Spinal implant system and method

A spinal implant system comprising:

• a first member extending along a longitudinal axis between opposite first and second ends, the first member being curved along the longitudinal axis from the first end to the second end, the first member comprising an inner surface, the inner surface defining a bore and a first thread;
• a second member comprising opposite proximal and distal ends, the second member being curved from the proximal end to the distal end, the distal end being positioned in the bore, the proximal end comprising an end plate, the second member comprising a second thread engaged with the first thread, the second thread comprising a series of gear teeth;
• a third member comprising opposite proximal and distal ends, the third member being curved from the proximal end of the third member to the distal end of the third member, the proximal end of the third member being positioned in the bore, the distal end of the third member comprising an end plate;
• a driver comprising a gear configured to engage the gear teeth such that rotation of the driver relative to the first member and the second member rotates the second member relative to the first member to translate the second member relative to the first member along the longitudinal axis;
• and
• a collar positioned about a sleeve of the third member, the collar comprising a third thread, the sleeve comprising a fourth thread engaged with the third thread, the fourth thread comprising a series of gear teeth configured to engage the gear such that rotation of the driver relative to the collar and the third member rotates the collar relative to the third member to translate the collar relative to the third member along the longitudinal axis,
• wherein the third member moves between a first orientation in which the proximal end of the third member is positioned within the second member and a second orientation in which the third member is spaced apart from the second member as the second member translates relative to the first member along the longitudinal axis.

A spinal implant system comprising:

• a first member extending along a longitudinal axis between opposite first and second ends, the first member being curved along the longitudinal axis from the first end to the second end, the first member comprising an inner surface, the inner surface defining a bore and a first thread;
• a second member comprising opposite proximal and distal ends, the second member being curved from the proximal end to the distal end, the distal end being positioned in the bore, the proximal end comprising an end plate, the second member comprising a second thread engaged with the first thread, the second thread comprising a series of gear teeth;
• a third member comprising opposite proximal and distal ends, the third member being curved from the proximal end of the third member to the distal end of the third member, the proximal end of the third member being positioned in the bore, the distal end of the third member comprising an end plate;
• a driver comprising a gear configured to engage the gear teeth such that rotation of the driver relative to the first member and the second member rotates the second member relative to the first member to translate the second member relative to the first member along the longitudinal axis;
• and
• a collar positioned about a sleeve of the third member, the collar comprising a third thread, the sleeve comprising a fourth thread engaged with the third thread, the fourth thread comprising a series of gear teeth configured to engage the gear such that rotation of the driver relative to the collar and the third member rotates the collar relative to the third member to translate the collar relative to the third member along the longitudinal axis,
• wherein the longitudinal axis is a first longitudinal axis, the third member extending along a second longitudinal axis from the proximal end of the third member to the distal end of the third member, the third member moving from a first orientation to a second orientation as the collar translates relative to the third member along the first longitudinal axis, the collar having a first radius of curvature when the third member is in the first orientation and a second radius of curvature when the third member is in the second orientation, the second radius of curvature being different than the first radius of curvature, and
• wherein the second member extends along a third longitudinal axis from the proximal end of the second member to the distal end of the second member, the second member moving from a third orientation to a fourth orientation as the second member translates relative to the first member along the first longitudinal axis, the second member having a third radius of curvature when the second member is in the third orientation and a fourth radius of curvature when the second member is in the fourth orientation, the fourth radius of curvature being different than the third radius of curvature.