| 摘要 |
PURPOSE: A drill for forming a bony window is provided, which makes interleaving depth of the drill part controlled by the second cap. CONSTITUTION: A drill for forming a bony window comprises a driver(20) in which a drill part for drilling the alveolar bone is formed; a first cap(40) which is connected to the drill driver and is comprised in order to limit the interleaving depth of the drill part; and a second cap(50) which is connected to the drill driver and is comprised to adjust the location of the first cap. In the outer side surface of the driver, lots of guide units are equipped. A guide groove(43) in which the guide unit is inserted is formed in the inner side of the first cap. In the second cap, plural guide projections(53) are equipped.
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