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KMID : 1035320190460030131
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Korean Society for Dental Materials
2019 Volume.46 No. 3 p.131 ~ p.138
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Discoloration and radiopacity of white mineral trioxide aggregate with various radiopacifiers
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Kwon Jae-Sung
Kim Yeo-Jin
Park Il-Soon
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Abstract
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The use of the mineral trioxide aggregate (MTA) has been expanded as the material can be applied on various treatmentof endodontic care, which also has many advantages including bioactivity. Still, the discolorations of the materials have beenpresented as a concern related to esthetic appearances, which is caused by the presence of radiopacifiers. Therefore, theaim of this study was to investigate the color stability and radiopacity of white MTA with various radiopacifiers.
Four different radiopacifiers [bismuth oxide (BM), calcium tungstate (CT), barium oxide (BO), and zirconium oxide (ZO)]were used. The radiopacity was tested according to ISO 6876, and the color change before and after immersing in a 5%hypochlorite solution was tested using a spectrophotometer. The group with no radiopacifier (NR) was used as a negativecontrol and ProRoot MTA (PR) was used as the commercial control. The immersion of the PR and BM in sodium hypochloriteresulted in a dark brown discoloration, in which the values were higher than the rest of the group (p<0.05). No changewas observed in the NR. Moreover, the CT and ZO showed no color change compared to the NR (p>0.05). In terms ofthe radiopacity, the NR showed the lowest value as expected (p<0.05). Meanwhile, the BM showed the highest value (p<0.05),followed by PR and BO (p<0.05). The NR showed the lowest radiopacity values. The result of this study will be usefulfor future development of MTA that would have clinically adequate radiopacity with minimum discoloration.
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KEYWORD
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Discoloration, Mineral Trioxide Aggregate, Radiopacity
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