An Ankle-foot orthotic is a brace, usually made of plastic that supports your foot, ankle and lower leg.  Ankle-foot orthotics are used in cases where there is a need to support not just the foot but also the ankle in a more controlled and restrictive manner.  Often the patient that requires this type of device has had or needs major reconstructive foot and ankle surgery, has a neuromuscular disease, or has had some degree of nerve damage which requires more than the standard degree of support offered by a foot orthotic alone.