Department of Endodontics, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil.
Braz Oral Res. 2010 Jan-Mar;24(1):15-20. doi: 10.1590/s1806-83242010000100003.
The aim of this study was to assess qualitatively, by means of SEM images, the cleaning of the dentin walls of root canals after chemical-surgical preparation using Endo-PTC cream with 0.5% and 1% sodium hypochlorite and different final irrigating solutions. Seventy-two single-rooted human teeth were divided into eight groups and prepared using Endo-PTC cream with sodium hypochlorite (NaOCl) at different concentrations, and irrigated with NaOCl at different concentrations. Final irrigation was performed with either EDTA-T or EDTA-C. The best results were obtained with Group 1, followed by Groups 5, 2, 7, 8, 3, 6 and 4. We can conclude that the use of 0.5% NaOCl during instrumentation and final flush of the root canals was more efficient in cleaning than was 1% sodium hypochlorite. EDTA-T was more efficient in removing smear layer than EDTA-C, and the cervical third presented better cleaning of the root canal walls than did the middle third, which showed cleaner dentin walls than the apical third.
本研究旨在通过 SEM 图像定性评估，在用 0.5%和 1%次氯酸钠和不同最终冲洗液的 Endo-PTC 乳膏进行化学-机械预备后，根管牙本质壁的清洁情况。将 72 颗单根人牙分为 8 组，用不同浓度的次氯酸钠（NaOCl）进行 Endo-PTC 乳膏处理，并使用不同浓度的 NaOCl 进行最终冲洗。最终冲洗使用 EDTA-T 或 EDTA-C。结果显示，第 1 组效果最好，其次是第 5、2、7、8、3、6 和 4 组。我们可以得出结论，在器械预备和根管最终冲洗过程中使用 0.5%的次氯酸钠比 1%的次氯酸钠更有效。EDTA-T 比 EDTA-C 更有效地去除玷污层，且根管颈段的牙本质壁清洁程度优于根管中段，根管中段的牙本质壁清洁程度又优于根尖段。
