Conventional Lisfranc/Chopart prosthetics employ a semi-rigid, relatively flat prosthetic keel that is glued to the bottom of the socket. The resulting butt joint is relatively weak since it relies solely upon the glue to hold it together. To increase the strength of such a butt joint, the surface area must be increased up to 50% keel OAL. Such a relatively large, rigid connection detrimentally reduces the flexibility of the foot as well as increases bulk, making it more difficult to wear and fit into a standard shoe or sneaker.

DYCOR’S new ADL Lisfranc/Chopart Dynamic Response Foot (L5981) maximizes flexibility by limiting the attachment portion of the keel to the posterior 25% OAL. Unidirectional carbon fiber integral with the keel is epoxied directly to the socket, forming a permanent lap joint. The socket frame acts as an orthotic inside caliper, and along with the keel attachment, is contained within the shoe counter area.

Keel flexibility is further enhanced by proprietary (1) monolithic “leaf spring” construction. The standard LCD foot has three composite leaf springs, and the “F” series (FLCD) has four leafs, making it 33% more flexible. The average weight is 6 oz. (2), and can be specified with or without Dycor’s patented integrated EVA foot shell. Introductory price is $480.00 including shell. Dycor’s ADL /LCD feet can also be purchased as a finished prosthesis through Dycor’s CFS Dept.