| 摘要 |
<p>A drill device for safely and surely forming an implanting cavity by lifting up the bottom of the maxillary cavity in the case where the maxillary molars alveolar bone has only an insufficient thickness. After forming an almost cylindrical hole in the maxillary molars alveolar bone, three drills for shaping, cutting and lifting are successively employed so as to lift up the bottom of the maxillary cavity. Then a bone is transplanted under the mucosa thus lifted up. As a result, a dense bone can be regenerated and a stable effect of forming an implanting cavity can be established.</p> |
