Radeva Elka N, Mironova Jasmina V, Marinova-Takorova Mirela B
Department of Conservative Dentistry, Faculty of Dental Medicine, Medical University-Sofia, Bulgaria, Bulgaria.
J Int Soc Prev Community Dent. 2023 Aug 30;13(4):342-348. doi: 10.4103/jispcd.JISPCD_80_23. eCollection 2023 Jul-Aug.
This study aimed to compare the efficacy of three different irrigation methods in removing calcium hydroxide from curved root canals and to estimate the amount of residual medicament using microcomputed tomography.
Thirty extracted molars with curved mesial root canals, ranging from 25° to 30°, were prepared with ProTaper Next using X2 to full working length and were filled with calcium hydroxide. Teeth also were randomly divided into four groups: group 1 ( = 8)- Erbium: Yttrium-Aluminum-Garnet (Er:YAG) laser; group 2 ( = 8)-EndoActivator; group 3 ( = 8)-EndoVac; and a control group ( = 6)-negative control with no calcium hydroxide. Microcomputed tomography was used to evaluate the residual amount of filling material. Statistical analysis was performed using IBM SPSS Statistics 26, with a significance level of 0.05. Descriptive statistics, student test, and Chi-square test were applied for data analysis.
The greatest amount of residual calcium hydroxide was observed in the samples with EndoVac irrigation (0.515 mm), followed by EndoActivator (0.381 mm) and Er:YAG laser (0.121 mm). However, no statistically significant difference was observed between the groups. The greatest residual amount was observed in the apical third (0.419 mm), followed by the middle (0.050 mm) and the coronal (0.015 mm).
No statistically significant differences were observed in the efficacy of the tested techniques for removing calcium hydroxide from curved root canals, whereas a significant difference was observed in the distribution of residual material depending on the technique used. The removal of the calcium hydroxide was more effective in the coronal and middle third of the canal. The greatest residual material was found in the apical portion of the root canal.
本研究旨在比较三种不同冲洗方法从弯曲根管中去除氢氧化钙的效果，并使用微型计算机断层扫描估计残留药物的量。
选取30颗近中根管弯曲度在25°至30°之间的离体磨牙，使用ProTaper Next从X2预备至工作长度，并充填氢氧化钙。牙齿随机分为四组：第1组（n = 8）-铒：钇铝石榴石（Er:YAG）激光；第2组（n = 8）-EndoActivator；第3组（n = 8）-EndoVac；以及对照组（n = 6）-未使用氢氧化钙的阴性对照。使用微型计算机断层扫描评估充填材料的残留量。采用IBM SPSS Statistics 26进行统计分析，显著性水平为0.05。数据分析采用描述性统计、学生t检验和卡方检验。
EndoVac冲洗的样本中观察到的氢氧化钙残留量最大（0.515毫米），其次是EndoActivator（0.381毫米）和Er:YAG激光（0.121毫米）。然而，各组之间未观察到统计学上的显著差异。根尖三分之一处的残留量最大（0.419毫米），其次是中部（0.050毫米）和冠部（0.015毫米）。
在从弯曲根管中去除氢氧化钙的测试技术效果方面未观察到统计学上的显著差异，而根据所使用的技术，残留材料的分布存在显著差异。氢氧化钙在根管冠部和中部三分之一处的去除更为有效。根管根尖部分的残留材料最多。
