A trapeziometacarpal joint implant includes a body defining a median plane, a metacarpal joint surface, and a trapezium joint surface. A first central region of the metacarpal joint surface is situated on an opposite side of the median plane from a second central region of the trapezium joint surface. The first and second central regions correspond to profiles of a first axial segment and a second axial segment, respectively. The first and second axial segments are one of a cylinder, a cone and a torus and are centered on a first axis and a second axis, respectively, where the first and second axes, as projected on the median plane, are substantially perpendicular to each other.

A device is provided including a distal nail portion and a proximal nail portion that can be connected to each other to attain a rigid configuration. The device is to be placed internally within the medullary cavities of bones. The device is placed intramedullarily in order to minimize incision size, excessive bone resection and post-operative tendon damage and tenderness. Additionally, one particular method for using the device is provided that includes placing and affixing the distal nail in bone, placing the proximal nail in bone, connecting the distal nail to the proximal nail, doing the desired geometrical adjustments, affixing the proximal nail to the distal nail by tightening the connection and affixing the proximal nail to attain a rigid configuration.

A device for repairing Hallux Valgus (HV) is disclosed comprising a first arm adapted to be affixed inside the canal of the first metatarsus (1MT) of a human foot, a second arm adapted to be affixed inside the canal of the second metatarsus (2MT) of a human foot and a spring mechanism connected between the first arm and the second arm, active to push the 1MT closer to the 2MT. The device may comprise fixating means adapted to fixate said first arm inside said MT and said second arm inside said 2MT and the spring mechanism is removable from the first and the second arms.

For a membrane encapsulated joint implant sealed under vacuum, a joint implant includes an outer cup, an inner cup, a joint head, a joint membrane, a lubricant, and an implant stem. The outer cup attached at a proximal bone. The nests within the outer cup and receives a joint head, the inner cup comprising an inner cup rim. The joint head is disposed within the inner cup and forms a bearing that rotates within the inner cup. The joint membrane sealed to the inner cup rim and vacuum seals the joint head within the inner cup to form a capsular space. The lubricant is disposed within the capsular space. The implant stem that is attached to a distal bone and that attaches through the joint head through the joint membrane.

A subtalar joint prosthesis that is adapted to replace the natural subtalar joint that exists between a patient's talus and calcaneus bones includes talar and calcaneal components. Each of these is configured to have a shape that is herein defined as being a portion of the boundary surface of a frustum. Meanwhile, these components' inner surfaces are configured to: (a) generally follow the anatomic contour of the original joint surface to which each component is to be attached, and (b) minimize each components's average thickness, consistent with providing sufficient strength and rigidity for the components, so as to require minimum bone resection for the implantation of these components.

A subtalar joint implant (20) is disclosed for replacing a natural subtalar joint existing between the talus (102) and calcaneum (104) bones of a patient. In an embodiment the implant comprises talar (22) and calcaneal (24) portions that are configured to slide over each other in the implanted state. The implant is shaped so that the sliding is constrained to trajectories that involve pivoting of the talar portion relative to the calcaneal portion about a pivot point (36) or a line (38) of pivot points.

A prosthesis includes a first and second plate; elements for mounting the plates to pivot about an axis, which include a flexible hinge including a cylindrical plane flexible strip with two cylindrical swellings respectively associated with two edges of the strip, the dimension of the cross-sections of the swellings, taken in a direction perpendicular to the plane containing the pivot axis and passing through the swellings, being greater than the thickness of the strip taken in the same direction, a hole in each plate of shape complementary to the swellings and opening out in a first face of the corresponding plate; a slot made in each plate and opening out into the hole of that plate, in a second of its faces, and in the first face, the hinge and plates being mounted to so that the swellings and the strip are situated respectively in the two holes and slots.

A joint prosthesis system is suitable for cementless fixation. The system has two metal implant components and a bearing. One of the metal implant components has an articulation surface for articulation with the bearing. The other metal implant component has a mounting surface for supporting the bearing. One of the metal implant components includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.

The invention concerns an arthrodesis implant (1) allowing promoting the bone fusion of two bones, said implant (1) comprising: a rigid and non-deformable anchoring body (4), designed to ensure the anchoring of the implant (1) in a first bone (2), a deformable portion (5) designed to ensure the anchoring of the implant (1) in a second bone, said deformable portion (5) comprising at least two anchoring arms (9, 10) which protrude beyond the anchoring body (4) from the base end (7) of the latter, the anchoring arms (9, 10) being separated from each other by a free space (E) so as to be able to be brought closer to each other by deformation of said anchoring arms under the action of the second bone. and being characterized in that at least one of the anchoring arms (9, 10) is provided with a longitudinal reinforcing fin protruding beyond the anchoring arm (9, 10) from a lateral side (20) of the latter. Osteosynthesis surgical implants.

An implant customization platform may receive image data associated with a bone of a patient. The implant customization platform may convert the image data to a structural representation of the bone. The implant customization platform may identify, based on the structural representation, a placement for an orthopaedic implant relative to the bone. The implant customization platform may determine a performance characteristic for a combination of the bone and the orthopaedic implant. The implant customization platform may determine, using an implant customization model, a data representation of the orthopaedic implant based on the structural representation, the placement, and the performance characteristic. The implant customization platform may perform an action associated with the data representation to permit the orthopaedic implant to be formed.