31 Impact factor: 1.671
Authors: Hui Miao; Min Chen; Tsetsen Otgonbayar; Sha Sha Zhang; Min Hong Hou; Zhou Wu; Yong Lan Wang; Li Geng Wu Journal: Clin Case Rep Date: 2015-11-06
Authors: Josette Camilleri; Joseph Borg; Denis Damidot; Enrico Salvadori; Peter Pilecki; Paul Zaslansky; Brian W Darvell Journal: PLoS One Date: 2020-11-11 Impact factor: 3.240