Komabayashi Takashi, Spångberg Larz S W
Division of Endodontology, Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, University of Connecticut, Farmington, CT 06030-1715, USA.
J Endod. 2008 Jan;34(1):94-8. doi: 10.1016/j.joen.2007.10.013.
The aim of this study is to characterize the particle size distribution and circularity of various Mineral Trioxide Aggregates (MTA) (ProRoot MTA/ MTA Angelus/Gray and White) and Portland cements with effective size ranges of 1.5-160 microm using a flow particle analyzer (Sysmex FPIA-3000, Kobe, Japan). Cumulative percentage of particles between 6 and 10 microm were, 65, 73, 48, 53, and 70 %, for Gray ProRoot MTA, White ProRoot MTA, Gray MTA Angelus, White MTA Angelus, and Portland cement, respectively. ProRoot MTA contains fewer large particles than MTA Angelus. MTA Angelus contains a higher number of small particles than ProRoot MTA. White MTA contains smaller particles with a narrower range of size distribution than Gray MTA. MTA Angelus particles have relatively low circularity and wide size distribution and are less homogeneous than ProRoot MTA.
本研究的目的是使用流动颗粒分析仪（Sysmex FPIA - 3000，日本神户）对有效粒径范围为1.5 - 160微米的各种三氧化矿物凝聚体（MTA）（ProRoot MTA/ MTA Angelus/灰色和白色）和波特兰水泥的粒度分布和圆形度进行表征。对于灰色ProRoot MTA、白色ProRoot MTA、灰色MTA Angelus、白色MTA Angelus和波特兰水泥，粒径在6至10微米之间的颗粒累积百分比分别为65%、73%、48%、53%和70%。ProRoot MTA所含的大颗粒比MTA Angelus少。MTA Angelus所含的小颗粒比ProRoot MTA多。白色MTA所含颗粒比灰色MTA小，且粒径分布范围更窄。MTA Angelus颗粒的圆形度相对较低，粒径分布较宽，且比ProRoot MTA的均匀性差。
