US 9,808,296 B2
Hammertoe implant and instrument
Daniel F. McCormick, Memphis, TN (US)
Assigned to Wright Medical Technology, Inc., Memphis, TN (US)
Appl. No. 14/403,746
Filed by Wright Medical Technology, Inc., Memphis, TN (US)
PCT Filed Sep. 18, 2014, PCT No. PCT/US2014/056315
§ 371(c)(1), (2) Date Nov. 25, 2014,
PCT Pub. No. WO2016/043751, PCT Pub. Date Mar. 24, 2016.
Prior Publication US 2016/0081728 A1, Mar. 24, 2016
Int. Cl. A61B 17/72 (2006.01); A61B 17/16 (2006.01); A61F 2/42 (2006.01); A61B 17/88 (2006.01)
CPC A61B 17/7291 (2013.01) [A61B 17/1604 (2013.01); A61B 17/1617 (2013.01); A61B 17/7266 (2013.01); A61B 17/8872 (2013.01); A61F 2/4225 (2013.01); A61B 17/1682 (2013.01); A61B 17/1686 (2013.01); A61B 17/7283 (2013.01); A61F 2002/423 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A bone implant system, comprising:
a bone implant having:
a first end configured to couple to a first bone;
a second end;
a first expandable section comprising at least one expandable feature, wherein the first expandable section is sized and configured to be received within a reverse countersink formed in a second bone in a collapsed state, wherein the first expandable section is configured to expand within the reverse countersink such that the at least one expandable feature couples to a bearing surface of the reverse countersink, wherein the at least one expandable feature comprises a plurality of expandable arms each having a connection end and a free end, the connection end coupled to a distal portion of the second end and the free end being proximally disposed relative to the connection end to couple to the bearing surface of the reverse countersink, wherein the free ends of the plurality of expandable arms define a first diameter when in a collapsed state and a second diameter when fully expanded, and further wherein the countersink defines a countersink diameter, the second diameter being equal to or greater than the countersink diameter; and
an elongate shaft extending longitudinally between the first end and the second end, wherein a proximal portion of the second end is coupled to the elongate shaft; and
a driver comprising a longitudinal sleeve having a channel configured to receive the expandable section of the second end for controlling rotation of the bone implant.