| 摘要 |
The present invention relates to a dental drill for quickly and safely lifting the sinus without damaging the mucous membrane therein when operating the sinus. The dental drill, according to the present invention, comprises a connection portion which is formed on the upper end of a body so as to be connected to a driving device, and a cutting portion, which is formed at the lower end of the body, having cutting blades for drilling, wherein the cutting portion comprises a plurality of cutting blades which are arranged in a circle so as to have a cylindrical shape with an empty hollow inside to allow collection of a main disk, and wherein the cutting blades are provided with an curved surface end at the end, which is rounded, so that damage to the mucous membrane can be prevented even when the outer circumferential edge of the end of the cutting portion comes into direct contact with the mucous membrane when drilling. |
