The embodiments provide various interbody fusion spacers, or cages, for insertion between adjacent vertebrae. The cages may contain an articulating mechanism to allow expansion and angular adjustment, and enable upper and lower plate components to glide smoothly relative to one another. The cages may have a first, insertion configuration characterized by a reduced size at each of their insertion ends to facilitate insertion through a narrow access passage and into the intervertebral space. In their second, expanded configuration, the cages are able to maintain the proper disc height and stabilize the spine by restoring sagittal balance and alignment. The intervertebral cages are able to adjust the angle of lordosis, and can accommodate larger lodortic angles in their second, expanded configuration. Further, these cages may promote fusion to further enhance spine stability by immobilizing the adjacent vertebral bodies.

A biodegradable joint implant comprises a joint scaffold and a film layer coated on the surface of the joint scaffold. The joint scaffold comprises a first anchor fixing, a second fixing and a flexible spacer, and the first anchor fixing and the second anchor fixing are respectively axially connected to opposite sides of the flexible spacer. The joint implant is made of biodegradable material, and the film layer contains at least one substance that can induce tissue growth. A method for preparing the joint implant and a joint replacement method using the joint implant are also provided.

An interbody fusion device includes a base member, a top member, and an expansion mechanism for moving the top member relative to the base member. The expansion mechanism may include a connector drive rod assembly, a gear, a threaded rod, and a support means. The gear ring is coupled to the threaded rod and is rotatable. The expansion mechanism may also include at least one load head coupled to the threaded rod. An alternative interbody fusion device is also disclosed and includes a bottom member, a superior member, and an expansion mechanism for moving the superior member relative to the base member, wherein the expansion mechanism comprises at least one expansion assembly for moving an end of the superior member relative to the bottom member.

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

An expandable spinal implant is provided having first and second endplates hinged along one end and an expansion mechanism disposed therebetween configured to expand the first and second endplates from each other to provide a lordotic angle of up to 60 degrees. Various implants, systems and methods are disclosed.

An implantable joint prosthesis simulating an elbow joint, an ankle joint, a shoulder joint or a hip joint, the implantable prosthesis having one or more integrated biasing system(s) configured to bias the prosthetic joint to one or more preferred orientations or alignments.

A muscle-driven endoprosthesis system may include a bone extension, an intramedullary stem extending form a first end of the bone extension, a joint at a second end of the bone extension, a moveable portion coupled to the hinge, and synthetic tendons coupled to the moveable portion. The bone extension, intramedullary stem, hinge, and movable portion are sized and shaped to fit within a skin of a patient.

The embodiments provide various interbody fusion spacers, or cages, for insertion between adjacent vertebrae. The cages may contain an articulating joint to allow expansion and angular adjustment, and enable upper and lower plate components to move relative to one another. The cages may have a first, insertion configuration characterized by a reduced size at each of their insertion ends to facilitate insertion through a narrow access passage and into the intervertebral space. In their second, expanded configuration, the cages are able to maintain the proper disc height and stabilize the spine by restoring sagittal balance and alignment. The intervertebral cages are able to adjust the angle of lordosis, and can accommodate larger lodortic angles in their second, expanded configuration. Further, these cages may promote fusion to further enhance spine stability by immobilizing the adjacent vertebral bodies.

Orthopedic implants, systems, instruments, and methods. A bi-portal lumbar interbody fusion system may include an expandable interbody implant and minimally invasive pedicle-based intradiscal fixation implants. The interbody and intradiscal implants may be installed with intelligent instrumentation capable of repeatably providing precision placement of the implants. The bi-portal system may be robotically-enabled to guide the instruments and implants along desired access trajectories to the surgical area.

Disclosed are devices, system and methods for spinal implants to be deployed into an intervertebral space between adjacent vertebrae to replace the function of the intervertebral disc and the facets, while restoring stability, flexibility, coronal alignment/balance, sagittal alignment/balance and proper biomechanical motion.