Arthrodesis device

An ankle arthrodesis device comprising a nail configured for implantation in a tibia, a talus and a calcaneus of a patient, the nail comprising:

• a proximal portion which generally extends according to a first longitudinal direction of extension;
• a distal portion which extends from the proximal portion and generally extends according to a second longitudinal direction of extension with respect to the first longitudinal direction of extension, the distal portion being provided with a first fastening orifice which is oblong according to the second longitudinal direction of extension;
• wherein the distal portion of the nail is adapted to extend through the calcaneus in an oblique configuration with respect to an axis of vertical extension of the tibia;
• the device comprising a first compressive fastening means, comprising a compressive screw, the nail being designed and configured so that, when the nail is implanted with said distal portion directed rearwards of the ankle of the patient, said first fastening orifice is arranged so as to receive and guide the first fastening means according to a first fastening direction which is adapted to extend through the talus and calcaneus so as to fasten the nail to the talus and the said calcaneus;
• wherein an oblong-shaped fastening orifice is configured to fasten the proximal portion of the nail to the tibia while keeping translational freedom of the nail within the tibia;
• wherein a third second fastening direction F3-F3′ is orthogonal with respect to a main plane, comprising one or more directions of extensions of the proximal and distal portions of the nail;
• the third second fastening direction F3-F3′ comprising a middle-lateral talar fastening direction;
• a longitudinal groove configured to block rotation of the nail about the first longitudinal direction of the extension, the longitudinal groove arranged symmetrically on either side of a main plane, thereby facilitating identification of an orientation of the main plane;
• wherein the extensions are inscribed within the main plane;
• a marker element comprising a notch formed in the nail at a level of a free distal end;
• and
• an instrument comprising a removable and tubular interface that sets the nail in place using a plantar approach, the instrument configured to be removably coupled to a distal end of the nail.