The hydration chemistry of ProRoot MTA
‘Tooth-coloured’ ProRoot MTA is an endodontic cement comprising an 80:20 wt% mixture of white Portland cement (WPC) and bismuth oxide. The setting reactions within this cement system are not currently well understood. Accordingly, this research monitors the early hydration chemistry of ProRoot MTA b...
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| Veröffentlicht in: | Dental Materials Journal 2015/07/30, Vol.34(4), pp.458-465 |
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| creator | LI, Qiu COLEMAN, Nichola J. |
| description | ‘Tooth-coloured’ ProRoot MTA is an endodontic cement comprising an 80:20 wt% mixture of white Portland cement (WPC) and bismuth oxide. The setting reactions within this cement system are not currently well understood. Accordingly, this research monitors the early hydration chemistry of ProRoot MTA by X-ray diffraction, solid state nuclear magnetic resonance and Fourier transform infrared spectroscopies, and isothermal calorimetry. The initial rate of hydration is rapid with 40% having reacted within the first 24 h; it then slows considerably such that within 3 days the hydration reactions are 58% complete and only increase by a further 1% within one week. The relatively fast reaction of alite to form C-S-H gel and portlandite, and the development of the calcium aluminosulphate phases, are as would be anticipated for the hydration of pure WPC. These findings confirm that bismuth oxide is an inert additive which does not participate in the hydration reactions. |
| doi_str_mv | 10.4012/dmj.2014-309 |
| format | Article |
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The setting reactions within this cement system are not currently well understood. Accordingly, this research monitors the early hydration chemistry of ProRoot MTA by X-ray diffraction, solid state nuclear magnetic resonance and Fourier transform infrared spectroscopies, and isothermal calorimetry. The initial rate of hydration is rapid with 40% having reacted within the first 24 h; it then slows considerably such that within 3 days the hydration reactions are 58% complete and only increase by a further 1% within one week. The relatively fast reaction of alite to form C-S-H gel and portlandite, and the development of the calcium aluminosulphate phases, are as would be anticipated for the hydration of pure WPC. 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Mater. J.</addtitle><description>‘Tooth-coloured’ ProRoot MTA is an endodontic cement comprising an 80:20 wt% mixture of white Portland cement (WPC) and bismuth oxide. The setting reactions within this cement system are not currently well understood. Accordingly, this research monitors the early hydration chemistry of ProRoot MTA by X-ray diffraction, solid state nuclear magnetic resonance and Fourier transform infrared spectroscopies, and isothermal calorimetry. The initial rate of hydration is rapid with 40% having reacted within the first 24 h; it then slows considerably such that within 3 days the hydration reactions are 58% complete and only increase by a further 1% within one week. The relatively fast reaction of alite to form C-S-H gel and portlandite, and the development of the calcium aluminosulphate phases, are as would be anticipated for the hydration of pure WPC. 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Mater. J.</addtitle><date>2015</date><risdate>2015</risdate><volume>34</volume><issue>4</issue><spage>458</spage><epage>465</epage><pages>458-465</pages><issn>0287-4547</issn><eissn>1881-1361</eissn><abstract>‘Tooth-coloured’ ProRoot MTA is an endodontic cement comprising an 80:20 wt% mixture of white Portland cement (WPC) and bismuth oxide. The setting reactions within this cement system are not currently well understood. Accordingly, this research monitors the early hydration chemistry of ProRoot MTA by X-ray diffraction, solid state nuclear magnetic resonance and Fourier transform infrared spectroscopies, and isothermal calorimetry. The initial rate of hydration is rapid with 40% having reacted within the first 24 h; it then slows considerably such that within 3 days the hydration reactions are 58% complete and only increase by a further 1% within one week. The relatively fast reaction of alite to form C-S-H gel and portlandite, and the development of the calcium aluminosulphate phases, are as would be anticipated for the hydration of pure WPC. These findings confirm that bismuth oxide is an inert additive which does not participate in the hydration reactions.</abstract><cop>Japan</cop><pub>The Japanese Society for Dental Materials and Devices</pub><pmid>26235710</pmid><doi>10.4012/dmj.2014-309</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Dental Materials Journal, 2015/07/30, Vol.34(4), pp.458-465 |
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| language | eng |
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| source | J-STAGE Free; MEDLINE; EZB-FREE-00999 freely available EZB journals |
| subjects | Aluminum Compounds - chemistry Bismuth oxides Calcium Compounds - chemistry Calorimetry Cement hydration Cements Dental materials Dentistry Drug Combinations Hydration Magnetic Resonance Spectroscopy - methods Materials Testing Mineral trioxide aggregate Monitors Nuclear magnetic resonance spectroscopy Oxides - chemistry Portland cements Reactions (nuclear) Silicates - chemistry Spectroscopy, Fourier Transform Infrared Water - chemistry X-Ray Diffraction |
| title | The hydration chemistry of ProRoot MTA |
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