N Shubhashini, D Krithika, Gowda Akhilesh, Nagaraja Shruthi, Mathew Rhea S, G A Nivaskumar, R Vinaychandra
Department of Conservative Dentistry and Endodontics, Rajarajeswari Dental College and Hospital, Bengaluru, IND.
Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Ramaiah University of Applied Sciences, Bengaluru, IND.
Cureus. 2024 Jun 16;16(6):e62480. doi: 10.7759/cureus.62480. eCollection 2024 Jun.
Sodium hypochlorite (NaOCl) is regarded as the most frequently used root canal irrigant. Its high surface tension prevents its penetration into complex canal anatomies. The present study assesses the contact angle and penetration depth of 2.5% NaOCl with 0.2% cetrimide and propylene glycol.
Sixty recently extracted mandibular premolars with a single root were obtained. Thirty were sectioned longitudinally, and the remaining 30 teeth were sectioned transversely. Acrylic blocks were used to mount the parts, and 5 µL of each of the following solutions was placed on the dentin surface: Group 1: 2.5% NaOCl (control), Group 2: 0.2% cetrimide + 2.5% NaOCl, and Group 3: propylene glycol + 2.5% NaOCl. Following this, contact angle analysis was made using a contact angle goniometer. We prepared and instrumented access cavities in 30 teeth to work up to the size of the ProTaper Gold F2 (Dentsply Tulsa Dental Specialties, Tulsa, OK). Samples were allocated to the three groups, and irrigation was done accordingly. They were sectioned at the coronal, middle, and apical thirds and then subjected to confocal laser scanning microscopy. The data were analyzed using a one-way ANOVA and a Tukey multiple comparison test.
Group 2 had the least contact angle (35.20°) and the highest depth of penetration (DOP; 752.409 µm) when compared to Groups 1 and 3. The DOP decreased significantly from the coronal, middle, and apical thirds. No discernible variation in the contact angle was found between the radicular and coronal portions.
0.2% cetrimide improved the efficiency of 2.5% NaOCl as an irrigant by lowering its contact angle and increasing its DOP.
次氯酸钠（NaOCl）被认为是最常用的根管冲洗剂。其高表面张力阻碍其渗入复杂的根管解剖结构。本研究评估2.5% NaOCl与0.2%西曲溴铵和丙二醇的接触角和渗透深度。
获取60颗近期拔除的单根下颌前磨牙。30颗纵向切片，其余30颗横向切片。用丙烯酸块固定各部分，在牙本质表面放置5µL以下每种溶液：第1组：2.5% NaOCl（对照组），第2组：0.2%西曲溴铵 + 2.5% NaOCl，第3组：丙二醇 + 2.5% NaOCl。之后，使用接触角测角仪进行接触角分析。在30颗牙齿上制备并预备进入腔，使其达到ProTaper Gold F2（登士柏 Tulsa 牙科专业公司，塔尔萨，俄克拉何马州）的尺寸。样本分为三组，并相应进行冲洗。在冠部、中部和根尖三分之一处切片，然后进行共聚焦激光扫描显微镜检查。使用单因素方差分析和Tukey多重比较检验分析数据。
与第1组和第3组相比，第2组的接触角最小（35.20°），渗透深度（DOP）最高（752.409µm）。DOP从冠部、中部和根尖三分之一处显著降低。在牙根和冠部之间未发现接触角有明显差异。
0.2%西曲溴铵通过降低2.5% NaOCl的接触角并增加其DOP，提高了其作为冲洗剂的效率。
