| 摘要 |
PURPOSE: To provide an endontic treatment system for filling human marrow canal by making respective tapers of some raspatories in a dental raspatory set larger than the other raspatories and smaller than other raspatories in a flute part. CONSTITUTION: A handle 52 of a forming raspatory has a piercing hole 58 in the neighborhood of a basic end. Diameter A of a shank 54 is slightly smaller than the maximal diameter B of a first flute. A shifting land 66 extends between the first flute 62 and a raspatory shank 54 having a smaller diameter. A processing part 56 has multiple flutes. Diameter and sharpness of respective flutes decreases corresponding to distances from the first flute 62. Cutting blades with increasing pitch are arranged on circumferences of the flutes. A distal end has no cutting blade and diameter C thereof is slightly smaller than the diameter of the flute 60. The flute 60 is connected with the distal end by the land. Among raspatory sets 50F, 50F, 50G, 50H, tapers of 50F, 50G, 50H are made larger than 50E, 50F, 50G of the other raspatories, and the flute parts are made shorter. |
