| 摘要 |
<p>There is provided an implant drill for maxillary sinus lifting, which is capable of easily and simply boring the maxillary bone, without damaging the lining membrane of the maxillary sinus, to easily operate the maxillary sinus lifting and to expand a boring part of the maxillary born for implant placement. The implant drill for maxillary sinus lifting, which includes a central shaft with a shank in a body to be mounted onto a general dental hand piece, comprises a protrusion member elastically positioned in the body so as to move forward and backward or a lifting member being free from the rotation of the body.</p> |
