US 2019/0290331 A1 · MULTIPOINT FIXATION IMPLANTS AND RELATED METHODS

Abstract

Bone anchor assemblies are disclosed herein that can provide for improved fixation as compared with traditional bone anchor assemblies. An exemplary assembly can include a bracket or wing that extends down from the receiver member. The distal portion of the wing can define a bone anchor opening through which one or more auxiliary bone anchors can be disposed to augment the fixation of the assembly's primary bone anchor. A distal surface of the distal portion of the wing can be obliquely angled relative to a proximal-distal axis of the spanning portion to face one of a caudal direction or a cephalad direction. A distal surface of the distal portion of the wing can be obliquely angled relative to the proximal-distal axis of the spanning portion to face one of a medial direction or a lateral direction. Surgical methods using the bone anchor assemblies described herein are also disclosed.

Claims21

Dependent claims

A bone anchor assembly, comprising:

a bone anchor;
an auxiliary bone anchor;
a receiver member coupled to a proximal end of the bone anchor and defining a rod seat configured to receive a rod;
a closure mechanism threadably mated to the receiver member;
a wing that includes a proximal portion, a distal portion, and a spanning portion that connects the proximal and distal portions, the proximal portion having a distal-facing surface that opposes a proximal terminal end of the receiver member and defines an opening through which at least a portion of the closure mechanism is disposed, the spanning portion extending vertically along a side wall of the receiver member between the proximal portion and the distal portion, the distal portion extending outward from a distal end of the spanning portion;
and
a nut configured to threadably engage the closure mechanism to secure the proximal portion of the wing to the receiver member,
wherein the distal portion of the wing defines a bone anchor opening through which the auxiliary bone anchor is disposed and wherein a distal surface of the distal portion of the wing is obliquely angled relative to a proximal-distal axis of the spanning portion to face one of a caudal direction or a cephalad direction.

5 more elements

A method of securing a bone anchor assembly to bone, comprising:

driving a bone anchor into bone, the bone anchor having a receiver member coupled to a proximal end thereof;
positioning a rod in a rod seat defined in the receiver member;
attaching a closure mechanism to the receiver member to retain the rod in the receiver member;
coupling a proximal portion of a wing to at least one of the closure mechanism and a proximal terminal end of the receiver member, such that a spanning portion of the wing extends vertically along a side wall of the receiver member between the proximal portion and a distal portion of the wing that extends outward from a distal end of the spanning portion;
and
driving the auxiliary bone anchor through a bone anchor opening formed in the distal portion of the wing into bone at an oblique angle in one of a caudal direction or a cephalad direction,
wherein a distal surface of the distal portion of the wing is obliquely angled relative to a proximal-distal axis of the spanning portion to face the caudal direction or the cephalad direction.

4 more elements

Dependencies are inferred from the claim text.

Multipoint fixation implants and related methods

Life of this patent

Multipoint fixation implants and related methods

Life of this patent

Abstract

Claims21