A bone anchor system, comprising: an expandable anchor body (410, 852, 952); an expander (180, 480, 700, 750, 800, 900) comprising: at least one expansion portion; and a first opening and a second opening in a distal end of the expander (180, 480, 700, 750, 800, 900); wherein the expander (180, 480, 700, 750, 800, 900) is displaceable between a first position relative to the anchor body (410, 852, 952) and a second position relative to the anchor body (410, 852, 952), wherein the expansion portion is configured to expand the anchor body (410, 852, 952) when the expander (180, 480, 700, 750, 800, 900) is in the second position; a retractable suture grabber extending through the first opening and comprising a wire loop; and a suture which extends through the second opening, wherein the anchor body (410, 852, 952) comprises a plurality of first tines (418, 860, 960) extending from a position proximal to a second end (414, 856, 956) of the anchor body (410, 852, 952) to a first end (412, 854, 954) of the anchor body (410, 852, 952), each of the first tines (418, 860, 960) being internally defined by an axial bore (416, 858, 958) of the anchor body (410, 852, 952) and radially defined by a plurality of first expansion slots (420, 862, 962), characterized in that the anchor body (410, 852, 952) further comprises a plurality of second tines (422, 864, 964) extending from a position proximal to the first end (412, 854, 954) of the anchor body (410, 852, 952) toward the second end (414, 856, 956) of the anchor body (410, 852, 952), each of the second tines (422, 864, 964) being internally defined by the axial bore (416, 858, 958) and radially defined by a plurality of second expansion slots (424, 966). an expandable anchor body (410, 852, 952); an expander (180, 480, 700, 750, 800, 900) comprising: at least one expansion portion; and a first opening and a second opening in a distal end of the expander (180, 480, 700, 750, 800, 900); at least one expansion portion; and a first opening and a second opening in a distal end of the expander (180, 480, 700, 750, 800, 900); wherein the expander (180, 480, 700, 750, 800, 900) is displaceable between a first position relative to the anchor body (410, 852, 952) and a second position relative to the anchor body (410, 852, 952), wherein the expansion portion is configured to expand the anchor body (410, 852, 952) when the expander (180, 480, 700, 750, 800, 900) is in the second position; a retractable suture grabber extending through the first opening and comprising a wire loop; and a suture which extends through the second opening, wherein the anchor body (410, 852, 952) comprises a plurality of first tines (418, 860, 960) extending from a position proximal to a second end (414, 856, 956) of the anchor body (410, 852, 952) to a first end (412, 854, 954) of the anchor body (410, 852, 952), each of the first tines (418, 860, 960) being internally defined by an axial bore (416, 858, 958) of the anchor body (410, 852, 952) and radially defined by a plurality of first expansion slots (420, 862, 962), characterized in that the anchor body (410, 852, 952) further comprises a plurality of second tines (422, 864, 964) extending from a position proximal to the first end (412, 854, 954) of the anchor body (410, 852, 952) toward the second end (414, 856, 956) of the anchor body (410, 852, 952), each of the second tines (422, 864, 964) being internally defined by the axial bore (416, 858, 958) and radially defined by a plurality of second expansion slots (424, 966).