| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dental instrument which is not fractured by a large torque. <P>SOLUTION: In the mechanized dental instrument which includes one active part 2 and a handle 3 arranged at an end opposite to the active part, the handle 3 of the dental instrument is equipped, in the attaching location of a head of a handpiece, with a rotation drive means 4 which can directly engage with a rotation drive means located in the upper part of the head of the handpiece, the drive means 4 is manufactured from metal plate parts integrated by especially inserting into the upper part of the stem 2a of the active part 2, the parts have at least one opening 5, and the opening is formed so that a plastic material, which forms the handle 3, can circulate in a stage of overmolding on the stem 2a and that the rotation drive means may be certainly connected with the upper part of the stem 2a. <P>COPYRIGHT: (C)2010,JPO&INPIT |
