A spinal correction system comprising: an expandable trial implant which is movable between a compressed position and an expanded position; a neural release system ; a load and contact system ; a neural spacing monitoring system ; and a plurality of load cells for monitoring a load on the expandable trial implant; in which: the expandable trial implant is adapted to be disposed in an intervertebral disc space after removal of a portion of the disc tissue; the load cells are arranged to communicate with the load and contact system to provide information about the load on the expandable trial implant as it is being expanded in the disc space; the load and contact system is arranged to provide information representing the load information to the neural release system, and the neural release system arranged to compare the load information to a load threshold and to indicate when the load information exceeds the load threshold; and the neural spacing monitoring system is arranged to provide information representative of a neural foramen spacing of a neural foramen located proximate the intervertebral disc space to the neural release system, and the neural release system arranged to compare the information representative of the neural foramen spacing to a predefined foramen spacing parameter, to determine whether to remove more of the disc. an expandable trial implant which is movable between a compressed position and an expanded position; a neural release system ; a load and contact system ; a neural spacing monitoring system ; and a plurality of load cells for monitoring a load on the expandable trial implant; in which: the expandable trial implant is adapted to be disposed in an intervertebral disc space after removal of a portion of the disc tissue; the load cells are arranged to communicate with the load and contact system to provide information about the load on the expandable trial implant as it is being expanded in the disc space; the load and contact system is arranged to provide information representing the load information to the neural release system, and the neural release system arranged to compare the load information to a load threshold and to indicate when the load information exceeds the load threshold; and the neural spacing monitoring system is arranged to provide information representative of a neural foramen spacing of a neural foramen located proximate the intervertebral disc space to the neural release system, and the neural release system arranged to compare the information representative of the neural foramen spacing to a predefined foramen spacing parameter, to determine whether to remove more of the disc. the expandable trial implant is adapted to be disposed in an intervertebral disc space after removal of a portion of the disc tissue; the load cells are arranged to communicate with the load and contact system to provide information about the load on the expandable trial implant as it is being expanded in the disc space; the load and contact system is arranged to provide information representing the load information to the neural release system, and the neural release system arranged to compare the load information to a load threshold and to indicate when the load information exceeds the load threshold; and the neural spacing monitoring system is arranged to provide information representative of a neural foramen spacing of a neural foramen located proximate the intervertebral disc space to the neural release system, and the neural release system arranged to compare the information representative of the neural foramen spacing to a predefined foramen spacing parameter, to determine whether to remove more of the disc. <EOS>