Prado Maíra, Gusman Heloisa, Gomes Brenda P F A, Simão Renata A
Department of Metallurgic and Materials Engineering, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2011 Jun;111(6):e21-4. doi: 10.1016/j.tripleo.2011.01.014. Epub 2011 Mar 31.
The aim of this study was to evaluate the morphologic alterations on the surface of gutta-percha and Resilon cones exposed to disinfectant solutions.
Fifty-six gutta-percha and Resilon cones were used. Seven groups were analyzed: G1: control; G2, G3, and G4: 5.25% NaOCl, 2% CHX, and MTAD, respectively, without final rinse; G5, G6, and G7: the same solutions with final rinse. Then the samples were analyzed by means of scanning electron microscopy and energy dispersive spectroscopy.
Regarding the use of NaOCl without rinse, there was chloride crystal formation in all samples. When the cones were rinsed, the crystals were removed. When 2% chlorhexidine was used, no change was observed. MTAD without rinse showed the presence of a precipitate in gutta-percha cones. When the cones were rinsed, it was eliminated.
The final rinse is essential, especially when NaOCl and MTAD are used in the cones' disinfection process.
本研究旨在评估暴露于消毒溶液中的牙胶尖和热塑性树脂根管充填尖表面的形态学改变。
使用了56个牙胶尖和热塑性树脂根管充填尖。分析了七组：G1：对照组；G2、G3和G4：分别为5.25%次氯酸钠、2%氯己定和MTAD，不进行最终冲洗；G5、G6和G7：相同溶液并进行最终冲洗。然后通过扫描电子显微镜和能谱分析对样本进行分析。
关于未冲洗使用次氯酸钠的情况，所有样本中均形成了氯化物晶体。当根管充填尖冲洗后，晶体被去除。使用2%氯己定时，未观察到变化。未冲洗的MTAD在牙胶尖中显示有沉淀物。当根管充填尖冲洗后，沉淀物被消除。
最终冲洗至关重要，尤其是在根管充填尖消毒过程中使用次氯酸钠和MTAD时。
