| 主权项 |
1. A stand-alone interbody fixation system comprising:
a. a cage having an annular side wall with an open interior and upper and lower surfaces, the cage being configured to fit between end plates of adjacent vertebrae; b. an anterior fixation blade having an anterior alignment boss with two opposing outward extending anterior blades with end plate penetrating tips configured to fit within the open interior of the cage, the anterior alignment boss having first and second ends, the first end of the anterior alignment boss being rotatably coupled with a first opening in the annular side wall, wherein the anterior alignment boss further comprises ratchet teeth; c. a posterior fixation blade having a posterior alignment boss with two opposing outward extending posterior blades with end plate penetrating tips configured to fit within the open interior of the cage, the posterior alignment boss having first and second ends, the first end being rotatably coupled to the second end of the anterior alignment boss and the second end of the posterior alignment boss being rotatably coupled with a second opening in the annular side wall opposite the first opening, wherein the posterior alignment boss further comprises ratchet teeth; and d. a C-clip positioned between the anterior and posterior fixation blades configured to keep the anterior and posterior fixation blades in the fixation blade retention position in the cage, the C-clip further comprises at least two ratchet pawls, each adapted to engage the ratchet teeth of one of the anterior or posterior alignment bosses; e. wherein the anterior and posterior fixation blades are counter-rotating and the engagement of the ratchet pawls of the C-clip with the ratchet teeth of the anterior and posterior alignment bosses prevents the anterior and posterior fixation blades from collapsing from a full or partially deployed state to a stowed state. |
