DEVICE AND METHOD OF DETERMINING POSITION OF TOOTH ROOT TOP Russian patent published in 2013 - IPC A61C19/04 A61B5/53 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to means for localisation of tooth root top in endodontics. Method consists in application of device, which contains first conducting electrode, forming endodontic probe, which is introduced into root canal, second electrode, brought into electroconductive contact with mucous membrane of oral cavity, frequency generator, which generates signals of alternating current of groups of frequencies, and means for measuring amplitude of alternating current signal in circuit. Measurement of amplitude of alternating current signals at low frequency and high frequency, determination of coincidence point, in which two levels of current amplitude, measured at said frequencies, cross and are in fact equal, are carried out. Low and high frequencies differ for determination of coincidence point, corresponding to position of root top. Device also contains means for control of selection of first frequency and second frequency and measurement of first level and second level of standardised amplitude of alternating current signals and means for determination and/or signal supply at first value of the level, obtained at first low frequency, without increase of second value of level of alternating current signal, obtained at second high frequency.

EFFECT: application of invention makes it possible to increase accuracy of determination of tooth root top position.

15 cl, 35 dwg