Abstract: Intervertebral endoprosthesis discs suitable for surgical implantation between two vertebrae having and methods thereof. The prosthetic disc may have an endoprosthesis body including an anterior region and a posterior region designed to be positioned between a first vertebra and a second vertebra with a first and second movable insert positioned rotatably in anterior cavities and is rotatable to adjust the fasteners.

Abstract: A blade cartridge for use with a surgical saw includes a bar and a rack. The bar includes a first holding feature for removably holding the bar static to the saw. The rack includes a base moveably disposed in the bar and has cutting teeth defining extending beyond the bar. A drive link extends from the base, providing a second holding feature for releasably engaging a reciprocating drive integral with the saw. One of the base and the bar includes a guide slot. The other of the base and the bar includes a static member extending into the guide slot. The guide slot and the static member allow the rack to reciprocally move from proximal to distal to proximal along a longitudinal axis of the bar. The bar includes two plates and a spacer between the plates. The base is located between the plates.

Abstract: A system and methods for a safe and efficient distributing of bone graft material into an intervertebral disc space are provided. Systems are provided for receiving, removing, and replacing of preloaded load cartridges in a rapid and repeating manner. The systems can also be designed for rapidly delivering the biologics from a single load cartridge and, to even further facilitate a rapid and repeating delivery of biologics, the load cartridge and cartridge tamp can be adapted so that the cartridge tamp can capture and remove the load cartridge after delivery of fusion promoting material in the load cartridge.

Abstract: The invention refers to an extension device (1) for a bone screw (4) and to a screwdriver instrument (2) connectable to the extension device (1); it is proposed that the screwdriver instrument (2) comprises a toggle lever mechanism (62) having a first and a second lever arm (64, 66), which are pivotally connected to each other through a common articulation point (68), that the first lever arm (64) may be removably applied, in the area of its free end (70), at a first pivot bearing point (72) on the extension device (1) and is pivotally mounted and axially supported in the applied state, and that the second lever arm (66) is pivotally mounted and axially supported at a second pivot bearing point (74) on the shank, that the first lever arm (64) is elastically and longitudinally extendable, and that this longitudinal extensibility and a distance between the second pivot bearing point (74) and the common articulation point (68) of the lever arms (64, 66) are adapted to each other in such a way that when manually

Abstract: Systems and methods are provided in which intraoperatively acquired surface data is employed to verify the correspondence of an intraoperatively selected spinal level with a spinal level that is pre-selected based on volumetric image data. Segmented surface data corresponding to the pre-selected spinal levels may be obtained from the volumetric image data, such that the segmented surface data corresponds to a spinal segment that is expected to be exposed and identified intraoperatively during the surgical procedure.

Abstract: A metatarsal fixation device is provided for fixation of osteotomy or fracture of a distal metatarsal metaphysis bone of the human foot and for fixation of an associated capsule to the metatarsal head. The device includes a metallic bone plate with a series of screw holes along an elongated portion of the plate and a combination of a singular screw hole and a resilient clamp on an end of the elongated portion. The resilient clamp has two arched resilient arms extending laterally outward from an end of the elongated portion. Each arm has a plurality of spikes on an inner surface thereof providing points of contact that compress and attach a metatarsal phalangeal joint capsule portion to the medial and/or lateral aspect of the metatarsal head, thereby facilitating realignment of the metatarsophalangeal joint and respective digit. The resilient arms are biased to grasp lateral sides of a metatarsal head and any associated capsule portion.

Abstract: A guide for a bone cut comprises a guide base having an inner wall defining an opening. The inner wall has a plurality of detents distributed around the opening. The guide base has a proximal surface adapted to contact a skin of a person. An inner collar has one or more spring loaded devices extending outward from the inner collar in opposite directions. The inner collar is mountable with the spring loaded devices fitting within one or more of the plurality of detents. The inner collar has an inner wall defining a bore for receiving a cutting tool. The inner collar is configured to pivot the cutting tool about an axis, for cutting a bone. The axis lies along or parallel to a line along which the spring loaded devices lie.

Abstract: A bone graft delivery device, including a dilator sheath arranged to be connected to a first transverse process, the dilator sheath having a first window, a ramp guide removably engageable with the dilator sheath and arranged to be connected to the first transverse process, the ramp guide including a second window and a ramp at least partially connected to the second window, a snake sheath, and a snake arranged to feed the snake sheath through the ramp guide and out of the first and second windows toward a second transverse process, the second transverse process being adjacent to the first transverse process.

Abstract: An eyelid speculum used to hold the eyelids of a patient's eye open during a medical procedure includes two retractors which are configured to engage the edge of a patient's eyelid and a central opening between the retractors which permits the medical practitioner to view the cornea of a patient's eye during a medical procedure. The eyelid speculum can be provided in a sterile medical kit.

Abstract: Disclosed is a dynamically stabilizing intervertebral implant composed of a stabilizing wedge (1), a blocking pin (2), a locking screw (3), and a flexible link in the form of a strap. The stabilizing wedge includes a recess (12) through which the strap can pass. The blocking pin can come into engagement with the wedge by movement inside the recess in the direction of the main axis of the body of the wedge in such a way that the longitudinal axis of the blocking pin firstly coincides with the longitudinal axis of the recess, secondly is perpendicular to the longitudinal axis of the first strap portion inside the recess, and thirdly is parallel to the surface of the first strap portion inside the recess. The strap is immobilized with respect to the stabilizing wedge by being clamped between the blocking pin and the inner wall of the recess.

Abstract: Methods are disclosed for designing a tibial implant to minimize cortical impingement of a keel or other fixation structure when the tibial implant is implanted in the tibia bone. The design of the keel or other fixation structure on the tibial baseplate can be based on determining a common area between defined cancellous regions of at least two tibia bones. Methods are disclosed for designing a femoral component having a stem extension such that the stem can be sufficiently placed in the diaphysis of the femur when the femoral component is implanted. The method includes determining a canal axis in a femur that creates adequate engagement between a reamer and the diaphysis of the femur.

Abstract: Retro guidewire reamers include a drill having a tubular shaft configured to be disposed over a guidewire and at least one cutting member movably disposed adjacent the distal end of the shaft. A slide actuator is moveably coupled to the shaft and to an actuator wire slidable along the shaft. The actuator wire is operative to move the at least one cutting member between a closed position and a deployed position when the slide actuator is moved along the shaft. The retro guidewire reamers include mechanisms to protect the mechanical joint between the actuator wire and the slide actuator which prevent the actuator wire from disengaging from the slide actuator when the cutting member is obstructed by a guidewire.

Abstract: A rotary mill is disclosed comprising a body portion (4) having a milling surface (10) and a central bore (30) extending along an axis of rotation (18) of the body portion (4); and a guide portion (6) having a guide body (22) and a guide peg (24) extending from the guide body (22), the guide peg (24) operable to be received in the central bore (20) of the body portion (4), the guide body (22) having at least one alignment feature (28, 30) which is the same as that of a prosthesis component.

Abstract: A chemical mechanical polishing machine includes a polishing head assembly including a polishing head body and a membrane disposed at a bottom of the polishing head body. The bottom surface of the membrane includes a hydrophobic area and a hydrophilic area.

Abstract: Anchor removal instruments and methods for using the instruments are provided. In some embodiments, an intervertebral implant anchor extractor tool comprises a support, a support retainer configured to hold the support fixed with respect to the implant, an extractor having an anchor retainer, and an extractor guide. An embodiment of a method of using this implant anchor extractor tool comprises the steps of obtaining access to an anchor, grasping the anchor, and applying a withdrawal force on the anchor while applying a countervailing force against the implant or a vertebral structure.

Abstract: Methods of filling bone cavities are provided. The methods use a bone cement mixing and delivery device that includes a shaft extending along an axis from a first end to a second end and including a passageway. The first end includes an adapter having a first opening that is in communication with the passageway. The second end includes a second opening that is in communication with the passageway. The shaft includes a mixing portion between the first and second ends. A connector includes a central portion that that is coupled to the adapter. The central portion includes a channel that is in communication with the first opening. The connector includes first and second ports that extend from the central portion. The first port includes a first lumen that is in communication with the channel. The second port includes a second lumen that is in communication with the channel.

Abstract: A tool for scrubbing, removing tissue from the medullary cavity or joint cavity of a bone or removing cartilage and/or cortical bone from a joint cavity has a proximal end, a distal end, and a cannula extending therethrough. The distal end includes at least one scraping surface and/or cutting surface to soften marrow in the medullary cavity or joint cavity as the scraping and/or cutting surface(s) are rotated or otherwise moved relative to the medullary cavity or joint cavity. When used, the tool may be attached to a drill and the cannula receives a K-wire previously inserted into the medullary or joint cavity. The drill rotates the tool around the K-wire and pushes the tool over the K-wire into the medullary cavity or joint cavity.

Abstract: A bone cement mixing and delivery device includes a shaft extending along an axis from a first end to a second end and including a passageway. The first end includes an adapter having a first opening that is in communication with the passageway. The second end includes a second opening that is in communication with the passageway. The shaft includes a mixing portion between the first and second ends. A connector includes a central portion that that is coupled to the adapter. The central portion includes a channel that is in communication with the first opening. The connector includes first and second ports that extend from the central portion. The first port includes a first lumen that is in communication with the channel. The second port includes a second lumen that is in communication with the channel. Methods of use are disclosed.

Abstract: A positioning mark apparatus of a surgery navigation system and an implementation instrument thereof are disclosed. The positioning mark apparatus includes a positioning base and a frequency modulated radio frequency positioning module. One end of the positioning base is a lock portion having a screw structure, another end is a head having a joint structure, and a free end of the head has a fitting structure. The frequency modulated radio frequency positioning module has a sleeving structure that cooperates with the head structure and buckles with the joint structure. The frequency modulated radio frequency positioning module includes an antenna unit, a printed circuit board unit electrically connected to the antenna unit, and an electronic component battery unit supplying power to the printed circuit board unit. The frequency modulated radio frequency positioning module may transmit, according to a received frequency modulated signal, a feedback signal including a radio frequency signal to the external.

Abstract: A bone fixation element includes a threaded head and a shaft extending along a longitudinal axis from a proximal end to a distal end, an outer surface of the head being one of carburized and nitrided and including a first groove extending into an outer surface of the head along a path interrupting the threading and extending along an angle counter to an angle of the threading.