US 12,082,859 B2
System of a bone anchor and an elongate instrument
Timo Biedermann, Trossingen (DE)
Assigned to BIEDERMANN TECHNOLOGIES GMBH & CO. KG, Donaueschingen (DE)
Filed by BIEDERMANN TECHNOLOGIES GMBH & CO. KG, Donaueschingen (DE)
Filed on Nov. 8, 2021, as Appl. No. 17/521,418.
Application 17/521,418 is a continuation of application No. 16/270,029, filed on Feb. 7, 2019, granted, now 11,191,583.
Claims priority of provisional application 62/628,820, filed on Feb. 9, 2018.
Claims priority of application No. 18156123 (EP), filed on Feb. 9, 2018.
Prior Publication US 2022/0133374 A1, May 5, 2022
Int. Cl. A61B 17/86 (2006.01); A61B 17/16 (2006.01); A61B 17/17 (2006.01); A61B 17/88 (2006.01); A61B 90/00 (2016.01); A61B 17/56 (2006.01)
CPC A61B 17/864 (2013.01) [A61B 17/1615 (2013.01); A61B 17/1725 (2013.01); A61B 17/8811 (2013.01); A61B 17/8875 (2013.01); A61B 17/8897 (2013.01); A61B 90/39 (2016.02); A61B 2017/564 (2013.01); A61B 2090/3966 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A bone anchor comprising:
a shank having a first end, a second end opposite the first end, and an inner wall defining an annular region at the first end that forms a closed ring, an annular region at the second end that forms another closed ring, and a channel that extends entirely through the shank from the first end to the second end along a channel axis;
wherein an internal advancement structure provided on the inner wall is configured to cooperate with an external advancement structure of an instrument that is positionable in the channel, wherein at least part of the internal advancement structure is positioned axially between the second end and the annular region at the first end; and
wherein a majority of an entire length of the inner wall that extends from the first end to the second end is formed to be free of any internal advancement structures, and wherein a first portion of the internal advancement structure that is positioned closest to the second end comprises a projection that extends as far radially into the channel as any portion of the inner wall located axially between the first portion and the first end so as to be engageable with an instrument that is inserted into the channel from the first end.