Vertebral growth modulating directional hinged end-to-end rod connector

A device that applies a distraction force on parts of an outer curved surface, comprising:

• a first pedicle screw configured to be attached to a first part of the outer curved surface;
• a second pedicle screw configured to be attached to a second part of the outer curved surface;
• a first spinal rod configured to be positioned in a head of the first pedicle screw;
• a first tip set screw configured to be screwed into the head of the first pedicle screw to securely hold a part of the first spinal rod in the head of the first pedicle screw;
• a second spinal rod configured to be positioned in a head of the second pedicle screw;
• a second tip set screw configured to be screwed into the head of the second pedicle screw to securely hold a part of the second spinal rod in the head of the second pedicle screw;
• a distraction hinge, comprising:
• a first sleeve configured to receive a terminal end of the first spinal rod,
• a second sleeve configured to receive a terminal end of the second spinal rod,
• a distraction hinge spring sleeve,
• a first pair of swage pin sleeves, and
• a second pair of swage pin sleeves;
• a distraction hinge spring configured to be placed in the distraction hinge spring sleeve;
• a first swage pin configured to pass through the first pair of swage pin sleeves in the distraction hinge while passing through a spinal rod sleeve in the terminal end of the first spinal rod;
• a second swage pin configured to pass through the second pair of swage pin sleeves in the distraction hinge while passing through a spinal rod sleeve in the terminal end of the second spinal rod;
• and
• a distraction hinge tip set screw configured to adjustably increase or decrease a biasing force on the distraction hinge spring that increases or decreases a distraction biasing force applied on the first part and the second part of the outer curved surface.

A method of straightening a curved spine having an outer curved surface and an inner curved surface, comprising the steps of:

• screwing a first pedicle screw into a first spine vertebra along the outer curved surface of the curved spine;
• screwing a second pedicle screw into a second spine vertebra along the outer curved surface of the curved spine;
• attaching a first end of a first spinal rod into a first distraction hinge spinal rod sleeve of a distraction hinge using a first swage pin;
• attaching a first end of a second spinal rod into a second distraction hinge spinal rod sleeve of the distraction hinge using a second swage pin;
• attaching a second end of the first spinal rod to a head of the first pedicle screw using a first tip set screw;
• attaching a second end of the second spinal rod to a head of the second pedicle screw using a second tip set screw;
• placing a spring into a distraction hinge spring sleeve of the distraction hinge;
• and
• screwing a tip set screw into the distraction hinge to compress the spring so as to push on the first end of the first spinal rod and the first end of the second spinal rod to thereby cause a distraction force between the first spine vertebra and the second spine vertebra.