A method of treating a spine includes implanting a spinal implant within a patient. The spinal implant includes a first member having a first wall defining an axial passageway and a first opening, the first opening being in communication with the axial passageway. A second member includes a second wall defining an axial channel having the first member disposed therein, the second wall defining a second opening in communication with the axial channel. Bone graft is injected through the first opening and into the axial passageway and through the second opening and into the axial channel after the spinal implant is implanted within the patient.

An expandable vertebral body implant, and methods of assembly and using the implant. The vertebral body implant includes a body with a first end and a second end, a rotating member rotatably coupled to the first end of the body, wherein an end includes a plurality of first notches inset into the rotating member, an extension member moveably coupled to the rotating member, and a locking member positioned on an interior of the body. Methods for assembling and using the vertebral body implant are also disclosed.

An expandable intervertebral implant includes a superior plate having a proximal end, an opposing distal end, and a threaded first hole. An inferior plate has a proximal end, an opposing distal end, and a first bore, the inferior plate at least partially bounding an elongated channel that communicates with the first bore. A first lift screw includes a gear wheel rotatably received within the first bore of the inferior plate and a threaded stem projecting from the gear wheel and being threaded into the first hole of the superior plate. A drive screw is rotatably disposed within the channel of the inferior plate, the drive screw having a worm that engages with the gear wheel such that rotation of the drive screw facilitates rotation of the first lift screw which in turn facilitates movement of the superior plate relative to the inferior plate.

A spinal implant includes a first member extending along a first axis between opposite first and second ends. The first end includes a first part. A rack is coupled to the first member. A second member extends along a second axis between opposite first and second ends. A gear is coupled to the second member such that the gear engages the rack. An actuator includes a second part that engages the first part such that rotation of the actuator relative to the members translates the rack relative to the first member along the first axis to move the implant between a first orientation in which the second longitudinal axis extends parallel to the first longitudinal axis and a second orientation in which the second longitudinal axis extends at an acute angle relative to the first longitudinal axis. Systems and methods are disclosed.

A spinal implant includes a chassis extending along a first axis and including a first thread. A first member extends along a second axis and is pivotably coupled to the chassis. A second member extends along a third axis between and is pivotably coupled to the chassis. A rack includes opposite top and bottom surfaces. A first spur is coupled to the first member such that the first spur engages the top surface. A second spur is coupled to the second member such that the second spur engages the bottom surface. An actuator includes second thread that engages the first thread such that rotation of the actuator move the implant between a first orientation in which the second and third axes extend parallel to the first axis and a second orientation in which the second and third axes extends at an acute angle relative to the first axis.

A spinal implant includes a first member extending along a first axis between opposite first and second ends. The first end includes a first part. A rack is coupled to the first member. A second member extends along a second axis between opposite first and second ends. A gear is coupled to the second member such that the gear engages the rack. An actuator includes a second part that engages the first part such that rotation of the actuator relative to the members translates the rack relative to the first member along the first axis to move the implant between a first orientation in which the second longitudinal axis extends parallel to the first longitudinal axis and a second orientation in which the second longitudinal axis extends at an acute angle relative to the first longitudinal axis. Systems and methods are disclosed.

A spinal implant includes a chassis extending along a first axis and including a first thread. A first member extends along a second axis and is pivotably coupled to the chassis. A second member extends along a third axis between and is pivotably coupled to the chassis. A rack includes opposite top and bottom surfaces. A first spur is coupled to the first member such that the first spur engages the top surface. A second spur is coupled to the second member such that the second spur engages the bottom surface. An actuator includes second thread that engages the first thread such that rotation of the actuator move the implant between a first orientation in which the second and third axes extend parallel to the first axis and a second orientation in which the second and third axes extends at an acute angle relative to the first axis.

An expandable intervertebral implant includes a superior plate having a proximal end, an opposing distal end, and a threaded first hole. An inferior plate has a proximal end, an opposing distal end, and a first bore, the inferior plate at least partially bounding an elongated channel that communicates with the first bore. A first lift screw includes a gear wheel rotatably received within the first bore of the inferior plate and a threaded stem projecting from the gear wheel and being threaded into the first hole of the superior plate. A drive screw is rotatably disposed within the channel of the inferior plate, the drive screw having a worm that engages with the gear wheel such that rotation of the drive screw facilitates rotation of the first lift screw which in turn facilitates movement of the superior plate relative to the inferior plate.

A method of treating a spine includes implanting a spinal implant within a patient. The spinal implant includes a first member having a first wall defining an axial passageway and a first opening, the first opening being in communication with the axial passageway. A second member includes a second wall defining an axial channel having the first member disposed therein, the second wall defining a second opening in communication with the axial channel. Bone graft is injected through the first opening and into the axial passageway and through the second opening and into the axial channel after the spinal implant is implanted within the patient.

A tibial sample implant for use in knee joint replacement surgery has a lower part and an upper part. The upper part has a sliding surface designed to interact with a femoral component. A height adjustment mechanism can move the upper part in a guided manner relative to the lower part between a first position, in which the sliding surface is positioned at a first height above the lower part, and a second position, in which the sliding surface is positioned at a second height above the lower part. The height adjustment mechanism has a drive gear and a control cam. An output element is rotationally fixed to the upper part and has a support section supported on the control cam so that the upper part can be moved between the first position and the second position by a rotational movement of the drive gear.