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    • 7. 发明申请
    • LIMITED VARIABLE DIAMETER BONE SCREW
    • 有限的可变直径骨螺钉
    • WO2018051228A1
    • 2018-03-22
    • PCT/IB2017/055494
    • 2017-09-12
    • EXPANDING ORTHOPEDICS INC.
    • LEVY, MarkISHAY, EranLEVY, OhnHLEIHIL, Jaffar
    • A61B17/84A61B17/86
    • A61B17/844A61B17/7035A61B17/8685
    • A bone fastener (10) includes a shank (12) that has a proximal spherical head (14) and is formed with a longitudinal bore (20). The shank (12) includes three threaded portions, a distal portion (22), a middle portion (24) and a proximal portion (26). The middle portion (24) and proximal portion (26) each include two or more expandable struts (28). The longitudinal bore (20) in the proximal portion (26) is larger in diameter than in the distal portion (22) and the longitudinal bore (20) in the spherical head (14) is larger in diameter than in the proximal portion (26) and terminates distally in the spherical head (14) as a shoulder (32). A wedge element (34) is movably disposed in the longitudinal bore (20). The wedge element (34) includes a distal shank (36) and a proximal head (38), the proximal head (38) being arranged to abut against the shoulder (32).
    • 骨紧固件(10)包括具有近侧球形头部(14)并且形成有纵向孔(20)的柄(12)。 柄(12)包括三个螺纹部分,远端部分(22),中间部分(24)和近端部分(26)。 中间部分(24)和近端部分(26)各自包括两个或更多个可膨胀支柱(28)。 近端部分(26)中的纵向孔(20)的直径大于远端部分(22)中的纵向孔(20),并且球形头部(14)中的纵向孔(20)的直径大于近端部分 )并且作为肩部(32)在球形头部(14)中向远端终止。 楔形元件(34)可移动地设置在纵向孔(20)中。 楔形元件(34)包括远侧杆(36)和近侧头部(38),近侧头部(38)布置成抵靠肩部(32)。