title: Properties of an accelerated mineral trioxide aggregate-like root-end filling material.
abstract: The purpose of the study was to examine the physicochemical properties of mineral trioxide aggregate (MTA)-like cements prepared from SiO(2), CaO, and Al(2)O(3) as matrices, and ZnO, MgO, and Fe(2)O(3) as additives. The MTA-like cements showed a significantly (p < 0.05) faster setting time (<14 minutes) than MTA when mixed with water, although there was a significant decrease (p < 0.05) in diametral tensile strength, ranging from 0.9 to 3.1 MPa in comparison to MTA (4.4 MPa). The addition of ZnO, MgO, and Fe(2)O(3) to the MTA-like cement led to a significantly (p < 0.05) higher strength than MTA-like cement without additives. The pH values of the MTA-like cements were changed from an initial 11 to a high of 13, similar to the results of MTA. Future characterization of the examined MTA-like cement with shortened setting time is needed before it is considered a viable candidate for dental root-end-filling applications.
authors.affiliation: Institute of Oral Materials Science, Chung-Shan Medical University, Taiwan, Republic of China.
authors.forename: Chia-Tze
authors.initials: CT
authors.lastname: Kao
authors.forename: Ming-You
authors.initials: MY
authors.lastname: Shie
authors.forename: Tsui-Hsien
authors.initials: TH
authors.lastname: Huang
authors.forename: Shinn-Jyh
authors.initials: SJ
authors.lastname: Ding
mesh_terms: D017607:Aluminum Compounds / Q000138:chemical synthesis / Q000737:chemistry; D017610:Calcium Compounds / Q000138:chemical synthesis / Q000737:chemistry; D003738:Dental Cements / Q000138:chemical synthesis / Q000737:chemistry; D003799:Dental Stress Analysis; D004338:Drug Combinations; D006244:Hardness; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000138:chemical synthesis / Q000737:chemistry; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials / Q000138:chemical synthesis / Q000737:chemistry; D017640:Silicates / Q000138:chemical synthesis / Q000737:chemistry; D013718:Tensile Strength; D013997:Time Factors; D014961:X-Ray Diffraction
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C472247:accelerated Portland cement; C086631:mineral trioxide aggregate