METHOD OF DETECTING THE POSITION OF A LATERAL CANAL EXTENDING FROM A ROOT CANAL TO A PERIODONTAL SPACE, AND DETECTING AN OPENING DIRECTION OF THE LATERAL CANAL, APPARATUS FOR THE SAME, AND A COMPUTER READABLE STORAGE MEDIUM STORING PROGRAM TO HAVE A COMPUTER EXECUTE THE METHOD
A method comprising: comparing each value of measured signals with a plurality of model tooth position measurement data groups, and storing the measured signal values and an indication value at the time when a fluctuation of the indication value which indicates a distance from a root apex position to a distal end of an electrode for position detection shows an apex in a convex shape, the indication value being indicated by a model tooth position measurement data group in a predetermined relationship； and comparing second-time measured signal values and an indication value with the stored first-time measured signal values and the stored indication value, respectively, if at least two of them correspond or fall within a predetermined error range, stopping the electrode and measuring a position of the distal end of the electrode.
