公开(公告)号：US5681311A

公开(公告)日：1997-10-28

申请号：US575601

申请日：1995-12-20

申请人： Kevin T. Foley ,  Peter M. Klara ,  Keith Maxwell ,  Lance Middleton ,  Matthew M. Morrison

发明人： Kevin T. Foley ,  Peter M. Klara ,  Keith Maxwell ,  Lance Middleton ,  Matthew M. Morrison

IPC分类号： A61B17/58 ,  A61B17/70 ,  A61B17/80 ,  A61B17/88

CPC分类号： A61B17/8038 ,  A61B17/7059 ,  A61B17/8033

摘要： A bone fixation apparatus having an elongated plate member with at least two pairs of circular openings and a series of openings positioned along the longitudinal plane of the plate member with the circular openings and the series of openings each having a central vertical axis. The circular openings and series of openings each form a cavity with walls extending between the upper and lower plate member surfaces with at least a plurality of the cavities having smaller diameter portions at the plate member upper and lower surfaces and a larger diameter portion therebetween. The cavities are configured in the shape of two inverted cones with matching base circles for allowing transverse and longitudinal angulation of an implanted bone screw. A plurality of bone screws each have a threaded first end portion adapted for implantation into a patient's bone mass and a generally ellipsoid shaped enlarged second end portion. A locking member connects to the second end portion of each bone screw for expanding the second end portion so as to grip the cavity wall of the plate member and for locking each bone screw into a selected position within the circular openings and series of openings of the plate member.

摘要翻译： 一种骨固定装置，具有具有至少两对圆形开口的细长板构件和沿着板构件的纵向平面定位的一系列开口，其中圆形开口和一系列开口各自具有中心垂直轴线。 圆形开口和一系列开口各自形成具有在上板和下板构件表面之间延伸的壁的空腔，其中至少多个空腔在板构件上表面和下表面处具有较小的直径部分，并且其间具有较大的直径部分。 空腔被构造成具有匹配基圆的两个倒锥体的形状，用于允许植入骨螺钉的横向和纵向成角度。 多个骨螺钉各自具有适于植入患者骨块的螺纹第一端部部分和大致椭圆形的扩大的第二端部部分。 锁定构件连接到每个骨螺钉的第二端部，用于扩展第二端部部分，以便夹持板构件的空腔壁，并且用于将每个骨螺钉锁定在所述圆形开口和一系列开口内的选定位置 板材。