Orthotists are healthcare professionals who specialize in the provision of orthoses. Individuals frequently use crutches, knee, ankle, and/or foot orthoses, or wheelchairs. Evidence for long term use of foot orthoses for adolescents is uncertain. Many mobility problems can be improved by the use of ankle foot orthoses. No evidence supports use of custom made foot orthoses. Physical therapists are not legally authorized to prescribe orthoses in the U.S. There is moderate evidence that orthoses (splints) can improve hand function at long-term follow-up. When foot orthoses are indicated, inexpensive generic appliances will usually suffice. The pain and discomfort affecting these body parts can be alleviated by using custom orthoses. It has also been suggested that ankle-foot orthoses be prescribed for these patients. Spinal orthoses may also be used in the treatment of spinal fractures. Foot orthoses however do not appear to help with heel pain. Orthotic devices, or orthoses, are devices used to align, brace, or correct deformities. Equally, orthoses are sometimes used prophylactically or to optimise performance in sport.