Non-circular stabilization sphere and method

An intervertebral device comprising:

• a first section having a first radius and a center point positioned along a longitudinal centerline;
• and
• a second section in overlapping arrangement with the first section, the second section having a second radius that is centered on the longitudinal centerline;
• the first and second sections having exterior surfaces that merge together forming an overall non-spherical shape.

An intervertebral device comprising:

• a spherical section;
• a second section extending outward in a first direction from the spherical section;
• and
• an attachment means on the posterior section opposite from the second section for inserting the device into an intervertebral space.

An intervertebral device for positioning between vertebral members, the device comprising;

• a first spherical section;
• a second section extending outward from a side of the first section;
• and
• an attachment feature positioned on the first section opposite from the second section;
• the device having an elongated, non-spherical overall shape when positioned between the vertebral members for the attachment means to be spaced from the vertebral members.

An intervertebral device to position between vertebral members, the device comprising:

• a first section having an arcuate exterior surface;
• a second section extending outward in a first direction from the first section;
• and
• an attachment feature positioned in the first section opposite from the second section;
• the arcuate exterior surface being in contact with the vertebral members with the second section extending outward a distance to minimize movement of the first section to maintain the attachment feature spaced from the vertebral members.