An ankle prosthesis comprising a tibial implant, a talar implant and an insert to articulate the implants. The top face of the tibial implant having an anchoring fin, and the bottom face is articulated with the top surface of the insert. The bottom face of the talar implant includes an anchor to the talar bone, and the top face is articulated with the bottom surface of the insert. The articulation surface being saddle-shaped and including a longitudinal central groove allowing the insert to move longitudinally and rotate transversely. The top face of the tibial implant includes, on its anterior edge, a shield covering the bottom anterior portion of the tibia, and the tibial face is inclined and forms an angle with the horizontal of between 15 and 45. Passages are provided in the shield for bone screws passing through in an ascending manner and open on the inclined tibial face.

The methods disclosed herein of generating three-dimensional lattice structures and reducing stress shielding have applications including use in medical implants. One method of generating a three-dimensional lattice structure can be used to generate a structure lattice and/or a lattice scaffold to support bone or tissue growth. One method of reducing stress shielding includes generating a structural lattice to provide sole mechanical spacing across an area for desired bone or tissue growth. Some examples can use a repeating modified rhombic dodecahedron or radial dodeca-rhombus unit cell. Some methods are also capable of providing a lattice structure with anisotropic properties to better suit the lattice for its intended purpose.

Embodiments of the present invention are directed to microscale and millimeter scale tissue scaffolding structures that may be static or expandable and which may be formed of biocompatible metals or other materials that may be coated to become biocompatible. Scaffold structures may include features for holding desired biological or physiological materials to enhance selected tissue growth. Scaffolding devices may be formed by multi-layer, multi-material electrochemical fabrication methods.

An expandable implant (100, 150, 160, 200, 250, 300, 400) has a base (10) and a displaceable element (12) hingedly interconnected at one end. At the other end, the base and the displaceable element are formed with complementary jaws (24, 26) which provide continuous overlap of facing surfaces over a range of angular positions of the displaceable element relative to said base. In some cases, the first end portion (16) of the displaceable element (12) is formed with projecting teeth (28) forming a partial gear centered on an axis (18) of the hinged interconnection with the base (12) for engaging a worm gear. In certain embodiments, the base is formed with a socket (30) for removably receiving a worm gear tool (32) for engaging the teeth (28) and displacing said displaceable element. After expansion, the worm-gear tool (32) can be removed.

Various embodiments of implant systems and related apparatus, and methods of operating the same are disclosed. In various embodiments, an implant for interfacing with a bone structure includes a web structure, including a space truss, configured to interface with human bone tissue. The space truss includes two or more planar truss units having a plurality of struts joined at nodes. Implants include one or more flexible struts that impart flexibility to the implant.

Various embodiments of implant systems and related apparatus, and methods of operating the same are described herein. In various embodiments, an implant for interfacing with a bone structure includes a web structure, including a space truss, configured to interface with human bone tissue. The space truss includes two or more planar truss units having a plurality of struts joined at nodes. Implants include one or more flexible struts that impart flexibility to the implant.

Bone implants, including methods of use and assembly. The bone implants, which are optionally composite implants, generally include a distal anchoring region and a growth region that is proximal to the distal anchoring region. The distal anchoring region can have one or more distal surface features that adapt the distal anchoring region for anchoring into iliac bone. The growth region can have one or more growth features that adapt the growth region to facilitate at least one of bony on-growth, in-growth, or through-growth. The implants may be positioned along a posterior sacral alar-iliac (SAI) trajectory. The implants may be coupled to one or more bone stabilizing constructs, such as rod elements thereof.

The present invention generally relates to bone implants. More specifically, the present invention relates to bone implants used for the fixation and or fusion of the sacroiliac joint and/or the spine. For example, a system for fusing and or stabilizing a plurality of bones is provided. The system includes an implant structure having a shank portion, a body portion and a head portion. The body portion is coupled to the shank portion and is configured to be placed through a first bone segment, across a bone joint or fracture and into a second bone segment. The body portion is configured to allow for bony on-growth, ingrowth and through-growth. The head portion is coupled to the proximal end of the shank portion and is configured to couple the shank portion to a stabilizing rod. Methods of use are also disclosed.

An intervertebral implant includes a body formed as an open lattice structure by a plurality of struts. Some of the struts of the plurality of struts intersect at nodes. The nodes can include an enlarged contact member that extends over the node and at least a portion of the width of some of the struts. Enlarged contact members may have an asymmetrical shape with respect to the intersection of struts. The enlarged contact members can provide improved bone contact for the implant. The plurality of struts can have a cross-sectional shape that includes a flattened portion. The flattened portion of the plurality of struts can provide improved bone contact for the implant. An additive manufacturing process can be used to build the implant in a substantially vertical direction.

A laterally deflectable asymmetric implant for implanting into a body may comprise a deflectable piece having distal and proximal ends and assuming a straightened insertion state. The backbone may abut or interconnect with said deflectable piece at the distal end of the deflectable piece. In a fully deflected state the implant may define an asymmetric shape, e.g. a D-shaped loop, defining an at least partially enclosed volume. The deflectable piece may comprise a sequence of segments interconnected at effective hinges. Longitudinal pressure applied to the proximal end of the deflectable piece (or applied to the backbone in an opposite direction) may cause relative longitudinal movement between the backbone and the proximal end of the deflectable piece and may generate outward horizontal movement of the deflectable piece away from the backbone. In one embodiment, the implant is implanted using lateral access into an anterior zone of a vertebra and deployed posteriorly.