Abstract: An intramedullary support for arthrodesis of a human midfoot, especially to correct Charcot deformity, is configured as an elongated beam or shaft having porous metal on an outer surface for bone ingrowth. For the medial column, the intramedullary support is emplaced in a K-wire guided bore extending through the metatarsal, cuneiform, and navicular bones into the talus. The beam or shaft can be polygonal in cross section and the porous metal can included particulate or trabecular metal arranged in discrete areas or along splines, such as titanium with a porosity comparable to that of cancellous bone. Splines or encircling lengths of porous metal can be flush or protruding from the surface of the beam or shaft, longitudinal along a cylindrical the beam, or oblique or wrapped helically, or on a beam of polygonal cross section. Bone ingrowth and ossification supports the medial column in alignment along the beam.

Abstract: An ankle arthrodesis fusion plate is provided that affords compression across the tibio-talar joint to promote bone fusion and joint stability.

Abstract: An implant is disclosed including an elongate threaded portion and a blade extending from the elongate threaded portion. The blade having a taper terminating at a point and a biasable cantilever formed in a central portion of said blade and with a free end that protrudes from at least one surfaces when the cantilever is unbiased.

Abstract: A condition settable combination gas cylinder and electric switch, the switch being mounted on the extended piston rod of the cylinder. The switch has an internal retainer within the switch housing and engageable by the cylinder housing in the first compression stroke of the cylinder, to shift the retainer and two electrical contacts thereon to a set position exactly suiting the cumulative buildout tolerance of the vehicle or other machine on which the novel combination is mounted. The retainer is locked there against reverse movement when the cylinder again extends and thereby withdraws from the switch. Another electrical contact is located on a switch plunger that moves axially back and forth with the retainer and switch housing. Thus, each repeat extension by the cylinder causes interengagement of the three electrical contacts.