Passarinho-Neto Jarbas Gonçalves, Marchesan Melissa Andréia, Ferreira Rafael Brandão, Silva Ricardo Gariba, Silva-Sousa Yara Teresinha Correa, Sousa-Neto Manoel D
School of Dentistry, University of Ribeirão Preto, UNAERP, Ribeirão Preto, SP, Brazil.
Aust Endod J. 2006 Dec;32(3):123-8. doi: 10.1111/j.1747-4477.2006.00035.x.
The cleaning capacity of rotary Ni-Ti instrumentation using Profile GT files, coupled with irrigation energised by ultrasound, was evaluated. Thirty-six human mandibular incisors were instrumented in vitro using the crown-down technique with the Profile GT system to 1 mm from the anatomical apex to a size 30.04 taper file. The instrumented teeth were then divided randomly into four groups where various final irrigations were used: Group I: 100 ml of 1% NaOCl with a Luer-Lok syringe (control group); Group II, Group III and Group IV: final irrigation with 100 ml of 1% NaOCl energised by ultrasound for 1, 3 and 5 min, respectively. After biomechanical preparation, the apical thirds of the roots were submitted to histological processing and examination. The specimens were analysed at 40x magnification and the images submitted to morphometric analysis with an integration grid. anova showed a statistically significant difference (P < 0.01) between the irrigation techniques. Group I (Luer-Lok syringe) showed the highest percentage of debris (35.81 +/- 4.49) and was statistically different from the other groups energised by ultrasound: Group II (27.28 +/- 4.49), Group III (24.39 +/- 5.72) and Group IV (18.46 +/- 5.25). It was concluded that rotary instrumentation using Ni-Ti files associated with final irrigation of 1% NaOCl energised by ultrasound leads to better debris removal from the apical third of mesio-distally flattened root canal.
评估了使用Profile GT锉进行旋转镍钛器械预备，并结合超声激活冲洗的清洁能力。采用冠向下技术，使用Profile GT系统对36颗人下颌切牙进行体外预备，从解剖根尖向冠方预备至距根尖1 mm，使用30.04锥度的锉。然后将预备后的牙齿随机分为四组，采用不同的最终冲洗方式：第一组：用鲁尔锁注射器注入100 ml 1%次氯酸钠（对照组）；第二组、第三组和第四组：分别用超声激活1%次氯酸钠100 ml进行最终冲洗1、3和5分钟。生物力学预备后，将牙根的根尖三分之一进行组织学处理和检查。标本在40倍放大倍数下进行分析，并使用积分网格对图像进行形态计量分析。方差分析显示冲洗技术之间存在统计学显著差异（P < 0.01）。第一组（鲁尔锁注射器）的碎屑百分比最高（35.81 +/- 4.49），与其他超声激活组在统计学上有差异：第二组（27.28 +/- 4.49）、第三组（24.39 +/- 5.72）和第四组（18.46 +/- 5.25）。得出结论，使用镍钛锉进行旋转器械预备并结合超声激活1%次氯酸钠进行最终冲洗，能更好地清除近远中扁平根管根尖三分之一处的碎屑。
