抗菌冲洗液对根管牙本质脱矿的影响。
Decalcifying effects of antimicrobial irrigating solutions on root canal dentin.
机构信息
Department of Stomatology, School of Dentistry, Campus de Cartuja, Colegio Máximo s/n, E-18071, Granada, Spain.
出版信息
Med Oral Patol Oral Cir Bucal. 2013 Jan 1;18(1):e158-61. doi: 10.4317/medoral.18207.
OBJECTIVE
The aim of this study was to determine the decalcifying efficacy of 7% maleic acid (MA), 2% chlorhexidine (CHX), and combinations of 7% MA + 0.2% cetrimide (CTR) and 2% CHX + 0.2% CTR, in four time periods.
STUDY DESIGN
Four specimens per tooth were obtained from a 2-mm thick slice of the cervical third of the root of ten human incisors. At 1, 2, 3 and 5 minutes of immersion, the concentrations of Ca2+ were measured by atomic absorption spectrophotometry. The results were analyzed using the Mann-Whitney U-test.
RESULTS
Statistically significant differences were seen for the extracted calcium in all time periods. The amount of calcium extracted by 7% MA was the highest at all four immersion times, followed by 7% MA + 0.2% CTR. Two percent CHX and its combination with 0.2% CTR extracted virtually no calcium.
CONCLUSIONS
The decalcifying capacity of 7% MA and 2% CHX diminished when combined with 0.2% CTR.
目的
本研究旨在确定 7%马来酸（MA）、2%洗必泰（CHX）以及 7%MA+0.2%西曲溴铵（CTR）和 2%CHX+0.2%CTR 组合在四个时间段内的脱钙效果。
研究设计
从十个人工切取的、厚 2 毫米的切牙颈三分之一根部薄片中，每个牙齿获得四个标本。在 1、2、3 和 5 分钟的浸泡时间后，通过原子吸收分光光度法测量 Ca2+浓度。使用曼-惠特尼 U 检验对结果进行分析。
结果
在所有时间段，提取的钙均有统计学显著差异。7%MA 在所有四个浸泡时间内提取的钙量最高，其次是 7%MA+0.2%CTR。2%CHX 及其与 0.2%CTR 的组合几乎没有提取到钙。
结论
当与 0.2%CTR 结合时，7%MA 和 2%CHX 的脱钙能力会减弱。
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