结石消毒：次氯酸钠的掺入。
Die stone disinfection: incorporation of sodium hypochlorite.
作者信息
Breault L G, Paul J R, Hondrum S O, Christensen L C
机构信息
Main Dental Clinic, Schofield Barracks, US Army Dental Activity, Hawaii.
出版信息
J Prosthodont. 1998 Mar;7(1):13-6. doi: 10.1111/j.1532-849x.1998.tb00170.x.
PURPOSE
Previous research has shown that dental gypsum casts may be effectively disinfected by the substitution of 10% of the gauging water with 5.25% solution of sodium hypochlorite. The purpose of this investigation was to determine the properties of gypsum produced from such a solution as opposed to tap water alone.
MATERIALS AND METHODS
Tests included setting time, compressive strength, rigidity, diametral tensile strength, setting expansion, hardness, and detail reproduction.
RESULTS
The addition of sodium hypochlorite to the gauging water resulted in a statistically significant increase in the compressive strength and rigidity, and a decrease in setting time (p < or = .5). All other properties remained unchanged.
CONCLUSIONS
This substitution may be an effective and convenient method of disinfecting gypsum casts in the laboratory without adversely effecting physical and mechanical properties.
目的
先前的研究表明，用5.25%的次氯酸钠溶液替代10%的调合水可有效对牙科石膏模型进行消毒。本研究的目的是确定用该溶液而非仅用自来水制备的石膏的性能。
材料与方法
测试包括凝固时间、抗压强度、硬度、径向拉伸强度、凝固膨胀、硬度和细节再现。
结果
在调合水中添加次氯酸钠导致抗压强度和硬度在统计学上显著增加，凝固时间缩短（p≤0.5）。所有其他性能保持不变。
结论
这种替代可能是实验室中对石膏模型进行消毒的一种有效且便捷的方法，且不会对物理和机械性能产生不利影响。
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