Expandable interbody device
First Claim
Patent Images
1. An expandable interbody device for placement between adjacent vertebrae comprising:
- an upper structure comprising an upper proximal angled surface and an upper distal angled surface;
a lower structure comprising a lower proximal angled surface and a lower distal angled surface, the lower structure configured to slideably couple with the upper structure; and
a screw mechanism between the upper structure and the lower structure, the screw mechanism comprising;
a proximal section comprising a proximal frustoconical surface;
a distal section comprising a distal frustoconical surface; and
a coupler comprising a proximal side configured to engage the proximal section and a distal side configured to engage the distal section;
wherein the proximal section and the distal section are configured to rotate as a unit to change a length of the screw mechanism from a first length to a second length;
wherein the coupler further comprises at least one anti-rotational feature configured to engage the upper structure or the lower structure to prevent the coupler from rotating when the proximal section and the distal section are rotated;
wherein the proximal frustoconical surface is configured to engage the upper proximal angled surface and the lower proximal angled surface, and the distal frustoconical surface is configured to engage the upper distal angled surface and the lower distal angled surface to move the upper structure and the lower structure from a first distance to a second distance.
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Abstract
An expandable interbody device for placement between adjacent vertebrae having an upper structure, a lower structure and a screw mechanism, wherein actuation of the screw mechanism moves the upper and lower structures between a collapsed configuration and an expanded configuration. A deployment tool couples to the expandable interbody device for positioning the device between adjacent vertebrae, actuating the screw mechanism and delivering a material to a chamber of the expandable interbody device.
79 Citations
10 Claims
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1. An expandable interbody device for placement between adjacent vertebrae comprising:
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an upper structure comprising an upper proximal angled surface and an upper distal angled surface; a lower structure comprising a lower proximal angled surface and a lower distal angled surface, the lower structure configured to slideably couple with the upper structure; and a screw mechanism between the upper structure and the lower structure, the screw mechanism comprising; a proximal section comprising a proximal frustoconical surface; a distal section comprising a distal frustoconical surface; and a coupler comprising a proximal side configured to engage the proximal section and a distal side configured to engage the distal section; wherein the proximal section and the distal section are configured to rotate as a unit to change a length of the screw mechanism from a first length to a second length;
wherein the coupler further comprises at least one anti-rotational feature configured to engage the upper structure or the lower structure to prevent the coupler from rotating when the proximal section and the distal section are rotated;
wherein the proximal frustoconical surface is configured to engage the upper proximal angled surface and the lower proximal angled surface, and the distal frustoconical surface is configured to engage the upper distal angled surface and the lower distal angled surface to move the upper structure and the lower structure from a first distance to a second distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification