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The TriaCII orthosis for treatment of adolescent
idiopathic scoliosis (AIS) from Boston Brace International, Avon,
Massachusetts, is a dynamic tension-based orthosis in which the
forces acting on the spine are able to move with the patient,
rather than being static, as with conventional bracing, explains
James “Jim” Wynne, CPO, Boston Brace director of Education and
Training. “The whole premise of tension-based dynamic bracing is
that you have a lower force that moves with the patient,” Wynne
continues. “Thus those forces are in constant contact with the
patient, so we maximize the time over which the force acts. It is a
custom-fitted orthosis that consists of two parts: lumbar and
thoracic. The lumbar part does not restrict lumbar motion; it
maintains the motion segment. The thoracic part consists of tension
springs that are adjusted to patient tolerance. A unique coupling
mechanism allows the two parts to move with each other.”
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