16. A method of correcting a spinal deformity of a patient's spinal column, the method comprising: securing a first rod anchor to a first vertebra of the patient's spine; securing a second rod anchor to a second vertebra of the patient's spine; coupling a first rod to the first rod anchor and the second rod anchor such that: the first rod is laterally constrained relative to the first rod anchor while being free to slide axially and to change in alignment relative to the first rod anchor; and the first rod is laterally constrained relative to the second rod anchor while being free to slide axially and to change in alignment relative to the second rod anchor; securing a third rod anchor to a third vertebra of the patient's spine; securing a fourth rod anchor to a fourth vertebra of the patient's spine; coupling a second rod to the third rod anchor and the fourth rod anchor such that: the second rod is laterally constrained relative to the third rod anchor while being free to slide axially and to change in alignment relative to the third rod anchor; and the second rod is laterally constrained relative to the fourth rod anchor while being free to slide axially and to change in alignment relative to the fourth rod anchor; and coupling the first rod with the second rod such that the coupling facilitates derotation and translation of the spinal deformity, wherein one or more of the first, second, third, and fourth rod anchors provides for selective locking of one or more of pitch, yaw, and roll.
16. A method of correcting a spinal deformity of a patient's spinal column, the method comprising: securing a first rod anchor to a first vertebra of the patient's spine; securing a second rod anchor to a second vertebra of the patient's spine; coupling a first rod to the first rod anchor and the second rod anchor such that: the first rod is laterally constrained relative to the first rod anchor while being free to slide axially and to change in alignment relative to the first rod anchor; and the first rod is laterally constrained relative to the second rod anchor while being free to slide axially and to change in alignment relative to the second rod anchor; securing a third rod anchor to a third vertebra of the patient's spine; securing a fourth rod anchor to a fourth vertebra of the patient's spine; coupling a second rod to the third rod anchor and the fourth rod anchor such that: the second rod is laterally constrained relative to the third rod anchor while being free to slide axially and to change in alignment relative to the third rod anchor; and the second rod is laterally constrained relative to the fourth rod anchor while being free to slide axially and to change in alignment relative to the fourth rod anchor; and coupling the first rod with the second rod such that the coupling facilitates derotation and translation of the spinal deformity, wherein one or more of the first, second, third, and fourth rod anchors provides for selective locking of one or more of pitch, yaw, and roll. 18. The method of claim 16 , wherein the first rod extends along a first side of the patient's spine and the second rod extends along a second side of the patient's spine opposite to the first side.