Abstract: The invention is an ankle derotation and subtalar stabilization system that incorporates a pivoting adjustable-tension oblique tether strap that is anchored to both a forefoot component and leg component, and that is contiguous with pivoting adjustable-tension derotation strap that passes behind the leg and that is secured to a leg component. The system restrains oppositely directed rotation between the foot and the leg, and can actually after the normal biochemical relationship in a manner that produces foot rotation in a direction opposite to that which is normally coupled with leg rotation, without restriction of upward and downward foot movement. The primary application for the system is restraint of excessive subtalar joint inversion, leg external rotation, and anterolateral rotary displacement of the talus, but it can also be configured to restrain subtalar eversion and leg internal rotation through its incorporation into the structure of an ankle orthosis or shoe.

Abstract: The invention is a stirrup-type ankle brace that is designed to effectively perform two functions when applied to either a right extremity or a left extremity: 1) dispersal of swelling associated with an ankle sprain, and 2) restraint of excessive joint displacement that would otherwise impose stress on the ankle ligaments. The unique characteristic of the invention is its adaptability to differing anatomical contours on the medial (inner) and lateral (outer) aspects of the right and left extremities, which is achieved through multiple pivoting connections between semi-rigid brace components and adjustable-tension straps, along with symmetrical relationships between all brace components. Thus, the positioning of the moveable and adjustable brace components can be altered to produce either one of two mirror-imaged configurations.