Calcaneal prosthesis

A calcaneal prosthesis for use during a calcaneal replacement surgery comprising:

• a unitary body configured so as to be in the shape of a calcaneus bone having a dorsal surface, an anterior surface, and a posterior end, the unitary body having (i) an integral intramedullary (IM) nail protruding from the dorsal surface having a stop so as to prevent the IM nail from moving toward a portion of the patient's tibia when pressure is applied to a portion of the patient's foot and (ii) defining a dorsal opening that communicates with at least one of a lateral side opening and a medial side opening of the unitary body so as to receive a wire to facilitate a fixation while preserving surrounding soft tissue;
• the posterior end of the unitary body includes a tuberosity;
• the anterior surface defining a concavity that is shaped for receiving a mid-foot bone;
• and
• the dorsal surface including an extended plantar-dorsal surface suitable for engaging at least one of a talus and a distal tibia.

A method, comprising:

• collecting image data defining a first three-dimensional model of a first calcaneus of a patient;
• forming a second three-dimensional model of a second calcaneus by computing a mirror image of the first three-dimensional model about a sagittal plane;
• and
• fabricating a calcaneal replacement prosthesis having a unitary body configured so as to be in the shape of a calcaneus bone including a posterior end that forms a calaneal tuberosity and defining a dorsal opening that communicates with at least one of a lateral side and a medial side of the unitary body, an anterior surface defining a concavity that is shaped to form a surface that is suitable for articulating motion with respect to a mid-foot bone, a dorsal surface defining a convex surface suitable for engaging at least one of a talus bone, and an integral intramedullary (IM) nail protruding from the dorsal surface having a stop so as to prevent the IM nail from moving toward a portion of the patient's tibia when pressure is applied to a portion of the patient's foot.

A calcaneal prosthesis for implantation into a patient during a calcaneal replacement surgery, comprising:

• a unitary body configured so as to be in the shape of a calcaneus bone having a posterior end that forms a calcaneal tuberosity and defining a dorsal opening that communicates with at least one of a lateral side and a medial side of the unitary body;
• an anterior surface defining a concavity suitable to receive articulating movement of a mid-foot bone;
• a dorsal surface defining a convex surface suitable for engaging at least one of a talus and a tibia;
• and
• an integral intramedullary (IM) nail protruding from the dorsal surface having a stop so as to prevent the IM nail from moving toward a portion of the patient's tibia when pressure is applied to a portion of the patient's foot.