Long-term Retrospective of the Kaneda Anterior Scoliosis System in Thoracic Adolescent Idiopathic Scoliosis

Journal of Pediatric Orthopaedics , 05/16/2012

The authors consider an main thoracic curve (MTC)≥70 degrees a likely contraindication for Kaneda Anterior Scoliosis System (KASS) instrumentation for thoracic adolescent idiopathic scoliosis (AIS). Four of the 5 failures were fused short of the end vertebrae either proximally, distally, or both. Although short apical fusions were popular during the time these cases were done, fusion to the end vertebrae is an important principle for anterior fusions. Reaching the upper end vertebrae may be more difficult in these larger curves. The authors also recommend continued follow–up past 2 years as progression can occur after this time.

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