#$%^&*AU2019216718A120190905.pdf#####Abstract An expandable bone anchor, comprising: an anchor body comprising: a distal tapered anchor tip； a plurality of first expandable side portions positioned at a proximal end of the anchor body, wherein the first expandable side portions expand by bending outward such that the first expandable side portion extends outward to a greater extent at its proximal portion than at its distal portion； and a plurality of second expandable side portions positioned distally of the first expandable side portions, wherein the second expandable side portions expand by bending outward such that the second expandable side portion extends outward to a greater extent at its distal portion than at its proximal portion； and a spreader configured to advance distally into the anchor body, thereby causing the first and second expandable side portions to expand outward.6I30 4 4 4 N$ 'N N I N~N tNN 4 LL N 'N N N N N 4 'N <；N I N 4 N j N 4 4
