PDF(Pubmed)
Abstract：
OBJECTIVE: The aim of this study was to evaluate the removal efficiency of PRMTA and ECMPremixed applied to the coronal third according to the RET by UI and to examine the effect of different solutions on material removal.
METHODS: 40 permanent upper central teeth were used to simulate immature teeth. The samples were irrigated with 1.5% NaOCl and calcium hydroxide was placed. Samples were incubated in PBS. Then irrigation was done with 17% EDTA, the samples were randomly divided into 2 groups (n = 20):Group 1: PRMTA, Group 2: ECM Premixed. The materials were placed in the samples. Then the samples were scanned with micro-CT. Materials were removed by UI. Micro-CT scan of the samples was performed. Each material group was divided into 2 subgroups (n = 10): Group1 was MTAD, group2 was irrigated with 10% CA; then micro-CT was performed. Obtained images were positioned in DataViewer and analyzed with CTAn. The obtained data were statistically analyzed in IBM SPSS 25. The significance level was determined as 5%.
RESULTS: There was no significant difference between the initial volumes of the materials (p > 0.05). The amount of the remaining material after UI was significantly higher in the PRMTA (0.7471%) group compared to the ECM Premixed (0.0093%). There was no significant difference in terms of remaining material after irrigation with MTAD and CA in both groups (p > 0.05).
CONCLUSIONS: A great deal of the materials were removed by UI under the operation microscope. ECM Premixed was removed more effectively compared to the PRMTA. And, acidic solutions did not provide any additional benefit in material removal.
METHODS: 40 permanent upper central teeth were used to simulate immature teeth. The samples were irrigated with 1.5% NaOCl and calcium hydroxide was placed. Samples were incubated in PBS. Then irrigation was done with 17% EDTA, the samples were randomly divided into 2 groups (n = 20):Group 1: PRMTA, Group 2: ECM Premixed. The materials were placed in the samples. Then the samples were scanned with micro-CT. Materials were removed by UI. Micro-CT scan of the samples was performed. Each material group was divided into 2 subgroups (n = 10): Group1 was MTAD, group2 was irrigated with 10% CA; then micro-CT was performed. Obtained images were positioned in DataViewer and analyzed with CTAn. The obtained data were statistically analyzed in IBM SPSS 25. The significance level was determined as 5%.
RESULTS: There was no significant difference between the initial volumes of the materials (p > 0.05). The amount of the remaining material after UI was significantly higher in the PRMTA (0.7471%) group compared to the ECM Premixed (0.0093%). There was no significant difference in terms of remaining material after irrigation with MTAD and CA in both groups (p > 0.05).
CONCLUSIONS: A great deal of the materials were removed by UI under the operation microscope. ECM Premixed was removed more effectively compared to the PRMTA. And, acidic solutions did not provide any additional benefit in material removal.
摘要：
目的：本研究的目的是根据UI的RET评估PRMTA和ECMPremixed应用于冠状第三号的去除效率，并检查不同溶液对材料去除的影响。
方法：使用40颗永久性上中央牙齿模拟未成熟牙齿。用1.5%NaOCl冲洗样品并放置氢氧化钙。将样品在PBS中孵育。然后用17%的EDTA进行灌溉，将样本随机分为2组(n=20):第1组:PRMTA,组2:ECM预混合。将材料置于样品中。然后用显微CT扫描样品。材料被UI删除。进行样品的微CT扫描。每个材料组分为2个亚组（n=10）：组1为MTAD，第2组用10%CA灌注;然后进行显微CT。将获得的图像放置在DataViewer中并用CTAn分析。获得的数据在IBMSPSS25中进行统计分析。显著性水平确定为5%。
结果：材料的初始体积之间没有显着差异（p>0.05）。与ECM预混合(0.0093%)相比,PRMTA(0.7471%)组UI后剩余材料的量显著更高。两组在用MTAD和CA灌洗后的剩余材料方面没有显着差异（p>0.05）。
结论：在手术显微镜下通过UI去除大量材料。与PRMTA相比,ECM预混物被更有效地去除。And,酸性溶液在材料去除方面没有提供任何额外的益处。
方法：使用40颗永久性上中央牙齿模拟未成熟牙齿。用1.5%NaOCl冲洗样品并放置氢氧化钙。将样品在PBS中孵育。然后用17%的EDTA进行灌溉，将样本随机分为2组(n=20):第1组:PRMTA,组2:ECM预混合。将材料置于样品中。然后用显微CT扫描样品。材料被UI删除。进行样品的微CT扫描。每个材料组分为2个亚组（n=10）：组1为MTAD，第2组用10%CA灌注;然后进行显微CT。将获得的图像放置在DataViewer中并用CTAn分析。获得的数据在IBMSPSS25中进行统计分析。显著性水平确定为5%。
结果：材料的初始体积之间没有显着差异（p>0.05）。与ECM预混合(0.0093%)相比,PRMTA(0.7471%)组UI后剩余材料的量显著更高。两组在用MTAD和CA灌洗后的剩余材料方面没有显着差异（p>0.05）。
结论：在手术显微镜下通过UI去除大量材料。与PRMTA相比,ECM预混物被更有效地去除。And,酸性溶液在材料去除方面没有提供任何额外的益处。
