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    • 53. 发明授权
    • Bone fixation assembly
    • 骨固定组装
    • US06890334B2
    • 2005-05-10
    • US10457355
    • 2003-06-10
    • Michael BraceHansjuerg Emch
    • Michael BraceHansjuerg Emch
    • A61B17/58A61B17/70A61B17/80
    • A61B17/8047A61B17/7059A61B17/8038A61B17/8685
    • The present invention relates to a bone fixation assembly for securing a fixation device, such as a bone plate, to bone. The assembly includes the fixation device, a bushing, a fastening screw, and a locking screw. The bushing is seated within a through hole in the fixation device and can rotate within the through hole and has a sidewall with a bore. The sidewall has at least one slot for allowing outward expansion of the sidewall against the through hole to thereby lock the bushing at a selected angle relative to the axis of the through hole. The fastening screw has a threaded shaft for insertion through the bore of the bushing and threads into bone to secure the bushing and fixation device to bone. The head of the fastening screw fits in the bushing and includes a radial wall and open end defining a recess. The radial side wall has at least one slit for allowing outward expansion of the radial wall thereby outwardly expanding the sidewall of the bushing. The locking screw has a body that threads in the head of the fastening screw to thereby outwardly expand the radial wall of the fastening screw.
    • 骨固定组件技术领域本发明涉及一种将固定装置(例如骨板)固定在骨上的骨固定组件。 组件包括固定装置,衬套,紧固螺钉和锁定螺钉。 衬套位于固定装置的通孔内,并且可以在通孔内旋转并具有带孔的侧壁。 侧壁具有至少一个槽,用于允许侧壁相对于通孔向外膨胀,从而相对于通孔的轴线将衬套锁定在选定的角度。 紧固螺钉具有螺纹轴,用于插入穿过衬套的孔和螺纹进入骨中以将衬套和固定装置固定到骨上。 紧固螺钉的头部装配在衬套中,并且包括限定凹部的径向壁和开口端。 径向侧壁具有至少一个狭缝,用于允许径向壁的向外膨胀,从而向外扩张衬套的侧壁。 锁定螺钉具有在紧固螺钉的头部中螺纹的主体,从而向外扩张紧固螺钉的径向壁。