42 results about "Lateral mass" patented technology

A device for accessing and guiding at least one fixation device to a spine may include a distal portion configured to fit in a facet of the spine and a proximal portion extending from the distal portion. The proximal portion may be detachable from the distal portion and may be hollow or solid. A system for accessing and guiding at least one fixation device to a spine may include a distal portion configured to fit in a facet of the spine, a proximal portion extending from the distal portion, and a slidable guide device for sliding over the facet guide device to guide at least one instrument to the spine.

A method of performing vertebral facet fusion by lateral approach and related devices. The lateral approach to facet fusion involves identifying the lateral mass and introducing any of the fixation methods known or described herein laterally at one or more facets through the use of a Kirschner wire guide, a cannulated bone drill and cooperatively cannulated staple guide. A surgical bone staple have a perforated bridge is used across the lateral facet joint where fixation is required. Where fusion is desired, a bone screw have lateral perforations of the shank is inserted through the cannulated staple guide and bridge perforation at the joint to promote fusion. A staple cap and graft container for overlay grafting may be utilized for additional fusion. The method involves less surgical time, reduced blood loss and discomfort for the patient as compared to the posterior approach.

A system for spinal fusion according to exemplary aspects involves a first screw and a second screw to be inserted into a lateral mass, wherein one of the first screw and the second screw comprises a rod configured to form a pivot joint with a tulip of one of the screws. A tulip of the first screw and a tulip of the second screw each comprise at least one slot configured to mate with the rod to thereby connect the first screw and the second screw. A method of exemplary aspects involves implanting a first screw and a second screw and connecting the screw by lowering a rod of one of the screws into a tulip of the other screw.

A device and method for anterior atlantoaxial stabilization may include one or more plates having a plurality of openings for receiving screws configured to screw into one or more C1 articular pillars, one or more C2 articular pillars, and the C2 body. A third cross-linking member may couple to first and second plates to provide additional rigidity and / or resistance to rotational forces. The cross-link member may be separate from one or both of the other plates. Alternatively, the cross-link member may be coupled, releasably or otherwise, to one or more of the other plates. Still further, one or more plates may be joined, e.g., via a single screw passing through openings in both plates or by making the device a unitary structure with a single, shared hole for the plates. One or more plates also may deviate from a substantially planar structure to better operatively engage the spinal features.

A device and method for anterior atlantoaxial stabilization may include one or more plates having a plurality of openings for receiving screws configured to screw into one or more C1 articular pillars, one or more C2 articular pillars, and the C2 body. A third cross-linking member may couple to first and second plates to provide additional rigidity and / or resistance to rotational forces. The cross-link member may be separate from one or both of the other plates. Alternatively, the cross-link member may be coupled, releasably or otherwise, to one or more of the other plates. Still further, one or more plates may be joined, e.g., via a single screw passing through openings in both plates or by making the device a unitary structure with a single, shared hole for the plates. One or more plates also may deviate from a substantially planar structure to better operatively engage the spinal features.

Disclosed are laminoplasty devices and systems, kits that include such laminoplasty devices or systems or components thereof; and methods of assembling and using such laminoplasty devices and systems. In particular, articulating laminoplasty devices are provided that allow lamina plates to be adjusted angularly and transitionally with respect to a cage connecting the lamina plates. Also provided are laminoplasty plates that are configured so as to be assembled with a bone graft housing, and which provide an opening configured to facilitate bone graft insertion into the housing. Further provided are expandable laminoplasty fixation systems that include a lateral mass plate, a lamina plate and a set screw that when screwed and unscrewed, allows one to contract and expand the plates with respect to one another.

A facet joint prosthesis comprises a pair of facet elements for engaging the superior and inferior articular processes of a facet joint. The facet elements are provided with one or more articulating surfaces for articulating movement there-between. The facet elements are also provided with a positive engagement means for preventing separation of the elements and / or to limit relative movement there-between within a pre-determined range. In one aspect, the invention provides a spacer for positioning between the facet elements and for distracting the facet joint. The spacer may also serve to form an artificial lateral mass between the superior and inferior articulating surfaces. The spacer may be provided with engagement means for positively engaging one or both of the facet elements.

A bone fracture plate formed by a vertebral plate comprises a reticular frame for holding a bone grafting material. The reticular frame comprises a bottom surface facing to the inner cavity of a vertebral canal, an upper side face and a lower side face. The top surface of the reticular frame is used for implanting and tamping the opening of the bone grafting material. The inner side face of the reticular frame is provided with an inner opening used for the connection of the broken ends of the vertebral plate and the bone grafting material inside the reticular frame. The outer side face of thereticular frame is provided with an outer opening used for the connection of the broken ends of a lateral mass of a cervical vertebra and the bone grafting material inside the reticular frame. The inner side on the top surface of the reticular frame is provided with a first mounting plate fixedly connected with the broken ends of the vertebral plate and the outer side on the top surface of the reticular frame is provided with a second mounting plate fixedly connected with the broken ends of the lateral mass. The invention has the advantages that the invention is capable of effectively and adequately grafting bone, preventing grafted bone piece from falling into the vertebral canal after surgery, and also preventing a callus from proliferating and protruding towards the vertebral canal.

The invention discloses an atlantoaxial dislocation reduction and internal fixation device, belongs to the field of medical instruments and aims at solving the problems of large risk, high difficulty and heavy wound of atlantoaxial dislocation treatment by use of the existing atlantoaxial internal fixation technology. The atlantoaxial dislocation reduction and internal fixation device comprises a connecting rod, lateral mass screws and vertebral plate occlusion nails; the connecting rod is U-shaped; the lateral mass screws are arranged on the two sides of the connecting rod, respectively to form a fixed support; two vertebral plate occlusion nails are mounted on the connecting rod by use of fastening screws, respectively; each vertebral plate occlusion nail comprises occlusion tweezers and a lifting sleeve; one end of the occlusion tweezers is hooked on an atlantoaxial back arch, while the other end of the occlusion tweezers is connected with the lifting sleeve; the other end of the lifting sleeve is provided with a U-shaped opening in which a spring is arranged; the connecting rod is located above the spring in the U-shaped opening and fixed by use of the fastening screw. The atlantoaxial dislocation reduction and internal fixation device is used for performing lifting reduction and fixation on the atlantoaxial back arch by tightening the fastening screws without skull traction, and is simple and safe to operate; only a minimal operative wound is formed.