Ballal V, Rao S, Al-Haj Husain N, Özcan M
Department of Conservative Dentistry & Endodontics, Manipal College of Dental Sciences, Manipal University, Manipal, Karnataka, India.
University of Bern, School of Dental Medicine, Department of Reconstructive Dentistry and Gerodontology, Switzerland.
Eur J Prosthodont Restor Dent. 2019 Aug 29;27(3):97-102. doi: 10.1922/EJPRD_01817Husain06.
This study evaluated different irrigation methods in smear layer removal from the root canal walls using maleic acid (MA). Maxillary anterior teeth (N=30, n=10 per group) were decoronated, canals were enlarged with Protaper (size F4) and allocated to three groups: EndoUltra: 2.5 ml of 7% MA was irrigated for 30 s, followed by EndoUltra activation for 30 s; EndoSafe: EndoSafe irrigation system was used for 1 minute using 5 ml of 7% MA; Side-vented needle: 30 gauge needle irrigation was performed for 1 min using 5 ml of 7% MA. After SEM analysis, the inter-examiner reliability was verified using Kendall's Co-efficient and data were analyzed using Pearson Chi-Square test. No statistical significant differences were found between the two examiners (p⟩0.05). In intra-group comparison, needle and EndoSafe irrigation demonstrated significantly better smear layer removal at middle third of the root canal system (p⟨0.05) when compared to apical third. In inter-group comparison, smear layer was minimally removed with needle irrigation. In the apical third, EndoUltra group removed smear layer more effectively. Endosafe needle irrigation in combination with 7% MA removed the smear layer in the root canal at best, while the EndoUltra performed the best at the apical third of the root.
本研究评估了使用马来酸（MA）从根管壁去除玷污层的不同冲洗方法。选取上颌前牙（N = 30，每组n = 10），截冠后，用Protaper（F4号）扩大根管，并分为三组：EndoUltra组：用2.5 ml 7%的MA冲洗30秒，随后进行EndoUltra激活30秒；EndoSafe组：使用EndoSafe冲洗系统，用5 ml 7%的MA冲洗1分钟；侧孔针组：用30号针，用5 ml 7%的MA冲洗1分钟。经过扫描电子显微镜分析后，使用肯德尔系数验证检查者间的可靠性，并使用Pearson卡方检验分析数据。两位检查者之间未发现统计学显著差异（p＞0.05）。在组内比较中，与根尖三分之一相比，针管冲洗和EndoSafe冲洗在根管系统中三分之一处的玷污层去除效果明显更好（p＜0.05）。在组间比较中，针管冲洗去除的玷污层最少。在根尖三分之一处，EndoUltra组去除玷污层的效果更有效。Endosafe针管冲洗联合7%的MA在根管中去除玷污层的效果最佳，而EndoUltra在根尖三分之一处表现最佳。
