464 results about "Cone pedicle" patented technology

The present invention involves systems and related methods for performing surgical procedures and assessments, including the use of neurophysiology-based monitoring to: (a) determine nerve proximity and nerve direction to surgical instruments employed in accessing a surgical target site; (b) assess the pathology (health or status) of a nerve or nerve root before, during, or after a surgical procedure; and / or (c) assess pedicle integrity before, during or after pedicle screw placement, all in an automated, easy to use, and easy to interpret fashion so as to provide a surgeon-driven system.

A robotic system for performing minimally invasive spinal stabilization, using two screws inserted in oblique trajectories from an inferior vertebra pedicle into the adjacent superior vertebra body. The procedure is less traumatic than such procedures performed using open back surgery, by virtue of the robot used to guide the surgeon along a safe trajectory, avoiding damage to nerves surrounding the vertebrae. The robot arm is advantageous since no access is provided in a minimally invasive procedure for direct viewing of the operation site, and the accuracy required for oblique entry can readily be achieved only using robotic control. This robotic system also obviates the need for a large number of fluoroscope images to check drill insertion position relative to the surrounding nerves. Disc cleaning tools with flexible wire heads are also described. The drilling trajectory is determined by comparing fluoroscope images to preoperative images showing the planned path.

A pedicle screw is provided that includes an upwardly extending collet. The collet may include downwardly extending slots that define deflectable segments therebetween. When a spherical element or other structure, e.g., a non-dynamic stabilizing element, is positioned around the collet, introduction of a set screw causes outward deflection of the upstanding segments into engagement with the spherical element. A snap ring may be interposed between the collet and the spherical element to facilitate positioning therebetween. In an alternative embodiment, a non-slotted collet is employed. In such embodiment, the collet and the spherical element may be threadingly engaged and may include a snap ring therebetween. The pedicle screw subassemblies may be incorporated into a spinal stabilization system which may include a dynamic stabilizing member to provide clinically efficacious results.

A pedicle screw assembly (10) that includes a cannulated pedicle screw (20) having a scalloped shank (24), a swivel top head 30 having inclined female threads (44) in a left and right arm (34, 36) to prevent splaying, a set screw (50) having mating male threads 52, a rod conforming washer (60) that is rotatably coupled to the set screw (50), the conforming washer including reduced ends to induce a coupled rod (80) to bend. A rod reduction system including an inner and an outer cannula (90, 100), the inner cannula (90) including a left and right arm (92, 94) that engage the swivel top head's (30) left and right arm (34, 36) and the outer cannula (100) dimensioned to securely slide over the inner cannula (90) to reduce the rod (80) into the swivel top head's (30) rod receiving area (38).

A spinal intervertebral support implant, for fusion or for dynamic stabilization purposes. A rod, preferably in the form of a screw, is inserted obliquely from the pedicle of an inferior vertebra into the body of a neighboring superior vertebra, through the disc space. The rod can be anchored into the body of the superior vertebra by means of a force fit or a screw thread. A pile of elements is disposed on the rod in the disc space like a pile of washers, so that the compression load between vertebrae is carried partly by these elements. These elements can be inserted through the bore through which the rod was inserted in a tightly folded configuration, and deployed into their washer-like form only when in position in the intervertebral space, such that there is no need for any additional incisions.

A minimally invasive fixation system and method for providing access to a surgical site. The fixation system may include a holding assembly, the holding assembling preferably including a lateral implant holder which may be attached to a pedicle screw and a sleeve positioned in connection with the lateral implant holder to prevent the lateral implant holder from separating from the pedicle screw. The sleeve may further include a tissue protection portion to keep the tissue out of the surgical site. A holding sleeve may be operably connected to the holding assembly and pedicle screw and may be used to insert the pedicle screw into the body. Multiple constructs may be inserted into the body so that a portion of the holding assembly extends from the body and provides access to and visualization of the surgical site. A rod holder may also be used to insert a rod into the head of the screw. The rod may be held by the rod holder so that the rod may be angulated as the rod is inserted into the screw heads. Once the rod is positioned in the screw heads, locking caps and / or set screws may be positioned over the rod and engage the screw heads so that the position of the rod may be fixed with respect to the screws. In some embodiments, a movement mechanism may be used to move the screws relative to each other to compress and / or distract the vertebrae.

Pedicle and non-pedicle based interspinous and lateral spacers have an upper surface configured for engagement with an inferior surface of a fifth lumbar vertebral body, and a lower surface configured for engagement with an outer surface of a sacrum. One configuration includes a component having two opposing upper arms and two opposing lower arms. The spacer component has two ends and a central section, each end of the spacer component being configured for attachment to a respective one of the two opposing upper arms, and the central section of the spacer has a height configured for placement between a spinous process of a fifth lumbar vertebral body and a superior surface of an uppermost spinous process of a sacrum. The ends of the spacer component may be attached to the upper arms using pedicle screws, or may use snap-and-lock or other connectors. The two lower arms may either engage directly with the outer surface of a sacrum on either side of a medial ridge, or may interconnect with a separate component also having two lower arms that engage with the outer surface of a sacrum on either side of a medial ridge. Such arms are preferably bent outwardly and include inward serrations to engage with the outer surface of a sacrum on either side of a medial ridge. Other configurations include a spacer component that engages with a sacral notch.

Anatomic points within the body are projected outside the body through the use of extenders (180, 182, 188). The projected points may then be used for measurement, or to facilitate the selection or configuration of an implant that is positioned proximate the anatomic points using a slotted cannula (143). Such an implant may be a rod (270) for a posterior spinal fusion system. Pedicle screws (140, 142, 148) may be implanted into pedicles of the spine, and may then serve as anchors for the extenders. The extenders (180, 182, 188) may have rod interfaces (214, 216, 218) that receive the rod (270) in a manner that mimics the geometry of the pedicle screws (140, 142, 148) so that the selected or configured contoured rod (270) will properly fit into engagement with the pedicle screws (140, 142, 148).