Where should the axillary extension of a Boston style scoliosis orthosis for a double curve be located?

The axillary extension of a Boston style scoliosis orthosis for a double curve should be positioned from the widow (inferior scapular angle) to about T5. This positioning is vital for adequate correction of the scoliotic curvature while allowing for proper trunk support and balance.

When the extension is situated in this manner, it provides necessary leverage to keep the patient’s spine in alignment and helps in managing the thoracic deformity effectively. It also helps to stabilize both curvature areas, working to minimize progression of the scoliosis while facilitating proper postural alignment.

Positioning the axillary extension at the level of the shoulder or below T7 would not offer the optimal support needed for a double curve presentation. Such placements could either overlook the critical thoracic segments that need to be addressed or could lead to insufficient corrective force across the curves. Similarly, placing the axillary extension at the midline of the torso would not adequately address the specific curvatures and could compromise the overall effectiveness of the orthosis in managing scoliotic deformities.