Plasmas in Tooth Root Canal

Using the plasma generated inside the root canal rather than the afterglow of the plasma will significantly improve the inactivation efficiency. In this paper, images of three kinds of atmospheric-pressure low-temperature plasma devices driven by different power supplies in the tooth root canal are reported. The images of an R-needle device driven by a dc power supply inside the root canal using different gases (He, Ar, and surrounding air) are also presented.