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US 2026/0263234 A1Published application
Expandable interbodies and related methods
AssigneeAlphatec Spine, Inc.
InventorsWilliam Reimels, Max C. Zemezonak, Thomas Henry Hackathorn, Elizabeth Alexis Lukianov, Graham Witherby
Life of this patent
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Abstract
The present disclosure relates to expandable interbodies that include superior and inferior shells and a control assembly positioned between and inside of the shells, the control assembly including nested cages operably connected to each other with an adjustment screw. Rotation of the adjustment screw translates the cages relative to each other, which in turn causes the shells to open or expand.
Claims20
An expandable interbody comprising:
- a control assembly;
- a superior shell engaged with the control assembly, the superior shell having first and second lateral sides and a superior surface at least partially defined by a superior plane;
- and
- an inferior shell engaged with the control assembly, the inferior shell having first and second lateral sides and an inferior surface at least partially defined by an inferior plane;
- wherein:
- the control assembly is positioned between the superior and inferior shells, the control assembly is configured to move the superior and inferior shells from a collapsed configuration to an expanded configuration;
- the control assembly comprises:
- an adjustment screw defining a first axis,
- a proximal cage threadingly engaged to the adjustment screw, and
- a distal cage secured to the adjustment screw;
- and
- rotation of the adjustment screw causes the proximal and distal cages to translate relative to each other along the first axis;
- and
- the proximal end of the superior and inferior shells defines a line that is not perpendicular to either of the respective first or second lateral sides.
11 more elements
Dependencies are inferred from the claim text.