A bone anchor includes a shank having a free end, a longitudinal axis, a channel extending axially through the shank to the free end, the channel having a first width, and at least one opening extending through a wall of the shank, and a narrowing member including an elastically deformable portion configured to extend into the channel at or near the free end. The narrowing member is adjustable from a first configuration where the deformable portion defines an opening with a width smaller than the first width to restrict a substance from exiting through the free end, to a second configuration where the deformable portion is deformed radially outwardly to define an opening with a width that is at least the first width, while at least a portion of the shank positioned at a same axial height as the deformable portion maintains a constant outer width.

Systems and methods for coupling a bone implant to a bone augment material may include coupling a bone augment material to a bone of a patient, forming a helical bone thread in the bone augment material, and coupling a bone implant to the helical bone thread formed in the bone augment material. The bone implant may include a shaft having a proximal end, a distal end, and a longitudinal axis. The bone implant may also include a helical thread disposed about the shaft along the longitudinal axis between the proximal end and the distal end of the shaft and the helical thread may include a concave undercut surface. The helical bone thread formed in the bone augment material may include a convex surface shaped to engage the concave undercut surface of the bone implant to couple the bone implant to the bone augment material.

Methods for bone correction and/or fixation of bone anchors, such as spinal deformity correction. In some implementations, the method may comprise advancing a bone anchor through a proximal bone wall and into a bone. Bone material may be compressed in a region distal of the bone anchor by advancing the bone anchor within the bone to form a compressed bone region, the compressed bone region extending, at least in part, distally of the bone anchor, and in some cases within an inner chamber of the bone anchor. The compressed bone region may increase the fixation strength of the bone anchor within the bone to decrease the chances of the bone anchor becoming dislodged within the bone. In some cases, the compressed bone region may be advanced to and/or compressed against a distal cortical bone to obtain functional bicortical purchase without penetration of the cortical bone.

A bone screw, comprising a proximal end and a distal end spaced from the proximal end in a distal direction along a longitudinal axis of the bone screw and a cannulation extending from the proximal end to the distal end. The bone screw further including a threaded region extending along at least a portion of a length of the screw, the length extending from the proximal end to the distal end. The threaded region defining at least one external thread that extends about the longitudinal axis along a helical path. The threaded region includes at least one flute that extends to the distal end of the bone screw. The at least one flute defines an associated at least one cutting tooth that, in turn, defines a cutting face oriented so as to define an angle with respect to the longitudinal axis. The angle is in the range of about 5 degrees and about 25 degrees, and the flute circumferentially interrupts at least a portion of the external thread.

Various bone screws configured to be implanted into bone and methods of use are provided. In an exemplary embodiment, a bone screw is provided with an elongate shank having at least two threads thereon, and having a distal facing surface with at least two cutting edges. The cutting edges can be configured to cut bone as the bone screw is rotated into bone, thereby forming a path for the threads.

Disclosed are embodiments of medical implants containing an integrated propulsor system. Additionally, methods of insertion are also disclosed.

A “vascular-safe” pedicle screw and extension-ready spinal support system. The pedicle screw includes a self-tapping flute that recessed into a threaded shaft to define terminations of the threads at a face of said self-tapping flute. The terminations are curved to define a convex profile that extends from a root to a crest of the threads at said face of said self-tapping flute. The curved terminations tend to push soft tissue aside as opposed to slicing or tearing through the soft tissue, so that the self-tapping flute is less likely to slice into vascular vessels. The distal portion of the pedicle screw may also include depressions that reduce the circumferential contact area of the pedicle screw in the direction of rotation, which increases the applied pressure to the soft tissue for a given applied rotational force. The increased pressure augments penetration of the pedicle screw through tissue without resort to sharp cutting edges.

A surgical implant includes a tray extending from a first end to a second end along a first plane, the tray including an upper surface and a lower surface, a first post coupled to and extending from the tray away from the first plane and configured to be inserted into a bone portion, the first post including a first opening extending through the first post, a second post coupled to and extending from the tray away from the first plane and configured to be implanted into the bone portion, the second post including a second opening extending through the second post, and a fastener removably coupled to the first post and the second post, the fastener extending from a first fastener end to a second fastener end through the first opening and the second opening.

A retention system includes a first member having an inner surface defining a first thread form. The first thread form includes a first stage having a first pitch and a second stage having a second pitch that is greater than the first pitch. A second member includes a shaft and a neck. The shaft includes an outer surface defining a second thread form configured to engage the first thread form to lock the second member with the first member. The neck includes a smooth unthreaded section. Methods of use are disclosed.

A build plate includes a surface that defines at least one opening configured for disposal of a proximal portion of a screw shaft. The proximal portion is formed by a first manufacturing method and defines a distal face. The proximal portion is connected with the surface in a configuration to orient the distal face for forming a distal portion of the screw shaft thereon by a second manufacturing method that includes an additive manufacturing apparatus. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.