An expandable interbody device for implantation within an intervertebral space is provided, together with methods and tools for use therewith. The interbody devices include a leading first and trailing second bearing member configured to expand laterally via connecting portions disposed at the trailing end of the first being member and at least the leading end of the second bearing member. In some forms, the connecting portions have an arcuate configuration. The insertion tool is configured expand the interbody device by holding the first bearing member while shifting the second bearing member.

The present invention provides an intervertebral implant for implantation in a treated area of an intervertebral space between vertebral bodies of a spine. The implant includes a spacer portion having an inferior and superior surface, wherein the inferior and superior surfaces each have a contact area capable of engaging with anatomy in the treated area, and the inferior and superior surfaces define a through-hole extending through the spacer body. The present invention further provides holes extending from a side portion to the inferior and superior surfaces of the spacer portion and a plate portion rigidly coupled to the spacer portion, wherein the plate portion contains holes for receiving screws. A fastener back out prevention mechanism adapted on the plate to prevent the back out of the fasteners from the holes and to secure the spacer to the plate of the intervertebral implant.

Systems for joint arthroplasty include prostheses which are secured to bone with sliding anchors. Examples include unicondylar and bicondylar knee prostheses for hemi-arthroplasty and total arthroplasty. Instruments guide the anchors into proper engagement with the prosthetic components. Methods of using the prostheses and instruments are disclosed.

An expandable corpectomy implant and methods of making and using same. The expandable spinal implant includes an inner member and an outer member. The inner member and outer member each have a first end, a second end and a sidewall. The inner member is positioned in the outer member and the inner member and the outer member have a selected cross sectional shape. The inner member is configured such that it slidably protrudes from the outer member. The inner member has at least one tab incorporated into the sidewall of the inner member and the outer member has at least one aperture formed in the sidewall of the outer member such that the at least one tab of the inner member engages the corresponding at least one aperture of the outer member so that the inner member is locked with the outer member.

Provided are systems, devices and methods for treating spinal injuries and abnormalities. For example, provided are spinal fusion devices and methods for treating degenerative disc disease using the spinal fusion device.

A bone fusion method, system and device for insertion between bones that are to be fused together in order to replace degenerated discs and/or bones, for example, the vertebrae of a spinal column. The bone fusion device includes a frame and one or more extendable plates. The bone fusion device is able to be inserted between or replace the vertebrae by using a minimally invasive procedure wherein the dimensions and/or other characteristics of the bone fusion device are selectable based on the type of minimally invasive procedure.

A surgical instrument for implanting a semi-rigid medical implant. The surgical instrument includes a shaft, an accessory shaft, an actuation mechanism and an implant engagement mechanism. The shaft has a channel formed therein. The shaft has a proximal end and a distal end. The accessory shaft is slidably mounted in the channel. The accessory shaft has a proximal end and a distal end. The actuation mechanism is mounted to the shaft proximate the proximal end thereof. The actuation mechanism is capable of causing the accessory shaft to slide with respect to the shaft. The implant engagement mechanism is attached to the distal end of the accessory shaft. The implant engagement mechanism is capable of engaging a semi-rigid surgical implant.

An expandable device for expanding and supporting body tissue comprises an inferior endplate having an outer surface configured to contact one body tissue surface and a superior endplate having an outer surface configured to contact an opposing body tissue surface. The inferior endplate and the superior endplate are movable relative to each other in a direction of expansion. The device includes an elevator captively supported between the inferior endplate and the superior endplate for independent movement along the direction of expansion. In the first direction the elevator is moved toward said superior endplate to lift the superior endplate and expand the device. In the second direction the elevator moves away from said superior endplate toward said inferior endplate to create a space for insertion of an insert into the expanded device.

Expandable spinal fusion devices, systems, and methods of using them are provided, and they can be inserted in a subject in a collapsed state through a small surgical corridor, and the expand cephalocaudal only, transverse only, or in both directions, in which direction of expansion can also be obtained independently, if desired, after the insertion. These inventions are valuable in reducing risk and surgical complexity, allowing for an on-the-fly selection of a desirable width footprint, a desired control of height expansion through a gradual cephalocaudal expansion, and a desired control of the alignment of the adjacent vertebral bodies. Devices, systems, and methods are also offered to provide a desired control of the contact area desired between the device and the upper and lower vertebral endplates achieved, for example, using an interdigitated endplate system.

The invention relates to an expandable interbody device used for interbody operations on the spinal column and belongs to the field of medical equipment.