Gambarini G, De Luca M, Gerosa R
Department of Dental Materials, University of Siena, Dental School, Italy.
J Endod. 1998 Jun;24(6):432-4. doi: 10.1016/S0099-2399(98)80027-7.
Several previous studies have investigated the advantage of temperature on tissue-dissolving and antimicrobial properties of sodium hypochlorite. However, it is known that the chemical stability of sodium hypochlorite is adversely affected by exposure to high temperature. The purpose of this study was to investigate the effect of heating sodium hypochlorite to 50 degrees C on the stability of the solution. An iodometric titration test was used to evaluate the decomposition rates of heated and nonheated solutions over 30 days. Results showed that all specimens exhibited a minimal, gradual degradation versus time. However, no statistically significant difference (p < 0.05) was noted between the two groups. After 30 days, both heated and non-heated solutions maintained high available chlorine content and pH values consistent with excellent tissue-dissolving and antibacterial properties.
此前已有多项研究探讨了温度对次氯酸钠组织溶解和抗菌性能的影响。然而，众所周知，次氯酸钠的化学稳定性会因高温暴露而受到不利影响。本研究的目的是调查将次氯酸钠加热至50摄氏度对溶液稳定性的影响。采用碘量滴定试验评估加热和未加热溶液在30天内的分解速率。结果显示，所有样本随时间推移均呈现出最小程度的逐渐降解。然而，两组之间未观察到统计学上的显著差异（p<0.05）。30天后，加热和未加热的溶液均保持了较高的有效氯含量和pH值，与优异的组织溶解和抗菌性能相符。
