EP 0727969 A1 19960828 - METHOD AND DEVICE FOR LOCALIZING THE APEX OF A TOOTH
Title (en)
METHOD AND DEVICE FOR LOCALIZING THE APEX OF A TOOTH
Title (de)
VERFAHREN UND GERÄT ZAHNPULPAORTUNG
Title (fr)
PROCEDE ET DISPOSITIF DE LOCALISATION DE L'APEX D'UNE DENT
Publication
Application
Priority
- FR 9401315 W 19941109
- FR 9313802 A 19931109
Abstract (en)
[origin: WO9513032A1] Method of localizing the apex (4) of a root canal (3) of a tooth (1), using electrodes, with a measuring electrode (A) being inserted in the root canal (3) and a reference electrode (B) being placed in the mouth (5). The invention is characterized in that a second reference electrode (C) is placed in the mouth (5) and in that three impedance measurements (X, Y, Z) are effected between electrodes (A and B), (A and C) and (B and C) respectively. Based on the relation X + Y - Z = 2R, where R is the impedance of the fraction of the root canal (3) between the measuring electrode (A) and the apex (4), the impedance of the root canal (3) being a linear function of the length an evaluation, or determination, and display is effected of the distance separating, on each measurement of the set of values (X, Y, Z), said measuring electrode (A) from the apex (4), the operation then being repeated in a cyclic or non-cyclic manner.
IPC 1-7
IPC 8 full level
A61B 5/053 (2006.01); A61C 19/04 (2006.01)
CPC (source: EP)
A61B 5/0534 (2013.01); A61C 19/041 (2013.01); A61C 19/042 (2013.01)
Citation (search report)
See references of WO 9513032A1
Designated contracting state (EPC)
BE FR GB IT
DOCDB simple family (publication)
WO 9513032 A1 19950518; AU 1070095 A 19950529; EP 0727969 A1 19960828; FR 2712170 A1 19950519; FR 2712170 B1 19960216
DOCDB simple family (application)
FR 9401315 W 19941109; AU 1070095 A 19941109; EP 95901475 A 19941109; FR 9313802 A 19931109