Yamashita J C, Tanomaru Filho M, Leonardo M R, Rossi M A, Silva L A B
School of Dentistry, Sacred Heart University, Bauru, Brazil.
Int Endod J. 2003 Jun;36(6):391-4. doi: 10.1046/j.1365-2591.2003.00656.x.
To evaluate in vitro the cleaning of root-canal walls after irrigation with different irrigants.
A total of 36 recently extracted human teeth were divided into four experimental groups according to the irrigating solution used: saline; 2% chlorhexidine; 2.5% sodium hypochlorite; and 2.5% sodium hypochlorite + EDTA. The cleaning of the apical, middle and coronal thirds of the root canals was evaluated by scanning electron microscope examination using a 4-point scoring system.
The best cleaning was obtained using 2.5% sodium hypochlorite and EDTA, followed by 2.5% sodium hypochlorite only (P < 0.05), whose cleaning was similar to chlorhexidine only in the cervical third. Cleaning by saline and 2% chlorhexidine was worse than the other two groups and was similar in all thirds. Better cleaning was found in the cervical and middle thirds for all groups with the worst results in the apical third.
The apical third of the root canals was not cleaned as well as the middle and coronal thirds. Cleaning by chlorhexidine and saline was inferior compared to the cleaning by sodium hypochlorite with and without EDTA.
在体外评估使用不同冲洗剂冲洗后根管壁的清洁情况。
根据所使用的冲洗液，将总共36颗近期拔除的人牙分为四个实验组：生理盐水；2%洗必泰；2.5%次氯酸钠；以及2.5%次氯酸钠+乙二胺四乙酸（EDTA）。使用4分评分系统通过扫描电子显微镜检查评估根管根尖、中部和冠部三分之一的清洁情况。
使用2.5%次氯酸钠和EDTA时清洁效果最佳，其次是仅使用2.5%次氯酸钠（P<0.05），其清洁效果仅在颈部三分之一处与洗必泰相似。生理盐水和2%洗必泰的清洁效果比其他两组差，且在所有三分之一处效果相似。所有组在颈部和中部三分之一处的清洁效果较好，在根尖三分之一处效果最差。
根管的根尖三分之一没有中部和冠部三分之一清洁得好。与使用和不使用EDTA的次氯酸钠清洁相比，洗必泰和生理盐水的清洁效果较差。
