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医学论文范文:超声荡洗对根管清洁效果的扫描电镜观察
【摘要】 目的：用扫描电镜的方法评价根管超声荡洗的清洁效果。方法：选择单根管前磨牙20颗，随机分为注射器冲洗组和超声荡洗组。机用镍钛器械预备根管后，两组最后选用不同方法冲洗根管。在根管的3个不同部位采用扫描电镜记录牙本质小管开口与玷污层情况。结果：A组牙本质小管开口数多于B组(P<0.05);两组相应部位比较，冠1/3处牙本质小管开口数之间的差异无统计学意义(P>0.05)，A组在根中1/3和根尖1/3的牙本质小管开口数明显多于B组(P<0.05)。结论：用17%EDTA超声根管冲洗效果优于注射器冲洗。
【关键词】 牙本质小管 超声荡洗 扫描电镜 玷污层
A scanning electron microscopic (SEM) evaluation of efficacy of ultrasonic irragation for root canal
GUO Jinjie, WU Peiling, XIE Fenglian
(Department of Stomatology， Second Affiliated Hospital，Xinjinag Medical University，Urumqi 830028， China)
Abstract: Objective: Using scanning electron microscope(SEM) to investigate efficacy of ultrasonic irrigation. Methods: Twenty single extracted teeth were randomly divided into two groups with ten teeth in each group (ultrasonic irrigation group and syringe irrigation group). The final irrigation choose diffirent way, the scanning electron microscope was used to evaluate for the number of visible open dentinal tubules and smear layers. Result: The number of visible open dentinal tubules in group A are significantly greater than that in group B, In the respective third, cleaning of group A and B in the coronal third is not different. But cleaning of group A is better than group B in middle third and apical third parts. Conclusion: Ultrasonic irrigation is better than syringe irrigation in root canal therapy.
Key words: dentinal tubules; ultrasonic irrigation; the sanning electron microscope (SEM); the smear layer
根管治疗术是牙髓病和根尖周病最有效的治疗手段[1]，而根管冲洗对根管系统的清理和消毒起着重要作用，是根管预备过程中不可缺少的步骤[2]。在临床上根管冲洗通常采用人工注射器冲洗的方法，这种传统的冲洗方法使冲洗剂的渗透及去除碎屑的作用均得不到充分发挥[3]。国内外的研究表明，根管超声冲洗是提高根管清理效果的较好手段，但仍存在不同的观点。本实验的目的是用扫描电镜的方法评价根管超声冲洗的效果，以期为根管超声冲洗技术的推广应用及提高根管充填的质量提供依据医学 全在.线提供www.lindalemus.com。
1材料与方法
1.1样本的收集和分组收集2007年12月～2008年8月我院及第一附属医院口腔科因牙周病及正畸拔除的单根管前磨牙20颗，存储于0.9%氯化钠溶液中备用。20颗牙随机分为两组，A组超声荡洗组，B组普通注射器组。
