Gorduysus Melahat, Yilmaz Zeliha, Gorduysus Omer, Atila Burcu, Karapinar Senem Oransal
Department of Endodontics, Hacettepe University, Faculty of Dentistry, Sihhiye Ankara, Turkey.
J Conserv Dent. 2012 Oct;15(4):367-71. doi: 10.4103/0972-0707.101909.
To evaluate the effectiveness of Canal Brush technique removal Ca(OH)(2) from the root canal system using Scanning Electron Microscope (SEM).
Eighteen teeth were instrumented up to #40 and dressed with Ca(OH)(2). Ca(OH)(2) was removed with master apical file (MAF) (Group 1, n:6) and CanalBrush technique (Group 2, n:6). Six teeth served as positive and negative controls. The roots were splited in the buccolingual direction and prepared for SEM examination. Two examiners evaluated the wall cleanliness then statistical analysis was performed by Mann-Whitney U and Friedman tests.
Differences in cleanliness were observed between Group 1 and Group 2 in the apical thirds (P=0.002). In the coronal and middle thirds, there were no differences between the two groups.
It is essential to re-instrument the root canal walls using instrumentation techniques while irrigating with NaOCl and EDTA combination. The Canal Brush technique results in the packing effect of the Ca(OH)(2) through to the apex.
使用扫描电子显微镜（SEM）评估根管刷技术从根管系统中去除氢氧化钙（Ca(OH)₂）的效果。
18颗牙齿预备至40号锉并封入Ca(OH)₂。分别用主尖锉（MAF）（第1组，n = 6）和根管刷技术（第2组，n = 6）去除Ca(OH)₂。6颗牙齿作为阳性和阴性对照。将牙根沿颊舌方向劈开并制备用于SEM检查。两名检查者评估根管壁清洁度，然后通过曼-惠特尼U检验和弗里德曼检验进行统计分析。
第1组和第2组在根尖三分之一处的清洁度存在差异（P = 0.002）。在冠部和中部三分之一处，两组之间没有差异。
在用次氯酸钠（NaOCl）和乙二胺四乙酸（EDTA）联合冲洗时，使用器械技术对根管壁进行再预备至关重要。根管刷技术可使Ca(OH)₂一直填充至根尖。
