title: The effect of a physiologic solution pH on properties of white mineral trioxide aggregate.
abstract: The purpose of this study was to investigate the effect of two solutions differing by pH (6.4 and 4.0) and the use of a setting accelerator (15% Na(2)HPO(4) solution) on the properties of white-colored mineral trioxide aggregate (WMTA). These studies indicated that pH 4.0 had a deleterious effect on the morphology of WMTA mixed with water, however, not for WMTA mixed with Na(2)HPO(4). When immersed in a pH 4.0 solution for 7 days, WMTA mixed with water or Na(2)HPO(4) achieved a diametral tensile strength of 7.9 and 9.0 MPa, respectively, which was significantly lower (p < 0.05) than those obtained at pH 6.4 (11.2 and 12.0 MPa) but significantly higher (p < 0.05) than day 0 samples (4.4 and 4.8 MPa). Mixing WMTA with the accelerator did not significantly affect the microstructure, solubility, or strength in an acidic environment.
authors.affiliation: Institute of Stomatology, Chung-Shan Medical University, Taichung, Taiwan, Republic of China.
authors.forename: Ming-You
authors.initials: MY
authors.lastname: Shie
authors.forename: Tsui-Hsien
authors.initials: TH
authors.lastname: Huang
authors.forename: Chia-Tze
authors.initials: CT
authors.lastname: Kao
authors.forename: Chiao-Hui
authors.initials: CH
authors.lastname: Huang
authors.forename: Shinn-Jyh
authors.initials: SJ
authors.lastname: Ding
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D004338:Drug Combinations; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D012995:Solubility; D013500:Surface Tension; D014867:Water / Q000737:chemistry
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D010710:Phosphates; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D014867:Water; C018279:sodium phosphate