Morphological and chemical analysis of different precipitates on mineral trioxide aggregate immersed in different fluids
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概要
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The purpose of this study was to analyze the ultrastructures and chemical compositions of precipitates formed on mineral trioxide aggregate (MTA; White ProRoot MTA) immersed in distilled water (DW) or phosphate buffered saline (PBS), based on the attribution that MTA’s bioactivity and sealing ability are influenced by its interaction with the external fluid environment. After 1 and 14 days of immersion, precipitates formed on MTA disks were analyzed using wavelength-dispersive X-ray spectroscopy electron probe microanalyzer with image observation function (SEM-EPMA; EPMA1601, Shimadzu, Kyoto, Japan), and Fourier transform-infrared (FT-IR) spectroscopy. On DW specimens, cubic-like crystals containing Ca, O, and C (17, 66, and 17 at% respectively) were produced. State analysis of calcium kβ spectrum also revealed calcium hydroxide. On PBS specimens, acicular-spherical and lath-like crystals with Ca/P molar ratios of 1.42 and 1.58 respectively were produced. In conclusion, the precipitates formed on DW specimens were identified as calcium carbonate and calcium hydroxide primarily, whereas the precipitates on PBS specimens were inferred to be amorphous calcium phosphate.
- 2010-09-01
著者
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OKIJI Takashi
Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niiga
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HAN Linlin
Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niiga
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OKAWA Seigo
Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate Scho
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Okiji Takashi
Division Of Cariology Operative Dentistry And Endodontics Department Of Oral Health Science Niigata
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Han Linlin
Division Of Cariology Operative Dentistry And Endodontics Department Of Oral Health Science Niigata
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Han Linlin
Division Of Cariology Niigata University Gradeate School Of Medical And Dental Science For Oral Life
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Okawa Seigo
Division Of Biomaterial Science Department Of Oral Health Science Niigata University Graduate School
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Okawa Seigo
Division Of Biomaterial Science Department Of Oral Health Science Niigata University Graduate School
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