| 摘要 |
The implement has a metal needle (1) which acts as the positive electrode and a metal tube (4) which acts as the negative electrode and is fitted about the metal needle such that the needle can slide back and forth. The outer surfaces both of the metal needle and of the metal tube are coated with an electrically insulating material (8,9) except for respective tip portions. …<??>To perform the method, an electrolytic cell is created in the root canal (2) containing the metal piece by inserting a first electrode into and along the canal until it makes contact with the metal piece (3) and supplying a physiologically acceptable electrolyte into the root canal into the space between and surrounding the first electrode, the metal piece and a second electrode spaced from the first. An electric potential is connected across the electrodes such that the first is the positive electrode. Electrolysis is performed with the current at a physiologically acceptable level until the metal piece is completely dissolved. |
