A variable length headless compression screw insertion system includes a compression screw and a driver assembly for driving the compression screw into a bone. The compression screw has a bone screw and a compression sleeve coupled to the bone screw. The bone screw includes a proximal end having an external threading threadably received in the compression sleeve, and the compression sleeve includes a proximal end having a predefined drive feature and an external threading. The driver assembly includes a sleeve coupler adapted to threadably receive the external threading of the compression sleeve. A ram driver is coupled to the sleeve coupler and has a predetermined length such that its distal end is shaped to contact the proximal end of the bone screw to prevent translation of the bone screw relative to the compression sleeve.

A fusion device assembly for fusion of a joint, including a fusion device, including a distal end, a proximal end, a radially outward facing surface including threading, a bore extending from the proximal end, at least one flute arranged proximate the distal end, and at least one aperture arranged adjacent to the at least one flute, and a reversibly connected hollow drive shaft for insertion of said device which, in a some embodiments, is hollow to allow addition of supplementary bone graft materials or products, should this be desired, without altering the position of the deployed device.

A spinal screw for positioning within bone for use in surgical procedures, the spinal screw having a head and a shaft, the shaft having a proximal end and a distal end. A through-hole extends from the head through the shaft to the distal end of the shaft. The through-hole defines a longitudinal axis of the spinal screw and a spring is positioned within the shaft. A retractable tip element is also positioned within the through hole of the shaft and is operationally coupled to the spring.

An orthopedic screw is provided which includes an outer part having a tip, a head, threads disposed on an outer surface of the outer part between the tip and the head, and a longitudinal cavity with an opening in the head. The orthopedic screw further includes an inner part enclosed by the outer part and is removable from the outer part via the opening of the head. The outer part is made of a material softer than a material of the inner part to ensure shock absorption when the orthopedic screw is in inserted state into a bone of a human body.

A modular head compression screw system is disclosed and has a cannulated compression screw component with a modular head. The compression screw component includes a tubular body and penetrating tip having a first and second end, and an exterior thread on the tubular body which extends to the second end of the tubular body or penetrating tip. A second exterior thread is positioned around the diameter of the first end to create a posted compression screw. Further, a modular head is removably secured at the first end via the second exterior thread and configured to engage with a driver to advance the compression screw in to the bone. Each modular head component may have a threaded head component which removably secures to the first end of the tubular body, and a fixation component which acts to engage tendons and/or bones.

An orthopedic locking screw arranged in a bore of an orthopedic implant enables easy removal of a broken locking screw out of the implant. The orthopedic locking screw for a cooperation with a thread in the orthopedic implant comprises a longitudinally extending shaft. The shaft comprises a thread pattern section extending at least partially along the shaft. The thread pattern section comprises a first thread with a first direction, which is a functional thread configured for the cooperation with the thread in the orthopedic implant. The thread pattern section further comprises a second thread with a second direction opposite to the first direction of the first thread. The second thread is superimposed on the first thread and intersects the first thread. An orthopedic locking system comprises the orthopedic locking screw and the orthopedic implant. The locking screw is manufactured by applying the thread pattern section to the longitudinally extending shaft.

A bone fastener system can comprise a fastener and a first sizing component. The fastener can comprise a shaft that provides an anchoring footprint. The first sizing component can be configured to be connected to the shaft and can include a first anchoring feature, or circumferential bone engaging feature, to increase a size of the anchoring footprint. The first anchoring feature can comprise a sleeve that radially expands a diameter of the threaded shaft. The first anchoring feature can comprise axially extending teeth. The system can further comprise a second sizing component including a second anchoring feature to increase the size of the anchoring footprint, the second anchoring feature being different from the first anchoring feature. The second anchoring feature can expand the diameter of the threaded shaft a greater amount than the first anchoring feature. The second anchoring feature can have a length greater than the first anchoring feature.

A bone fastener includes a screw shaft having a proximal portion and a distal portion. The proximal portion is formed by a first manufacturing method and defines a distal face. The distal portion is formed onto the distal face by a second manufacturing method. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.

A locking system can comprise a screw head without threads and a thread created only inside a bore of a bone plate. The machining of thread geometry can thus pertain to the screw body, while the screw head can be formed by curved surfaces and contact surfaces by simple machining process. A plurality of screws can be implemented, and each bone plate can have a larger number of bores for accepting the screws than the number of screws. The said locking screw can be used with other bone plates having continuous or partial threads created inside their bores.

A locking system can comprise a screw head without threads and a thread created only inside a bore of a bone plate. The machining of thread geometry can thus pertain to the screw body, while the screw head can be formed by curved surfaces and contact surfaces by simple machining process. A plurality of screws can be implemented, and each bone plate can have a larger number of bores for accepting the screws than the number of screws. The said locking screw can be used with other bone plates having continuous or partial threads created inside their bores.