Bakthavatchalam Balakrishnan, Ranjani Muthukrishnan Sudharshana, Amudhalakshmi Krishnan
Department of Conservative Dentistry and Endodontics, Tamil Nadu Government Dental College and Hospital, Chennai, Tamil Nadu, India.
Contemp Clin Dent. 2019 Jul-Sep;10(3):542-547. doi: 10.4103/ccd.ccd_160_19.
This study aims to compare the cleaning efficacy of root canal walls using two rotary single file systems: self-adjusting file (SAF) and WaveOne (WO).
Forty extracted human premolars with similar range of canal curvature were selected, decoronated, working length determined and roots were divided into two groups of 20 samples each: Group I - SAF and Group II - WO. All root canals were irrigated with 3% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA). The roots were sectioned longitudinally and subjected to scanning electron microscopic examination. The amount of debris and smear layer was evaluated using five score index at coronal, middle and apical third levels. Statistical analysis was performed using the Chi-square test and significance was set at a < 0.05.
Statistically significant difference was observed between the groups in cleaning the apical third. Group I (SAF) showed better canal cleanliness compared to Group II (WO) in the apical third.
Within the limitations of this study, SAF in combination with 3% NaOCl and 17% EDTA irrigating solution had significantly better cleaning efficacy in the apical third of root canals when compared to WO rotary file system.
本研究旨在比较两种旋转单根管系统，即自调式锉（SAF）和WaveOne（WO）对根管壁的清洁效果。
选取40颗根管弯曲程度相近的拔除人类前磨牙，去除牙冠，确定工作长度，将牙根分为两组，每组20个样本：第一组 - SAF，第二组 - WO。所有根管均用3%次氯酸钠（NaOCl）和17%乙二胺四乙酸（EDTA）冲洗。将牙根纵向切片并进行扫描电子显微镜检查。在冠部、中部和根尖三分之一处，使用五分制指数评估碎屑和玷污层的量。采用卡方检验进行统计分析，显著性设定为α < 0.05。
两组在清洁根尖三分之一处存在统计学显著差异。与第二组（WO）相比，第一组（SAF）在根尖三分之一处显示出更好的根管清洁度。
在本研究的局限性范围内，与WO旋转锉系统相比，SAF联合3% NaOCl和17% EDTA冲洗液在根管根尖三分之一处具有显著更好的清洁效果。
