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US 11,696,836 B2Granted
Lordotic expandable interbody implant
AssigneeNuVasive, Inc.
InventorsChristopher Stein, Seth Gustine
Life of this patent
Estimating the term…
Abstract
An expandable spinal fusion implant including a housing, upper and lower endplates, a wedge positioned within the housing and between the upper and lower endplates and a drive mechanism to urge the wedge distally between the upper and lower endplates to increase the separation between the endplates and expand the overall height of the distal end of the implant.
Claims20
An expandable spinal fusion implant, comprising:
- a housing having a hollow interior defined by a proximal endwall, a distal endwall, an anterolateral sidewall, and a posterolateral sidewall;
- an upper endplate moveably attached to the housing and having a first interior surface including a first ramp, and a lower endplate moveably coupled to the housing and having a second interior surface including a second ramp;
- a wedge positioned within the housing between the first interior surface and second interior surface, the wedge including a first surface that engages the first ramp and a second surface that engages the second ramp;
- and
- a drive mechanism configured to drive the wedge moving the upper endplate and the lower endplate from a collapsed configuration to an expanded configuration, with the upper endplate and the lower endplate forming a height which increases across the upper endplate and the lower endplate from a proximal end towards a distal end,
- wherein the drive mechanism engages the wedge and the proximal wall of the housing, and wherein the distal wall of the housing is free of the drive mechanism.
3 more elements
An expandable spinal fusion implant, comprising:
- a housing having a hollow interior defined by a proximal endwall, a distal endwall, an anterolateral sidewall, and a posterolateral sidewall;
- an upper endplate moveably attached to the housing and having a first interior surface including a first ramp, and a lower endplate moveably coupled to the housing and having a second interior surface including a second ramp;
- a wedge positioned within the housing between the first interior surface and second interior surface, the wedge including a first surface that engages the first ramp and a second surface that engages the second ramp;
- and
- a drive mechanism configured to drive the wedge moving the upper endplate and the lower endplate from a collapsed configuration to an expanded configuration, with the upper endplate and the lower endplate forming a height which increases across the upper endplate and the lower endplate from a proximal end towards a distal end,
- wherein the drive mechanism includes a proximal end, a distal end, and a shaft extending between the proximal end and the distal end, wherein the shaft engages the proximal wall of the housing, and wherein the distal wall of the housing is free of the shaft.
3 more elements
Dependencies are inferred from the claim text.