Adjustable magnetic devices and methods of using same

A system comprising:

• a first pedicle screw;
• a second pedicle screw separated from the first pedicle screw by a distance;
• and
• an adjustable rod comprising:
• an outer housing configured to affix to the first pedicle screw, the outer housing having a threaded shaft secured to one end thereof and extending along an interior portion thereof;
• an inner shaft configured to affix to the second pedicle screw, at least a portion of the inner shaft being telescopically adjustable within the outer housing;
• and
• a magnetic assembly disposed at least partially within the outer housing and comprising a magnetic element disposed around at least a portion of the threaded shaft, the magnetic assembly having an internal threaded surface configured to engage the threaded shaft,
• wherein the magnetic assembly is rotatably coupled to the inner shaft by a rotational coupling;
• wherein the magnetic assembly is configured to rotate in response to an externally applied magnetic field, thereby increasing or decreasing the distance between the first pedicle screw and the second pedicle screw.