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  • Foot implants designed for stabilization of the subtalar joint; blocking forward, downward and medial displacement of the talus thus allowing normal motion of the joint. These implants are available in plastic (e.g., high weight polyethylene), biologic materials (i.e., allograft) or metals (e.g., titanium). Subtarsal implants can be various shapes, such as angled discs (that may be cemented) placed on the surface of the calcaneus; domes that are placed in a hole in the dorsal surface of the calcaneus; wedges for medial cuneiform opening wedge osteotomies and calcaneal osteotomies; and conic implants placed and threaded in the space between the calcaneus and talus (i.e., sinus tarsi). Temporary implants (also known as endorthosis) that are usually threaded in the sinus tarsi and that consist of a combination of titanium and polyethylene intended for removal after joint stabilization are also available. Subtarsal foot implants are used in a variety of orthopedic treatments, including subtalar instability, flat foot, deformities associated to tibial tendon dysfunction, and severe pronation.
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