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    • 4. 发明专利
    • Dental intraligamentary injection needle and related methods of manufacture
    • 牙齿注射针和相关制造方法
    • JP2014121642A
    • 2014-07-03
    • JP2014039595
    • 2014-02-28
    • Ultradent Products Incウルトラデント プロダクツ インコーポレイテッド
    • FISCHER DAN E
    • A61C19/08
    • A61M37/0015A61M5/3286A61M5/34A61M5/346A61M5/349A61M5/46A61M2005/341A61M2037/003Y10T29/49826
    • PROBLEM TO BE SOLVED: To make it possible to minimize pain during penetration into a tissue at the base of a tooth, and also to minimize the tendency of a needle to bend or buckle during insertion into a dense and tough ligamentary tissue.SOLUTION: There is disclosed an injection needle device 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 metal with a high degree of hardness. The distal penetrating needle portion (108) has an exposed length of about 8 mm or less, and a maximum outside diameter of about 25 gauge. At a 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 a tissue. Alternatively, the proximal needle portion (106) can have a tapered surface that permits penetration of the tapered surface into a tissue. The injection needle device is designed to minimize pain and prevent buckling of the distal needle portion (108).
    • 要解决的问题:为了使渗透到牙齿基部的组织中的疼痛最小化,并且还可以最小化在插入致密和坚韧的韧带组织期间针头弯曲或弯曲的趋势。解决方案:有 公开了一种注射针装置,用于将局部麻醉剂施用于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)和由高硬度的陶瓷或金属形成的远端针部分(108)。 远侧穿刺针部分(108)具有约8mm或更小的暴露长度,以及最大外径约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过组织的穿透的突然停止表面(110)。 或者,近端针部分(106)可以具有允许锥形表面穿透到组织中的锥形表面。 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。