Spine stabilization

Patent metadata

Field	Value
Publication number	US-12544119-B2
Application number	US-202318449759-A
Country	US
Kind code	B2
Filing date	Aug 15, 2023
Priority date	Apr 13, 2011
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A bone stabilizing plate includes two plate portions, each affixable to bones of a patient, the plate portions telescoping together with mating rails and grooves. A limiter associated with one of the plate portions sliding engages one a catch associated with the other of the plate portions, when the plate portions are telescoped together, and resists stops telescoping when the plate portions are telescoped a predetermined distance apart. Once the limiter and catch are engaged, the plate portions enable imposition of a minimum compressive force between bones connected to the plates. The limiter is resiliently positioned to deflect into a relief formed in its respective plate portion. A groove positioned proximate the catch enables free telescoping motion limited by the engagement of the catch and limiter, whereby the minimum compressive force between bones is maintained, and Wolfe's Law may apply.

First claim

What is claimed is:

1 . A device for stabilizing bones of a patient, comprising:
a receiver portion defining a central longitudinal axis and a chamber extending along the central longitudinal axis, the receiver portion including:
a plurality of apertures for receiving bone fasteners for attachment to a first vertebral body of the patient, wherein the plurality of apertures are laterally offset from the central longitudinal axis;
two projecting surfaces disposed on a top surface of the receiver portion extending laterally towards the central longitudinal axis and towards each other, wherein each of the projecting surfaces is configured to flex laterally to the central longitudinal axis; and
a limiter disposed on each of the projecting surfaces and extending into the chamber; and
an insert portion a extending along the central longitudinal axis including:
a plurality of apertures for receiving bone fasteners for attachment to a second vertebral body of the patient, wherein the plurality of apertures are laterally offset from the central longitudinal axis;
a projection sized to be longitudinally received into the chamber of the receiver portion; and
two catches disposed on the projection, each catch of the two catches configured to engage one of the limiters when the chamber receives the projection, each limiter configured to admit passage of each catch when the projection is received in the chamber.

2 . The device of claim 1 , wherein each limiter is shaped to prevent each catch from backing out of the chamber once the catch passes the limiter when the projection is received in the chamber.

3 . The device of claim 1 , wherein:
the projection includes two oppositely arranged rails; the chamber includes corresponding grooves configured to receive the respective rails.

4 . The device of claim 1 , wherein the receiver portion includes an opening in communication with the chamber, the opening including a plurality of regularly spaced indicating formations indicative of the extent of compression.

5 . The device of claim 4 , wherein the opening exposes at least a portion of a distal end of the projection and a longitudinal position of the distal end of the projection relative to the plurality of indicating formations indicates the extent of compression.

6 . The device of claim 4 , wherein indicating formations include first and second sets of oppositely positioned depth indicators.

7 . The device of claim 1 , further comprising a through hole centrally positioned along the central longitudinal axis and in communication with the chamber, the through hole configured to receive a disengagement tool for resiliently bending the projecting surfaces to disengage the limiters from each catch.

8 . The device of claim 4 , further comprising a through hole centrally positioned along the central longitudinal axis and in communication with the chamber, the through hole configured to receive a disengagement tool for resiliently bending the projecting surfaces to disengage the limiters from each catch.

9 . The device of claim 1 , wherein the limiters have a ramped surface on one side and a blocking surface on the other side.

10 . The device of claim 9 , wherein each catch includes a blocking surface mateably engageable with the blocking surface of each limiter to prevent telescoping apart of the insert portion and the receiver portion.

11 . The device of claim 10 , wherein when the insert portion and the receiver portion are telescoped together, a compressive force is applied between the first and second vertebral bodies.

12 . A device for stabilizing bones of a patient, comprising:
a receiver portion defining a central longitudinal axis and a body defining a chamber extending along the central longitudinal axis, the body including:
a plurality of apertures for receiving a bone fastener for attachment to a first vertebral body of the patient, wherein the plurality of apertures are laterally offset from the central longitudinal axis;
two projecting surfaces, having a first end and second end, disposed on a top surface of the receiver portion extending laterally towards the central longitudinal axis and towards each other, wherein each of the projecting surfaces is configured to flex laterally to the central longitudinal axis, the second end being a free end configured to flex relative to the first end;
a limiter disposed near the second end of each of the projecting surfaces and extending into the chamber; and
first and second grooves extending longitudinally in the chamber; and
an insert portion extending along the central longitudinal axis including:
a plurality of apertures, for receiving a bone fastener for attachment to a second vertebral body of the patient, wherein the plurality of apertures are laterally offset from the central longitudinal axis;
a projection sized to be longitudinally received in the chamber of the receiver portion and having first and second rails corresponding to the respective grooves; and
two catches disposed on the projection, each catch of the two catches configured to engage one of the limiters when the chamber receives the projection, the second end of each projecting surface configured to flex so as allow each limiter to admit passage of each catch when the projection is received in the chamber.

13 . The device of claim 12 , wherein each limiter is shaped to prevent the projection from backing out of the chamber once the catch passes the limiter when the projection is received in the chamber.

14 . The device of claim 12 , wherein the receiver portion includes an opening in communication with the chamber, the opening including a plurality of regularly spaced indicating formations indicative of the extent of compression.

15 . The device of claim 14 , wherein the opening exposes at least a portion of a distal end of the projection and a longitudinal position of the distal end of the projection relative to the plurality of indicating formations indicates the extent of compression.

16 . The device of claim 14 , wherein the indicating formations include first and second sets of oppositely positioned depth indicators.

17 . The device of claim 12 , further comprising a through hole centrally positioned along the central longitudinal axis and in communication with the chamber, the through hole configured to receive a disengagement tool for resiliently bending the projecting surfaces to disengage the limiters from each catch.

18 . The device of claim 14 , further comprising a through hole centrally positioned along the central longitudinal axis and in communication with the chamber, the through hole configured to receive a disengagement tool for resiliently bending the projecting surfaces to disengage the limiters from each catch.

19 . The device of claim 12 , wherein each limiter has a ramped surface on one side and a blocking surface on the other side.

20 . The device of claim 19 , wherein each catch includes a blocking surface mateably engageable with the blocking surface of each limiter to prevent telescoping apart of the insert portion and the receiver portion.

Assignees

• Globus Medical Inc

Inventors

• Angelucci Christopher
• Black Michael
• Garvey Brian
• Himmelberger James
• Mclaughlin Colm
• Trout Robert W

Classifications

• A61B17/8023

  Variable length plates adjustable in both directions · CPC title

• A61B17/8009

  the plate having a ratchet · CPC title

• A61B17/7059 Primary

  Cortical plates (A61B17/7007, A61B17/7058 take precedence) · CPC title

• A61B17/8004 Primary

  with means for distracting or compressing the bone or bones · CPC title