US 9,808,292 B2
Cannulated polyaxial screw
Roger P. Jackson, Prairie Village, KS (US)
Filed by Roger P. Jackson, Prairie Village, KS (US)
Filed on Sep. 28, 2015, as Appl. No. 14/868,213.
Application 14/868,213 is a continuation in part of application No. 13/068,505, filed on May 12, 2011, granted, now 9,144,444.
Application 13/068,505 is a continuation of application No. 12/290,244, filed on Oct. 29, 2008, granted, now 7,967,850, issued on Jun. 28, 2011.
Application 12/290,244 is a continuation in part of application No. 11/522,503, filed on Sep. 14, 2006, granted, now 7,766,915, issued on Aug. 3, 2010.
Application 11/522,503 is a continuation in part of application No. 11/140,343, filed on May 27, 2005, granted, now 7,776,067, issued on Aug. 17, 2010.
Application 11/140,343 is a continuation in part of application No. 11/024,543, filed on Dec. 20, 2004, granted, now 7,204,838, issued on Apr. 17, 2007.
Application 11/024,543 is a continuation in part of application No. 10/986,377, filed on Nov. 10, 2004, granted, now 7,833,250, issued on Nov. 16, 2010.
Application 10/986,377 is a continuation in part of application No. 10/818,555, filed on Apr. 5, 2004, granted, now 8,052,724, issued on Nov. 8, 2011.
Application 10/818,555 is a continuation of application No. 10/464,633, filed on Jun. 18, 2003, granted, now 6,716,214, issued on Apr. 6, 2004.
Claims priority of provisional application 61/000,964, filed on Oct. 30, 2007.
Prior Publication US 2016/0183984 A1, Jun. 30, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/70 (2006.01); A61B 17/86 (2006.01)
CPC A61B 17/7037 (2013.01) [A61B 17/7032 (2013.01)] 36 Claims
OG exemplary drawing
 
1. A cannulated polyaxial bone anchor assembly implantable in a bone and for mechanically coupling a stabilization member to the bone, the cannulated polyaxial bone anchor assembly comprising:
an anchor member comprising a first proximal end portion, a first distal end portion, and a central opening extending entirely through the anchor member along a first central longitudinal axis of the anchor member and opening onto a top end of the first proximal end portion and a bottom end of the first distal end portion, the central opening being closed laterally along an entire length thereof and having a constant diameter along the first distal end portion through to the bottom end opening, the top end of the first proximal end portion comprising a radiused upper surface, the first distal end portion comprising an implant portion to be implanted into the bone; and
a head member comprising:
a second proximal end portion and a second distal end portion, the head member defining a second central longitudinal axis extending through the second proximal end portion and the second distal end portion;
a channel extending through the head member perpendicularly to, and intersecting, the second central longitudinal axis, the channel extending proximally through the second proximal end portion, the channel configured to receive the stabilization member and a closure so that the stabilization member can be mechanically coupled to the bone;
a distal opening at the second distal end portion centered about the second central longitudinal axis; and
a chamber in communication with the channel and the distal opening, the chamber pivotally receiving the first proximal end portion therein as the first distal end extends through the head member distal opening so that the first central longitudinal axis is orientable coaxially with the second central longitudinal axis and at any of a plurality of angles relative to the second central longitudinal axis,
wherein when the anchor member and head member are coupled together, the cannulated polyaxial bone anchor assembly is insertable over a guide wire as a fully assembled unit and implantable into the bone with only the stabilization member and the closure remaining to be inserted into the head member channel.