A prosthesis assembly is provided that includes a base member that has a helical structure and a cylindrical member opposite the helical structure. The cylindrical member is configured for direct connection with a reverse insert of a reverse shoulder assembly. The cylindrical member is configured for direct connection with a reverse insert spacer in some embodiments. The reverse insert can be inserted into a space defined at least in part by a wall of the cylindrical member and an inferior wall of the of the base member. The helical structure extends between a first end and a second end. The base member also can include one or more pathways. The pathway(s) is accessible from the second end and is directed toward the first end through the helical structure. The pathway is located inward of an outer periphery of the helical structure, e.g., adjacent to an inner periphery of the helical structure. The pathway extends in a space between successive portions of the helical structure. The prosthesis assembly can include a locking device that has a support member and an arm that projects away from the support member. The arm is configured to be disposed in the pathway when the support member is disposed adjacent to the second end of the base member. The arm is disposed through bone in the space between successive portions of the helical structure when the prosthesis assembly is implanted.

A glenoid implant system includes an anchoring structure and a glenoid liner. The anchoring structure includes a base, a wall, and a ledge. The wall extends from a first surface of the base. The ledge extends generally along at least a portion of a first side of the wall, thereby forming an undercut. The wall has a slot formed in a second opposing side of the wall. The glenoid liner is configured to be removably coupled to the anchoring structure. The glenoid liner has a cap portion, a main body, and a deflectable finger. The main body extends from the cap portion and includes a lip configured to engage the undercut of the anchoring structure. The deflectable finger extends from the cap portion. The deflectable finger has a protrusion configured to engage the slot of the anchoring structure to aid in securing the glenoid liner to the anchoring structure.

A trial liner for use in a hip arthroplasty surgical procedure is disclosed. The trial liner includes a rim and a semi-hemispherical body attached to the rim. The semi-hemispherical body includes a concave inner wall extending inwardly from the rim to define a cavity, a convex outer wall extending from the rim opposite the inner wall, and an interior wall extending between the inner wall and the outer wall and defining an opening at an apex of the semi-hemispherical body. The semi-hemispherical body is adapted to deflect and modify the opening, when pressed against a head of a screw, to accept the head of the screw within the opening. A system that includes the trial liner and the screw, and a method for using the system in a surgical procedure, are also disclosed.

Disclosed is a prosthetic joint assembly for joining a humerus bone to a scapula bone, comprising a humeral component adapted for engagement with said humerus bone and a concave dish; a scapular component adapted for engagement with said scapula bone and a convex surface adapted to engage said concave dish; wherein when said components are implanted and engaged in a rest position said prosthetic center of rotation is displaced in a direction that is inferior and medial relative to a natural center of rotation and said humerus bone is displaced in a direction that is inferior relative to said natural center of rotation.

An expandable interbody fusion device and an associated instrument for inserting the device into an intervertebral disc space, expanding the device and for use in delivering graft material into the device once expanded in the disc space. The device is small enough to fit through Kambin's triangle yet is capable of expanding both in the vertical direction to accommodate spinal lordosis and in the lateral direction to provide sufficient structural support for opposing vertebral bodies laterally within the disc space. A process of forming textured top and bottom surfaces of the device by initially laser ablating each surface with a nano-second pulsed laser followed by laser ablating those surfaces with a femto-second pulsed laser.

An expandable intervertebral fusion implant, including a base, an inferior component arranged on a first side of the base, a superior component arranged on a second side of the base, opposite the first side, a first worm rotatably arranged in the base and including a through-hole, a second worm rotatably arranged in the base, the second worm concentrically aligned with and spaced apart from the first worm, and an expansion mechanism, including a first screw extending between the base and the superior component, and a second screw non-rotatably connected to the first screw and extending between the base and the inferior component wherein as the first worm is rotated in a first circumferential direction, the first screw and the second screw rotate in a second circumferential direction and the inferior component and the superior component are displaced relative to the base.

Provided are tibia stem components of ankle replacement prosthesis that are designed to engage dense tibia bone to reduce implant migration over long term.

A biocompatible construction adapted for use in joint surgeries. Among other things, the joint implant has an anterior cutting edge and a rotatable cutter distinct from the cutting edge. The rotatable cutter allows for graduated cutting of biological tissue or structure.

The invention relates to medical implants, including spinal implants and bone grafts, for fixation and integration with hard tissue. The bone medical implants include at least one rotational fixation mechanism that further includes or is attached to one or more sharp protrusions configured to penetrate and become lodged into hard tissue to provide support and positional stability. Such support is useful to ensure that the spinal bone graft may be used without additional stabilizing or anchoring structures, such as supporting plates or screws.

The dynamic implant fixation plate and implant configured to accept the disclosed fixation plate can, in some aspects, provide a means of fixing an implant relative one or more planes while allowing motion relative to one or more planes. The use of the disclosed fixation plate and corresponding implant can reduce the occurrence of stress shielding and permit enhanced loading of the implant site.