Systems, devices, and methods for treating the spine are disclosed herein. Medical devices can be positioned along a subject's spine to treat various conditions and diseases. The medical device can include an actuator assembly and a clamp assembly. The actuator assembly can be positioned at an interspinous space between a superior spinous process and an inferior spinous process. The actuator assembly can be used to reconfigure the clamp assembly such that the clamp assembly clamps onto the superior and inferior spinous processes.

The present invention discloses spinous process fixation devices, systems, and instruments. The spinous process fixation device includes a first member, a second member, a third member, and a fourth member. Each of the first and second members includes a body and an engagement member and the engagement member of the first member couples to the engagement portion of the second member. Each of the third and fourth members also includes a body and an engagement member and the engagement member of the third member couples to the engagement portion of the fourth member. A method of assembling the spinous process fixation device and methods of using the spinous process fixation devices are also disclosed. A reamer instrument is also disclosed.

An implantable device may comprise a barrel, the barrel having an upper portion and a lower portion. The barrel may be configured to transition from a collapsed form having a first height to an expanded form having a second height and wherein the second height is greater than the first height. The implantable device may further include an actuator assembly disposed in the barrel, the actuator assembly comprising a front ramped actuator in engagement with the barrel, a rear ramped actuator in engagement with the barrel, and a central screw that extends from the rear ramped actuator through the front ramped actuator. The implantable device may further comprise a first plate and a second plate.

Orthopedic implant and methods of implantation for fixing adjacent bones. In one embodiment, the implant includes a locking mechanism that is adapted to be advanced by a locking instrument, wherein advancement of the locking mechanism in a first direction produces rotation of a first rigid abutment surface of the implant from a first orientation to a second orientation, and continued advancement of the locking mechanism produces advancement of the first rigid abutment surface towards a second rigid abutment surface of the implant. The continued advancement may also place a compressive load onto the implant sufficient to immobilize the implant relative to a first bony surface and a second bony surface.

An expandable facet joint fixation device, including a first collar, a central shaft including a first end and a second end, the first end rotatably connected to the first collar, a second collar including a radially inward facing surface, the second collar concentrically arranged around the central shaft, and one or more expandable members, each of the one or more expandable members including a first arm hingedly connected to the first collar, a second arm hingedly connected to the second collar, the second arm hingedly connected to the first arm, wherein when the second collar is displaced in a first axial direction relative to the first collar, the one or more expandable members displace radially outward in a first radial direction.

A plurality of individual tools is provided where each tool is uniquely configured to perform a step or a portion of a step in a novel procedure associated with the implantation of a stabilizing device (e.g., an interspinous spacer) for stabilizing at least one spinal motion segment. The tools are usable individually, or more preferably as a tooling system in which the tools are collectively employed to implant an interspinous spacer, generally in a minimally invasive manner. For example, each of the tools is arranged with coordinated markings and/or other features to ensure consistent depths of insertion, proper orientation of the tools with respect to each other or an anatomical feature of the patient, and precise delivery of the spacer to maintain safe positioning throughout the implantation procedure.

An improved mechanism for expanding or lifting a device in accordance with various embodiments of the present invention is a coaxial screw gear sleeve mechanism. In various embodiments, coaxial screw gear sleeve mechanisms includes a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing a device utilizing such a mechanism to expand or lift between a collapsed configuration and an expanded configuration.

Orthopedic implant and methods of implantation for fixing adjacent bones. In one embodiment, the implant includes a locking mechanism that is adapted to be advanced by a locking instrument, wherein advancement of the locking mechanism in a first direction produces rotation of a first rigid abutment surface of the implant from a first orientation to a second orientation, and continued advancement of the locking mechanism produces advancement of the first rigid abutment surface towards a second rigid abutment surface of the implant. The continued advancement may also place a compressive load onto the implant sufficient to immobilize the implant relative to a first bony surface and a second bony surface.

An interspinous posterior device (IPD) is described. The IPD has a body and bone fixation elements on either side of the body, each of said bone fixation elements having a ratchet locking mechanism for fixing the body to successive spinous processes of a mammalian vertebra. Each of the bone fixation elements is independently adjustable by ratcheting it separately and independently of the other bone fixation elements. The body of the IPD has a dynamic configuration and a non-dynamic configuration, wherein the dynamic configuration allows for both extension and flexion of the successive spinous processes and the non-dynamic configuration prohibits extension of the successive spinous processes. The IPD also includes a removable extension restriction block, wherein the extension restriction block can optionally be inserted in the body to prohibit extension or can be removed from the body to allow extension.

Interspinous process implants are disclosed. Also disclosed are systems and kits including such implants, methods of inserting such implants, and methods of alleviating pain or discomfort associated with the spinal column.