| 摘要 |
FIELD: medical engineering. ^ SUBSTANCE: device has cylindrical metal conductor having copper core coated with silver or tin or zinc layer. Dielectric layer covers metal layer to active working part. Total electrode diameter is not greater than root canal diameter in good conductance segment. Active working part length of the electrode is determined by hardly passable canal segment length. ^ EFFECT: enhanced effectiveness in treating teeth having impassable root canals. ^ 2 dwg |
