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China Develops 'Plasma Needles' That Could Revolutionise Dental Treatment
Plasma is a cloud of gas broken down into a mélange of free electrons and ions, which under atmospheric pressure and temperature may increase its temperature to thousands of degrees Celsius.
However, recently physicists have created "plasma needles" that are cold enough to touch but may prove fatal to bacteria.
Now, Chinese researchers have created a device that generates cold plasma and can also measure the flow of electrons inside it. This may aid in uncovering new insights into the nature of such plasmas so they can be enhanced for biomedical use. Still, the researchers are trying to work out the best way to control cold plasma.
XinPei Lu at Huazhong University of Science and Technology, China said that majority of plasma plumes created till date have been only millimetres long, or tens of degrees hotter than room temperature, and unsuitable for medical use.
But, the latest device created by their team generates a useful 4cm long room-temperature plasma plume that one can touch safely with a bare finger.
Consisting of a high-voltage wire electrode inside a quartz tube, this new plasma plume is encased in a syringe, which can be used to channel nitrogen or helium gas. A luminous needle of plasma is created when fragments of voltage are applied to the electrode. One can also vary the length of the plume by changing the gas, its flow rate, and the applied voltage.
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More News on: Loose Teeth, Tooth Decay, Receding Gums, Tooth Discoloration, Teeth Chart, Dental Check-Up, Root Canal Treatment, Toothache, Quiz on Dental Care
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