An orthopedic appliance includes a slab configured to be placed underneath a big toe, forward of and not extending under a head of a first metatarsal, and wherein the slab has a predetermined height and is configured to deflect a proximal phalanx upwardly relative to the first metatarsal. A method for improving stability of a foot during ambulation includes placing an orthopedic appliance, having a predetermined height, under a big toe such that the orthopedic appliance is located forward of and does not extend under a head of a first metatarsal of the big toe; and deflecting a proximal phalanx upwardly relative to the first metatarsal.