Primary Objective: To evaluate the use of unilateral or bilateral VEPTR devices, with or without expansion thoracoplasty, for preventing further progression of the Cobb angle, allowing for spinal growth and improving pulmonary function in the treatment of children with progressive scoliosis without rib abnormalities.
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The patient's Cobb angle at the final surgery is less than or equal to the patient's pre-operative Cobb angle
Timeframe: Anticipate 6 years
The patient's trunk height or spinal length at final surgery is greater than or equal to the patient's immediate post-operative trunk height or spinal length
Timeframe: Anticipate 6 years