| 摘要 |
1. A rotary paste-carrier for dental treatment comprising a first spiral-shaped portion (7) having a cylindrical, conical or cylindro-conical, tapered envelope, characterized by the fact that it comprises a second portion (7b) which extends from said first portion and is constituted by an absolutely rectilinear, longitudinally smooth, flexible and fine end portion of the paste-carrier, the free end (7c) of said end portion being bevelled so as to form a fine boring tool. |
