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An RC Plasma Device for Sterilization of Root Canal of Teeth

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7 Author(s)
XinPei Lu ; Coll. of Electr. & Electron. Eng., Huazhong Univ. of Sci. & Technol., Wuhan ; Yinguang Cao ; Ping Yang ; Xiong, Qing
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The application of cold plasma in sterilization of a root canal of a tooth has recently attracted great attention. In this paper, a reliable and user-friendly plasma-jet device, which can generate plasma inside the root canal, is reported. The plasma can be touched by bare hands and can be directed manually by a user to place it into root canal for disinfection without causing any painful sensation. When He/O2(20%) is used as working gas, the rotational and vibrational temperatures of the plasma are about 300 K and 2700 K, respectively. The peak discharge current is about 10 mA. Preliminary inactivation experiment results show that it can efficiently kill enterococcus faecalis , one of the main types of bacterium causing failure of root-canal treatment in several minutes.

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Plasma Science, IEEE Transactions on  (Volume:37 ,  Issue: 5 )