| 主权项 |
1. An intervertebral fusion cage comprising:
a) a leading portion having first and second ends, a front surface having a tapered insertion nose and a back surface opposite the front surface, the back surface having a recess therein adapted for reception of a rod, an upper surface and a lower surface opposite the upper surface, wherein the leading portion defines a first pivot hole at the first end, the leading portion defines a second pivot hole at the second end, and each of the first and second pivot holes extend from the upper surface to the lower surface; b) first and second support members extending from the first and second ends, respectively, each support member having 1) an upper surface and a lower surface configured to bear against and grip adjacent vertebral bodies, and 2) a front end having a pivot hole that extends from the upper surface to the lower surface; c) a first pivot pin disposed in both the first pivot hole of the leading portion and the pivot hole of the front end of the first support member, thereby pivotally connecting the first support member to the leading portion; and d) a second pivot pin disposed in both the second pivot hole of the leading portion and the pivot hole of the front end of the second support member, thereby pivotally connecting the second support member to the leading portion, wherein the first and second support members are configured to pivot outwards about the respective first and second pivot pins to increase a footprint of the cage. |
