The present disclosure provides an intervertebral cage including superior and inferior members each including an engagement surface for engaging a corresponding vertebrae. The intervertebral cage also includes a posterior member that extends between a posterior end of the superior and inferior members and spaces them from each other in a superior-inferior direction. The superior and inferior members extend in a posterior-to-anterior direction from the posterior member and define anterior free ends to form a substantially open anterior end between the superior member and the inferior member in a posterior-anterior direction. The engagement surfaces of the superior and inferior members substantially diverge from each other in the superior-inferior direction along the posterior-to-anterior direction. The superior and inferior members each include first apertures extending therethrough in the superior-inferior direction that define a pathway through the intervertebral cage in the superior-inferior direction.

A system and method for allowing any surgeon, including those surgeons who perform a fewer number of a replacement procedure as compared to a more experienced surgeon who performs a greater number of procedures, to provide an improved likelihood of a favorable outcome approaching, if not exceeding, a likelihood of a favorable outcome as performed by a very experienced surgeon with the replacement procedure. Force sensing is included to aid in quantifying installation of an implant, particularly a cup into a pelvic bone.

An expandable intervertebral fusion cage is independently expandable vertically and laterally. The fusion cage includes a cage body that can receive an expansion member that causes the fusion cage to expand vertically. The cage body is responsive to a compressive force to move to an expanded lateral position, whereby the fusion cage defines a substantially circular annular profile.

An expandable spinal interbody implant is provided that includes first/second components that are movable between collapsed and expanded states. Spaced apart surfaces with defined radii are associated with one of the components and cooperate with slots defined in the other of the components. A locking mechanism, e.g., a locking screw, may secure the components in a desired relative orientation.

A surgical instrument includes a chassis, a first driving shaft, a first measuring mechanism, a second measuring mechanism, and a first handle. The chassis defines a first channel and a second channel each extending from a proximal end to a distal end. The first measuring mechanism corresponds to rotation in the first channel. The second measuring mechanism corresponds to rotation in the second channel. The first driving shaft is operable to be inserted into the first channel, engaging with the first measuring mechanism. The first driving shaft has an end portion configured to engage and drive a first adjustable feature and/or a second adjustable feature on a work-piece. The handle is operable to be releasably attached to the first driving shaft for applying torque or operable to remove the first driving shaft from the first channel.

An apparatus or a system employs a fixation assembly to stabilize and prevent migration of an interbody fusion device placed between adjacent vertebral bodies, and/or provide supplemental fixation of adjacent vertebral bodies. The fixation assembly may include modular fixation plates insertable and attachable to the interbody fusion device in situ. In certain embodiments, the fixation assembly may include a single fixation plate insertable and/or attachable to the interbody fusion device in situ. In certain embodiments, fixation plates are integrally formed with the interbody fusion device.

A method and system for performing bone fusion and/or securing one or more bones, such as adjacent vertebra, are disclosed. The screws include a threaded tip connected to a main shaft and a threaded outer sleeve that rotates relative to the outer shaft until locked down. Independent rotation of the threaded outer sleeve relative to the threaded distal tip allows compression or distraction to modify the gap between the vertebral bodies. The screws are passed from the inferior to superior vertebra or superior to inferior, for example, through a trans-pedicular route to avoid neurological compromise. At the same time, the path of screw insertion is oriented to reach superior or inferior vertebra. An intervertebral cage of the system is configured for lateral expansion from a nearly straight configuration to form a large footprint in the disc space. The screws and cage may be combined for improved fixation with minimal invasiveness.

A method for imparting tension across a human knee joint which includes a femur bone, a tibia bone, a patella bone, a patellar tendon, and ligaments, wherein the ligaments and patellar tendon are under anatomical tension to connect the femur and tibia together, creating a load-bearing articulating joint. The method includes: providing a tensioning device, including: a baseplate; a top plate; and a linkage interconnecting the baseplate and the top plate and operable to move the tensioning device between retracted and extended positions, wherein the top plate is pivotally connected to the linkage so as to be able to freely pivot about a pivot axis; positioning the tensioning device between the femur and the tibia; applying an actuating force to the linkage to move the tensioning device towards the extended position, so as to impart a controlled separating force driving the femur and tibia apart to extend the ligaments.

Provided is a cage for spinal surgery, in which an elastic structure having elasticity and a porous structure are combined with each other to elastically support the vertebra and increase a bone fusion rate.

The cage for the spinal surgery includes an elastic structure having a plurality of leaf springs provided, respectively, on both sides of a frame, one end of which protrudes, and a porous structure coupled to the elastic structure while being elastically supported by the elastic structure, and disposed in space between neighboring vertebrae, with a plurality of bone fusion holes for bone growth being formed on a surface of the porous structure.

An orthopedic implant with an inferior portion having a tibia contact surface configured to extend over a tibia; a superior portion opposite to the inferior portion having a tendon contact surface configured to change a position of a patellar tendon by lifting or tilting the patellar tendon when the curved surface of the first portion is engaged with the tibia; and a fixation mechanism adapted to attach the orthopedic implant to the tibia, the orthopedic implant being further configured to change shape from a first configuration to a second configuration in response to a load applied between the tendon contact surface and the tibia contact surface. The invention also addresses corresponding methods.