US 12,082,848 B2
Bone anchors with cord retention features
Rick Detlefsen, Warsaw, IN (US); Matthew Prygoski, North Liberty, IN (US); David W. Daniels, Winona Lake, IN (US); and Evangelos Tozakoglou, Fort Wayne, IN (US)
Assigned to OrthoPediatrics Corp., Warsaw, IN (US)
Filed by OrthoPediatric Corp., Warsaw, IN (US)
Filed on Feb. 27, 2020, as Appl. No. 16/803,198.
Claims priority of provisional application 62/882,238, filed on Aug. 2, 2019.
Claims priority of provisional application 62/811,318, filed on Feb. 27, 2019.
Prior Publication US 2020/0390472 A1, Dec. 17, 2020
Int. Cl. A61B 17/68 (2006.01); A61B 17/86 (2006.01)
CPC A61B 17/685 (2013.01) [A61B 17/8605 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A bone anchor for a flexible connector, comprising:
a head including a top including a threaded receptacle, an internal pocket, and a laterally extending pathway open to the top and adapted and configured for passage therethrough of a flexible connector;
a member including a pedestal received within the pocket of said head and a pair of arms extending within the pathway of said head, said arms having an open corridor therebetween for passage of a flexible connector, at least one of said arms including a first abutting surface;
a set screw having threads adapted and configured to threadably couple to the threaded receptacle of said head, said set screw having a bottom and a second abutting surface; and
a base including an aperture and plurality of bone penetrating projections, and a bone fastener having a driving portion, a threaded portion adapted and configured to fasten to the bone, and an intermediate portion between the driving and threaded portion and receivable within the aperture, the intermediate portion adapted and configured to compress the base against a bone,
wherein tightening of said set screw to said head brings the first and second abutting surfaces into contact, and the bottom of said set screw and said arms establish a fixed cross sectional area to the corridor, and
wherein the intermediate portion of said bone fastener has a spherical outer surface and the aperture has an inner conical surface, the conical surface including a portion narrower than the spherical outer surface.