Department of Materials Engineering, Faculty of Engineering, Kasetsart University.
Department of Prosthodontics, Faculty of Dentistry, Mahidol University.
Dent Mater J. 2019 Jun 1;38(3):378-387. doi: 10.4012/dmj.2018-077. Epub 2019 Mar 13.
The mica-based glass-ceramics were prepared in the SiO-AlO-MgO-MgF-SrCO-CaCO-CaF-PO glass system. There were four mica-based glass-ceramics produced in this study according to the pigment added (CeO or Pr-ZrSiO/Fe-ZrSiO) and crystallization time (5-35 min). Four dental glass-ceramics, which were leucite-based, lithium disilicate-based and two zirconia reinforced lithium silicate ceramics, were also tested. The phase identification of mica-based glass-ceramics was performed using an X-ray diffractometer. The fracture toughness (K) was determined using the fractographic analysis approach. The one-way ANOVA was used to analyze the significant differences among the obtained K values at a=0.05. The results from the phase analysis showed that the mica glassceramics consisted of calcium-mica, fluorapatite and strontiumapatite. The K of mica-based glass-ceramics ranged between 1.36 to 1.53 MPa•m which were superior to only that of a leucite-based glass-ceramic. The shade and translucency of mica-based glassceramics appeared to be acceptable for dental application when compared with other dental glass-ceramics.
本研究采用 SiO-AlO-MgO-MgF-SrCO-CaCO-CaF-PO 玻璃系统制备了云母基微晶玻璃。根据添加的颜料（CeO 或 Pr-ZrSiO/Fe-ZrSiO）和结晶时间（5-35 分钟），共制备了 4 种云母基微晶玻璃。还测试了 4 种牙科微晶玻璃，分别为透锂长石基、二硅酸锂基和两种氧化锆增强硅酸锂陶瓷。采用 X 射线衍射仪对云母基微晶玻璃进行了物相鉴定。采用断口形貌分析方法测定了断裂韧性（K）。采用单因素方差分析（one-way ANOVA）在 a=0.05 水平上分析了获得的 K 值之间的显著差异。物相分析结果表明，云母微晶玻璃由钙云母、氟磷灰石和锶磷灰石组成。云母基微晶玻璃的 K 值在 1.36 至 1.53 MPa·m 之间，优于透锂长石基微晶玻璃。与其他牙科微晶玻璃相比，云母基微晶玻璃的颜色和半透明度似乎适用于牙科应用。
