| 摘要 |
<p>The dental drill has a head (2) mounted at a shank (1), where the head has a plate-shaped cutting element. The plate shaped cutting element has a transfer blade at distal ends and two main blades connected to the transfer blade. The head is made of plastic material, which has hardness between 60 and 250 knoops. The head is made of polyoxymethylene, polycarbonate, polyetherimide, polyethersulfone, polysulfone, polyamide imide, polyphenylsulfone or polyetheretherketone.</p> |
