A spinal interbody device (IBD) includes a solid wall that at least partially defines a boundary of the IBD and a porous body connected to the solid wall. The porous body includes a plurality of sections that form at least a portion of both a superior and inferior bone interface side of the IBD. Each section of the porous body has a different porosity than an adjacent section such that the porosities increase toward a center of the IBD.

An acetabular hip implant and method includes an acetabular shell component having a first feature and a first insert having a second feature that cooperates with the first feature of the acetabular shell component and further includes a third feature. The implant further includes a second insert having a fourth feature that cooperates with the third feature of the first insert and further includes a fifth feature. A femoral head component includes a sixth feature that cooperates with the fifth feature. Interaction between the first and second features, between the third and fourth features, and between the fifth and sixth features mechanically constrains the acetabular hip implant to prevent dislocation of the femoral head during rotation.

A spinal interbody device (IBD) includes a solid wall that at least partially defines a boundary of the IBD and a porous body connected to the solid wall. The porous body includes a plurality of sections that form at least a portion of both a superior and inferior bone interface side of the IBD. Each section of the porous body has a different porosity than an adjacent section such that the porosities increase toward a center of the IBD.

An acetabular implant for a hip prosthesis including: a fixation cup defining an inner cavity having a substantially hemispherical shape, made of polyethylene and having, on its outer wall, means capable of favoring its fixation with cement within the acetabular cavity of the pelvis of the patient to be prosthesized, the inner cavity being coated with an armoring made of a biocompatible material of high hardness, said armoring defining the smooth inner cavity of substantially hemispherical shape intended to receive the mobile insert; an insert, mobile within said inner cavity and having its smooth outer surface intended to cooperate by ball and socket joint with the inner cavity of the fixation cup, and defining in turn a smooth inner cavity also having a substantially hemispherical shape; said mobile insert being made of high-density polyethylene; a prosthetic femoral head or prosthetic ball, secured to a femoral stem, of spherical shape and intended to be received in the inner cavity of the mobile insert and to form a second ball and socket joint.

A load dissipating arthroplasty prosthesis comprising a shell, an articular device extending into the shell through a collar defined in the sell, a head and neck portion of the articular device extending from the collar, a shaft portion of the articular device extending into the shell, and a plurality of shock absorbing arcuate linkers spacing and allowing limited movement between the shell and the articular device.

An acetabular hip implant includes a plurality of rings secured to an acetabular shell component. A method of fabricating a customized, patient-specific version of such an implant is also disclosed.

Multi-hooded enarthrodial joint implant has a ceramic articulating cup including a ceramic head-receiving cup having an articular surface upon which a head of a joint can articulate, and which, in general, has a margin generally about a hemisphere more or less and at least two hoods that are marginally extended continuations of superior one-half or so of cup containment of a sufficient magnitude to reduce an overall dimension of socket outlet to less than a hemisphere, which can embrace and contain the head. The head is made of ceramic and has a truncated generally circular cross section, a truncated surface with a feature for attachment of the stem, and an opposing articular surface for articulation against the articular surface of the ceramic head-receiving cup. As an ensemble, the cup is combined with the head, typically with a stem, for a total joint implant.

Described is an acetabular assembly comprising: an acetabular cup component (100) having an outer convex surface (104), an inner concave surface (106) defining a cup cavity, and a plurality of openings (116) that extend between the inner concave surface and the outer convex surface and that are configured to accommodate a fastener for attaching the acetabular cup component to an acetabulum of a patient; an insert bearing liner (200) defined by an inner concave surface (202) and an outer convex surface (206), and configured to be located at least partially within die cup cavity of the acetabular cup component; and a plurality of spacers (300) that are configured to be inserted into the plurality of openings in the acetabular cup component from the inner concave surface.

A spinal interbody device (IBD) includes a solid wall that at least partially defines a boundary of the IBD and a porous body connected to the solid wall. The porous body includes a plurality of sections that form at least a portion of both a superior and inferior bone interface side of the IBD. Each section of the porous body has a different porosity than an adjacent section such that the porosities increase toward a center of the IBD.

A spinal interbody device (IBD) includes a solid wall that at least partially defines a boundary of the IBD and a porous body connected to the solid wall. The porous body includes a plurality of sections that form at least a portion of both a superior and inferior bone interface side of the IBD. Each section of the porous body has a different porosity than an adjacent section such that the porosities increase toward a center of the IBD.