TSUI-HSIEN HUANGCHIA-TZE KAOSHINN-JYH DING2026-10-162026-10-162009-01-01Pure ID: 15014529Pure UUID: b1f8f4e5-6fff-4633-8507-704be75fb6bd10.1016/j.joen.2008.09.015https://www.scopus.com/pages/publications/57149127217https://scholars.csmu.edu.tw/handle/123456789/33332The 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% Na2HPO4 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 Na2HPO4. When immersed in a pH 4.0 solution for 7 days, WMTA mixed with water or Na2HPO4 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.4enjournal article