Ok Evren, Altunsoy Mustafa, Tanriver Mehmet, Çapar İsmail Davut
Department of Endodontics.
Department of Pedodontics, Faculty of Dentistry, Sifa UniversityIzmirTurkey.
Acta Biomater Odontol Scand. 2015 Apr 8;1(1):1-5. doi: 10.3109/23337931.2015.1015132. eCollection 2015 Jan.
: To evaluate the effectiveness of different irrigation solutions and ultrasonic activation of the irrigation solutions on the removal of calcium hydroxide (Ca(OH)) from the simulated immature root canals after apexification. : One-hundred and one single-rooted teeth were used. The root canals were shaped with ProTaper rotary files up to F5. Simulation of roots with immature apices was carried out using size 4 Unicore drills. An injectable Ca(OH) was injected into each root canal, and packed to the working length. Then, cotton pellets were placed over canal orifices, and apical and coronal parts of the roots were sealed with resin-modified glass ionomer cement, and light cured. Specimens were stored in distilled water for 3 months at 37°C. After 3 months, the temporary coronal seal was removed and the samples were randomly divided into: (a) saline ( = 20), (b) ultrasonic activation of saline ( = 20), (c) sodium hypochlorite (NaOCl) ( = 20), (d) ultrasonic activation of NaOCl ( = 15), (e) chlorhexidine digluconate (CHX) ( = 20) and one positive control group ( = 3) and one negative control group ( = 3). The amount of remaining Ca(OH) on the canal walls was measured under stereomicroscope with 30× magnification. Comparisons between groups were made by the non-parametric Kruskal-Wallis test and Dunn post-test at a significance level of < 0.05. : There were no significant differences among the saline, ultrasonic activation of saline, NaOCl, ultrasonic activation of NaOCl and CHX ( > 0.05) groups. : Irrigation solutions and ultrasonic activation of the irrigation solutions could not completely remove Ca(OH) from the simulated immature root canals.
评估不同冲洗液及冲洗液超声激活对根尖诱导成形术后模拟未成熟根管内氢氧化钙（Ca(OH)₂）去除效果的影响。使用101颗单根管牙。根管采用ProTaper旋转锉预备至F5。用4号Unicore钻模拟未成熟根尖的牙根。将可注射的Ca(OH)₂注入每个根管，并充填至工作长度。然后，在根管口放置棉球，用树脂改性玻璃离子水门汀封闭牙根的根尖和冠部，并光照固化。标本在37℃蒸馏水中保存3个月。3个月后，去除临时冠部封闭剂，将样本随机分为：（a）生理盐水组（n = 20），（b）生理盐水超声激活组（n = 20），（c）次氯酸钠（NaOCl）组（n = 20），（d）NaOCl超声激活组（n = 15），（e）葡萄糖酸氯己定（CHX）组（n = 20）以及1个阳性对照组（n = 3）和1个阴性对照组（n = 3）。在30倍放大的体视显微镜下测量根管壁上残留的Ca(OH)₂量。组间比较采用非参数Kruskal-Wallis检验和Dunn事后检验，显著性水平为P < 0.05。生理盐水组、生理盐水超声激活组、NaOCl组、NaOCl超声激活组和CHX组之间无显著差异（P > 0.05）。冲洗液及冲洗液的超声激活不能完全去除模拟未成熟根管内的Ca(OH)₂。
