US 11,737,790 B2
Pivotal bone anchor assembly with preloaded articulating retainer and bottom loaded shank
Roger P. Jackson, Prairie Village, KS (US)
Filed by Roger P. Jackson, Prairie Village, KS (US)
Filed on Aug. 1, 2022, as Appl. No. 17/878,780.
Application 17/878,780 is a continuation of application No. 17/328,737, filed on May 24, 2021, granted, now 11,419,638.
Application 17/328,737 is a continuation of application No. 16/904,816, filed on Jun. 18, 2020, granted, now 11,013,537, issued on May 25, 2021.
Application 16/904,816 is a continuation of application No. 16/057,563, filed on Aug. 7, 2018, granted, now 10,695,101, issued on Jun. 30, 2020.
Application 16/057,563 is a continuation in part of application No. 15/419,740, filed on Jan. 30, 2017, granted, now 10,039,571, issued on Aug. 7, 2018.
Application 15/419,740 is a continuation of application No. 14/557,945, filed on Dec. 2, 2014, granted, now 9,662,143, issued on May 30, 2017.
Application 14/557,945 is a continuation of application No. 13/815,054, filed on Jan. 28, 2013, granted, now 8,900,272, issued on Dec. 2, 2014.
Application 13/815,054 is a continuation of application No. 12/804,580, filed on Jul. 23, 2010, granted, now 8,394,133, issued on Mar. 12, 2013.
Application 12/804,580 is a continuation 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. 11/178,854, filed on Jul. 11, 2005, granted, now 7,789,896, issued on Sep. 7, 2010.
Claims priority of provisional application 60/832,644, filed on Jul. 21, 2006.
Claims priority of provisional application 60/736,112, filed on Nov. 10, 2005.
Claims priority of provisional application 60/728,912, filed on Oct. 21, 2005.
Claims priority of provisional application 60/725,445, filed on Oct. 11, 2005.
Claims priority of provisional application 60/722,300, filed on Sep. 30, 2005.
Claims priority of provisional application 60/655,239, filed on Feb. 22, 2005.
Prior Publication US 2022/0361925 A1, Nov. 17, 2022
Int. Cl. A61B 17/70 (2006.01); A61B 17/86 (2006.01); A61B 90/00 (2016.01)
CPC A61B 17/7035 (2013.01) [A61B 17/7028 (2013.01); A61B 17/7032 (2013.01); A61B 17/7037 (2013.01); A61B 17/864 (2013.01); A61B 17/8625 (2013.01); A61B 17/8685 (2013.01); A61B 2090/037 (2016.02)] 24 Claims
OG exemplary drawing
 
1. A pivotal bone anchor assembly configured for implantation into a bone of a patient with a drive tool and for securing a fixation rod to the bone with a fastener configured to apply a downwardly-directed force to lock the assembly, the pivotal bone anchor assembly comprising:
a receiver comprising a base defining a central bore centered about a vertical centerline axis and an upper portion defining a through channel configured to receive the fixation rod, the central bore communicating with a bottom of the receiver through a lower opening and extending upward through the channel to a top of the receiver and including a partially spherical engagement surface adjacent the lower opening and a guide and advancement structure adjacent the top of the receiver configured to mate with the fastener;
a shank comprising a longitudinal axis, an anchor portion at a distal end configured for fixation to the bone, and a capture portion at a proximal end including an upwardly-opening internal drive socket configured to mate with the drive tool and an integral partially spherical lower surface curving upwardly and outwardly from a neck portion that extends between the capture portion and the anchor portion, the capture portion being uploadable into the central bore of the receiver through the lower opening;
a retainer comprising a compressible, open ring-shaped body having at least one slit or missing section, a center opening, and an outer partially spherical surface configured for pivotal engagement with the partially spherical engagement surface of the receiver, the retainer being configured for positioning into the central bore prior to the capture portion of the shank and for capturing the capture portion upon its uploading through the lower opening so as to pivotally hold the capture portion of the shank in the receiver; and
an insert positionable within the central bore of the receiver comprising a center aperture configured to provide access to the internal drive socket for the drive tool, an upper recessed surface configured to engage the fixation rod, and a lower surface configured to transfer the downwardly-directed force toward the capture portion of the shank to lock the assembly.