Spinal treatment devices, systems and methods

An orthopedic system for treating a spinal condition, comprising:

• a rod;
• a tether;
• a set screw including:
• a cylindrical shaft, a first end of the cylindrical shaft configured to physically abut the rod and apply compressive force to the rod,
• a helical inclined plane winding around the cylindrical shaft and configured to engage with a corresponding helical inclined plane,
• a head at a second end of the cylindrical shaft, the head to be manipulated during tightening or loosening of the set screw to rotate the cylindrical shaft, and
• an eyelet disposed at the head of the cylindrical shaft, the eyelet configured to receive the tether therethrough to secure a first portion of the tether relative to a fused portion of a spinal column to be treated, wherein a second portion of the tether is configured to be secured to a non-fused portion of the spinal column to be treated;
• and
• a pedicle screw to be inserted into a pedicle of a vertebra of a fused portion of the spinal column to be treated, the pedicle screw including:
• a shaft with a plurality of male threads wrapping around the shaft, the shaft configured to be inserted into the vertebra of the fused portion of the spinal column to be treated, and
• a tulip including a channel to receive the rod within the tulip and a conduit with a helical inclined plane configured to engage and mate with the helical inclined plane of the set screw and to receive the first end of the cylindrical shaft within the conduit of the tulip to secure the rod within the tulip.