A dynamic fixation medical implant includes a longitudinal connecting member assembly having an elongate coil-like outer member and an inner cylindrical core attached to the outer member at only one end thereof. Some assemblies include a second longitudinal connecting member in the form of a rod that is fixed to the inner core and extends outwardly from the assembly. Certain assemblies include a threaded core or threaded inserts that cooperate with a helical slit of the coil-like outer member. Two or more cooperating bone screw assemblies attach to the connecting member assembly. The bone screw assemblies may include upper and lower compression members for affixing to and cradling the coil-like outer member only, allowing relative movement between the outer member and the inner cylindrical core. Press fit or snap-on features attach one end of the coil-like outer member to one end of the inner cylindrical core.

Systems, devices, and associated methods for correcting spinal column deformities that help minimize a number of attachment anchors utilized for correction, facilitate use of straight or contoured rods, and/or help promote a more natural, physiologic motion of the spinal column.

According to some embodiments, the process includes the steps of: a) taking a sagittal preoperative x-ray of the vertebral column of the patient to be treated, extending from the cervical vertebrae to the femoral heads; b) on that x-ray, identifying points on S1, S2, T12 et C7; c) depicting, on the said x-ray, curved segments beginning at the center of the plate of S1 et going to the center of the plate of C7; e) identifying, on that x-ray, the correction(s) to be made to the vertebral column, including the identification of posterior osteotomies to make; f) pivoting portions of said x-ray relative to other portions of that x-ray, according to osteotomies to be made; g) performing, on said x-ray, a displacement of the sagittal curvature segment extending over the vertebral segment to be corrected; h) from a straight vertebral rod (TV), producing the curvature of that rod according to the shape of said sagittal curvature segment in said displacement position.

The present invention discloses single level fusion systems and methods of use. The single level fusion systems include a first fastener, a second fastener, and a connector to secure the first fastener to the second fastener. The method of assembling a single level fusion system including obtaining a first fastener, a second fastener, and a connector, securing the first fastener to the connector, and securing the second fastener to the connector. Methods of using the single level fusion systems are also disclosed.

A bone anchor implant assembly configured for surgical implantation into a bone of a patient. The bone anchor implant assembly includes an elongate rod, a separate shank and head, and a closure mechanism configured as a one-part closure or two-part closure. The one-part closure and two-part closure are configured to be interchangeable with each other for closing a channel of the head and locking the assembly and the elongate rod between arms of the head with the closure mechanism.

A method for locking an elongate rod within a head of a bone anchor implant assembly that is configured for surgical implantation into a bone of a patient. The method includes providing an elongate rod, providing a separate shank and the head, and providing a closure mechanism configured as a one-part closure or two-part closure. The method further includes receiving the elongate rod in the channel and closing the channel with the closure mechanism. The one-part closure and two-part closure are configured to be interchangeable with each other for closing a channel of the head and locking the assembly and the elongate rod between arms of the head with the closure mechanism.

Pedicle-based intradiscal fixation devices, systems, instruments, and methods thereof. A pedicle-based intradiscal implant for stabilizing an inferior vertebra and a superior vertebra may include a bendable rod configured to engage bone, a bone fastener defining a channel for receiving the bendable rod, and a locking cap for securing the bone fastener and the bendable rod. The implant may be positioned through a pedicle of an inferior vertebra and the bendable rod may be deployable into the vertebral body of the inferior vertebra, through the disc space, and into the vertebral body of the superior vertebra to stabilize the spine.

A pivotal bone anchor assembly includes a receiver having a lower portion defining a cavity with a retention structure proximate a lower opening and an upper portion defining a channel, and a shank having a capture portion with a spherical outer surface, an anchor portion opposite the capture portion for fixation to the bone, an internal drive structure opening onto a top end, an upward-facing planar surface surrounding the internal drive structure above the spherical outer surface, and a central bore extending from the internal drive structure down to the bottom of the anchor portion. The assembly also includes a retainer having an outer surface engageable with the retention structure and an inner surface engageable with the spherical outer surface, upon an uploading of the capture portion through the lower opening, so as to capture and hold the capture portion within the cavity with the shank being pivotal with respect to the receiver prior to securing a fixation rod within the channel with a closure.

Apparatus and devices for adding an additional spinal construct in a patient are disclosed. In one arrangement the additional spinal construct extends an existing spinal construct ipsilaterally with an inline rod connector in a minimally invasive or preferably, percutaneous procedure. In another arrangement, the ipsilateral extension of an existing spinal construct uses an offset rod connector for receiving an additional spinal rod that may be placed interiorly or exteriorly of the existing spinal construct.

Devices and methods that allow a rod to be offset in a relatively small amount of space are disclosed herein. In some embodiments, first and second offset rods can be joined by a plate-type connector having a reduced thickness suitable for insertion into a small space, e.g., between adjacent bone anchors. In some embodiments, first and second offset rods can be joined by a curved connector that conforms to adjacent bone anchors and likewise has a reduced thickness.