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    • 10. 发明授权
    • Chisels and procedure for insertion of spinal implant in a spinal disc space
    • 将脊柱植入物插入椎间盘空间的凿子和程序
    • US07988693B2
    • 2011-08-02
    • US10520794
    • 2003-07-11
    • Erik O. MartzDavid Chow
    • Erik O. MartzDavid Chow
    • A61B17/00
    • A61F2/4684A61B17/1604A61B17/1671A61F2/28A61F2/4455A61F2002/30131A61F2002/448A61F2230/0013A61F2310/00359
    • A chisel with U.V-shaped, saw tooth or other shaped opposing blades is used to form channels in adjacent vertebrae. The chisel has a projection extending from at least one of the top and bottom surfaces to limit depth of penetration into the vertebrae. A guide member may be attached to the forward tip of the chisel to guide the chisel into the disc space to uniformly chisel both adjacent vertebrae simultaneously to form a channel in the vertebrae. The so formed channels serve as sa guide for a second chisel having no guide member. The second chisel, which may be a box chisel, is used to complete the channels to the desired depth to receive an associated implant, typically of cortical bone. Other embodiments are disclosed in which a two step box chisel has a retractable guide member for initially guiding the chisel as it forms partial channels in the vertebrae disc space. The guide member is then retracted and the channels formed to the desired depth. The chisels include guide member pins which serve to both limit the extension and retraction of the guide member and also to serve to limit the depth of penetration of the chisel, physically and visually. The guide member may be retracted with a rotatable knob and a threaded engaged rod or with an axially displaceable pin and rod assembly attached to the guide member. A procedure for using the chisels is also disclosed.
    • 使用具有U.V形锯齿或其他形状相对的刀片的凿子在相邻椎骨中形成通道。 凿子具有从顶表面和底表面中的至少一个延伸的突起,以限制穿入椎骨的深度。 引导构件可以附接到凿子的前端,以将凿子引导到椎间盘空间中,以均匀地同时凿孔两个相邻的椎骨以在椎骨中形成通道。 这样形成的通道用作没有引导构件的第二凿子的引导件。 可以使用第二凿子,其可以是盒式凿子,以将通道完成到期望的深度以接收通常为皮层骨的相关植入物。 公开了其他实施例,其中两台凿子具有可缩回的引导构件,用于在椎骨盘空间中形成部分通道时最初引导凿子。 然后引导构件缩回并且通道形成到期望的深度。 凿子包括引导构件销,其用于限制引导构件的延伸和缩回,并且还用于在物理和视觉上限制凿子的穿透深度。 引导构件可以用可旋转的旋钮和螺纹接合的杆或与安装在引导构件上的可轴向移位的销和杆组件缩回。 还公开了使用凿子的方法。