器械和冲洗时间对次氯酸钠清除根管玷污层效果的影响

来源 :首都食品与医药 | 被引量 : 0次 | 上传用户:guobihuai
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
目的应用3%Na OCl作为基础冲洗液,17%EDTA作为终末冲洗液,分别配合PUI或EA或侧方开口冲洗针辅助进行根管冲洗30秒或60秒,比较根管玷污层的清除效果。方法将60颗离体牙均在距根尖15mm处截冠。用ISO#10 K-file疏通根管,在K-file尖端刚从根尖孔露出时调整固定参考点,记录止动片到器械尖端的距离,将此距离减去1mm定为工作长度(WL)。根据所用冲洗技术的不同分6组,扫描电镜观察,采用多因素分析的t检验进行数据分析,检验水准设置在a=0.05。所有统计分析均由SAS9.2完成。结果被动超声或Endoactivator辅助Na OCl进行根管冲洗比仅使用侧方开口冲洗针能更有效地去除玷污层。结论本研究表明所有冲洗方案根尖区玷污层清除效果都比较差,均不能完全清除玷污层。 Objective To compare the removal efficiencies of root canal smear with 3% Na OCl as the base irrigation solution and 17% EDTA as the terminal irrigation solution, with PUI or EA or lateral opening irrigation needles for root canal irrigation for 30 seconds or 60 seconds respectively . Methods Sixty isolated teeth were crowned at a distance of 15mm from the root tip. The root canal was dredged with ISO # 10 K-file and the fixed reference point was adjusted as soon as the tip of the K-file was exposed from the apical foramina. The distance from the stop to the tip of the instrument was recorded. The distance minus 1mm was defined as the working length (WL ). According to the different rinse technology used in 6 groups, scanning electron microscopy, multivariate analysis using t test data analysis, the test level set at a = 0.05. All statistical analysis by SAS9.2 completed. Results Passive sonography or Endoactivator assisted Na OCl for root canal irrigation was more effective than smeared layer only using lateral open-ended irrigation needles. Conclusions This study shows that the removal of smeared layers in the apex area of ​​all irrigation protocols is relatively poor and does not completely remove the smear layer.
其他文献
美国的公司治理结构模式是一种比较现代化的公司治理模式,本文在探讨美国公司治理结构模式特点的基础上,进一步研究其存在的优势与不足,以期为构建我国的公司治理结构模式提
【摘 要】现代信息技术以开放性、综合性、及时性和高效性等优势进入课堂,打破了传统的数学课堂教学模式的束缚,使教育的内容、手段和方法发生了根本性的变革。教育信息化的实现成为各个学校提升教育科研内涵的重要举措。  【关键词】学习习惯;实践能力;创造精神;学习兴趣;德育教育  1、引言  随着新课程改革在教学实践领域的不断深入开展,教育在一步步向着更加科学理性的方向发展,这对从事小学数学教学工作的教师提