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.

A kit for orthopedics, preferably for osteosynthesis, has a mechanical fixing system that includes a plate for straddling between two bone fragments and fixing screws for fixing the plate to the two bone fragments. The plate has a thickness of about 0.5-4 mm and conical through holes, the fixing screws each having a head, a self-tapping stem, and a conical collar interposed between the head and the self-tapping stem to define a conical coupling within a corresponding conical through hole of the plate. The heads of the fixing screws have a upper surfaces with a recessed and shaped mark for coupling with the tip of a screwing tool and external side walls with a thread for engaging a gripping tool. When the conical collar is inserted into a corresponding conical through hole of the plate, the head protrudes outwardly from the plate.

Compression/reduction drivers for performing surgical methods are provided. Exemplary surgical methods that may be performed using the compression/reduction drivers described herein include, but are not limited to, arthrodesis procedures (i.e., bone fusion procedures), fracture fixation procedures, etc. The compression/reduction drivers are configured to simultaneously and independently apply a force against a bone segment and drive a fixation device into the bone segment.

An instrument for holding and inserting a bone anchor into a bone is provided, where the bone anchor includes a shank for anchoring in the bone and a head. The instrument includes a holding member for holding the head of the bone anchor and has a plurality of arms configured to at least partially encompass the head, where the arms include an inner surface forming a seat for the head. The instrument also includes a drive shaft for engaging the head of the bone anchor and defining a longitudinal axis of the instrument. The instrument further includes a displacement member configured to act on the holding member. The holding member can assume a first configuration in which it is configured to permit the head to enter the seat and a second configuration in which it is configured to hold the head in the seat.

A compression screw comprising a threaded shaft and a head associated with the proximal end of the shaft. The head has a plurality of outwardly extending projections spaced from one another so as to define a plurality of recesses there between for receiving a screw drive in such a way that rotational force may be transferred from the screw drive to the screw. The projections of the head may be provided with suture fixation holes or a suture coupling may be positioned over the shaft so as to extend between the projections of the head.

A compression screw for applying compression at a bone joint. The compression screw includes an axial screw body extending from a distal end to a proximal end with the distal end including a series of bone engaging threads configured to be self-drilling and self-tapping and the proximal end including a head which defines a radially extending shoulder. At least one proximal rotary cutting structure is defined proximally of the bone engaging threads. The at least one proximal rotary cutting structure is configured to be self-drilling such that a proximal portion of the axial screw body cuts into and advances within a bone of the bone joint as the axial screw body is advanced. A method of inserting the compression screw is also provided.

A modular surgical instrument is provided that includes a tower having a first end, a second end and a ratchet segment between the first end and the second end. The instrument includes a ratchet reduction mechanism. The ratchet reduction mechanism includes a ratchet lever, a linear ratchet rack integrated into a ratchet segment of the tower at a location between the first end and the second end, and a ratchet collar coupled to the ratchet lever. The ratchet collar is configured to slide along the ratchet segment by application of an applied force. The instrument includes a reducer that may be affixed to the ratchet reduction mechanism. The reducer is configured to move in unison with the slide of the ratchet collar.

A tool for a bone implant includes a rod and an adaptor. The rod includes a coupling portion having a through-hole. The rod further includes a measuring arm connected to the coupling portion and a force applying arm connected to the coupling portion. The measuring arm includes a first extension section having a first indicator portion, and the force applying arm includes a second extension section having a second indicator portion. The force applying arm is elastically deformable away from the measuring arm to displace the second extension section relative to the first extension section. The adaptor is coupled in the through-hole and includes an outer ring and an inner ring. The outer ring is rotatable relative to the inner ring in a single direction.

A method of assembling a surgical instrument is provided. The method comprises connecting a part with a first member, the first member extending between a proximal end and a distal end, the proximal end including at least one mating surface disposed a selected distance from the distal end for engagement with a navigation component, the part having an opening and the distal end being inserted through the opening and translated to a selected position with the first member. Systems, spinal constructs and implants are disclosed.

The cannulated compression device creates fixation and compression across its tang housing, thus stabilizing and closing a bone fracture during placement. After insertion of the cannulated compression device, tangs are extended outward from the tang housing, locking the tang housing with respect to both rotational and axial movement. A compression nut is then threaded onto the proximal end of the tang housing. The nut has two sets of threads: a first set of threads interfaces with the tang housing, a second set of threads interfaces with the bone. By using different pitches, the amount of linear movement for the first set of threads and second set of threads is different.