Bone anchor with plug member and tool for inserting the plug member into the bone anchor
AssigneeBiedermann Technologies GmbH & Co. KG
InventorsLutz Biedermann, Wilfried Matthis
Life of this patent
Estimating the term…
Abstract
A bone anchor includes a shaft having a first end and a second end, a bore extending from the first end to the second end, and a plug member which is insertable into the bore and guidable through the bore for closing the bore at the second end. The bone anchor is suitable for minimally invasive surgery in such a way a guide wire can be guided through the bone anchor and after the bone anchor has been anchored in the bone the plug member is inserted to close the open end of the bone anchor. A bone cement or a pharmaceutical substance can be introduced into the bone anchor.
Claims15
A bone anchor, comprising:
- a tubular shaft defining a bore having a first open end and a second open end opposite to the first open end along a longitudinal axis of the shaft, the shaft including a plurality of openings through a tubular wall of the shaft;
- a plug member configured to be inserted into the bore from the first open end and guidable through the bore past at least one of the openings along the longitudinal axis for closing the bore between the first open end and the second open end;
- and
- wherein when the plug member is in the bore, a first cross section of the plug member transverse to the longitudinal axis is different from a second cross section of the plug member transverse to the longitudinal axis.
(canceled)
11-15. (canceled)
A bone anchor, comprising:
- a tubular shaft defining a bore having a first open end and a second open end opposite to the first open end along a longitudinal axis of the shaft, the shaft including a plurality of openings through a tubular wall of the shaft;
- a plug member configured to be inserted into the bore from the first open end and guidable through the bore past at least one of the openings along the longitudinal axis for closing the bore between the first open end and the second open end;
- wherein the plug member comprises an engagement structure for engagement with a tool;
- and
- wherein the engagement structure comprises at least one of a projection or a recess.
(canceled)
A bone anchor, comprising:
- a tubular shaft defining a bore extending from a first open end to a second open end opposite to the first open end along a longitudinal axis of the shaft, the first open end having a greater inner diameter than an inner diameter of the second open end, the shaft including a plurality of openings through a tubular wall of the shaft;
- a plug member having a first portion and a second portion;
- wherein the plug member is moveable from a first position inside the bore at the first open end to a second position past at least one of the openings along the longitudinal axis wherein the plug member closes the bore;
- and
- wherein the outer diameter of the first portion of the plug member is greater than the inner diameter of the second open end to prevent the first portion of the plug member from entering the second open end of the bore in the second position of the plug member.
Dependencies are inferred from the claim text.