Department of Restorative Dentistry, Dental School of Universidade de Passo Fundo, Passo Fundo, RS, Brazil.
Department of Restorative Dentistry, Dental School of Universidade de Passo Fundo, Passo Fundo, RS, Brazil.
Mater Sci Eng C Mater Biol Appl. 2020 Jan;106:110283. doi: 10.1016/j.msec.2019.110283. Epub 2019 Oct 7.
The aim of this study was to characterize glycolic acid (GA) and examine its effects on powder and flexural strength of dentin. Particle size and energy-dispersive EDS in GA powder was performed for chemical analysis. Surface tension and pH levels of ethylenediaminetetraacetic acid (EDTA), citric acid (CA), and GA solutions were evaluated at different times and temperatures. Dentin powder and mineralized dentin beams were immersed for 1 min in EDTA, CA, or GA solutions and subjected to Fourier transform infrared spectroscopy for apatite/collagen ratio analysis and 3-point flexure test, respectively. GA showed the largest particle size (μm), and its surface tension was similar to that of EDTA and CA. Surface tension decreased in solutions of higher concentrations. GA showed pH stability at all times and temperatures evaluated. The apatite/collagen ratio reduced with increased GA concentrations, while flexural strength was not significantly affected by GA concentration. GA seems a good choice as a final irrigation solution after root canal preparation.
本研究旨在对乙醇酸（GA）进行特性分析，并研究其对牙本质粉化和弯曲强度的影响。通过能谱仪（EDS）对 GA 粉末的粒径和能量进行化学分析。评估 EDTA、柠檬酸（CA）和 GA 溶液在不同时间和温度下的表面张力和 pH 值。将牙本质粉和矿化牙本质梁分别浸泡在 EDTA、CA 或 GA 溶液中 1 分钟，然后进行傅里叶变换红外光谱分析以评估磷灰石/胶原比值，以及进行三点弯曲试验以评估弯曲强度。GA 的粒径最大（μm），其表面张力与 EDTA 和 CA 相似。表面张力随着浓度的增加而降低。GA 在所有评估的时间和温度下均具有稳定的 pH 值。随着 GA 浓度的增加，磷灰石/胶原比值降低，而 GA 浓度对弯曲强度没有显著影响。GA 似乎是根管预备后作为最终冲洗液的不错选择。
