MAILLEFER INSTRUMENTS HOLDING SARL Patent applications |
Patent application number | Title | Published |
20130337401 | METHOD AND DEVICE FOR DETERMINING THE APICAL POSITION IN A DENTAL ROOT CANAL - 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 including 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 elements able to produce alternating electrical signals at a number of frequencies, and elements for measuring electrical magnitude of alternating signals in the circuit. Provision is made for exciting the circuit and measuring the levels of magnitude of the alternating signals, respectively at low frequency and at high frequency and for detecting a point of intersection where the two levels measured at low and high frequencies meet and become substantially equal, these frequencies being sufficiently far apart for this point of intersection to exist. This point gives the position of the apex. | 12-19-2013 |
20130244200 | INSTRUMENT FOR DRILLING DENTAL ROOT CANALS - An instrument for drilling dental root canals, includes a tapered rod having on at least an active part of its length, at least one helical flute defining at least one helical cutting edge. The instrument also has a helical hollow on a portion of the active part extending as far as the point of the rod. At least one of the edges defined by the helical hollow is coincident with the cutting edge, the hollow reducing the cutting angle of the cutting edge. Any cross-section of the active part has at least one convex side belonging to the helical flute. The closer the cross-section in question is to the point of the rod, the more the curvature at any point of the convex side increases and tends to approximate the curvature of the circumscribed circle of the cross-section and passing via the cutting edge defined by the helical flute. | 09-19-2013 |
20130171580 | 3D DIGITAL ENDODONTICS - A method and system are described for 3D digital endodontics characterized in that 3D imaging equipment such as a CT or MRI scanner, ultrasound or the like are used to digitize the infected tooth or teeth, a 3D representation of the root canal system is extracted from the image data and visualized on a computer screen, a surgical template is designed to guide the endodontic instruments to localize the root canal(s) intra-operatively and said guide is manufactured by means of a computer driven system (e.g. milling, rapid prototyping, etc.). | 07-04-2013 |
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 |