摘要 |
Provided is an endodontic instrument for root canal filling including: a body having DC power source and printed circuit board; a heating tip connected to the body; a switch; and a control circuit for switching on/off power supply to the heating tip. The heating tip includes: a first metal part serving as a resistant tube; a second metal part disposed inside the first metal part and configured to supply power, check a thermoelectric power (+) terminal; a third metal part disposed inside the first metal part, and configured to supply power; a contact part; an insulator disposed inside the first metal part and enclosing surfaces of the second and third metal parts; first conductive tube; a second conductive tube; and an insulator connected and fixed to the first and second conductive tubes, whereby temperature is detected using thermoelectric power of the thermocouple. |