Abstract: A surgical retractor includes a first component and a second component. The first component includes a ring structure and a conical outer wall. The ring structure has a first opening and defines a first plane. The outer wall forms an ellipse-shaped second opening in communication with the first opening and extends below the ring structure at an acute angle with respect to the first plane. The second component includes a top structure and a conical inner wall. The top structure has a third opening and defines a second plane. The inner wall forms an ellipse-shaped fourth opening in communication with the third opening and extends below the top structure at an acute angle with respect to the second plane. The top structure is disposed at least partially inside the ring structure such that the second component is rotatably adjustable with respect to the first component.

Abstract: Spinal disk including a shell, first endplate, second endplate and core. The shell includes sidewalls, back wall, front wall, top wall and bottom wall defining a compartment. The first endplate includes a first base, first top and first attachment. The first base is retained in the compartment. The first top is disposed about a first opening in the top wall forming a top contact surface. The first attachment extends from the first top portion. The second endplate includes a second base, second top and second attachment. The second base is retained in the compartment. The second top is disposed about a second opening in the bottom wall forming a bottom contact surface. The second attachment extends from the second top portion. The core is disposed in the compartment between the first endplate and the second endplate.

Abstract: Spinal disk including a shell, first endplate, second endplate and core. The shell includes sidewalls, back wall, front wall, top wall and bottom wall defining a compartment. The first endplate includes a first base, first top and first attachment. The first base is retained in the compartment. The first top is disposed in a first opening in the top wall forming a contact surface continuous with a surface of the top wall. The first attachment extends from the first top portion. The second endplate includes a second base, second top and second attachment. The second base is retained in the compartment. The second top is disposed in a second opening in the bottom wall forming a contact surface continuous with a surface of the bottom wall. The second attachment extends from the second top portion. The core is disposed in the compartment between the first endplate and the second endplate.

Abstract: An intervertebral fixation device and system are disclosed, including a weight-bearing shell, first anchor, second anchor, and key. The shell includes a first and second opposing sidewalls, a keyway that extends between and through the first and second sidewalls, and a first axis of rotation and a second axis of rotation that extend between the first and second sidewalls. The first anchor is rotatably coupled to the shell about a first axis of rotation and is disposed in a first orientation. The second anchor is rotatably coupled to the shell about a second axis of rotation and is disposed in a second orientation. The second orientation is divergent from the first orientation. The key is configured to be disposed in the keyway to support the first anchor in a third orientation and the second anchor in a fourth orientation. The third orientation is divergent from the fourth orientation.

Abstract: A system, device and method are disclosed for minimally invasive lateral intervertebral fixation. An intervertebral fixation device includes a weight-bearing shell configured to fit into a disk space between plural vertebrae, the weight-bearing shell including a keyway opening between and through plural sidewalls. A first plurality of anchors is rotatably disposed in a first orientation in relation to the weight-bearing shell. A second plurality of anchors is rotatably disposed in a second orientation in relation to the weight-bearing shell. A key is adapted to rotate the first plurality of anchors in divergent directions from the second plurality of anchors and to secure a first vertebra and a second vertebra, respectively.

Abstract: There is provided a polyaxial vertebral assembly. This assembly includes a polyaxial vertebral anchor and an articulating connector. The polyaxial vertebral anchor is configured to penetrate and secure to a vertebra. The articulating connector has a common trajectory split lock, which is configured to engage rigidly the polyaxial vertebral anchor in a selected pivotal configuration with respect to the polyaxial vertebral anchor and which is further configured to engage rigidly a stabilizing rod at selected configurable height and rotational configuration with respect to the polyaxial vertebral anchor. The pivotal configuration and the height and rotational configuration are independently adjustable through the common trajectory split lock.

Abstract: Corpectomy device comprising outer component, inner component and riser. The outer component includes a first endplate and first structure. The first structure includes a window and seat in communication with the window. The seat defines an opening to be pre-packed substantially with first grafting material. The inner component includes a second endplate and second structure at least partially disposed in the first structure in a first configuration. The second structure is to be pre-packed substantially with second grafting material. The riser has a third tubular structure to be received through the window into the seat to engage at least a portion of the second structure that extends the second structure into a second configuration with respect to the first structure. The third structure is to be pre-packed substantially with third grafting material such that first, second and third grafting material remain pre-packed substantially and in communication in the second configuration.

Abstract: Spinal disk including a shell, first endplate, second endplate and core. The shell includes sidewalls, back wall, front wall, top wall and bottom wall defining a compartment. The first endplate includes a first base, first top and first attachment. The first base is retained in the compartment. The first top is disposed in a first opening in the top wall forming a contact surface continuous with a surface of the top wall. The first attachment extends from the first top portion. The second endplate includes a second base, second top and second attachment. The second base is retained in the compartment. The second top is disposed in a second opening in the bottom wall forming a contact surface continuous with a surface of the bottom wall. The second attachment extends from the second top portion. The core is disposed in the compartment between the first endplate and the second endplate.

Abstract: An implantable spinal disk including an external shell, first endplate, second endplate and core component. The external shell includes sidewalls, a back wall, a front wall, a top surface and a bottom surface forming a compartment. The first endplate includes a first base, first top and first attachment devices. The first base is disposed in the compartment. The first top is disposed in a first opening in the top surface. The first attachment devices extend from within the first top portion. The second endplate includes a second base, second top and second attachment devices. The second base is disposed in the compartment. The second top is disposed in a second opening in the bottom surface. The second attachment devices extend from the second top. The core component is disposed in the compartment between the first endplate and the second endplate.

Abstract: A spinal plate system includes a screw, spinal plate and cap. A head of the screw includes a portion of a first sphere that has a first center and a portion of a second sphere that has a second center approximately concentric with the first center. A body of the screw extends from the first sphere. The spinal plate includes an opening through the spinal plate and an associated recess in the spinal plate that is eccentric with the opening. The cap includes an alignment opening and is configured to be rotationally engaged in the recess between a first rotational configuration and a second rotational configuration. In the first rotational configuration, the body threads into a vertebra in a selected trajectory through the alignment opening and the opening in the spinal plate and the head engages at least a portion of the opening in the selected trajectory.

Abstract: A surgical retractor includes a first component and a second component. The first component includes a ring structure and a conical outer wall. The ring structure has a first opening and defines a first plane. The outer wall forms a second opening in communication with the first opening and extends below the ring structure at an acute angle with respect to the first plane. The second component includes a top structure and conical inner wall. The top structure has a third opening and defines a second plane. The inner wall forms a fourth opening in communication with the third opening and extends below the top structure at an acute angle with respect to the second plane. The top structure of the second component is disposed at least partially inside the ring structure of the first component such that the second component is rotatably adjustable with respect to the first component.

Abstract: A fixation device, the device includes a housing with a leading deep surface, a trailing outer surface, weight bearing sides, and top and bottom surfaces, a shaft running from the leading deep surface to the trailing outer surface of the housing, and a plurality of blades preloaded onto the shaft in the housing, at least one first blade having at least one cutting extension in a first orientation about the axis of the shaft and at least one second blade having at least one cutting extension in a second orientation about the axis of the shaft that is opposite to the first orientation, each cutting extension having a sharp leading edge,-wherein upon clockwise or counterclockwise rotation of each blade of the plurality of blades about the axis of the shaft in a direction in which the at least one cutting extension of each blade is oriented, the at least one cutting extension of each blade will break an endplate of a vertebra, hook into the vertebra and rigidly secure the vertebra to the device to prevent separat

Abstract: A spinal fixation and fusion device that includes a housing with leading deep surface conforming to the posterior aspect of the intervertebral disk and trailing outer surface conforming to the anterior surface of the disk, weight bearing sides and the top and bottom surfaces with plurality of openings enabling ingrowths of bone. The device further includes a shaft running from the center of the deep surface and perpendicular to the deep surface of the housing to the center of the outer surface of the housing and affixed at least to the deep surface of the housing, and a flat metal member threaded onto the shaft with sharp leading edge which upon clockwise or counterclockwise rotation about the axis of the shaft will break the endplate, hook into the vertebra and rigidly secure the vertebra to the entire device preventing separation of the vertebra from the device during spinal motion.

Abstract: An apparatus for rigid fixation of individual vertebra to the stabilizing rod. It consists of an anchor secured to the vertebra and a connector with multiple degrees of freedom linking each anchor to a rod. Pressure from the rod against a connector engages internal constricting mechanism and eliminates movement within the connection. This results in rigid fixation between individual anchors and the rod.

Abstract: A system, device and method are disclosed for minimally invasive lateral intervertebral fixation. An intervertebral fixation device includes a weight-bearing shell configured to fit into a disk space between plural vertebrae, the weight-bearing shell including a keyway opening between and through plural sidewalls. A first plurality of anchors is rotatably disposed in a first orientation in relation to the weight-bearing shell. A second plurality of anchors is rotatably disposed in a second orientation in relation to the weight-bearing shell. A key is adapted to rotate the first plurality of anchors in divergent directions from the second plurality of anchors and to secure a first vertebra and a second vertebra, respectively.

Abstract: The present invention provides for a screw and rod fixation assembly for fixing a screw and, optionally, a rod. The screw and rod fixation assembly includes a screw, fixing mechanism, a substantially annular ring, rod seating mechanism, and locking mechanism. The present invention also provides for a fixing mechanism for fixing a screw, wherein the fixing mechanism further includes an inner surface wall having a gripping portion and a non-gripping portion. Further, the present invention provides for a substantially annular ring for guiding and providing mechanical and frictional force to a screw head. Additionally, the present invention provides for a rod seating mechanism operatively engaged to the screw head and including at least one flexible portion capable of being compressed against a portion of a rod therein. Finally, the present invention provides for a locking mechanism for engaging the rod and the rod seating mechanism.

Abstract: A bone plate assembly is disclosed utilizing at least one bone screw for fixation of adjacent bones of a spine including a base plate having at least one aperture extending therethrough and screw retaining mechanism mounted and movable on the plate between locked and unlocked positions relative to the aperture for preventing the bone screw from backing out from the base plate. A device is disclosed for placement into an aperture of a base plate including a screw retaining mechanism mountable and movable on a plate between locked and unlocked positions relative to an aperture for preventing a bone screw from backing out from the base plate. A snap ring for placement into an aperture of a base plate including a screw retaining mechanism mountable and movable on the plate between locked and unlocked positions relative to the aperture for preventing a screw from backing out is disclosed.

Abstract: A transverse connector includes a pair of transverse connector bodies and connector inserts for connecting a rod to each of the transverse connector bodies. A locking and fixing mechanism draws the transverse connector inserts into seat portions of the transverse connector bodies while simultaneously locking the transverse connector inserts in the insert seat portions and compressing a rod seat surface of the inserts to lock a rod within the rod seats. An interconnecting mechanism interconnects the pair of transverse connector bodies along an axis defined by the length of the transverse connector bodies.

Abstract: A transverse connector includes a pair of transverse connector bodies and connector inserts for connecting a rod to each of the transverse connector bodies. A locking and fixing mechanism draws the transverse connector inserts into seat portions of the transverse connector bodies while simultaneously locking the transverse connector inserts in the insert seat portions and compressing a rod seat surface of the inserts to lock a rod within the rod seats. An interconnecting mechanism interconnects the pair of transverse connector bodies along an axis defined by the length of the transverse connector bodies.

Abstract: A bone fixation plate assembly (10, 210, 210′) for fixation of the spine includes a mechanism (26) for allowing movement between adjacent vertebrae (18) while maintaining engagement of the bone fixation plate (12, 212, 212′) with the vertebrae (18).