The present disclosure pertains to ionic polymer compositions, including semi- and fully interpenetrating polymer networks, methods of making such ionic polymer compositions, articles made from such ionic polymer compositions, and methods of making such articles and packaging for such articles.

A system includes an interosseous coupler and a driver. The interosseous coupler includes a first anchor; a second anchor; and a tether extending between the first anchor and the second anchor. The driver is configured to couple to the first anchor and the second anchor and apply rotational force to the first anchor and the second anchor.

The present disclosure provides for a wrist arthroplasty system and method that enable an expedient surgical procedure, maintain wrist motion, and reduce the likelihood of implant loosening. The system includes a capitate implant, a radial implant, and a resection instrument. The capitate implant includes a convex head formed to interface with a concave socket of the radial implant. The capitate implant includes a single stem formed to be secured within a patient's capitate bone. The radial implant includes lips formed to increase wrist joint motion and to help prevent dislocation of the capitate implant from the radial implant. The resection instrument may be used in combination as a measurement tool for determining the proper implant size, a guide for properly positioning the implants, and a trial tool for testing trial implant components before securing the final radial and capitate implants.

Hard-tissue implants are provided that include a bulk implant, a face, pillars, slots, and at least one support member. The pillars are for contacting a hard tissue. The slots are to be occupied by the hard tissue. The at least one support member is for contacting the hard tissue. The hard-tissue implant has a Young's modulus of elasticity of at least 3 GPa, and has a ratio of the sum of (i) the volumes of the slots to (ii) the sum of the volumes of the pillars and the volumes of the slots of 0.40:1 to 0.90:1. Methods of making and using hard-tissue implants are also provided.

A method of implanting a joint prosthesis assembly for joint arthroplasty using a coupling mechanism is disclosed. The method includes exposing a joint of a patient, resecting a portion of the joint, inserting a second prosthesis of the joint prosthesis assembly into a medullary canal, and inserting a first prosthesis of the joint prosthesis assembly from a lateral side of the joint, The joint prosthesis assembly includes a magnet. The magnet is configured to lock the first prosthesis of the joint prosthesis a.ssembly to the second prosthesis of the joint prosthesis assembly. The first prosthesis of the joint prosthesis assembly includes a recess. The second prosthesis of the joint prosthesis assembly includes a protrusion. The recess is configured to house the protrusion. Alternatively, the first prosthesis and the second prosthesis may be assembled in a direct line using the magnet for secure coupling of the components.

The present disclosure pertains to ionic polymer compositions, including semi- and fully interpenetrating polymer networks, methods of making such ionic polymer compositions, articles made from such ionic polymer compositions, and methods of making such articles and packaging for such articles.

A surgical implant for total wrist replacement (TWR) includes a carpal portion and a radial portion to fully encompass both sides of the articulated joint defining wrist movement. The carpal portion is defined by a unitary structure that defines a fused form of the scaphoid, lunate and triquetrum, and bears against the radial portion for permitting articulated motion. The radial portion replaces a distal portion of the natural radius adjacent the wrist, and has the form of a “T” to combine a bearing surface with a stem adapted for implantation in the natural radius. The stem engages a receptacle or bore formed in a truncated end of the natural radius. Both the radial portion and the carpal portion patient-specific members are formed from image scans of the patient's own skeletal structures, and incorporate inverted, contralateral images of healthy structure based on an assessment of deformation in the replaced joint.

Hard-tissue implants are provided that include a bulk implant, a face, pillars, slots, and at least one support member. The pillars are for contacting a hard tissue. The slots are to be occupied by the hard tissue. The at least one support member is for contacting the hard tissue. The hard-tissue implant has a Young's modulus of elasticity of at least 3 GPa, and has a ratio of the sum of (i) the volumes of the slots to (ii) the sum of the volumes of the pillars and the volumes of the slots of 0.40:1 to 0.90:1. Methods of making and using hard-tissue implants are also provided.

An implant that couples a first bone and a second bone includes a body that defines a first joint surface, a second joint surface, and a median plane. The first joint surface includes a first central region that articulates with the first bone. The second joint surface includes a second central region that articulates with the second bone, and the second central region is disposed on an opposite side of the median plane of the body relative to the first central region. The first and second central regions correspond to profiles of first and second axial segments, respectively, the first and second axial segments are each one of a cylinder, a cone, and a torus and are centered on first and second axes, respectively, and the first and second axes, as projected on the median plane, are substantially perpendicular to each other. The first joint surface further defines a first peripheral region adjacent the first central region and the first axial segment has a first cross section that has a smaller curvature in the first central region of the first joint surface than in the first peripheral region of the first joint surface.

Hard-tissue implants are provided that include a bulk implant, a face, pillars, slots, and at least one support member. The pillars are for contacting a hard tissue. The slots are to be occupied by the hard tissue. The at least one support member is for contacting the hard tissue. The hard-tissue implant has a Young's modulus of elasticity of at least 3 GPa, and has a ratio of the sum of (i) the volumes of the slots to (ii) the sum of the volumes of the pillars and the volumes of the slots of 0.40:1 to 0.90:1. Methods of making and using hard-tissue implants are also provided.