Chen Chun-Cheng, Ho Chia-Che, David Chen Chan-Hen, Ding Shinn-Jyh
Department of Dentistry, Chung-Shan Medical University, Taichung, Taiwan, Republic of China.
J Endod. 2009 Sep;35(9):1288-91. doi: 10.1016/j.joen.2009.05.036. Epub 2009 Jul 10.
The purpose of this study was to examine the physicochemical properties of novel calcium silicate cements (CSCs) prepared by using a sol-gel method.
The compressive strength, morphology, and phase composition of various cements were evaluated after mixing with water, in addition to setting time and pH value.
As solid phases, the sol-gel-derived powders mainly consisted of beta-dicalcium silicate. Setting times for cements mixed with water ranged from 12-42 minutes and were lower for cements with higher starting CaO content. The compressive strength of the CSCs ranged from 0.3-15.2 MPa; these values were significantly different (P < .05). Calcium silicate hydrate (C-S-H) was the principal phase that formed in the hydration process. The CSCs' pH values changed from an initial 11 to a high of 13.
CSCs display advantageously shortened setting times and might have potential for endodontic use, although further tests are necessary to confirm this.
本研究的目的是检测采用溶胶-凝胶法制备的新型硅酸钙水门汀（CSCs）的物理化学性质。
除凝固时间和pH值外，还对各种水门汀与水混合后的抗压强度、形态和相组成进行了评估。
作为固相，溶胶-凝胶衍生粉末主要由β-硅酸二钙组成。与水混合的水门汀凝固时间为12 - 42分钟，起始CaO含量较高的水门汀凝固时间较短。CSCs的抗压强度为0.3 - 15.2 MPa；这些值有显著差异（P <.05）。水化硅酸钙（C-S-H）是水化过程中形成的主要相。CSCs的pH值从初始的11变为最高13。
CSCs显示出有利的缩短凝固时间，尽管需要进一步测试来证实，但可能有用于牙髓治疗的潜力。
