Lower Extremity Orthotics
An orthosis is classified as a static or dynamic device. A static orthosis is rigid and is used to support the weakened or paralyzed body parts in a particular position. A dynamic orthosis is used to facilitate body motion to allow optimal function. In all orthotic devices, 3 points of pressure are needed for proper control of a joint.
An ankle-foot orthosis (AFO) is an externally applied orthopedic appliance which is designed to protect, support and prevent or correct deformity of the foot, ankle and lower leg complex.
A knee-ankle-foot orthosis (KAFO) is an externally applied orthopedic appliance which encompasses the foot, ankle, lower leg, knee and thigh. The KAFO provides the features of an AFO but in addition provides protection, correction and support of the knee joint.
A hip-knee-ankle-foot orthosis (HKAFO) consists of a trunk section connected to two KAFOs by two lateral hip joints. These joints usually have locks that can be disengaged for sitting. Movement with an HKAFO is achieved by a swing through type movement with the assistance of either a walker or forearm crutches with both legs are moved together as one unit.