Anchoring device for anchoring a rod in bones or vertebrae
DC CAFCFirst Claim
1. An anchoring assembly for anchoring a rod to a bone or a vertebra, the anchoring assembly comprising:
- a bone anchoring device comprising;
a shaft; and
a head connected to said shaft and having a recess with a base having a contact surface, the head further comprising two substantially vertically extending legs spaced apart by a first distance and defining a channel;
a fixation element having a contact surface facing the contact surface of the base of the head, the fixation element secured to the legs and configured to move sufficiently into and out of the channel; and
at least a first rod and a second rod having different diameters and configured to be interchangeably received in the channel and to be clamped by the fixation element;
wherein when any one of the rods is received in the channel, the contact surface of the fixation element and the contact surface of the base contact the rod to clamp the rod in the channel;
wherein the first rod and the second rod each have diameters within a range that is smaller than the first distance and sufficiently sized so as to be spaced apart from a bottom of the contact surface of the base when clamped in the channel; and
wherein for all rods having a diameter within the range, the rod contacts the contact surface of the base only along two contact lines.
3 Assignments
Litigations
0 Petitions
Accused Products
Abstract
An anchoring device for anchoring a rod in a bone or a vertebra and for use with at least two rods having a different diameter is provided. The anchoring device includes a shaft and a head for connection to one of said rods. The head is connected to said shaft and has a recess with a base and two substantially vertically extending legs defining a channel for receiving the rod in said channel. The anchoring device further includes a fixation element for clamping said rod in said channel. The fixation element and said base each have a contact surface contacting said rod, the contact surfaces being shaped so as to be able to clamp any of the different rods.
45 Citations
21 Claims
-
1. An anchoring assembly for anchoring a rod to a bone or a vertebra, the anchoring assembly comprising:
-
a bone anchoring device comprising; a shaft; and a head connected to said shaft and having a recess with a base having a contact surface, the head further comprising two substantially vertically extending legs spaced apart by a first distance and defining a channel; a fixation element having a contact surface facing the contact surface of the base of the head, the fixation element secured to the legs and configured to move sufficiently into and out of the channel; and at least a first rod and a second rod having different diameters and configured to be interchangeably received in the channel and to be clamped by the fixation element; wherein when any one of the rods is received in the channel, the contact surface of the fixation element and the contact surface of the base contact the rod to clamp the rod in the channel; wherein the first rod and the second rod each have diameters within a range that is smaller than the first distance and sufficiently sized so as to be spaced apart from a bottom of the contact surface of the base when clamped in the channel; and wherein for all rods having a diameter within the range, the rod contacts the contact surface of the base only along two contact lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An anchoring assembly for anchoring a rod to a bone or a vertebra, the anchoring assembly comprising:
-
a bone anchoring device comprising a shaft and a head pivotably connected to said shaft and having two substantially vertically extending legs spaced apart by a first distance and defining a channel; a pressure element having a recess including a base with a contact surface, the pressure element configured to lock the angular position of the shaft relative to the head; a fixation element having a contact surface facing the contact surface of the base of the pressure element, the fixation element secured to the legs and configured to move sufficiently into and out of the channel; and at least a first rod and a second rod having different diameters and configured to be interchangeably received in the channel when the head of the bone anchoring device and the pressure element are assembled, and to be clamped by the fixation element; wherein when any one of the rods is received in the channel, the contact surface of the fixation element and the contact surface of the base of the pressure element contact the rod to clamp the rod in the channel; wherein the first rod and the second rod each have diameters within a range that is smaller than the first distance and sufficiently sized so as to be spaced apart from a bottom of the contact surface of the base of the pressure element when claimed in the channel; and wherein for all rods having a diameter within the range and that are configured to be received in the channel when the head of the bone anchoring device and the pressure element are assembled, the rod contacts the contact surface of the base of the pressure element only along two contact lines. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A method of attaching a bone anchoring assembly to a bone or a vertebra, the anchoring assembly comprising a bone anchoring device comprising a shaft and a head connected to said shaft and having a recess with a base having a contact surface, the head further comprising two substantially vertically extending legs spaced apart by a first distance and defining a channel, a fixation element having a contact surface facing the contact surface of the base of the head, the fixation element secured to the legs and configured to move sufficiently into and out of the channel, and at least a first rod and a second rod having different diameters and configured to be interchangeably received in the channel and to be clamped by the fixation element, wherein when any one of the rods is received in the channel, the contact surface of the fixation element and the contact surface of the base contact the rod to clamp the rod in the channel, wherein the first rod and the second rod each have diameters within a range that is smaller than the first distance and sufficiently sized so as to be spaced apart from a bottom of the contact surface of the base when clamped in the channel, and wherein for all rods having a diameter within the range the rod contacts the contact surface of the base only along two contact lines, the method comprising:
-
attaching the bone anchoring device to a bone or vertebra; inserting the first rod or the second rod in the channel; and clamping the inserted rod in the channel with the fixation element. - View Dependent Claims (20)
-
-
21. An anchoring assembly for anchoring a rod to a bone or a vertebra, the anchoring assembly comprising:
-
at least a first rod and a second rod having different diameters; a bone anchoring device comprising; a shaft; and a head connected to the shaft and having a recess with a base having a contact surface, the head further comprising two substantially vertically extending legs defining a channel for interchangeably receiving each one of the rods in the channel; and a fixation element having a contact surface facing the contact surface of the base of the head, the fixation element secured to the legs and configured to move sufficiently into and out of the channel to interchangeably clamp each of the rods in the channel; wherein the contact surface of the base has a substantially V-shaped cross-section and comprises a first side wall comprising a flat surface lying along a first plane extending from one of the legs towards a bottom of the base and a second side wall comprising a flat surface lying along a second plane extending from the other one of the legs towards the bottom of the base, wherein the second plane intersects the first plane; and wherein when one of the rods is received in the channel, the contact surface of the fixation element and the contact surface of the base contact the rod to clamp the rod in the channel.
-
Specification