Abstract: A coating layer, for example PEEK or titanium foil, shields a bone implant surface from wearing interactions with surfaces of bone and/or other implants. The coating prevents shedding particles which are difficult to distinguish from evidence of potentially dangerous conditions, for example, microorganism contamination and/or degenerating tissue. Methods and structures for securing a coating layer are described. Other uses and implementations of coating layers are described.

Abstract: A pedicle screw implant construct kit, comprising at least one pedicle screw, at least one collar comprising a recess for receiving a rod, the collar configured to be coupled to a head of the pedicle screw, an elongated rod for connecting the collar to one more additional collars to couple between the pedicle screw and one or more additional screws, and a locking ring sized to be positioned over at least a distal portion of the collar to restrain relative movement of the screw head and rod by exerting radial compression force onto the collar. In some embodiments, the components of the kit are comprised of carbon reinforced composite material, optionally with no radiation blocking material. In some exemplary embodiments of the invention, the kit includes two locking rings on a collar, optionally both below the rod.

Abstract: Composite material screws and construction techniques are described comprising reinforcing fibers directed in different winding directions and/or angles at different layers (radial depths) of the screw. Optionally, the screw comprises composite material layers wound with fibers at both the pitch of the thread of the screw and at a steeper pitch (for example, about 45°). Optionally, an outer layer of the screw comprises a relative radiolucent construction and/or material, with a more radiopaque construction and/or material positioned underneath the outer layer such that at least a portion of the screw outline is delineated by a radioimaging technique (for example, fluoroscopy, CT, or MRI), while maintaining a sufficiently artifact-free image around the screw that the image characteristics of the surrounding tissue are still determinable.

Abstract: Fiber-reinforced polymer matrix composite material bone screws having threads surfaced with a metallic layer are described. In some embodiments, the metallic layer comprises a plurality of anchors placed to engage with the composite material and resist shearing when the bone screw is inserted or removed.

Abstract: A pedicle screw implant construct kit, comprising at least one pedicle screw, at least one collar comprising a recess for receiving a rod, the collar configured to be coupled to a head of the pedicle screw, an elongated rod for connecting the collar to one more additional collars to couple between the pedicle screw and one or more additional screws, and a locking ring sized to be positioned over at least a distal portion of the collar to restrain relative movement of the screw head and rod by exerting radial compression force onto the collar. In some embodiments, the components of the kit are comprised of carbon reinforced composite material, optionally with no radiation blocking material. In some exemplary embodiments of the invention, the kit includes two locking rings on a collar, optionally both below the rod.

Abstract: Fiber-reinforced polymer matrix composite material bone screws having threads surfaced with a metallic layer are described. In some embodiments, the metallic layer comprises a plurality of anchors placed to engage with the composite material and resist shearing when the bone screw is inserted or removed.

Abstract: According to some embodiments of the invention there is provided a composite material bone screw comprising: a screw core comprising straight reinforcing fibers arranged along a longitudinal axis of the screw; a winding screw thread surrounding at least a portion of the screw core; a layer intermediate the screw core and the screw thread, the layer comprising reinforcing fibers helically wound in an opposite direction to a winding direction of the screw thread.

Abstract: A coating layer, for example PEEK or titanium foil, shields a bone implant surface from wearing interactions with surfaces of bone and/or other implants. The coating prevents shedding particles which are difficult to distinguish from evidence of potentially dangerous conditions, for example, microorganism contamination and/or degenerating tissue. Methods and structures for securing a coating layer are described. Other uses and implementations of coating layers are described.

Abstract: A pedicle screw implant construct kit, comprising at least one pedicle screw, at least one collar comprising a recess for receiving a rod, the collar configured to be coupled to a head of the pedicle screw, an elongated rod for connecting the collar to one more additional collars to couple between the pedicle screw and one or more additional screws, and a locking ring sized to be positioned over at least a distal portion of the collar to restrain relative movement of the screw head and rod by exerting radial compression force onto the collar. In some embodiments, the components of the kit are comprised of carbon reinforced composite material.

Abstract: A pedicle screw implant construct kit, comprising at least one pedicle screw, at least one collar comprising a recess for receiving a rod, the collar configured to be coupled to a head of the pedicle screw, an elongated rod for connecting the collar to one more additional collars to couple between the pedicle screw and one or more additional screws, and a locking ring sized to be positioned over at least a distal portion of the collar to restrain relative movement of the screw head and rod by exerting radial compression force onto the collar. In some embodiments, the components of the kit are comprised of carbon reinforced composite material.

Abstract: According to some embodiments of the invention there is provided a composite material bone screw comprising: a screw core comprising straight reinforcing fibers arranged along a longitudinal axis of the screw; a winding screw thread surrounding at least a portion of the screw core; a layer intermediate the screw core and the screw thread, the layer comprising reinforcing fibers helically wound in an opposite direction to a winding direction of the screw thread.

Abstract: A pedicle screw implant construct kit, comprising at least one pedicle screw, at least one collar comprising a recess for receiving a rod, the collar configured to be coupled to a head of the pedicle screw, an elongated rod for connecting the collar to one more additional collars to couple between the pedicle screw and one or more additional screws, and a locking ring sized to be positioned over at least a distal portion of the collar to restrain relative movement of the screw head and rod by exerting radial compression force onto the collar. In some embodiments, the components of the kit are comprised of carbon reinforced composite material.