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首页> 外文期刊>Ultrasonics sonochemistry >Sonochemical and high-speed optical characterization of cavitation generated by an ultrasonically oscillating dental file in root canal models
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Sonochemical and high-speed optical characterization of cavitation generated by an ultrasonically oscillating dental file in root canal models

机译：超声振荡牙锉在根管模型中产生的空化的声化学和高速光学表征

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摘要

Ultrasonically Activated Irrigation makes use of an ultrasonically oscillating file in order to improve the cleaning of the root canal during a root canal treatment. Cavitation has been associated with these oscillating files, but the nature and characteristics of the cavitating bubbles were not yet fully elucidated. Using sensitive equipment, the sonoluminescence (SL) and sonochemiluminescence (SCL) around these files have been measured in this study, showing that cavitation occurs even at very low power settings. Luminol photography and high-speed visualizations provided information on the spatial and temporal distribution of the cavitation bubbles. A large bubble cloud was observed at the tip of the files, but this was found not to contribute to SCL. Rather, smaller, individual bubbles observed at antinodes of the oscillating file with a smaller amplitude were leading to SCL. Confinements of the size of bovine and human root canals increased the amount of SL and SCL. The root canal models also showed the occurrence of air entrainment, resulting in the generation of stable bubbles, and of droplets, near the air-liquid interface and leading eventually to a loss of the liquid.
机译：超声激活灌溉利用超声振动锉，以改善在根管治疗过程中对根管的清洁。空化与这些振动锉有关，但是空化气泡的性质和特征尚未完全阐明。在这项研究中，使用敏感设备测量了这些文件周围的声致发光（SL）和超声发光（SCL），表明即使在非常低的功率设置下也会发生气蚀现象。鲁米诺摄影和高速可视化提供了有关空化气泡的时空分布的信息。在文件的顶端观察到一个大的气泡云，但是发现这对SCL没有帮助。相反，在振动锉的波腹处观察到的较小的单个气泡具有较小的振幅，这导致了SCL。限制牛和人根管的大小会增加SL和SCL的数量。根管模型还显示出夹带空气的发生，导致在气液界面附近产生稳定的气泡和液滴，最终导致液体损失。

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