| 摘要 |
A screwdriver for intra-oral implantation features a screwdriver shaft (2), which, at one of its ends, is connected with a hand piece (1) and at its other end, via an angular gear drive (3), with a rotatable tool chuck (4). The screwdriver shaft (2) consists of shaft segments (6) that can, at least partially, be moved in relation to each other and that can be tightened by means of a common longitudinal tightening device for the purpose of fixing them in their relative positions. A drive shaft consists, in the area of the shaft segments (6) of individual shaft pieces that, in the connecting area of two shaft segments (6), are connected via an angular gear for the purpose of torque transmission.
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