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This patent has just been granted: Plantar-Flexion Restraint Device
A device for a subject having plantar fasciitis, the device comprising: (a) an elastic sock (10), (b) a leg binding (15) and (c) an elastic strap (20), wherein in use the elastic strap extends from adjacent a toe portion of the elastic sock to the leg binding so as to restrain the plantar fascia from flexion, yet permits the subject to walk and exercise the plantar fascia.
One such device for treatment of plantar fascia is described in U.S. Pat. No. 5,399,155 (Strassburg et al) and consists of an over the calf sock having a reinforced adjustable support strap attached around the upper portion of the sock with a "D" ring attached to the front (shin) side. A reinforced inelastic adjustable strap is attached to the toe of the sock, with a hook and loop assembly attached for closure. When this strap is passed through the "D" ring and secured by means of the hook and loop assembly, the plantar fascia can be maintained in the desired position. One of the disadvantages of this type of device, and many other orthotic devices, is that they hold the foot quite rigid so the wearer cannot walk. The device of U.S. Pat. No. 5,399,155 has an inelastic support strap hindering the normal action of the foot and ankle during walking hence use of the device is limited to times when the wearer is asleep or resting. Furthermore, solely treating heel spur by holding the plantar fascia in a neutral position and preventing movement or exercise is unlikely to cure heel spur.
 Accordingly there is a need for a device having wider applicability, which can be used when the wearer is mobile as well as when they are sleeping or resting.