To provide a sliding member having improved wear resistance, and a method of manufacturing the sliding member. A femoral head ball according to an aspect of the present disclosure includes a composite ceramic containing alumina and at least one oxide other than alumina. A surface roughness Ra of the sliding surface when the femoral head ball slides against a constituent member constituting an artificial joint is not more than 0.01 μm. The sliding surface includes a plurality of recessed portions each having an opening diameter of not more than 2 μm.

A posterior cruciate ligament retaining knee implant prosthesis comprising a femoral component including a medial condyle and a lateral condyle separated from one another by an intercondylar channel adapted to accommodate throughput of a native cruciate ligament, both the medial condyle and the lateral condyle posteriorly terminate individually, the medial condyle including a medial condyle bearing surface and the lateral condyle including a lateral condyle bearing surface, the femoral component including an anterior cam, and a tibial component including a medial condyle receiver having a medial condyle receiver bearing surface, the tibial component also including a lateral condyle receiver having a lateral condyle receiver bearing surface, the tibial component also including an anterior post.

The present invention relates to an expandable implant for engagement between vertebrae generally comprising an inner member, outer member, and gear member positioned coaxial with respect to each other such that the inner and outer members are moveable relative to each other along an axis. The gear member is axially fixed to the outer member and freely rotatable with respect to the outer member and the gear member threadedly engages a threaded portion of the inner member to translate inner member along the axis. The implant is configured to engage the vertebrae in a predetermined alignment and the gear member includes gear teeth exposed to the exterior and configured to be accessible by a tool member at a plurality of angular positions around the perimeter of the implant device.

A selectively expanding spine cage has a minimized cross section in its unexpanded state that is smaller than the diameter of the neuroforamen through which it passes in the distracted spine. The cage conformably engages between the endplates of the adjacent vertebrae to effectively distract the anterior disc space, stabilize the motion segments and eliminate pathologic spine motion. Expanding selectively (anteriorly, along the vertical axis of the spine) rather than uniformly, the cage height increases and holds the vertebrae with fixation forces greater than adjacent bone and soft tissue failure forces in natural lordosis. Stability is thus achieved immediately, enabling patient function by eliminating painful motion. The cage shape intends to rest proximate to the anterior column cortices securing the desired spread and fixation, allowing for bone graft in, around, and through the implant for arthrodesis whereas for arthroplasty it fixes to endpoints but cushions the spine naturally.

Disclosed is an intervertebral cage for arthrodesis, where at least part of an upper and/or lower contact zone is made of a porous titanium material with a thickness of at least 1 mm and with a porosity of between 50% and 90%, where the diameter of the pores (DP) is between 200 μm and 1 mm, and where the pores have an aperiodic distribution.

An orthopaedic implant includes: a base including a molding material; a first porous ingrowth material region coupled to the base; a second porous ingrowth material region coupled to the base; and at least one barrier insert coupled to the base, the barrier insert including a barrier material that is configured to prevent introduction of the molding material of the base into some pores of the first porous ingrowth material region and some pores of the second porous ingrowth material region during molding of the base.

A knee prosthesis kit includes an implant and an augment. The implant has a base and a stem extending from the base, and the augment has a base and a conical, cylindrical, or anatomic portion extending from the base. The augment base has at least two openings for receiving fasteners for securing the knee augment to the implant. The portion and the base define a bore for receipt of the implant post. A coupler includes a mating portion for receipt in a bore of an implant post, and a cone-shaped portion extending from the mating portion. A method of providing fixation of knee implants includes securing an augment to an implant and positioning a conical, cylindrical, or anatomic portion of the augment within the intramedullary canal of the tibia or femur.

The present invention discloses a connected structure of a porous surface structure and a substrate, a method for preparing the same, and a prosthesis of the same. The connected structure consists of a pre-connected or integrally formed composite body of a porous surface structure and an intermediate; and a substrate, which is connected to said intermediate to achieve the connection of said composite body to the said substrate; the composite body comprising a first composite region corresponding to a first stiffness; a remaining composite region in the composite body other than the first composite region, which at least contains a second composite region corresponding to a second stiffness; and the first stiffness is less than the second stiffness. The present invention achieves a fastened connection between the composite and the substrate and largely maintains the mechanical properties of the substrate; and it provides a prosthesis with excellent bone ingrowth properties and that the strength of the substrate is not substantially affected.

Disclosed are system and methods that use at least one non-threaded anchor and an implant with at least one aperture to join boney structures, where the interaction of the head of the anchor with the implant aperture causes the anchor to move transversely with respect to an initial trajectory. This movement causes compression or distraction of the boney structures which are coupled to the anchors.

A method is disclosed for creating a patient-specific orthopedic implant. The method includes creating a numerical representation of an orthopedic implant design based on patient data describing an anatomical, physiological and pathological condition of a patient and simulating a characteristic of the orthopedic implant design based on the numerical representation. The method further includes selecting a patient-specific orthopedic implant design based on the simulated characteristic of the orthopedic implant design and the patient data and constructing at least one patient-specific orthopedic implant based on the selected patient-specific orthopedic implant design.