| 摘要 |
PURPOSE: A root canal formation apparatus is provided to easily remove a fracture in a root canal. CONSTITUTION: A root canal formation apparatus includes a handle and a metal rod(12') connected with the handle. The metal rod includes a first part downwardly decreasing to an end part(16') and a second part except for the downwardly decreasing part. The second part includes a 2-1 part and a 2-2 part having different cross-sections. The cross section of the 2-1 part corresponding to the predetermined length in the second part is smaller than the 2-2 part corresponding to the part except for the predetermined length. |
