Fukui H, Abe Y, Ai S
Shika Rikogaku Zasshi. 1977 Apr;18(42):146-51.
It is well known that minerals of bone or tooth are essentially of CaO-P2O5 system. Glass and the crystallized product, i.e., so-called "glass-ceramics" of which chemical composition is 55 CaO . 45 P2O5 (in mole %) and have been developed for biomaterials were subjected to chemical durability test. Human enamel was also tested for the comparison of the data with them. All the specimens were ground to powders in size from 74 to 140 micrometer. A hundred milligram of the powders were immersed into 100 ml. of N/10 acetate buffer (1 mol acetic acid) solution (pH 4.1) at a constant temperature of 37 degrees C. Amount of Ca2+ and P5+ dissolved were determined by an atomic absorption method and Fiske-Subbarow method, respectively. The order of dissolution is human enamel greater than glass greater than glass-ceramics: the amount of Ca2+ (SCa) and P5+ (Sp) with soaking time (t) was expressed by the following equations, :formula: (see book). The glass and the glass-ceramics show good resistance against a weak acid.
众所周知，骨骼或牙齿中的矿物质本质上属于CaO - P2O5体系。对玻璃以及化学成分（摩尔比）为55 CaO. 45 P2O5的晶化产物，即所谓的“玻璃陶瓷”进行了化学耐久性测试，这些玻璃陶瓷已被开发用作生物材料。同时，对人类牙釉质也进行了测试，以便与它们的数据进行比较。所有试样均被研磨成74至140微米大小的粉末。将100毫克粉末在37摄氏度恒温下浸泡在100毫升N/10醋酸缓冲液（1摩尔醋酸）溶液（pH 4.1）中。分别通过原子吸收法和菲斯克 - 苏巴罗法测定溶解的Ca2+和P5+的量。溶解顺序为人类牙釉质大于玻璃大于玻璃陶瓷：Ca2+（SCa）和P5+（Sp）的量随浸泡时间（t）的变化由以下公式表示：（见书籍）。玻璃和玻璃陶瓷对弱酸表现出良好的抗性。
