An electrical stimulation anchor is configured to be electrically coupled to a power source, such as a transducer, that is external to the electrical stimulation anchor. The electrical stimulation anchor can include a bone anchor that is configured to be secured to a bone. The bone anchor can define a first electrode, a second electrode, and an isolating portion between the first electrode and the second electrode. The electrical stimulation anchor can further include a connection unit attached to the bone anchor. The connection unit can define a first contact member that electrically connects to the first electrode, and a second contact member electrically isolated from the first contact member. The second contact member can be electrically connected to the second electrode. The first and second contact members are configured to draw electrical current from the transducer so as to establish a voltage differential between the first and second electrodes.

Disclosed herein are power modules and methods for insertion of a cannulated bone anchor and a stylet. Power modules disclosed herein are configured to adjustably control insertion of a bone anchor and a stylet under power from a motor. In certain embodiments, the motor may be included in a power hand piece. The power modules disclosed herein may be further configured to releasably couple a power hand piece to a driver for insertion of the bone anchor and stylet into the bone of a subject.

In some embodiments, a bone implant for percutaneous use is provided. The bone implant comprises a head, a body adjacent to the head and a tip opposite the head. At least the head, body or tip is configured to contact bone. An expandable member contacts at least one of the head, tip or body and is movable from an unexpanded configuration to an expanded configuration when deployed at a bone implant site. In some embodiments, a system for percutaneous bone harvesting is provided.

A system includes a bone anchor including a shank having a first end, a second end, a channel extending through the shank with a channel axis, and an internal advancement structure having at least a portion being closer axially to the second end than to the first end, and an elongate instrument configured to extend through the channel, with a tip portion and an external advancement structure configured to cooperate with the internal advancement structure. Engagement between the advancement structures facilitates holding of the tip portion at a first axial position relative to the bone anchor and movement of the tip portion from the first axial position towards both the first and second ends of the shank. The tip portion and the external advancement structure of the elongate instrument are insertable into and removable from the channel via the first end of the shank.

A subtalar arthroereisis screw may have a head and a body with a distal tip, a shank extending from the head to the distal tip, and a screw thread extending along the shank. The shank may have a leading end proximate the distal tip and a trailing end proximate the head. The screw thread may be continuously variable between a first pitch relatively closer to the trailing end, and a second pitch, larger than the first pitch, relatively closer to the leading end. The head may have a receiving end that is connectable to a tool to facilitate rotation of the head with the tool during implantation of the subtalar arthroereisis screw. The screw thread may taper continuously from a first major diameter at the trailing end, to a second major diameter, smaller than the first major diameter, and may have a plurality of notches distributed along its length.

A fixation assembly includes a tapered cannula, a post, and a snap ring. The snap ring is attachable to the post and the tapered cannula. The snap ring is configured to maintain the tapered cannula axially fixed in relation to the post such that the tapered cannula and the post are rotatable relative to each other.

The present invention relates to a device and system for surgical fixation of small bones, small bone fragments, and osteotomies and more particularly to compression screw having a threaded leading portion which is joined to a section that is free from threads, and which includes an angle or from 12° to 25° in a plane through the longitudinal axis of the screw and a portion which is joined to a head having a configuration that is intended to provide anti-rotational stability and compression through the device.

Disclosed herein is a “condensing screw for an implant procedure.” A “condensing screw for an implant procedure” of the present invention is provided with: a screw main body which is inserted into an implant planting hole formed by an pilot drilling process, enlarges the implant planting hole to a size large enough to insert an implant fixture, and forms osseodensification regions on the side surfaces and the inside of the implant planting hole; and a shank which extends upward from the screw main body, is coupled to a driving unit, and transmits the torque of the driving unit to the screw main body. The condensing screw can enlarge the implant planting hole and perform the osseodensification process simultaneously, and can be used for maxillary sinus augmentation.

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.

Implants, devices, systems, and methods for achieving ligament fixation are disclosed. An implant is disclosed that includes a head member, a breakaway portion, and an anchor member. The anchor member may be coupled to the head member by the breakaway portion. The implant may be designed to fail in fatigue at the breakaway portion. The breakaway portion may thereby extend between a first end of the anchor member and a second end of the head member. The breakaway portion may comprise a circumferential groove. The groove may be configured to concentrate stress forces in situ such that a fatigue failure/fracture occurs at the groove. Insertion instruments for inserting an implant for ligament fixation are also disclosed. Methods of using an implant for achieving ligament fixation are also disclosed.