What is the treatment aim of hyperextension orthoses like CASH and Jewett?

The primary aim of hyperextension orthoses such as CASH (Cruciform Anterior Spinal Hyperextension) and Jewett braces is to unload the fracture site in the lumbar and thoracic spine. These devices apply a hyperextension force that helps to stabilize the spine by keeping it in a position that reduces stress on the affected vertebral bodies. This unloading effect is particularly beneficial for patients with spinal fractures, as it can help prevent further injury and promote healing.

In addition, these orthoses work by preventing flexion at the affected spinal segments, which decreases pain and supports the healing process through better alignment and stabilization. By effectively reducing compressive forces on the spine, hyperextension orthoses allow for a more conducive environment for fracture recovery, making this approach a key component in conservative management of spinal injuries.