Yilmaz Zeliha, Basbag Berna, Buzoglu Hatice Dogan, Gümüsderelioglu Menemse
Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2011 Jan;111(1):109-14. doi: 10.1016/j.tripleo.2010.08.008.
This study was conducted to evaluate the effect of reducing the surface tension of ethylenediaminetetraacetic acid (EDTA) solutions on the wettability of root canal dentin.
Forty-two extracted teeth were sectioned at the crown, and the apical third and remaining mid-root portion was bisected longitudinally. The root halves were embedded in resin blocks. The experimental groups were treated with 17% EDTA, EDTA-T, and REDTA alone or followed by 2.5% NaOCl. Surface free energies of samples were calculated by measuring contact angles. Surface tension measurements of all solutions were performed with pendant drop method.
The addition of surfactant to the EDTA solution significantly decreased the surface tension of solutions (P < .01). Combined and single use of experimental solutions and NaOCl significantly decreased the water contact angle and increased the surface free energy of root canal dentin (P < .05). EDTA-T alone or combined with NaOCl also increased surface free energy compared with EDTA solution (P < .05).
The use of low-surface-tensioned EDTA compounds alone or in combination with NaOCl increased the wettability of root canal dentin.
本研究旨在评估降低乙二胺四乙酸（EDTA）溶液表面张力对根管牙本质润湿性的影响。
将42颗拔除的牙齿在牙冠处截断，将根尖三分之一和剩余的牙根中部纵向平分。将牙根的两半嵌入树脂块中。实验组分别单独用17%的EDTA、EDTA-T和REDTA处理，或先用这些溶液处理后再用2.5%的次氯酸钠处理。通过测量接触角来计算样品的表面自由能。所有溶液的表面张力测量均采用悬滴法。
向EDTA溶液中添加表面活性剂可显著降低溶液的表面张力（P <.01）。实验溶液与次氯酸钠联合使用和单独使用均显著降低了水接触角，增加了根管牙本质的表面自由能（P <.05）。与EDTA溶液相比，单独使用EDTA-T或与次氯酸钠联合使用也增加了表面自由能（P <.05）。
单独使用低表面张力的EDTA化合物或与次氯酸钠联合使用可增加根管牙本质的润湿性。
