A glenosphere includes a body and a flange. The body includes a first body surface and a spherical second body surface, and includes an engagement feature to engage with an attachment structure attachable to a bone. The flange extends radially outward from the body and includes a first flange surface contiguous with a first body surface and a second flange surface contiguous with the second body surface. The flange has a flange length extending from a first end and a second end such that an angle defined by a first line from a center of the body to the first end and a second line from the center of the body to the second end is less than 180 degrees.

An intervertebral disc includes a superior endplate having an upper vertebral contacting surface and a lower bearing surface, wherein the upper vertebral contacting surface of the superior endplate has a central portion that is raised relative to a peripheral portion of the superior endplate, and wherein the lower bearing surface has a concavity disposed opposite the raised central portion. The disc includes an inferior endplate having a lower vertebral contacting surface and an upper surface, wherein the lower vertebral contacting surface of the inferior endplate has a central portion and wherein the upper bearing surface has a concavity disposed opposite the central portion. A core is positioned between the upper and inferior endplates, the core having upper and lower core bearing surfaces configured to mate with the bearing surfaces of the upper and inferior endplates. The upper vertebral contacting surface of the superior end plate has a different shape than the lower vertebral contacting surface of the inferior end plate.

An inverse shoulder prosthesis includes a glenoid implant and a humerus implant. The glenoid implant has a glenoid body with a convex dome shaped articulating surface. The articulating surface extends along a center axis, has specific radii in sagittal and frontal planes, and is oriented towards the humerus. The humerus implant has a humeral body and a concave inlay. The concave inlay has a center axis oriented towards the glenoid of a shoulder and has a specific inner radius. The second radius of the glenoid implant is proportionately smaller than the inner radius of the inlay, ensuring a precise fit and function. This configuration allows for improved joint mechanics and stability.

The present disclosure relates to an implant (100) for orthopedic stabilization. The implant (100) facilitates partial mobility between a pair of bones of a joint. The implant includes a first plate (10) on operative portion of first bone of the joint, a stem (15) extending from operative surface of first plate (10), a ball (42) formed on operative end of stem (15). A second plate (20) mounted on operative portion of second bone of the joint. The first cavity (44) configured on operative surface of second plate (20). An interconnecting plate (30) mounted on operative portion of second plate (20). The second cavity (45) configured on operative portion of interconnecting plate (30). A recess is formed by attaching second plate (20) and interconnecting plate (30). The recess configured to receive ball (42) therein facilitates partial mobility between the pair of bones in operative configuration of implant (100).

Hip arthroplasty trial systems and associated medical devices, methods, and kits are described that can be utilized in situ to complete a femoral head trial. An example embodiment of a hip arthroplasty trial system includes a medical device and a femoral stem. The medical device has a head member, a spacer, a shaft, and a locking member. The spacer is disposed within the head member and is moveable from a first position to a second position. The shaft is disposed within the head member and contacts the femoral stem. The shaft is moveable from a first position to a second position. Movement of the shaft from the first position to the second position moves the spacer from its first position to its second position. The locking member is disposed within the head member and releasably attaches the shaft to the head member.