A long-pitch, helical anchor includes splines radially extending and helically progressing circumferentially around and along the arcuate length of a curved center line (central curve). The center line may progress along the curved length of the anchor with all splines meeting near the center line. In other embodiments, the center line passes along the center of a lumen or channel from which the splines extend radially along the length. A solid point acts as a cutting edge on a distal end of the anchor. All the splines converge to the center line. Installation may be with or without a stabilizing frame, such as may be used to fill gaps and promote bone growth between joined members. The anchors may be used directly to connect and provide compression between two bones or bone structures.

An implantable medical device is disclosed comprising a thermoplastic composite body having anterior, first lateral, second lateral, posterior, superior, and inferior surfaces, and at least one dense portion and at least one porous portion which are integrally formed. The at least one dense portion is formed of a first thermoplastic polymer matrix that is essentially non-porous, and which is continuous through a thickness dimension from the superior surface to the inferior surface. The at least one porous portion is formed of a porous thermoplastic polymer scaffold having a second thermoplastic polymer matrix which is continuous through the thickness dimension. A method for forming the thermoplastic composite body is disclosed comprising disposing a first powder mixture in a first portion of a mold, disposing a second powder mixture in a second portion of the mold, simultaneously molding the first powder mixture and the second powder mixture, and leaching porogen.

The invention features a glenoid (shoulder socket) implant prosthesis, a humeral implant prosthesis, devices for implanting glenoid and humeral implant prostheses, and less invasive methods of their use for the treatment of an injured or damaged shoulder.

Hard-tissue implants are provided that include a bulk implant, a face, pillars, slots, and at least one support member. The pillars are for contacting a hard tissue. The slots are to be occupied by the hard tissue. The at least one support member is for contacting the hard tissue. The hard-tissue implant has a Young's modulus of elasticity of at least 3 GPa, and has a ratio of the sum of (i) the volumes of the slots to (ii) the sum of the volumes of the pillars and the volumes of the slots of 0.40:1 to 0.90:1. Methods of making and using hard-tissue implants are also provided.

An orthopaedic prosthesis system includes a femoral component configured to be attached to a distal end of a patient's femur. A tibial tray is configured to be attached to a proximal end of a patient's tibia. A tibial insert is configured to be positioned between the femoral component and the tibial tray. An elongated pin rotatably couples the tibial insert to the femoral component.

In the present disclosure, an artificial joint stem includes a base including one or more grooves disposed on a surface of the base, and a coating film containing a calcium phosphate-based material and an antimicrobial material disposed on a part of the surface of the base. When among the one or more grooves, the groove located in a region where the coating film is disposed is defined as a first groove, and the groove located in a region where the surface of the base is exposed is defined as a second groove, a total length of the first groove is smaller than a total length of the second groove.

According to one example, a system for a knee arthroplasty that can optionally comprise: a femoral prosthesis having a joint facing surface and an opposing bone facing surface, wherein the femoral prosthesis has one or more attachment elements at or adjacent the bone facing surface; and one or more features selectively attachable with the femoral prosthesis via the one or more attachment elements, wherein the one or more features comprise one of a box, a stem, or a combination of the box and the stem.

An artificial articulation having stable fixing means for unicompartmental knee arthroplasty is stably attached to the top of a tibia in order to permit a sliding motion of an artificial joint attached to the bottom of a femur. The artificial articulation includes an implant hat part which a curved surface structure that makes surface contact with the artificial joint attached to the bottom of the femur is formed on an upper surface thereof, and protrusions protruding by a predetermined height in a direction of the top of the tibia are formed in large numbers on a lower surface thereof, and a distally extending stem configured to be formed to protrude downward by a predetermined length from the lower surface of the implant hat part, and to be inserted into the tibia by a predetermined depth from the top of the tibia and attached thereto.

A knee prosthesis comprises a unicondylar knee prosthesis having a unicondylar insert platform and a tibial base attached to a bottom side of the unicondylar insert platform. The unicondylar insert platform has a uniform stiffness gradient (e.g., a density or porosity gradient), whereas the tibial base has a non-uniform stiffness gradient (e.g., a density or porosity gradient) when the tibial base is viewed from a cross-sectional coronal plan. For example, the tibial base may have an area of greatest stiffness or density centrally located relative to an inboard and outboard side of the tibial base. Alternatively, the area of greatest stiffness or density may be located toward the outboard side. Additionally, the tibial base may include density wells having increased density relative to the surrounding area of the tibial base.

An intervertebral implant component of an intervertebral implant includes an outer surface for engaging an adjacent vertebra and an inner surface. A keel extends from the outer surface and is designed to be disposed in a slot provided in the adjacent vertebra. This keel extends in a plane which is non-perpendicular to the outer surface; and preferably there are two of the keels extending from the outer surface which are preferably offset laterally from one another. In another embodiment, an anterior shelf is provided at an anterior end of the outer surface, and this anterior shelf extends vertically away from the inner surface in order to help prevent bone growth from the adjacent vertebra towards the inner surface. Further in accordance with disclosed embodiments, various materials, shapes and forms of construction of the component and/or keel provide various benefits.