| 摘要 |
<p>The device has a driving pin that is connected with an angular shaft (1) of a dental instrument by a flat contact during an operation of the dental instrument. The flat contact that is formed by the attachment of the angular shaft receiving device with the dental instrument lies in a hooked region, where the device is manually operated or is operated by an angular shaft motor. The driving pin has a constant or variable radius at a force transferring surface, and has a combination of variable surfaces and radius at the force transferring surface.</p> |
