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    • 22. 发明申请
    • DENTAL INTRALIGAMENTARY INJECTION NEEDLES AND RELATED METHODS OF MANUFACTURE
    • 牙齿注射针和相关制造方法
    • WO2009114602A2
    • 2009-09-17
    • PCT/US2009/036774
    • 2009-03-11
    • ULTRADENT PRODUCTS, INC.FISCHER, Dan, E.
    • FISCHER, Dan, E.
    • A61M5/46A61M5/32B23P11/00
    • A61M37/0015A61M5/3286A61M5/34A61M5/346A61M5/349A61M5/46A61M2005/341A61M2037/003Y10T29/49826
    • Injection needle devices are disclosed for administering a local anesthetic into tough, dense ligamentary tissue surrounding a tooth. The injection needle is a two- part needle (104) that includes a proximal needle portion (106) formed of metal, ceramic or rigid plastic and a distal needle portion (108) formed of ceramic or hardened metal. The distal penetrating needle portion (108) has an exposed length not more than about 8 mm, and a maximum outside diameter of about 25 gauge. At the transition between the proximal needle portion (106) and the distal needle portion (108) there can be an abrupt stop surface (110) for limiting penetration through tissue. Alternatively, the proximal needle portion (106) can have a tapered surface that permits penetration of the tapered surface into tissue. The injection needle device is designed to minimize pain and prevent buckling of the distal needle portion (108).
    • 公开了注射针装置,用于将局部麻醉剂施用到围绕牙齿的韧性密集的韧带组织中。 注射针是两部分针(104),其包括由金属,陶瓷或刚性塑料形成的近侧针部分(106)和由陶瓷或硬化金属形成的远端针部分(108)。 远侧穿刺针部分(108)的暴露长度不大于约8mm,最大外径约为25度。 在近端针部分(106)和远端针部分(108)之间的过渡处,可以有一个用于限制穿透组织的突然停止表面(110)。 或者,近端针部分(106)可以具有允许锥形表面穿透组织的锥形表面。 注射针装置设计成最小化疼痛并防止远端针部分(108)的屈曲。