Methods and apparatus for providing correction of one or more maladies or conditions of the spinal column of a living being. In one embodiment, the apparatus includes an implantable device configured to be selectively adjustable in one or more portions thereof so as to permit correction of asymmetries or irregularities of the spinal column via insertion into one or more affected intervertebral disc spaces. In one variant, the implantable device includes upper and lower host elements which are hinged or can pivot relative to one another, and an insertable distraction mechanism which is adjustable to enable one side or the other of the implantable device to alter height. In another variant, both sides of the implantable device can be adjusted for height via the host elements and one or more pivots or hinges. In one implementation, the distraction mechanism is adjustable from multiple approaches into the disc space.

An expandable implant includes an upper main support of bone, a lower main support coupled to the upper main support, the lower main support comprising a first coupling feature and a second coupling feature being substantially parallel to the first coupling feature, and a control assembly configured to control relative movement between the upper main support and the lower main support, the control assembly including a first control member configured to engage the upper main support and the lower main support and interface with the first coupling feature a second control member configured to engage the upper main support and the lower main support and interface with the second coupling feature, and a control shaft configured to be received by the first control member and the second control member, wherein manipulation of the control shaft causes relative movement between the upper main support and the lower main support.

A prosthetic total knee replacement system comprises a distal femoral implant component, a tibial tray implant component and a fixed bearing tibial tray insert. The fixed bearing tibial tray insert is fixed to the tibial tray and articulates with the distal femoral implant component. The fixed bearing tibial tray insert component has a medial-lateral centerline and a stabilizing post. The stabilizing post has a medial-lateral centerline offset laterally from the medial-lateral centerline of the fixed bearing tibial tray insert.

Disclosed are systems, devices, methods and surgical procedures for altering and/or correcting the alignment of adjacent bones, including bones of the spine.

A prosthesis including a subacromial spacer having a surface contoured to maintain an acromion in chosen distance to a humeral head upon rotation and fixation means to fixate the subacromial spacer to a humeral medullary cavity and/or an intramedullary fixator implanted or configured for implantation in the humeral medullary cavity. A surgical kit includes the prosthesis and a proximal humeral nail. The fixating means are connectable into a proximal opening of the proximal humeral nail. A method may include: creating a percutaneous passage from an outer-body space to a portion of a humeral head; removing bony tissue to facilitate direct communication between the outer-body space and a humeral medullary cavity enclosed in the humeral head; providing a prosthesis including a subacromial spacer having a surface; and/or fixating the subacromial spacer to the humeral medullary cavity and/or an intramedullary fixator implanted or configured for implantation in the humeral medullary cavity.

The present invention discloses a combined semi-limiting multipolar artificial wrist joint, or semi-limiting bipolar artificial wrist joint, and be selected and assembled based on the specific pathological conditions of wrist bone destruction. For instance, the metacarpal bone articular surface is shown to be complete and the bone quality is good, and most of the far carpal bones (including small polyangular bones and head bones) can be preserved, while the proximal carpal bones (scaphoid and lunate) and the articular surface of the carpal radius are broken, and the proximal carpal bones are to be excised. The artificial wrist joint can also be assembled in another way, which is called semi-limiting multipolar artificial wrist joint, wherein the pathologically damaged double carpal bones are excised to form an inter-matching assembly of palm, wrist and radius joints.

An expandable spinal implant is provided having first and second endplates hinged along one end or otherwise connected by pins, protrusions and channels, or similar mechanisms and an expansion mechanism(s) disposed therebetween configured to expand the first and second endplates from each other. Also provided are expandable spinal implants that may be expanded in a parallel manner to increase the height of the device while maintaining a lordotic angle. Other spinal implants may provide dual expansion whereby both height and lordotic angle are adjusted. Various implants, systems and methods are disclosed.

An arthroplasty system may include a first prosthesis to be fixed to a first bone of a joint, a second prosthesis to be fixed to a second bone of the joint for articulation with the first prosthesis, and one or more adapters to be fixed to the first prosthesis for articulation with the second prosthesis to modify the stability of the second prosthesis relative to the first prosthesis. The system may include one or more articular inserts to be coupled to the second prosthesis for articulation with the first prosthesis and/or the adapter(s). The articular inserts may be fixed or mobile bearing relative to the second prosthesis. Each adapter and corresponding articular insert may modify stability differently.

A joint replacement device includes a male component with a structure to couple to a bone on one side of a joint, and an outer articulation surface that is attached to the structure via a neck. A female component is configured to couple to a bone on an opposite side of the joint and includes a cavity that is surrounded by an inner articulation surface. An opening of the cavity is shaped to enable insertion of the outer articulation surface into the cavity when the outer articulation surface is aligned with the opening, and to prevent separation of the male component from the female component when rotated so as not to align with the opening. The neck is located within the opening and the outer articulation surface is rotatable within the outer articulation surface with a rotation that is limited by dimensions of the opening and the neck.

An approach is provided for a three-dimensional (3D) printing method for forming a 3D object. The approach provides for printing a structure of the 3D object by depositing a thermoplastic material, in which the thermoplastic material is radiolucent. The approach provides for printing one or more radio-opaque markers by depositing another material, which includes at least a radio-opaque material. The approach integrates the one or more radio-opaque markers with the structure of the 3D object.