Activation of ethylenediaminetetraacetic acid by a 940 nm diode laser for enhanced removal of smear layer.
Activation of ethylenediaminetetraacetic acid by a 940 nm diode laser for enhanced removal of smear layer.
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通过 940 nm 二极管激光激活乙二胺四乙酸，以增强污迹层的去除。
DOI：
10.1111/aej.12039
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
L. Walsh
中科院分区：
文献类型：
--
作者：
M. Lagemann;R. George;Lei Chai;L. Walsh
对于中红外铒激光器，用溴化十六烷基三甲铵（EDTAC）对乙二胺四乙酸进行激光增强，以前已被证明可以增加玷污层的去除。本研究使用近红外脉冲940 nm激光通过普通光纤尖端递送到15%EDTAC或3%过氧化氢中来评估EDTAC活化的效率。用旋转锉预备4组10个单根的根管，对照有无玷污层。激光治疗后（80 mJ脉冲（-1），50 Hz，6个周期，10 s），牙根分裂和根尖，中间和冠状三分之一的根管进行了检查，使用扫描电子显微镜，与牙本质小管的面积确定了一个有效的定量图像分析方法。激光EDTAC大大提高了玷污层去除，而激光到过氧化物给出了最小的玷污层去除。所使用的激光方案比使用EDTAC与次氯酸钠（NaOCl）的“金标准”方案更有效地去除玷污层。此外，激光还可以通过光热消毒提供益处。需要进一步的研究来优化使用其他波长的近红外二极管激光器的冲洗液激活方案。
Laser enhancement of ethylenediaminetetraacetic acid with cetrimide (EDTAC) has previously been shown to increase removal of smear layer, for middle-infrared erbium lasers. This study evaluated the efficiency of EDTAC activation using a near-infrared-pulsed 940 nm laser delivered by plain fibre tips into 15% EDTAC or 3% hydrogen peroxide. Root canals in 4 groups of 10 single roots were prepared using rotary files, with controls for the presence and absence of smear layer. After laser treatment (80 mJ pulse(-1) , 50 Hz, 6 cycles of 10 s), roots were split and the apical, middle and coronal thirds of the canal were examined using scanning electron microscopy, with the area of dentine tubules determined by a validated quantitative image analysis method. Lasing EDTAC considerably improved smear layer removal, while lasing into peroxide gave minimal smear layer removal. The laser protocol used was more effective for smear layer removal than the 'gold standard' protocol using EDTAC with sodium hypochlorite (NaOCl). In addition, lasers may also provide a benefit through photothermal disinfection. Further research is needed to optimise irrigant activation protocols using near-infrared diode lasers of other wavelengths.