This invention corresponds to a prosthesis for total or hip resurfacing replacement, which comprises a prosthetic femoral head made of highly cross-linked polyethylene, with a diameter ranging from 38 mm to 64 mm, to articulate with a cup or acetabular component made of metal. When the invention applies to total hip replacement, the polyethylene head includes a metal core, which contains inside the female counterpart (14) to mate with the male counterpart (13) of a Morse taper, located at the upper end of the femoral component. The use of this type of head for total hip replacement, articulated with an ultra-polished acetabular cup, reduces the risk of dislocation, transmits less angular and torque forces to the Morse taper than large metal heads, and avoids the problems related to the metal-metal bearing or with the use of large metal heads with thin polyethylene. When the invention relates to hip resurfacing replacement, the highly cross-linked polyethylene femoral head has a lower polyethylene extension or stem with or without internal metal reinforcement (151) or a metal stem integrated into a metal-back (152). Using these types of heads for hip resurfacing replacement heads eliminates the problems associated with metal-on-metal resurfacing replacements.

A spinal implant is provided that includes a body extending in direction at least substantially along a body axis, between a first end portion and a second end portion. The spinal implant also includes a first bearing surface disposed relative to the first end portion, and defining a first relief pattern that is configured to inhibit movement of the spinal implant relative to one or more vertebrae in at least substantially all directions. A method for manufacturing the spinal implant involves use of selective laser sintering.

The embodiments provide various interbody fusion spacers, or cages, for insertion between adjacent vertebrae. The cages may have integrated ratchet assemblies that allow the cage to change size and angle as needed, with little effort. The cages may have a first, insertion configuration characterized by a reduced size to facilitate insertion through a narrow access passage and into the intervertebral space. The cages may be inserted in a first, reduced size and then expanded to a second, larger size once implanted. In their second configuration, the cages are able to maintain the proper disc height and stabilize the spine by restoring sagittal balance and alignment. Additionally, the intervertebral cages are configured to be able to adjust the angle of lordosis, and can accommodate larger lordotic angles in their second, expanded configuration. Further, these cages may promote fusion to further enhance spine stability by immobilizing the adjacent vertebral bodies.

An improvised anthroplastic prosthetic implant having, in some embodiments, secondary screws with threaded shafts for forming pilot holes into the resected cancellous bone surface, such as the tibia, and primary screws with tapered heads for replacing the secondary screws and forming a Morse friction fit with the implant and seating the implant in close apposition to, and at less than 150 um in, resected bone thereby facilitating implant stability, wherein the heads of the primary screws are recessed into a counterbore in the baseplate to improve axial postoperative stability of the implant.

Implants, device, systems and methods for replacing an articulation surface in a joint, for example, a glenoid implant with an articular surface and an opposing bone contacting surface having a ring and post extending therefrom that respectively mechanically connect with cortical bone and cancellous bone of a glenoid. Methods for implanting the glenoid implant are also disclosed.

The present disclosure provides an iliac prosthesis, comprising: a prosthesis main body, the prosthesis main body including a first end portion contacted and matched with a sacrum and a second end portion contacted and matched with an acetabulum, a first screw hole being formed in the first end portion, a first screw seat being arranged in the first screw hole, the screw-rod structure including a connecting seat and a rod body, the connecting seat being connected with the prosthesis main body, and the rod body being fixed on the connecting seat; and an anti-dropping mechanism, the anti-dropping mechanism being arranged between the prosthesis main body and the connecting seat in a clamping manner. The technical solutions of the present disclosure can effectively solve the problems of unreliable supporting and easy fatigue break of the screw-rod system in the related technology.

An intervertebral implant for implantation in an intervertebral space between vertebrae. The implant includes a body extending from an upper surface to a lower surface. The body has a front end, a rear end and a pair of spaced apart first and second side walls extending between the front and rear walls such that an internal chamber is defined within the front and rear ends and the first and second walls. The body defines an outer perimeter and an inner perimeter extending about the internal chamber. At least one of the side walls is defined by an integral porous structure.

A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The anchor may include various features to enhance the fixation of the base, including hooks, threads, and/or expandable members that may be transitioned from a contracted insertion condition to an expanded implanted condition once the base is positioned in the bone. The anchor and/or collar may also include additional features to enhance fixation, such as geometries and surface features to enhance fixation to bone. The anchor may include a plurality of chisel slots to facilitate removal of bone during a revision surgery.

An arthrodesis implant (1) allowing promoting the bone fusion of two bones is provided, the 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), and a deformable portion (5) designed to ensure the anchoring of the implant (1) in a second bone. The deformable portion (5) comprises at least two anchoring arms (9, 10) which protrude beyond the anchoring body (4) from the base end (7) of the anchoring body (4), 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 the anchoring arms under the action of the second bone. 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 anchoring arm (9, 10).

A spinal fusion system comprising an interbody device includes a leading end, trailing end, and opposed bone contacting sides extending therebetween. The trailing end defines a threaded opening that extends toward the leading end. The system also includes a bone plate that includes inner and outer surfaces and defines a first bone screw opening and connection screw opening extending therethrough. The system further includes a connection screw that includes a head and a threaded shaft. The head is positioned within the connection screw opening of the bone plate and is rotatably connected thereto such that the connection screw is rotatable about a longitudinal axis thereof but is prohibited from translational movement relative to the bone plate. The threaded shaft extends from the connection screw opening and is configured for threaded engagement with the threaded opening of interbody device.