| 20110039227 | METHOD AND DEVICE FOR DETERMINING THE APICAL POSITION IN A DENTAL ROOT CANAL - The invention relates to an apex-locating method and device for determining the depth position of the apex in a dental root canal. It uses a device making it possible to form a circuit comprising a first probe electrode inserted into the root canal of a tooth, a second electrode in conductive contact with an oral mucous membrane, frequency-generating means able to produce alternating electrical signals at a number of frequencies, and means for measuring electrical magnitude of alternating signals in the circuit. | 02-17-2011 |
