According to one example, a posterior-stabilized femoral prosthesis for a knee arthroplasty. The femoral prosthesis can include medial and lateral condyles, a femoral cam and a recess. The medial and lateral condyles can be shaped to articulate with a tibial articular surface of a tibial bearing component through a range of motion, in which full extension corresponds to zero degrees flexion of a knee joint and positive flexion corresponds to greater than zero degrees flexion of the knee joint. In a sagittal plane, the medial and lateral condyles can define medial and lateral multi-radius curves, respectively. The medial multi-radius curve can have a single common radius swept through a first angular extent to define a single arc length that extends from between substantially 20 degrees flexion to substantially 90 degrees flexion, inclusive.

Unicompartmental tibial components are described herein. A first unicompartmental component (10) comprises a plate (12) having a bearing surface (18) and an opposing surface (22) that is configured to be secured to a proximal end of a patient's tibia, wherein the plate further comprises an anterior end (24), an outer side (25), a posterior end (26) and an inner side (27), wherein a mediolateral width W of the plate is defined between the outer and inner sides, and a longitudinal anteroposterior axis (28) extends between the anterior and posterior ends approximately one third of the width of the plate (i.e. 1/3 W) from the lateral side, and defines a longitudinal axis length L of the plate. A first elongate peg (14) protrudes from the opposing surface in the anterior portion, the first elongate peg defining a first peg axis (32). A second elongate peg (16) protrudes from the opposing surface in the anterior portion, the second elongate peg defining a second peg axis (34). The first and second peg axes are disposed at an angle of 45-70 degrees with respect to the longitudinal anteroposterior axis and are substantially parallel to one another such that the first and second pegs protrude posteriorly as well as distally with respect to the plate. An anterior portion of the plate comprises a part of the plate defined by an anterior 60% or less of the longitudinal axis length L, whilst a posterior portion of the plate comprises a part of the plate that is defined by the remaining posterior 40% or more of the longitudinal axis length L. The posterior portion of the opposing surface is free from pegs or other fixation devices, and the first and second elongate pegs are located more than half of the mediolateral width W of the plate from an outer edge of the plate. The component is configured for cementless fixation using an interference fit. Also described is a method of installation and a tool suitable for use in installation.

A tool configured to deliver a radially compressible hydrogel implant at a surgical site includes an introducer tube, a plunger provided inside the introducer tube and configured to travel from the proximal end of the introducer tube toward the distal end of the introducer tube urging the hydrogel implant through a sloped portion of the introducer tube radially compressing the implant before exiting through the distal end of the introducer tube, a handle connected to the introducer tube, and a clamp hingeably connected to the handle.

An apparatus and methods are provided for a tapered implant for treating osteochondral defects. The tapered implant comprises a top portion that includes a shape that approximates an osteochondral surface to be replaced. A bottom portion of the tapered implant is configured to be implanted into a hole drilled in bone. A cylindrical sidewall of the tapered implant has a diameter that decreases from a first diameter of the top portion to a second diameter of the bottom portion. The tapered implant comprises any monophasic synthetic material suitable for implantation into bone, including any of silicone, bioglass, peek, polyethylene, titanium, and cobalt chrome.

An extra-articular stabilization implant is disclosed. The extra-articular stabilization implant comprises: a body portion defining a longitudinal axis and having a proximal end and a distal end; a first helical thread formed on the body portion, the first helical thread having a first major diameter and a first minor diameter; a second helical thread formed on the body portion, the second helical thread having a second major diameter and a second minor diameter; and a head portion disposed at the proximal end of the body portion, the head portion having a driver receiving portion.

A medical grade thermoplastic or polymer implant with an osteoconductive coating is provided, specifically for corrections of the distal and proximal interphalangeal toe joints of the foot. The implant can be either straight or angled, and can be either solid or cannulated for insertion. The implant is sized and shaped depending on the specific anatomy and desired correction. End portions of the implant may be coated with an osteoconductive coating that promotes bone growth, but may reduce radiolucency. Thus, a central portion of the implant may remain uncoated to increase radiolucency of the implant at the region where two bones come together.

According to one example, a posterior-stabilized femoral prosthesis for a knee arthroplasty. The femoral prosthesis can include medial and lateral condyles, a femoral cam and a recess. The medial and lateral condyles can be shaped to articulate with a tibial articular surface of a tibial bearing component through a range of motion, in which full extension corresponds to zero degrees flexion of a knee joint and positive flexion corresponds to greater than zero degrees flexion of the knee joint. In a sagittal plane, the medial and lateral condyles can define medial and lateral multi-radius curves, respectively. The medial multi-radius curve can have a single common radius swept through a first angular extent to define a single arc length that extends from between substantially 20 degrees flexion to substantially 90 degrees flexion, inclusive.

The present invention relates to a spinal arthrodesis system including at least two types of implants from among the three following types: an intersomatic implant (IS), including at least one passage (40) mating at least one anchoring device (1); an interspinous implant (IE), including at least two wings able to run along a portion of the vertebral spines (EI, ES); a facet implant (IF) including a bone attachment.

A method of creating a wedge-shaped recess in a bone is disclosed. The method includes creating a cylindrical recess within a bone, positioning a tool within the cylindrical recess, radially expanding an articulating cutter of the tool and rotating the tool to remove additional bone along the cylindrical recess' side walls and create a wedge-shaped recess; wherein, a diameter of the bottom surface of the wedge-shaped recess is larger than a diameter of a surface opening of the wedge-shaped recess.

This invention improves upon prior art total disc replacements (TDRs) by more closely replicating the kinematics of a natural disc. The preferred embodiments feature two or more fixed centers of rotation (CORs) and an optional variable COR (VCOR) as the artificial disk replacement (ADR) translates from a fixed posterior COR that lies posterior to the COR of the TDR to facilitate normal disc motion. The use of two or more CORs allows more flexion and more extension than permitted by the facet joints and the artificial facet (AF). AF joint-like components may also be incorporated into the design to restrict excessive translation, rotation, and/or lateral bending.