An interbody spacer for the spine is provided. The interbody spacer includes a cage and at least one bone screw configured to anchor the cage between two vertebrae of the spine. The cage includes a lock rotationally movable with respect to the cage between a locked configuration and an unlocked configuration. When in an unlocked configuration, bone screws may be inserted and removed from the cage. When in a locked configuration, the insertion and removal pathway of the bone screw is blocked by the lock, thereby, providing backout protection for the bone screws. The lock is coupled to the cage by a pronged retainer and includes a camming surface to provide for incremental rotation of the lock. The lock includes a space-saving shape providing for maximum bone screw angulation on a laterally smaller anterior platform.

Implant assemblies for reverse shoulder arthroplasty are disclosed. In one embodiment, the implant assembly comprises a humeral component, an adaptor fixed to the neck of the humeral component, and a glenosphere bearing component coupled to the adaptor. The glenosphere bearing component comprises a first bearing surface that interfaces with an articulating surface of the adaptor to allow the adaptor to rotate relative to the adaptor and humeral component. The adaptor and the glenosphere bearing component form a locking mechanism that prevents the adaptor from decoupling from the glenosphere bearing component while allowing the adaptor to remain rotatable relative to the glenosphere bearing component after the implant assembly is implanted in the patient The second bearing surface is configured to interface with a glenosphere component to allow the glenosphere bearing component to articulate relative to the glenosphere component.

Methods and apparatus provide for an orthopedic device, including: a base element having a plurality of apertures extending therethrough for receiving a respective bone fixation element; a retaining mechanism operating to prevent withdrawal of the fixation element; and a blocker operating to overlie the bone fixation element within the one of the apertures such that the bone fixation element is prevented from withdrawing from one or more bones of the patient.

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.

An interbody spinal fusion cage for posterior interbody fusion procedures includes a superior member and an inferior member connected to each other via a joint. The joint allows the interbody spinal fusion cage to achieve lordosis even if implanted non-orthogonal to the sagittal plane. For example, the joint can be a hinge oriented non-normal to a longitudinal axis of the interbody spinal fusion cage, a polyaxial ball joint, and/or a universal joint. Complementary locking mechanisms, such as locking teeth or a ratchet-and-pawl arrangement, can be provided near the posterior ends of the superior and inferior members in order to prohibit the posterior ends of the superior and inferior members from separating from each other in situ. Bone holes can be provided in the superior and inferior members.

The glenoid implant comprises a baseplate, an articular component which has a convex articular surface, and a platform which is provided both to be secured to the articular component by a first attachment and to be secured to the baseplate by a second attachment, the first attachment being independent from the second attachment and defining an assembly axis along which the platform and the articular component are assembled together. The first attachment comprises both a translational connection that is intraoperatively operable to prevent translation between the platform and the articular component along the assembly axis, and a rotational connection that is intraoperatively operable to prevent rotation between the platform and the articular component around the assembly axis, the translational connection and the rotational connection being distinct from each other. The glenoid implant allows assembling the platform indifferently with one of various articular components which differ from each other for example by their material composition and/or by some geometric features of their convex articular surface and/or etc. The articular component that is effectively assembled with the platform can be chosen by the surgeon during surgery, i.e. during an implantation operation or just before the latter.

The present invention discloses a bionic artificial interphalangeal joint. The bionic artificial interphalangeal joint includes three sets of proximal prostheses and distal prostheses matched with the proximal prostheses and respectively corresponding to the three joints from the metacarpal bone to the distal phalanx. According to the specific position of the joint to be replaced, the corresponding artificial interphalangeal joint can be selected for replacement. Among them, the bionic artificial interphalangeal joint that can be installed between the metacarpal bone and the proximal phalanx has multiple degrees of freedom, which allows the proximal phalanx to bent in any direction like a real finger, and the bending angle of the proximal phalanx can be up to about 90 degrees when the proximal phalanx is bent toward the inner side of the finger.

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.

The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. In an exemplary embodiment, the present invention provides an intervertebral implant. The intervertebral implant may be configured to transition from a collapsed configuration having a first height and a first width to an expanded configuration having a second height and a second width.