| 摘要 |
<p>A device for the detection of plaque on teeth or dentures situated in a conductive fluid, particularly during the course of a cleaning operation, the device having at least one electrode (9) provided with external insulation and having a conductive tip (8) which can be placed onto the surface of a tooth (5), a counter-electrode (13) having an electrical connection to the fluid (17), a power source (12) being connected to the electrode (9) and counter-electrode (13), a measuring device (18) being located between the power source (12) and electrode (9) or counter-electrode (13), the measuring device determining the electrical impedance between the electrode (9) and counter-electrode (13), and an evaluation device (19) and/or indicator device (20) which processes and/or indicates the values measured.</p> |
