Department of Endodontics, Dental Faculty, İzmir Katip Çelebi University, İzmir, 35620, Turkey,
Lasers Med Sci. 2015 Feb;30(2):599-604. doi: 10.1007/s10103-013-1364-8. Epub 2013 Jun 22.
The aim of this study is to analyze the effect of agitation of ethylenediaminetetraacetic acid (EDTA) with diode laser at different agitation times on root dentin microhardness. Eighty-four specimens were divided randomly into seven groups, as follows: (1) distilled water, (2) 17% EDTA, (3) EDTA with 60 s ultrasonic agitation, (4) EDTA with 10 s laser agitation, (5) EDTA with 20 s laser agitation, (6) EDTA with 30 s laser agitation, and (7) EDTA with 40 s laser agitation. All of the specimens were irrigated with 5% NaOCl and distilled water except the distilled water group. Microhardness values were calculated before and after the procedures. Statistical analyses were performed using one-way ANOVA and Tukey post hoc tests. Statistically significant differences were determined between the distilled water and other groups. Also, statistically significant differences were observed between EDTA with 40 s laser agitation and EDTA, and EDTA with 10 and 20 s laser agitations. Ultrasonic agitation of EDTA affected microhardness of root dentin similar to EDTA (p > .05). All applications decreased the microhardness of root dentin when compared with distilled water. Agitation of EDTA with diode laser for 40 s caused more reduction in microhardness of root dentin when compared with EDTA.
本研究旨在分析不同搅拌时间的乙二胺四乙酸（EDTA）与二极管激光搅拌对根管牙本质显微硬度的影响。将 84 个样本随机分为 7 组，如下：（1）蒸馏水，（2）17%EDTA，（3）用 60s 超声搅拌的 EDTA，（4）用 10s 激光搅拌的 EDTA，（5）用 20s 激光搅拌的 EDTA，（6）用 30s 激光搅拌的 EDTA，（7）用 40s 激光搅拌的 EDTA。除蒸馏水组外，所有样本均用 5%次氯酸钠和蒸馏水冲洗。在处理前后计算显微硬度值。采用单因素方差分析和 Tukey 事后检验进行统计学分析。在蒸馏水和其他组之间观察到统计学显著差异。此外，在 EDTA 用 40s 激光搅拌和 EDTA 以及 EDTA 用 10s 和 20s 激光搅拌之间也观察到统计学显著差异。EDTA 的超声搅拌对根管牙本质的显微硬度的影响与 EDTA 相似（p>.05）。与蒸馏水相比，所有应用均降低了根管牙本质的显微硬度。与 EDTA 相比，EDTA 用二极管激光搅拌 40s 导致根管牙本质的显微硬度降低更多。
