J Endod:氢氧化钙和纳米氢氧化钙对根管牙本质显微硬度及表面化学结构的影响:一项体外研究

2019-07-31 lishiting MedSci原创

氢氧化钙(CH)和纳米氢氧化钙(NCH)作为根管内封药可能会影响牙本质的物理和化学特性。这篇研究的目的是为了评估CH和NCH对根部牙本质显微硬度及表面化学结构的影响。

氢氧化钙(CH)和纳米氢氧化钙(NCH)作为根管内封药可能会影响牙本质的物理和化学特性。这篇研究的目的是为了评估CH和NCH对根部牙本质显微硬度及表面化学结构的影响。

在这项体外实验中,研究将80个牙本质块随机分为2个对照组和2个实验组(n = 20)。实验组使用CH和NCH作为根管内封药。对照组中,样本使用生理盐水或2.5%次氯酸钠进行洗刷。1和4周后,采用Vickers检验评估牙本质的显微硬度,通过傅里叶变换红外光谱测试检测磷酸盐/酰胺I比率。实验数据采用1-way和2-way analyses of variance, the Tukey multiple comparison检验和Student t检验进行统计学分析。

结果显示,4周后,CH组的显微硬度显著降低,而NCH和对照组之间未见明显差异。并且,NCH诱导的减少量与次氯酸钠相当。1周后,CH和NCH组的磷酸盐/酰胺I比率与次氯酸钠和完整牙本质对照组相比显著增加,而后者在观察期间未见明显变化。

结论:CH作为根管内封药4周后会明显减弱牙本质的显微硬度,而NCH并不会导致显微硬度值的任何变化。然而,在封药1周以及CH和NCH组中可见明显的表面化学结构变化。

原始出处:

Naseri M, Eftekhar L, et al. The Effect of Calcium Hydroxide and Nano-calcium Hydroxide on Microhardness and Superficial Chemical Structure of Root Canal Dentin: An Ex Vivo Study. J Endod. 2019 Jul 22. pii: S0099-2399(19)30436-4. doi: 10.1016/j.joen.2019.06.002.

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    2019-07-31 phoebeyan520

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