A system and method for ameliorating spinal column anomalies, such as scoliosis, includes bone screws which are to be implanted in the pedicle region of individual to-be-derotated vertebrae and in vertebrae to which balancing forces must be applied as the spinal column is manipulated en mass to achieve an over-all correction of the condition. A plurality of buffers is visited in a variable round robin manner. For most applications, the coating material is formulated or includes additives whereby it solidifies on the sheathing to form a coating layer that has an exterior facing, textured surface.