Expandable bone core for pedicle screw fixation

An expandable implant for positioning in a spine comprising:

• an expandable anchor having a body with a plurality of expandable sections separated by one or more expansion joints, the anchor includes a central through hole arranged along a central longitudinal axis of the anchor;
• and
• a pedicle screw having a head and a shaft, wherein the pedicle screw is receivable in the expandable anchor, and wherein the expandable anchor has a collapsed configuration and an expanded configuration, wherein in the expanded configuration, the expandable anchor is configured to press fit in adjacent bone,
• wherein each of the one or more expansion joints comprise a length greater than a width, the length extending parallel to the central longitudinal axis of the anchor, and each of the one or more expansion joints comprise a resilient material configured to allow expansion of the expandable anchor while maintaining connection of the plurality of expandable sections to each other,
• the expandable anchor is configured to be positioned in a pedicle of the spine,
• the head of the pedicle screw includes a tulip for receiving and securing a rod, and
• the tulip of the pedicle screw is configured to protrude out of the vertebra.