Inspection method for endodontic files, and equipment for same

摘要

An inspection equipment is provided by which the endodontic file is examined and judged as to if it reaches to its critical strength. When an appropriately selected endodontic file out of the endodontic files 11, 12, 13 in the kit case 1 is set at the file sample holding portion 5 in the kit case 1 and data corresponding to the endodontic file is input from the data input portion 22, the electric resistance value on the file portion of the endodontic file measured by the resistance measuring portion 20 and the resistance value on the critical strength with correspondence to the data on the file read-out from the RAM 23 are brought together and compared by the inspection unit 30. If the calculating judgement portion 25 makes a judgement to the file to reach its critical level of strength in the cumulative damage, the alarm 19 issues an alarm sound, so that an endodontist or dental assistant knows that the file is not usable any more and should be discarded. As a result, the partially damaged file has no risk to be broken inside the occluded root canal and nickel-associated risk can be eliminated because the partially damaged file can be removed from the continuous service condition according to the present invention. Hence, a safe and reliable endodontic therapy can be practiced.