CPC A61F 2/442 (2013.01) [A61F 2/447 (2013.01); A61F 2/4611 (2013.01); A61F 2002/30593 (2013.01); A61F 2002/30904 (2013.01)] | 20 Claims |
1. An expandable interbody spacer having a longitudinal axis, a proximal end and a distal end, comprising:
a housing having two sides interconnected by a distal endwall and a proximal endwall defining a hollow interior; the distal endwall having a threaded distal opening and the proximal endwall having a threaded proximal opening;
an upper endplate and a lower endplate each having a posterior end and an anterior end, a bone-engaging surface and an interior surface opposite to the bone-engaging surface; the interior surface of each of the upper and lower endplates having an anterior ramp surface extending at an angle with respect to the interior surface and a posterior ramp surface extending at an angle with respect to the interior surface;
an anterior actuator located between the interior surfaces of the upper endplate and the lower endplate near the distal end of the spacer;
a posterior actuator located between the interior surfaces of the upper endplate and the lower endplate near the proximal end of the spacer;
an anterior drive screw comprising a shank having a threaded outer surface; the shank being threadingly connected to the threaded distal opening; the anterior drive screw having an anterior drive bore extending from a proximal opening along a longitudinal drive axis; and
a posterior drive screw comprising a shank having a threaded outer surface; the shank being threadingly connected to the threaded proximal opening; the posterior drive screw having a posterior drive bore extending along the longitudinal drive axis between a proximal opening and a distal opening.
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