Systems, methods, and devices for securing a spinal rod are provided. A clamp assembly comprises a tulip comprising an opening comprising an inner surface, wherein the inner surface is threaded; and a threaded locking cap disposed in the opening, wherein threads of the locking cap and the inner surface include various geometries.

The present invention relates generally to medical devices and methods generally aimed at spinal surgery. In particular, the disclosed system and associated methods relate to performing spinal fixation with the use of a deformity system.

A receiver assembly for securing an elongate rod to a bone anchor includes a receiver having a channel configured to receive the elongate rod and a helically wound receiver guide and advancement structure formed into interior surfaces of the receiver. The receiver assembly further includes a threaded plug configured for positioning within the channel to secure the elongate rod to the receiver in a locked configuration, with the threaded plug having a lower axially protruding portion configured to compress the rod so as to prevent rotational and axial movement between the rod and the receiver in the locked configuration.

A pivotal spinal fixation system includes bone anchors comprising capture portions having a partial spherical shape with flat side surfaces, multi-planar receivers with continuous interior circumferential engagement surfaces proximate their bottom openings, and uni-planar receivers with non-continuous interior circumferential engagement surface proximate their bottom openings. The system also includes circular retainers, each having a non-continuous outer circumferential surface configured for non-pivotal engagement with the interior circumferential engagement surfaces of both the multi-planar receivers and the uni-planar receivers, and an inner surface configured to expand and contract around the capture portion and flat side surfaces of a bone anchor so as to capture the bone anchor within a multi-planar or uni-planar receiver. The system provides for pivotal motion of the bone anchors in any of a plurality of angular directions relative to the vertical centerline axes of the multi-planar receivers while limiting pivotal motion to a single pivot plane relative to the vertical centerline axes of the uni-planar receivers.

Spinal surgical procedures can benefit from a rod reduction instrument with a ratchet lock-out mechanism. The instrument can include an inner sleeve, a first housing portion, a second housing portion, a plurality of engagement members, and a ratchet mechanism. The inner sleeve can include a threaded proximal portion and a distal end. The first housing portion can be positioned over at least a portion of the inner sleeve. The second housing portion can be positioned proximate to the distal end of the inner sleeve. The plurality of engagement members can be adapted to receive a pedicle screw, and are positionable within the second housing portion. The ratchet mechanism can include an engagement feature to selectively engage the threaded proximal portion of the inner sleeve, and a locking mechanism to selectively lock the engagement feature of the ratchet mechanism against the threaded proximal portion of the inner sleeve.

The present invention relates generally to medical devices and methods generally aimed at spinal surgery. In particular, the disclosed system and associated methods relate to performing spinal fixation with the use of a deformity system.

A surgical instrument enables dispensing of a series of fasteners within a patient's body. The device includes a magazine sized and dimensioned to hold a series of fasteners, the series of fasteners insertable through an opening at the end of the magazine. A splined guide bore is rotatably supported within the magazine, and slidingly supports a shaft having an external surface mateable with the splined guide bore to restrict radial rotation of the shaft with respect to the support about said longitudinal axis. A biasing element is connected between the support and the shaft, to urge the shaft along a longitudinal axis towards a distal end of the instrument. A ratchet is connected to the shaft and engages the magazine to permit sliding of the shaft in a direction for dispensing fasteners only, unless disengaged with the magazine.

A surgical instrument includes a member including a body engageable with a longitudinal element to fix the longitudinal element with the body. The member further includes a distal portion having a guide including an arcuate surface being engageable with the longitudinal element. An actuator is connected with the member to incrementally tension the longitudinal element. Surgical systems, implants, spinal constructs and methods are disclosed.

A pivotal bone anchor assembly includes a shank having a shank head with a partial spherical shape at a proximal end and an anchor portion opposite the shank head for fixation to the bone of a patient. The assembly also includes a receiver having an upper portion defining a channel for receiving an elongate rod and a base defining a cavity in communication with the channel and with a bottom surface of the receiver through a distal opening. The assembly further includes a retainer positionable into non-rotatable and non-pivotal engagement with an inner surface of the cavity prior to the shank head being received within the cavity, with the retainer having a central opening configured to receive and capture the shank head within the cavity while allowing for pivotal motion between the shank and the receiver in at least one plane, and with a lower portion of the retainer extending below the bottom surface of the receiver.

A spinal cross-connector comprises an elongated member, a first connector and a second connector. The first connector and the second connector are configured to receive spinal rods and adaptable to directly attach with pedicle screws. The first connector includes a first collet head, a first clamp and a first locking means. The second connector includes a second collet head, a second clamp and a second locking mans. The first locking means is configured to tighten over a first collet head and engage with the first connector. Similarly, the second locking means is configured to tighten over a second collet head and engage with the second connector. The engagement of the first locking means with the first connector and the second locking means with the second connector locks the spinal cross-connector.