School of Dentistry, University of Birmingham, St. Chad's Queensway, Birmingham, B4 6NN, UK.
Clin Oral Investig. 2013 May;17(4):1227-34. doi: 10.1007/s00784-012-0802-5. Epub 2012 Aug 15.
Cavitation arising within the water around the oscillating ultrasonic scaler tip is an area that may lead to advances in enhancing biofilm removal. The aim of this study is to map the occurrence of cavitation around scaler tips under loaded conditions.
Two designs of piezoelectric ultrasonic scaling probes were evaluated with a scanning laser vibrometer and luminol dosimetric system under loaded (100 g/200 g) and unloaded conditions. Loads were applied to the probe tips via teeth mounted in a load-measuring apparatus.
There was a positive correlation between probe displacement amplitude and cavitation production for ultrasonic probes. The position of cavitation at the tip of each probe was greater under loaded conditions than unloaded and for the longer P probe towards the tip.
Whilst increasing vibration displacement amplitude of ultrasonic scalers increases the occurrence of cavitation, factors such as the length of the probe influence the amount of cavitation activity generated. The application of load affects the production of cavitation at the most clinically relevant area-the tip.
Loading and the design of ultrasonic scalers lead to maximising the occurrence of the cavitation at the tip and enhance the cleaning efficiency of the scaler.
在超声震荡器工作尖周围的水中产生的空化现象可能是提高生物膜去除效率的一个研究领域。本研究旨在描绘在负载条件下震荡器工作尖周围空化现象的发生情况。
使用激光测振仪和鲁米诺剂量测定系统对两种设计的压电超声洁牙探针进行评估，分别在负载（100g/200g）和空载条件下进行评估。通过安装在负载测量装置上的牙齿向探头尖端施加负载。
超声探针的探头位移幅度与空化产生呈正相关。与空载相比，在负载条件下每个探头尖端的空化位置更大，对于较长的 P 探头，尖端处的空化位置更大。
虽然增加超声洁牙机的振动位移幅度会增加空化现象的发生，但探头长度等因素会影响产生的空化活动量。负载的应用会影响到最具临床相关性的区域——工作尖处的空化产生。
负载和超声洁牙机的设计使工作尖处的空化现象最大化，从而提高洁牙机的清洁效率。
