US 9,808,298 B2
Open-architecture interference screw
John Stroncek, Boston, MA (US); Alfred R. Berube, Jr., North Attelboro, MA (US); and Kirsten H. Aarsvold, Mansfield, MA (US)
Assigned to Smith & Nephew, Inc., Memphis, TN (US)
Filed by Smith & Nephew, Inc., Memphis, TN (US)
Filed on Apr. 9, 2014, as Appl. No. 14/249,020.
Claims priority of provisional application 61/810,007, filed on Apr. 9, 2013.
Prior Publication US 2014/0303676 A1, Oct. 9, 2014
Int. Cl. A61B 17/86 (2006.01); A61B 17/88 (2006.01); A61F 2/08 (2006.01)
CPC A61B 17/864 (2013.01) [A61B 17/869 (2013.01); A61B 17/8635 (2013.01); A61B 17/8645 (2013.01); A61B 17/888 (2013.01); A61F 2/0811 (2013.01); A61F 2002/0817 (2013.01); A61F 2002/0841 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An open-architecture interference screw for creating an interference fit between a bone tunnel and tissue, the screw comprising:
a threaded body having a proximal end and a distal end, and a thread extending around the threaded body between the proximal end and distal end;
at least one supporting spline extending along a cannulation through the threaded body between the proximal end and distal end, the at least one supporting spline engagable with a delivery device;
at least one opening defined by an open surface between the thread, the at least one opening having a ratio of open surface area to closed surface area, the ratio being selected such that, when torsionally loaded, the screw does not exhibit plastic deformation when inserted into an undersized bone tunnel; and
a tapered tip extending from the distal end of the threaded body, the tapered tip having a thread extending at least partway around the tapered tip;
wherein a surface of the cannulation is tapered toward the distal end of the threaded body so as to form a positive seat with a corresponding tapered surface of the delivery device when the delivery device is engaged with the at least one supporting spline.