A facet joint replacement device includes an enclosing element including an enclosing body and an inferior attachment member. The enclosing body includes an inner cavity defined by an interior surface of the enclosing body, wherein a portion of the interior surface of the enclosing body forms a superior articulating surface. The facet joint replacement device also includes an inferior articulating element including an articulating body and a superior attachment member. The inferior articulating body is positioned within the inner cavity of the enclosing body of the enclosing element and is configured to move within the inner cavity of the enclosing body of the enclosing element. The inferior articulating body includes an inferior articulating surface. The movement of the articulating body of the inferior articulating element is constrained in at least one direction within the inner cavity of the enclosing body of the enclosing element.

Anchoring devices for rachidian implants, implants, surgical instruments, and surgical systems and methods are disclosed. In some embodiments, an anchor comprises a stiff plate with a longitudinal axis, configured for penetration of its anterior end into a vertebral surface while its posterior end remains engaged with the implant. An implant may include a locking mechanism for the anchor. An anchor may include an abutment configured to abut a complementary abutment of an implant. In some configurations, inserting an anchor in a passage of an implant may displace a locking mechanism, which may resile and lock the anchor in the implant with complementary abutments of the anchor and implant abutting.

An insertion instrument for expandable spinal implants includes an elongate member, a shuttle, and a worm gear. The elongate member includes a handle portion of a proximal end and an end effector on a distal end, wherein the end effector is configured to be releasably engaged to an expandable spinal implant. The shuttle is slidably disposed within a cavity defined within the end effector and includes a wedged shaped distal end configured to engage an expandable spinal implant. The worm gear is rotatably disposed within the cavity defined in the end effector and is in mechanical communication with the shuttle, such that rotation of the worm gear effectuates movement of the shuttle. Distal movement of the shuttle effectuates articulation of an expandable spinal implant. A method of performing surgery is also disclosed.

A spacer for insertion between two vertebrae includes a variable axial length and comprises a first member having a hollow interior and a tubular wall and a second member having a hollow interior and a tubular wall the second member being slidable within the first member in an axial direction for adjusting an overall length. At least the first member or the second member comprises an access opening in its wall, the opening having a size which is adapted for inserting bone grafts through the opening into the interior. The spacer further comprises a length adjustment structure being engageable with an expansion tool for telescoping the second member relative to the first member and a locking structure for fixing the axial length. The access opening, the length adjustment structure and the locking structure are arranged so as to be accessible from the same side of the spacer. The spacer allows in situ filling of bone grafts into its interior and an improved handling.

A prosthesis includes a first and second plate; elements for mounting the plates to pivot about an axis, which include a flexible hinge including a cylindrical plane flexible strip with two cylindrical swellings respectively associated with two edges of the strip, the dimension of the cross-sections of the swellings, taken in a direction perpendicular to the plane containing the pivot axis and passing through the swellings, being greater than the thickness of the strip taken in the same direction, a hole in each plate of shape complementary to the swellings and opening out in a first face of the corresponding plate; a slot made in each plate and opening out into the hole of that plate, in a second of its faces, and in the first face, the hinge and plates being mounted to so that the swellings and the strip are situated respectively in the two holes and slots.

A method for implanting a medical device for implantation in a mammal joint. The method comprising the steps of creating an opening reaching from outside of the human body into the joint, providing said artificial contacting surface to said joint, fixating the artificial contacting surface to the joint, implanting said reservoir in the human body, and lubricating the artificial contacting surface with use of a lubricating fluid contained in said reservoir.

Intervertebral spacer assemblies, systems, and methods thereof. A method of insertion include inserting an intervertebral spacer and plate together using an insertion tool and, upon removal of the insertion tool, the intervertebral spacer and plate are no longer considered connected/coupled and act as separate components.

A tool assembly for extracting a liner from a prosthesis comprising an impactor and a faceplate. The impactor can be configured to receive and transmit a force. The faceplate can be configured to deliver the force from the impactor to the prosthesis to separate the liner from a shell of the prosthesis.

A package for receiving an adapter sleeve for a hip endoprosthesis, the hip endoprosthesis comprising a ball head which has to be pushed onto the adapter sleeve with a defined pushing-on force. For simplification and secure fastening of the ball head on the adapter sleeve, it is proposed according to the invention that a device for the mounting of the ball head on the adapter sleeve is integrated in the package and this device comprises indicating elements which indicate that the defined pushing-on force has been reached when the ball head is pressed onto the adapter sleeve. Preferably the package has indicating elements.

A kit including a first component having a male taper and a second component having an internal bore with a female taper. The first component and second component being engageable via the male and female tapers. The kit further including a disassembly tool having a body and an expandable portion separable from the body, such that the expandable portion has an initial outer diameter equal to the inner diameter of the internal bore of the second component.