A concept of idiopathic scoliosis deformities as imperfect torsion(s)

Scoliosis is a complex three-dimensional deformity. With continued improvem ent in spinal implant design, the options for corrective load application h ave increased. Visualization of the scoliosis deformity as a torsion or tor sions, similar to an elongated helical line, and integration of this visual ization with current deformity classification have proven useful in develop ing instrumentation sequences addressing scoliosis as a three-dimensional d eformity. These instrumentation sequences, which have been evolving since 1 989, have been applied in more than 150 patients who show improved deformit y correction without serious complications.