A reusable surgical implement is provided that is formed of a core positioned within an enclosure. The core is formed of a suitable rigid, and optionally flexible material to enable the implant to conform to the desired use for the implement in a surgical procedure. The material forming the enclosure is also stretchable and flexible to accommodate the configuration and/or any flexing of the core, and is biologically inert to enable the implant to be sterilized after use for use in subsequent surgical procedures while protecting the material forming the core. The enclosure can be molded around the core in separate portions or components using multiple molding steps to form an enclosure with the desired attributes.

A receiver assembly for capturing an elongate rod in a receiver of a bone anchor includes the receiver, a first threaded closure, and a second threaded closure. The receiver includes an upper portion that defines a first channel, interior surfaces that have helically wound thread, and a lower pressure insert that can be positioned within the first channel and has upright arms. Each of the first threaded closure and the second threaded closure have a cylindrical body with an external surface having continuous helically wound thread that can rotatably mate with the helically wound receiver thread. The first threaded closure and the second threaded closure are interchangeable for different locking configurations in the receiver assembly. The first threaded closure has a downward protrusion that can compressively engage the elongate rod. The second threaded closure has a bottom surface that can compressively engage the upright arms of the lower pressure insert.

Devices, systems and methods for use in spinal surgeries. The system may include a fastener system comprising a fastener, a staple, and a locking cap. A cord may extend along the spine and through at least one fastener system. An instrument may be provided for tensioning the cord. The system may, for example, apply fixation on the convexity of the scoliotic vertebrae to limit growth on the convex side and allow unilateral growth on the concave side.

A polyaxial pedicle screw assembly includes a receiver having a channel for receiving a rod and a central bore with a seating surface proximate a bottom opening. The assembly also includes a screw shank having a shank head at a proximal end and an anchor portion at a distal end configured for fixation to the bone, with the shank head having an outer spherical surface with a single common radius and an annular planar top end surface entirely surrounding an internal drive socket formed into a top end of the shank head. The assembly further includes a pressure insert having an upper surface for receiving the rod and a lower surface for engaging the outer spherical surface of the shank head to direct a downwardly-directed force from the rod to the screw shank in a locked configuration. The annular planar top end surface on the shank head remains spaced apart from the lower surface of the insert so as to not directly receive the downwardly-directed force therefrom in the locked configuration.

A pivotal bone anchor assembly includes a shank having a shank head, and a receiver having a first channel for receiving a rod and an axial bore for receiving the shank head, with the axial bore including downwardly-facing abutment surfaces and opposed rotation blocking structures beneath a helically wound thread. The assembly also includes a pressure insert having a second channel and opposite outer projections. The pressure insert is loaded into the axial bore with the second channel in a mal-aligned position relative to the first channel, with subsequent rotation moving the second channel into alignment with the first channel and the opposite outer projections into an overlapping engagement with the downwardly-facing abutment surfaces to inhibit upward movement of the pressure insert. During rotation, the opposite outer projections are initially inhibited from further rotation by engagement with the opposed rotation blocking structures until a force is applied to the pressure insert with the tooling to further rotate the opposite outer projections at least partially past the opposed rotation blocking structures.

A surgical technique for lumbar spondylolysis fracture fixation is provided. An instrumentation set for use in the method is also provided. The set includes an anchor configured to attach to a pedicle of a fractured vertebra, a flexible band configured to attach to the anchor, and a hook configured to hook under a lower lamina of a fractured vertebra and further configured to receive the flexible band. The set also includes an inserter for placing the anchor, and a tensioner device having a distal end configured to hold the hook against the lower lamina, and a proximal end configured to secure the flexible band.