A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The upper portion expands a retaining member in the receiver cavity to capture the shank upper portion in the receiver. In some embodiment either the retaining member or an insert provide for a friction fit of the shank upper portion in the receiver resulting in non-floppy placement of the shank with respect to the receiver. Some retainers and inserts have a lock-and-release feature. Final locking of the polyaxial mechanism is provided by frictional engagement between the shank upper portion and the retaining member. A pre-assembled receiver, retaining member and optional insert may be popped-on or snapped-on to the shank upper portion prior to or after implantation of the shank into a vertebra.

A bone anchor assembly comprising a shank, receiver, pressure insert, sleeve and closure. The sleeve having a body constructed of deformable material and including a transfer of non deformable material molded into the body of the sleeve to transfer force around the body. The receiver having interior guides and the insert having guide followers that cooperate to align the insert in the receiver and prevent rotation of the insert in the receiver.

A reusable surgical implement is provided that is formed of a core positioned within an enclosure. The core is formed of a suitable flexible material to enable the implement, which can be any suitable device such as a reusable surgical trial implant, rod template or flex driver, among others, to be bent to conform to the desired shape for an actual implant to be placed in the location of the implement. The material forming the enclosure is also flexible to accommodate the flexing of the core, and is biologically inert to enable the implement to be sterilized after use for use in subsequent surgical procedures.

A pivotal bone anchor assembly includes a receiver with an upper channel for receiving a rod and a central bore extending downward through the channel having a support surface adjacent a bottom opening, a guide and advancement structure adjacent the top of the receiver, and a downward-facing surface below the guide and advancement structure. The assembly also includes a shank with a head portion pivotably supported by the support surface with the shank extending downwardly through the bottom opening, and an insert with a lower surface engageable with the head portion of the shank, an insert channel for receiving the rod, an upward-facing surface located radially outward from the insert channel, and one or more slots configured to make the insert resiliently axially compressible when the upward-facing surface of the insert abuts the downward-facing surface of the central bore to apply a downwardly directed pressure against the head portion of the shank.

A dynamic longitudinal connecting member assembly includes an anchor member having an integral or otherwise fixed elongate core of circular or non-circular cross-section. The core is pre-tensioned and extends through at least one elastic spacer and at least one outer sleeve. The anchor member and the outer sleeve each attach to at least one bone anchor. In operation, the core is held in tension by the spacer.

Embodiments herein are generally directed to extendable rods for use in orthopedic assemblies. In some embodiments, these implants may be used in conjunction with procedures to treat spinal deformities, including, but not limited to, early onset scoliosis.

A tool set for implanting a rod in a human spine in conjunction with bone screws.

A tool set for implanting bone screws in a human spine, followed by the implantation of a longitudinal connecting member into the bone screws includes a pair of independently mountable and manipulatable elongate guide tools that form a unitary tool guide when desired. Each guide tool includes attachment structure for independent operable connection of the guide tool to an arm of the bone screw. The bone screw/guide tool attachment includes an undercut and/or recess so as to resist separation of the guide tool member from an attached bone screw. Further tools include a removable stabilizer, a cooperating bone screw driver with an attached stabilizer, a closure starter/reduction tool, a closure driver and a counter torque tool.

A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert has a lower friction fit collet and an outer receiver press fit surface. A down-loadable retaining ring has at least one inner edge and outer tiered surfaces. The ring cooperates with the shank to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled. A uni-planar assembly is included.

A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The receiver can have crimp tabs, but is devoid of spring tabs and collet-like flexible structures. A down-loadable compression insert (some with lock and release feature), a down-loadable friction fit split retaining ring and an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled. The receiver and insert include aligned tool receiving apertures for lock and release of the polyaxial mechanism.