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    • 7. 发明申请
    • BOTTOM LOADED PEDICLE SCREW
    • 底部装载PEDICLE螺丝
    • WO2015192057A1
    • 2015-12-17
    • PCT/US2015/035629
    • 2015-06-12
    • ORTHOPEDIATRICS CORP.
    • DANIELS, David, W.
    • A61B17/70
    • A61B17/7037A61B17/7032A61B17/7035
    • A pedicle screw includes a tulip head having an upper opening disposed in a top end of the tulip head and a lower opening disposed in a bottom end of the tulip head opposite the upper opening, wherein the upper and lower openings form a single cavity extending through the tulip head from a top end to the bottom end and the cavity having an interior wall, a retention groove disposed within the interior wall, and a stop disposed between the retention groove and upper opening and extending inwardly from the interior wall; a rod seat disposed within the cavity engaging the stop on a side closest to the lower opening, the rod seat having a rod mating face, a shank mating face opposite the rod mating face, and a hole disposed through the rod mating face and shank mating face; a screw shank having a thread disposed along a length of the screw shank and a connector positioned at an upper end of the screw shank; a retainer collar having a collar body, a pass through aperture disposed through the collar body, a locking ring groove disposed within an outer surface of the collar body, an anti-rotation tab extending from the collar body, and a collar expansion split disposed within the collar body, wherein the retainer collar disposed about the connector of the screw shank; and a locking ring disposed within the retention groove and the locking ring groove, wherein the locking groove has an unloaded outer diameter (D0i) which is greater than a diameter of the lower opening.
    • 椎弓根螺钉包括郁金香头,其具有设置在郁金香头部的顶端中的上开口和设置在与上开口相对的郁金香头的底端中的下开口,其中上开口和下开口形成延伸穿过的单个腔 所述郁金香头从顶端到底端,所述空腔具有内壁,设置在所述内壁内的保持槽,以及设置在所述保持槽和上开口之间并且从所述内壁向内延伸的止动件; 设置在所述空腔内的杆座在最靠近所述下开口的一侧接合所述止动件,所述杆座具有杆配合面,与所述杆配合面相对的柄配合面,以及穿过所述杆配合面和柄配合 面对; 具有沿着所述螺杆的长度设置的螺纹的螺杆和位于所述螺杆的上端的连接器; 具有套环主体的保持器套环,穿过套环主体设置的穿过孔,设置在套环本体的外表面内的锁定环槽,从套环主体延伸的防旋转突出部, 所述套环主体,其中围绕所述螺杆的所述连接器设置的所述保持器套环; 以及设置在所述保持槽和所述锁定环槽内的锁定环,其中所述锁定槽具有大于所述下部开口的直径的无负载外径(D0i)。