Device and method for secondary dental caries diagnosis

摘要

A secondary caries detection device includes a current generating device configured to generate a current having the form of a sinusoidally varying signal with a frequency chosen from the range of frequencies from 200 Hz to 100 kHz and a chosen amplitude from the range of 50 mV to 5 V. The secondary caries detection device also includes a plurality of preamplifiers of high sensitivity and linearity with phase-sensitive measuring components sensitive to the chosen frequency and integral multiples of the chosen frequency. The secondary caries detection device further includes a microprocessor control unit connected to the current generating device and the plurality of preamplifiers. In addition, the secondary caries detection device includes at least one fixed electrode configured for placement on a mucous membrane of an oral cavity and at least one moveable electrode configured for placement on a surface of a tooth, both of which are connected to the current generating device and the plurality of preamplifiers.

主权项

1. A secondary caries detection device comprising:
a current generating device configured to generate a current having the form of a sinusoidally varying signal and having a chosen frequency from the range of frequencies from 200 Hz to 100 kHz and a chosen amplitude from the range of 50 mV to 5 V; a plurality of preamplifiers having phase sensitive measuring components sensitive to the chosen frequency and to integral multiples of the chosen frequency; a microprocessor control unit connected to the current generating device and the preamplifiers; at least one fixed electrode configured for placement on a mucous membrane of an oral cavity and connected to the current generating device and to the preamplifiers; and at least one movable electrode configured for placement on a surface of a tooth and connected to the current generating device and to the preamplifiers; wherein simultaneous with an application of the current having the chosen frequency from the current generating device to the electrodes, the microprocessor control unit is configured to measure an amplitude and phase of an electrical response at the electrodes at the chosen frequency and at integral multiples of the chosen frequency to provide a response spectrum.