Abstract: A detector for use in artificial joint replacement includes a rotation detection apparatus and a pressure detection apparatus and is inserted between implant trials to allow numerical verification for medial and lateral balance of forces and a rotation state of the trials.

Abstract: A prosthetic disc for insertion between adjacent vertebrae includes a core having upper and lower curved surfaces, upper and lower plates, and peripheral restraining structure on at least one of the upper plate, the lower plate and the core. Each plate has an outer surface which engages a vertebra and an inner curved surface which slides over the curved surface of the core. The peripheral restraining structure serves to hold the core against a curved surface of at least one of the plates during sliding movement of the plates over the core.

Abstract: A kyphoplasty system disclosed herein includes various instruments which can be selectively used to perform a kyphoplasty operation on a patient. For example, in some embodiments the kyphoplasty system includes an inflation plunger that is used to deliver a balloon inflation medium to enlarge an implantable balloon device. Further, some embodiments described herein include a connection system between the implantable balloon device and its delivery shaft that is simple to construct and easy to use. For example, in some embodiments one or more sutures are used to releasably connect the implantable balloon device to its delivery shaft.

Abstract: A device for dispensing a bone cement from a container, comprising a connecting element for reversibly connecting the device to the container, a rod-like dispensing element, which at least partially has an external thread, a switching system, which at least partially has a first internal thread, wherein the first internal thread can be coupled in a positive manner to the external thread in such a way that the dispensing element can be axially screwed into the container in a first coupled switching system position, and the dispensing element can be pushed freely axially into the container in a second decoupled switching system position.

Abstract: The present embodiments include a cable cerclage system and method for the correction of fractures. The system and method can include a cable saddle including first and second loops extending from an upper surface thereof, the first and second loops including apertures extending therethrough and sized and shaped to receive a cerclage cable therethrough. The present embodiments are also directed to a cable cerclage system including at least one cable link, the cable link having a through-hole extending therethrough from a first end to a second end and including a first coupling member at a first and a second coupling member at a second end. The first coupling member of a first cable link is configured to couple to the second coupling member of an adjacent second cable link so that the through-holes of the first and second cable links align to form an elongated cerclage cable passageway.

Abstract: A smart surgical instrument for artificial joint replacement includes a femur resection device, a tibia resection device, and a detector having a shape corresponding to the resected surfaces of a femur and a tibia. The femur resection device includes a laser device such that the femur resection device can be aligned for resection of the femur without drilling an intramedullary hole, thereby preventing complications attributable to the intramedullary hole. The tibia resection device includes a laser device, thereby enabling an easy and fast surgical operation without using an extramedullary aligner used for alignment of a tibia during resection of the tibia. The detector includes a rotation detection means and a pressure detection means and is inserted between trials to allow numerical verification for medial and lateral balance of forces and a rotation state of the trials. The surgical instrument enables a precise, accurate, easy, and fast surgical operation.

Abstract: A surgical screw according to an exemplary aspect of the present disclosure includes, among other things, a shaft portion that extends between a proximal end and a distal end, the shaft portion including a first thread having a variable pitch and a head portion extending from the proximal end of the shaft portion. The head portion includes a second thread having a pitch that is equal to a pitch of at least a portion of the variable pitch.

Abstract: The disclosure discloses an acetabular cup holder for a hip joint, including a rubber-covered spindle. One end of the rubber-coated spindle is connected with a guide rod. A cup holding rod is arranged in the guide rod. The cup holding rod is provided with a screw thread at a position close to an opening end of the guide rod, and the screw thread extends out of the guide rod. A spring is arranged in a closed end of the guide rod. Kidney-shaped holes are formed in a side wall of a middle portion of the guide rod. A limiting pin is arranged at a position, corresponding to the kidney-shaped holes, of the cup holding rod. On one side of the kidney-shaped holes, a force releasing knob sleeves the outside of the guide rod. The limiting pin penetrates the kidney-shaped holes to be overlapped on the force releasing knob.

Abstract: The disclosed embodiments relate to systems and methods for a surgical tool or a surgical robotic system. An actuator or a motor of a tool driver is configured to operate a joint of a tool. One or more processors are configured to receive an initial joint command for the joint of the tool, determine a joint torque based on motor torque of the motor or actuator as well as motor to joint torque mapping, calculate a tip force based on an effective length associated with the joint and based on the joint torque, compare the tip force to a predetermined threshold, calculate an admittance control compensation term in response to the tip force exceeding the predetermined threshold, and generate a command for the motor or actuator based on the admittance control compensation term and the initial joint command.

Abstract: Tools and methods for expanding a precursor hole in a host material to receive a fixture. The precursor hole is enlarged by a rotary tool having helical flutes and interposed lands. The flutes have a negative rake angle. The lands each have a working edge that cuts the host material when the tool is rotated in a cutting direction, and that condenses the host material when the tool is rotated in a densifying direction. The body of the rotary tool has a stopper section that plugs the hole when a certain depth is reached. When the tool is used with a copious wash of irrigating fluid at or below the necessary depth, hydraulic pressure builds inside the precursor hole. The hydraulic pressure can be advantageously exploited in cutting mode to autograft a slurry of host material particles into the sidewalls of the hole and create an incipient densifying crust.

Abstract: One aspect relates to a bone cement applicator having a cartridge with an interior, a cartridge head with a delivery opening, a mixing member which is movable in the interior with a mixing rod. A delivery plunger is arranged in the cartridge and is mounted in the interior and is pressable in the direction of the delivery opening. The delivery plunger rests with an outer cylindrical circumferential surface against an inner wall of the cartridge. A clamping element is arranged on the inner wall of the cartridge in the region of a back side of the interior. The clamping element projects out of the inner wall of the cartridge. The cylindrical circumferential surface of the delivery plunger is resiliently deformable by the clamping element in the direction of a central cylinder axis, such that the delivery plunger is clampable in place with the at least one clamping element on the back side of the cartridge.

Abstract: A patella fracture fixation system includes a peripheral rim bone plate that is configured to be implanted along a parapatellar lateral approach. The bone plate can configured to minimize disruption of blood supply to the patella. The bone plate can be augmented with a Krackow suture pattern to assist in stabilization of a comminuted inferior pole.

Abstract: A prosthetic implant for engagement between first and second vertebrae. The implant includes a first plate configured for attachment to the first vertebrae and defining a first interbody connection member and a second plate configured for attachment to the second vertebrae and defining a second interbody connection member. An interbody component includes a body with a first end defining a first plate connection member configured for connection to the first interbody connection member and a second end defining a second plate connection member configured for connection to the second interbody connection member. A method of inserting the implant is also provided.

Abstract: A resection guide includes an anchor having bone anchoring features, a cutting block having a cutting guide defined therein, and a linkage flexibly connecting the cutting block to the anchor. The flexibility of the linkage provides the cutting block with six degrees of freedom of motion relative to the anchor.

Abstract: Robotic system and methods for robotic arthroplasty are provided. The robotic system includes a machining system and a guidance system. The guidance station tracks movement of one or more of various objects in the operating room, such as a surgical tool, a tibia of a patient, a talus of the patient, or a component of an implant. The guidance system tracks these objects for purposes of displaying their relative positions and orientations to the surgeon and, in some cases, for purposes of controlling movement of the surgical tool of the machining system relative to virtual cutting boundaries or other virtual objects associated with the tibia and talus to facilitate preparation of bone to receive an ankle implant system.

Abstract: A bone graft loading device includes a syringe comprising a nozzle at a distal portion of the syringe and an opening at a proximal portion of the syringe, and a plunger configured to force bone graft material from the reservoir through the nozzle. The plunger comprises a plunger body positioned at least partially within the syringe and defining a lumen. A tamp is positioned within the lumen of the plunger body and is configured to protrude distally of the plunger through the nozzle. The plunger mates with an inner wall of the syringe and the tamp to block passage of the bone graft material into the lumen of the plunger body. The plunger can be rotated to guide the bone graft material into the cannula, and the tamp can be periodically actuated to clear clogs that form at or near the nozzle.

Abstract: An intervertebral disc replacement device comprising a superior plate and an inferior plate, in which each plate contains one or more embedded magnets. The one or more magnets in the superior plate and the one or more magnet in the inferior plate are oriented such that a magnetic force exists between the one or more magnets in the superior plate and the one or more magnet in the inferior plate. In addition, an intervertebral disc replacement device comprising a superior plate and an inferior plate, in which each plate contains one or more embedded magnets, and the plates are designed to form an articulating surface. Further, an intervertebral disc replacement device comprising a superior plate, an inferior plate, and a spacer, in which each plate contains one or more embedded magnets, and the superior and inferior plates are designed to form articulating surfaces with the spacer.

Abstract: A bone anchor implant assembly configured for surgical implantation into a bone of a patient. The bone anchor implant assembly includes an elongate rod, a separate shank and head, and a closure mechanism configured as a one-part closure or two-part closure. The one-part closure and two-part closure are configured to be interchangeable with each other for closing a channel of the head and locking the assembly and the elongate rod between arms of the head with the closure mechanism.

Abstract: A modular bone plate includes a first plate member including a first connection portion having a first hole and a second plate member including a second connection portion having a second hole. The first plate member is connectable to the second plate member when the first plate member and the second plate member are arranged such that the first hole and the second hole overlap. The modular bone plate also includes a connector member that is insertable into the first hole and the second hole when the first hole and the second hole overlap such as to connect the first plate member and the second plate member. The connector member includes a passage that is configured to accommodate a portion of a bone anchor therein.

Abstract: A system for restoring height of a vertebral body with a balloon and stabilizing the vertebral body with bone cement. A delivery tube extends from a handle and may be formed from a flexible polymer and a radiopaque filler. The flexible polymer maintains a patent lumen along a curve so as to receive sequential introduction of the balloon and the bone cement to within the vertebral body at a location offset from a longitudinal axis. The radiopaque filler provides for at least a portion of the delivery tube being radiopaque under fluoroscopic visualization. The radiopaque filler may be barium, and the delivery tube may be constructed from coextruding the flexible polymer with the barium. Visual indicia on the handle may indicate a position of the delivery tube relative to another component of the system such as an access cannula. The visual indicia may indicate a direction of the curve.