Cook W D
J Biomed Mater Res. 1983 Mar;17(2):283-91. doi: 10.1002/jbm.820170207.
In order to gain information on the setting of dental cements, the influence of Ca2+, Mg2+, Zn2+, and Al3+ ions on the viscosity of concentrated solutions of partly neutralized poly(carboxylic acids) has been measured. The increase in viscosity with increasing cation concentration was semi-quantitatively interpreted in terms of chain growth and branching due to intermolecular bridging of the carboxylate groups by the metal ions. The concentration of cation required to produce gelation was considerably greater than expected and may be due to the wastage of cations by the formation of intramolecular links. The incorporation of tartrate ion into the polyacid solution retarded the reaction between Al3+ and the polyacid and may explain some features of the setting of glass ionomer cements.
为了获取有关牙科水门汀凝固的信息，已测定了Ca2+、Mg2+、Zn2+和Al3+离子对部分中和的聚（羧酸）浓溶液粘度的影响。粘度随阳离子浓度增加而升高，这可根据金属离子通过羧酸根基团的分子间桥连导致的链增长和支化进行半定量解释。产生凝胶化所需的阳离子浓度远高于预期，这可能是由于分子内连接的形成导致阳离子损耗。将酒石酸根离子引入多元酸溶液中会阻碍Al3+与多元酸之间的反应，这或许可以解释玻璃离子水门汀凝固的一些特点。
