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US 2019/0290447 A1Published application
Expandable Fusion Implant and Related Methods
AssigneeNuVasive, Inc.
InventorChristopher Stein
Life of this patent
Estimating the term…
Abstract
An expandable spinal fusion implant including first and second endplates coupled to an expansion member that sits within a housing. The expansion member is translated by a drive mechanism, whereby translation of the expansion member by the drive mechanism in a distal and proximal directions causes the distance between the endplates to increase and decrease, respectively.
Claims20
An expandable fusion implant, comprising:
- first and second endplates each having a bone contacting surface;
- a housing;
- an expansion mechanism configured to translate on a plurality of rails at least partially disposed within the housing;
- and
- a drive mechanism having a head, a shaft extending from the head and terminating in a distal end, the shaft dimensioned to be received through an aperture in a proximal wall of the housing and the distal end configured to be received within a recess in the expansion mechanism;
- wherein the drive mechanism is configured to translate the expansion mechanism relative to a distal wall of the housing, and the expansion mechanism is configured to change a distance between the first and second endplates.
3 more elements
An expandable fusion implant, comprising:
- first and second endplates each having a bone contacting surface and an interior surface, the interior surface of each of the first and second endplates including a first and second ramped portions;
- an expansion mechanism having a first wedge and a second wedge that engage the first and second ramped portions of the first endplate and the first and second ramped portions of the second endplate;
- a housing defined by opposing lateral walls, a distal wall and a proximal wall, the housing having at least one rail retained at least partially in the housing with the expansion mechanism configured to ride on the at least one rail;
- and
- a drive mechanism having a head, a shaft extending from the head and terminating in a distal end, the shaft dimensioned to be received through an aperture in the proximal wall of the housing and the distal end configured to be received within a recess in the expansion mechanism;
- wherein rotation of the shaft in a first direction translates the expansion mechanism toward the distal wall of the housing, the expansion mechanism configured to move the endplates relative to the housing to increase the distance between the endplates.
3 more elements
An expandable fusion implant, comprising:
- first and second endplates each having a bone contacting surface and an interior surface with a central fusion aperture extending there between, the interior surface of each of the first and second endplates including a first and second ramped portions;
- an expansion mechanism having a first wedge and a second wedge that engage the first and second ramped portions of the first endplate and the first and second ramped portions of the second endplate;
- a housing defined by opposing lateral walls, a distal wall and a proximal wall, the housing having at least one rail retained at least partially in the housing with the expansion mechanism configured to ride on the at least one rail;
- and
- a drive mechanism having a head, a shaft extending from the head and terminating in a distal end, the shaft dimensioned to be received through an aperture in the proximal wall of the housing and the distal end configured to be received within a recess in the expansion mechanism;
- wherein rotation of the shaft translates the expansion mechanism relative to the distal wall of the housing.
3 more elements
Dependencies are inferred from the claim text.