| 摘要 |
PROBLEM TO BE SOLVED: To lessen piercing points, to surely and speedily anesthesize a dentation, and to minimize the quantity of anesthetic to suppress drug induced suffering. SOLUTION: By piercing the tip 4 of a needle into a small hole closely by several millimeters considering the small hole opened at the bone as a path, the path between an anesthetic cartridge and a medullary cavity is secured to inject the anesthetic. A needle tip 4 is formed to be flat so as to be easy to find the hole and the length of the needle 2 is made short so as to be easy to handle and the needle is prevented from entering the inside of the medullary cavity even when it is pierced with pressure. In addition, the injection needle for dental intraosseous anesthesia has an angle formed by the base 1 and the needle 2 of the injection needle being about 75 deg. since it is easier to pierce the needle into the hole when the direction of the hole made by a drill coincides with the direction of the needle 2. |
