【作者】 马昂； 王成坤； 孟秀萍； 王颖艺； 孙梦瑶；

【Author】 MA Ang;WANG Cheng-kun;MENG xiu-ping;WANG ying-yi;SUN meng-yao;Department of Endodontic, Stomatology Hospital, Jilin University;

【机构】 吉林大学口腔医院牙体牙髓病科；

【摘要】 目的:探讨两种Er:YAG激光活化冲洗模式与超声荡洗对氢氧化钙清除效果和根尖封闭性能的影响,为临床操作提供理论依据。方法:将收集的80颗离体牙截冠预备后充填氢氧化钙糊剂。根据不同冲洗技术将所有样本随机分为4组(n=20):A组(超声荡洗+NaOCl溶液)、B组(PIPS+NaOCl溶液)、C组(SWEEPS+NaOCl溶液)、D组是阴性对照组,预备后不充填氢氧化钙。实验1:各组随机选择10个样本纵剖、SEM观察、评分。实验2:各组剩余样本进行根管充填、染料渗透实验。结果:在冠部1/3,PIPS组和SWEEPS组对氢氧化钙的清除效果优于超声组(P<0.05);而在根中1/3,仅SWEEPS组对氢氧化钙的清除效果优于超声组(P<0.05);在根尖1/3,三组对氢氧化钙清除效果的比较差异无统计学意义(P>0.05)。PIPS组和SWEEPS组在冠部1/3、根中1/3、根尖1/3对氢氧化钙清除效果比较差异均无统计学意义(P>0.05)。SEM观察:对照组中,牙本质小管暴露清晰可见;整体来看,PIPS组和SWEEPS组比超声组有更少的氢氧化钙残留。实验2中,单因素方差分析结果显示:各组之间的染料渗透长度无统计学差异(P>0.05)。显微镜下观察:与对照组相比,三个实验组的渗透长度有增加的趋势,但统计数据表明对照组与实验组之间无统计学差异(P>0.05),且各实验组之间渗透长度也无统计学差异(P>0.05)。结论:1、PIPS技术和SWEEPS技术对根管中上部的氢氧化钙清除效果优于超声荡洗,但三种技术在根尖1/3无明显差别;2、PIPS技术和SWEEPS技术对氢氧化钙的清除能力相当。更多还原

【Abstract】 Objectives:To explore the effects of two Er:YAG laser activation irrigation modes and ultrasonically activated irrigation(UAI) on the removal effect of calcium hydroxide and the apical sealing ability,so as to provide a theoretical basis for the clinical operation.Method:The cut crowns of 80 isolated teeth were prepared and filled with calcium hydroxide paste.According to different irrigaton techniques,all samples were randomly divided into 4 groups(n=20):group A(UAI+NaOCl),group B(PIPS+NaOCl),group C(SWEEPS+NaOCl),group D is a negative control group,and calcium hydroxide is not filled after preparation.Experiment 1:Each group randomly selected 10 longitudinal sections of samples,SEM observation,and scoring.Experiment 2:The remaining samples of each group were subjected to root canal filling and dye penetration experiments.Results:PIPS and SWEEPS removed more calcium hydroxide than UAI in the cervical third(P<0.05).While in the middle third,only SWEEPS removed more calcium hydroxide than UAI(P<0.05).The apical third did not show significant differences among experimental groups(P>0.05).There was no statistically significant difference between PIPS and SWEEPS in the removal of calcium hydroxide in the cervical,middle and apical thirds(P>0.05).SEM observation:In the control group,the dentin tubules were clearly exposed.Overall,PIPS and SWEEPS had less calcium hydroxide residues than the UAI.In experiment 2,the results of one way-ANOVA showed that there was no statistical difference in the dye penetration length among groups(P>0.05).Observation under the microscope:Compared with the control group,the penetration length of the three experimental groups has an increasing trend,but the statistical data shows that there is no statistical difference between the control group and the experimental group(P>0.05),and there was no statistical difference in the penetration length among experimental groups(P>0.05).Conclusion:1.PIPS and SWEEPS have better effect on the removal of calcium hydroxide in the upper part of the root canal than UAI,but the three technologies have no obvious difference in the apical third;2.PIPS and SWEEPS have an effect on hydroxide The ability to remove calcium is comparable.更多还原