A condylar fracture fixation system for use with an intramedullary nail includes a longitudinally extending rod having first and second ends, each end having outwardly extending threads or ridges. The rod extends along a first longitudinal axis which extends in a medial-lateral direction in use. A first and second nut is provided each nut having first and second ends. The second end of each nut having an opening formed by a plurality of resilient legs for respectively receiving the first and second ends of the rod. The second end of the first and second nuts include ridges or threads extending into the opening in each nut. The inwardly extending ridges of nuts respectively engaging the outwardly extending threads or ridges of the rod. A flexible washer is connected to the first end of each nut.

A pretensionable locking system, a method for producing a locking system and a medical-technical instrument including a locking system. The locking system (2) includes a locking body (10) with an inner thread (12), and an inner locking body (20) with an outer thread (22). In a pretensioned position, the inner thread lies against the outer thread in a first longitudinal axial direction (80) and is pretensioned against the outer thread. In a locked position, the outer locking body is fixed on the inner locking body by screwing the inner thread onto the outer thread. The outer locking body has a resilient retaining element (14) that projects radially inward, and the inner locking body has a rigid bulge (24) that projects radially outward. In the pretensioned position, the retaining element lies against the bulge in a second longitudinal axial direction (85) that is opposite the first longitudinal axial direction.

A bone screw includes a receiving sleeve having a sleeve wall which forms a seat for a longitudinal support for the surgical connection of adjacent bone screws. The bone screw includes an internal thread. A thread turn of the internal thread has a widened lead-in region on the thread lead-in side.

A bone screw comprising a first end having an engagement contour for engaging with a tool to facilitate insertion or removal of the bone screw, and a blocking element is arranged at a second end thereof. The blocking element is provided with a circumferential outside surface which comprises at least one clamping surface whichwhen viewed in an azimuth plane perpendicular to a longitudinal axis of the bone screwwidens outwardly in a wedge-shaped manner away from the longitudinal axis. The bone plate includes at least one opening which is at least partially delimited by an inside wall having an inner contour for receiving and fixing the blocking element of the bone screw. At least one bone screw and at least one bone plate together form a surgical set.

Implants, instruments, and methods for connecting and/or stabilizing first and second bone portions relative to one another are presented including fasteners and retainers connectable in axial force transmitting relationship and instruments for their installation. In one example a guide is configured to clamp two bone portions together while a fastener is inserted through at least one of the bone portions to engage a retainer.

A method and system for performing bone fusion and/or securing one or more bones, such as adjacent vertebra, are disclosed. The screws include a threaded tip connected to a main shaft and a threaded outer sleeve that rotates relative to the outer shaft until locked down. Independent rotation of the threaded outer sleeve relative to the threaded distal tip allows compression or distraction to modify the gap between the vertebral bodies. The screws are passed from the inferior to superior vertebra or superior to inferior, for example, through a trans-pedicular route to avoid neurological compromise. At the same time, the path of screw insertion is oriented to reach superior or inferior vertebra. An intervertebral cage of the system is configured for lateral expansion from a nearly straight configuration to form a large footprint in the disc space. The screws and cage may be combined for improved fixation with minimal invasiveness.

A bone fixation and repair system for a fracture in a bone includes a bone plate having at least one opening. The system includes at least one elongated flexible element and a fastener assembly configured to fit within the at least one opening. The fastener assembly has a) a fastener and b) a locking cap configured to engage the shaft of the fastener.

A compression force magnifier including a vertical axis through a body and a proximal surface of the body sloped at a predetermined angle relative to the vertical axis. A flat distal surface of the body is disposed opposite the proximal surface. A bore is disposed through the body from the proximal surface through the distal surface. The body is connected to an arm having a connection opening configured to allow connection of the body to a bone plate. The connection opening has a connection axis spaced from the vertical axis.

A skull fixing device includes at least a lower fastening member and a movable retainer assembly. The lower fastening member includes a thread rod having a first coupling section formed in an interior thereof. The movable retainer assembly includes at least an upper fastening member and a nut. The upper fastening member includes a sleeve section in which a first rotation section is formed. The nut is screwed to the threaded rod and has an upper end forming a first positioning section and has an outer surface forming a second rotation section mating the first rotation section. Also disclosed is a surgery tool that includes at least a outer barrel having a lower end forming a second positioning section engageable with the first positioning section and an inner guide rod having a lower end forming a second coupling section engageable with the first coupling section.

An open implant closure structure includes a helically wound guide and advancement structure having at least two helically wound forms thereon providing a multi-start closing mechanism for use between spaced arms of a cooperating open medical implant having mating helically wound structure thereon. Illustrated structures include interlocking flange forms, v-threads, square threads, reverse angle threads and buttress threads and receivers with break-off extensions and cooperating tooling.