CAJ | 학술논문

目的：比较不同温度与辅助器械对根管内玷污层的清除效果。方法：对60颗离体单根牙进行根管预备，20℃或60℃的 NaOCl 作为冲洗液，被动超声（PUI）或声波冲洗装置 EndoActiator（EA）或侧方开口冲洗针辅助冲洗，随机分组（n ＝10）：20℃-PUI 组、20℃-EA 组、20℃对照组、60℃-PUI 组、60℃-EA 组和60℃对照组。用热场发射扫描电镜观察，Hulsmann 标准评估玷污层清除效果。结果：60℃组玷污层清除效果优于20℃组（P ＜0．05）；20℃-PUI 组、20℃-EA 组效果均优于20℃对照组（P ＜0．05）。结论：NaOCl 的温度是影响玷污层清除效果的主要因素，60℃ NaOCl 比20℃ NaOCl 更有效。
목적：비교불동온도여보조기계대근관내점오층적청제효과。방법：대60과리체단근아진행근관예비，20℃혹60℃적 NaOCl 작위충세액，피동초성（PUI）혹성파충세장치 EndoActiator（EA）혹측방개구충세침보조충세，수궤분조（n ＝10）：20℃-PUI 조、20℃-EA 조、20℃대조조、60℃-PUI 조、60℃-EA 조화60℃대조조。용열장발사소묘전경관찰，Hulsmann 표준평고점오층청제효과。결과：60℃조점오층청제효과우우20℃조（P ＜0．05）；20℃-PUI 조、20℃-EA 조효과균우우20℃대조조（P ＜0．05）。결론：NaOCl 적온도시영향점오층청제효과적주요인소，60℃ NaOCl 비20℃ NaOCl 경유효。
Objective:To compare the efficacy of six different irrigation techniques on smear layer removal.Methods:60 single-rooted teeth were prepared.The root canals were irrigated with NaOCl at 20 ℃ or 60 ℃,and activated with side-vented needle,pas-sive ultrasonic irrigation (PUI)and EndoActivator (EA)irrigation techniques respectively.Then teeth were randomly divided into 6 groups(n =1 0):20 ℃-PUI group,20 ℃-EA group,20 ℃control group,60 ℃-PUI group,60 ℃-EA group and 60 ℃ control group.Smear layer was observed under thermal field emission scanning electron microscope(FE-SEM)and scored according to the cri-teria specified by Hulsmann M.Results:The smear layer removal effect in 60 ℃ groups was better than that in 20 ℃ groups (P <0.05),and better in 20 ℃-EA and 20 ℃-PUI groups than in 20 ℃ control group(P <0.05).Conclusion:The temperature of NaOCl is the main factor influencing the smear layer removal,NaOCl at 60 ℃ is more effective than that at 20 ℃.