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US 2014/0277510 A1Published application
Expandable vertebral body replacement device, system, and methods
AssigneeSpectrum Spine IP Holdings, LLC
InventorsJames C. Robinson, John E. Pendleton
Life of this patent
Estimating the term…
Abstract
An expandable vertebral body replacement is presented. The device has an inner and outer housing longitudinally moveable on one-another which locks in place using a retention member. This can be locked or fortified by several described options. Also presented is a method for expanding said device embodiments and a system for an expandable vertebral body replacement.
Claims18
A vertebral body replacement device comprising:
- an outer housing defining an interior cavity and having an interior toothed surface;
- an inner housing nesting within at least a portion of the interior cavity of the outer housing, the inner housing moveable along a longitudinal direction to increase a height of the vertebral body replacement device;
- a retention member removably engageable with a portion of the inner housing, the retention member defining at least one outer edge that is cammed and complimentary to the interior toothed surface of the outer housing, wherein the retention member, when positioned in engagement with the inner housing, permits expansion of the vertebral body replacement device while preventing contraction of the vertebral body replacement device;
- an upper bone contact member having an upper bone contact surface;
- and
- a lower bone contact member having a lower bone contact surface.
3 more elements
A method for replacing a vertebral body comprising the steps of:
- accessing a desired motion segment;
- removing a desired vertebral body;
- positioning an expandable VBR device in place of the removed vertebral body;
- expanding the expandable VBR device;
- and
- fixing the expandable VBR device in the expanded position;
- and
- wherein the VBR device comprises:
- an outer housing defining an interior cavity and having an interior toothed surface;
- an inner housing nesting within at least a portion of the interior cavity of the outer housing, the inner housing moveable along a longitudinal direction to increase a height of the VBR device;
- a retention member removably engageable with a portion of the inner housing, the retention member defining at least one outer edge that is cammed and complimentary to the interior toothed surface of the outer housing, wherein the retention member, when positioned in engagement with the inner housing, permits expansion of the vertebral body replacement device while preventing contraction of the vertebral body replacement device;
- an upper bone contact member having an upper bone contact surface;
- and
- a lower bone contact member having a lower bone contact surface.
11 more elements
A system for replacing a vertebral body comprising:
- an expandable VBR device comprising:
- an outer housing defining an interior cavity and having an interior toothed surface;
- an inner housing nesting within at least a portion of the interior cavity of the outer housing, the inner housing moveable along a longitudinal direction to increase a height of the expandable VBR device;
- a retention member removably engageable with a portion of the inner housing, the retention member defining at least one outer edge that is cammed and complimentary to the interior toothed surface of the outer housing, wherein the retention member, when positioned in engagement with the inner housing, permits expansion of the VBR device while preventing contraction of the expandable VBR device;
- an upper bone contact member having an upper bone contact surface:
- and
- a lower bone contact member having a lower bone contact surface;
- and
- a VBR expansion tool.
6 more elements
Dependencies are inferred from the claim text.