Morphological and chemical analysis of different precipitates on mineral trioxide aggregate immersed in different fluids

被引：42
作者：
Han, Linlin [1 ]
Okiji, Takashi [1 ]
Okawa, Seigo [2 ]
机构：
[1] Niigata Univ, Grad Sch Med & Dent Sci, Dept Oral Hlth Sci, Div Cariol Operat Dent & Endodont,Chuo Ku, Niigata 9518514, Japan
[2] Niigata Univ, Grad Sch Med & Dent Sci, Dept Oral Hlth Sci, Div Biomat Sci,Chuo Ku, Niigata 9518514, Japan
来源：
DENTAL MATERIALS JOURNAL | 2010年 / 29卷 / 05期
关键词：
Mineral trioxide aggregate; Surface precipitation; SEM-EPMA; PHOSPHATE-CONTAINING FLUID; IN-VITRO BIOACTIVITY; CALCIUM-PHOSPHATE; PORTLAND-CEMENT; DENTAL-PULP; TRANSFORMATION; ABILITY; MECHANISM; APATITE; MTA;
D O I：
10.4012/dmj.2009-133
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
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, 0, and C (17, 66, and 17 at% respectively) were produced. State analysis of calcium k(beta) 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.
引用
收藏
页码：512 / 517
页数：6
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