295 results about "Bone Anchors" patented technology

A personalized fixation system includes a surgical planning software tool configured to adjust relationships of relevant anatomy of a subject, at least one bone anchor, a plate having a shape that does not conform to a single plane, the plate configured to accept the at least one bone anchor, wherein the shape of the plate is at least partially determined by the surgical planning software tool, and wherein the plate includes at least one node having a hole configured to receive the at least one bone anchor, and a locking element configured to connect the at least one bone anchor to the plate, wherein the plate is manufactured using additive manufacturing.

An orthopedic fixation device operable for securing bone parts comprising one or more blocking cams integrated into a structural support device such as an intervertebral spacer or a fixation plate. The blocking cam is irremovable from the structural support device without destruction of the blocking cam or the structural support device or both. In preferred embodiments, the blocking cam comprises a central body with one or more tabs extending radially from the central body. The blocking cam is rotatable between a locked mode wherein one of the tabs obstructs removal of a bone anchor from a fixator port of the structural support device and an unlocked mode wherein the bone anchor is unobstructed from removal from a fixator port.

Bone anchor assemblies are disclosed herein that provide for a single bone anchor assembly that can be utilized across a range of spinal surgical procedures, reduce manufacturing burden and cost, and provide for greater flexibility during a surgical procedure. The bone anchor assemblies disclosed herein include an implantable shank and a receiver member having two spaced apart arms which form a U-shaped seat to receive a rod, among other components. The bone anchor assemblies disclosed herein also provide a number of features to enhance capability and usability. Examples include features to facilitate better implantation of the shank, better coupling of instrumentation to the anchor, better performance in reducing a spinal fixation element, such as a rod, into the receiver member seat, and others.

A personalized fixation system includes a surgical planning software tool configured to adjust relationships of relevant anatomy of a subject, at least one bone anchor, a plate having a shape that does not conform to a single plane, the plate configured to accept the at least one bone anchor, wherein the shape of the plate is at least partially determined by the surgical planning software tool, and wherein the plate includes at least one node having a hole configured to receive the at least one bone anchor, and a locking element configured to connect the at least one bone anchor to the plate, wherein the plate is manufactured using additive manufacturing.

A bone anchoring surgical system comprising a bone anchoring device comprising a bone anchor body configured to anchor a bone; and a deformable structure associated with the bone anchor body and located distally or proximally to the bone anchor body, the deformable structure configured to expand following deployment thereof in a target inner body skeleton position.

A spinal fixation system includes a plurality of bone anchors, each having an anchor portion and a shank head with an upper spherical surface having a first diameter extending downward to an inner edge of an annular shelf spaced below a hemisphere plane, and a lower spherical surface having a second diameter greater than the first diameter extending downward from an outer edge of the annular shelf toward a neck extending between the shank head and anchor portion. The system also includes both pivoting and non-pivoting receiver sub-assemblies, with each receiver sub-assembly including a receiver having a central bore with a seating surface adjacent a bottom opening and a channel for receiving a rod. Each receiver sub-assembly also includes one of a multiplanar retaining structure, a monoplanar retaining structure, or a monoaxial retaining structure positioned therein and slidably engageable with the seating surface after capturing the shank head upon its uploading through the bottom opening.

A uniplanar bone anchor including a housing and a bone screw is provided. The lower region of the housing defines mating elements that mate with engaging elements on the bone screw to limit movement of the housing relative to the bone screw to a single plane.

A coupling assembly for coupling a rod to a bone anchoring element, including a receiving part having first and second ends, a recess at the first end for the rod, and an accommodation space for a head of the bone anchoring element, the accommodation space having an opening at the second end to permit insertion of the head into the receiving part, a retainer element configured to be arranged at least partially in the accommodation space and to hold at least part of the head, and a spring element configured to be arranged at least partially in the accommodation space and to be compressed in an axial direction. The retainer element and the spring element are separate parts. When the retainer element and the spring element are in the accommodation space of the receiving part in a first position, the spring element extends into the recess of the receiving part.

A coupling assembly for coupling a rod to a bone anchoring element, including a receiving part having first and second ends, a recess at the first end for the rod, and an accommodation space for a head of the bone anchoring element, the accommodation space having an opening at the second end to permit insertion of the head into the receiving part, a retainer element configured to be arranged at least partially in the accommodation space and to hold at least part of the head, and a spring element configured to be arranged at least partially in the accommodation space and to be compressed in an axial direction. The retainer element and the spring element are separate parts. When the retainer element and the spring element are in the accommodation space of the receiving part in a first position, the spring element extends into the recess of the receiving part.

A coupling device for coupling a rod to a first bone anchor (1) of a first type or a second bone anchor (1 ') of a second type is provided, the coupling device (10) comprising: a receiving part (5), a locking member (6), the head being pivotable in a first position, the head being locked in the accommodation space (54) in a second position; wherein the head receiving portion (52) comprises a constraining structure (150) by means of which the coupling device is configured to cooperate with the first bone anchor (1) such that the first bone anchor (1) is configured to pivot in a single plane relative to the central axis (C), or to cooperate with the second bone anchor (1 ') such that the second bone anchor (1') is configured to pivot in a single plane relative to the central axis (C). The second bone anchor (1 ') is configured such that when the locking member (6) is in the first position, the second bone anchor (1') is configured to pivot in a plurality of planes relative to the pivot axis (C).

A bone anchor and system for applying tension via a tether or cord between bone anchors is provided. An illustrative bone anchor includes a screw having a head and a shank, where the shank defines a screw axis. The bone anchor further includes a connector attachable to the head of the screw, where the connector is configured to receive and secure a cord to the bone anchor.

A pivotal bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver, with the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The assembly also includes a downloadable compression insert with a side arm extension for engagement and compression by a vertically-translating insert side compressing member so as to lock the assembly independent of the closure top.

A pivotal bone anchor assembly includes a first member having a central bore, a lower portion with a bottom opening, and a pair of upright arms defining an open channel and including upper tool engagement structures configured for engagement and holding by tooling. The assembly also includes a shank comprising an anchor portion for fixation to the bone of a patient and a head portion for uploading into the lower portion of the first member through the bottom opening. The assembly further includes a second member cooperating with the first member and having a center aperture alignable with the central bore, lower tool engagement structures, and an upwardly-facing surface engageable with a rod. The second member is downwardly displaceable relative to the first member by the tooling from a first position to a second position, so as to lock an angular position of the shank relative to the first member in a locked configuration prior to securing the rod in the open channel with a closure.

A modular bone plate includes a first plate member including a first connection portion having a first hole and a second plate member including a second connection portion having a second hole. The first plate member is connectable to the second plate member when the first plate member and the second plate member are arranged such that the first hole and the second hole overlap. The modular bone plate also includes a connector member that is insertable into the first hole and the second hole when the first hole and the second hole overlap such as to connect the first plate member and the second plate member. The connector member includes a passage that is configured to accommodate a portion of a bone anchor therein.

Bone fixation systems for use with fractured bones having at least one fragment are disclosed, along with kits and systems containing same, as well as methods of production and use thereof. The bone fixation systems include a bone anchor that matingly engages with an opening in a bone plate and that has a cannula extending through at least a portion of the bone anchor. The bone fixation systems also include at least one elongated member that is configured and adapted to extend between the interior of the bone anchor and an outer surface of the bone to embrace and / or anchor the at least one bone fragment in place against the remainder of the fractured bone.

A pedicle screw tulip head extender. The extender can include a mounting bar sized to fit and be secured into a pedicle screw tulip head of a fixed pedicle screw, the mounting bar having a central axis. An extender tulip head is disposed on an upturned end of the mounting bar, the extender tulip head having two opposing arms, each one of the two opposing arms including a portion of interior threads and extending from a curved lower surface defining a substantially U-shaped interior channel that can have a first channel axis disposed at a second elevation above the first elevation.

The present invention is directed an anchor assembly for use in spinal fixation to interconnect a longitudinal spinal rod with a patient's vertebra. The anchor assembly preferably includes a bone anchor, a body with a rod-receiving channel, an insert member (preferably a bushing), and a locking cap with a saddle. The anchor assembly preferably enables in-situ assembly where the bone anchor may be secured to the patient's vertebra prior to being received within the body of the bone anchor assembly. Accordingly, the anchor assembly enables a surgeon to implant the bone anchor without the body to maximize visibility and access around the anchoring site. Once the bone anchor has been secured to the patient's vertebra, the body may be snapped onto the bone anchor and a spinal rod may be inserted into the rod-receiving channel.

A method for facilitating stabilization of a sacroiliac joint is provided. The method includes surgical and stabilization techniques for implanting bone anchors or fasteners such as a first bone screw, a second bone screw, and third bone screw in a pelvis traversing portions of a coxal bone and a sacrum, and extending through or adjacent at least a portion of a corresponding sacroiliac joint. The bone anchors or fasteners such as the first bone screw, the second bone screw, and the third bone screw can be inserted at different angles and locations to form a lattice structure that serves in securing the position of a coxal bone and a sacrum relative to one another to facilitate stabilization across a corresponding sacroiliac joint.

A spinal fixation system includes a plurality of receiver sub-assemblies and bone anchors with shank heads, with each receiver sub-assembly including a receiver having a channel for receiving a rod and a base defining a cavity in communication with the channel to define a central bore. Each receiver sub-assembly also includes a retaining structure positionable in the cavity for frictionally engaging and articulating with an upper partial spherical surface of a shank head. Each receiver sub-assembly further includes an insert sub-assembly positionable within the central bore above the retaining structure, with the insert sub-assembly including a support collar with outer surfaces for engaging interior surfaces of the central bore, a load saddle supported by the support collar with an upper surface for engaging the elongate rod, and a clamp positioner also supported by the support collar with curvate inner surfaces for engaging the retaining structure before and after it frictionally engages the shank head.

A system for coupling a rod to bone includes different first and second bone anchors and a coupling device including a receiving part with a rod receiving portion for receiving a rod and a head receiving portion for interchangeably accommodating a head of either the first or second bone anchors, and a locking member positionable at least partially around the head receiving portion and movable between a first position where the held head is movable relative to the receiving part and a second position where the held head is locked relative to the receiving part. The coupling device includes a restraining surface configured to restrict pivoting of the first bone anchor relative to the receiving part, while the coupling device is configured to restrict pivoting of the second bone anchor relative to the receiving part differently than the restricted pivoting of the first bone anchor relative to the receiving part.

A system for coupling a rod to bone includes first and second bone anchors that are different from one another and a coupling device including a receiving part with a central axis and a head receiving portion for interchangeably receiving a head of either the first or second bone anchors, and a pressure member configured to exert pressure on the head of either the first or second bone anchors when the head is in the receiving part to clamp the inserted head at a particular position relative to the receiving part. The coupling device includes a restraining surface configured to cooperate with the first bone anchor to restrict pivoting of the first bone anchor to a single plane. The coupling device is configured to cooperate with the second bone anchor to restrict pivoting of the second bone anchor differently than the restricted pivoting of the first bone anchor.

An anchoring member for a polyaxial bone anchoring device includes a bone anchoring section having a first end, a second end, and a bone engagement structure, a head having an outer surface portion that defines a segment of a sphere, wherein a central axis extends through the head and the first and second ends of the bone anchoring section, and a neck extending between the first end of the bone anchoring section and the head. The neck has a first portion and a second portion between the first portion and the bone anchoring section. In at least a first cross-sectional plane including the central axis, the first portion of the neck is concave with a first curvature, and the second portion of the neck is concave with a second curvature that is less curved than the first curvature.

A pivotal bone anchor assembly includes a receiver having a cavity with a bottom opening and a first channel for receiving a rod, and a shank having a head positionable into the cavity with the shank extending downward through the bottom opening. The assembly also includes an insert positionable into the central bore above the shank head and having a second channel alignable with the first channel, opposite extensions extending outwardly in the direction of the channels to block rotation between the insert and the receiver, and upward-facing surfaces located laterally outward from and on each side of the second open channel. The upward-facing surfaces are configured for releasable compressive engagement by a compressing tool after the elongate rod is received within the channels and prior to a final locking of the assembly so as to provisionally lock the shank from pivoting with respect to the receiver.

A coupling device for coupling a rod to a bone anchor includes a receiving part configured to receive a head of the bone anchor, the receiving part having a first end and a second end, a central axis that extends between the first and second ends, and two legs at the first end that define a recess extending in a longitudinal direction transverse to the central axis for receiving the rod, and a monolithic pressure member positionable in the receiving part, the pressure member including a rod support surface and an engagement portion to adjust the pressure member to exert pressure on the head. The engagement portion is positioned farther radially from the central axis in the longitudinal direction than a first portion of the rod support surface, and extends closer axially to the first end of the receiving part than the entire first portion of the rod support surface.

Disclosed herein are ratchet retracting handles and related methods for automatically retracting a stylet during insertion of a bone anchor.

Pedicle bone anchor implants, assemblies, and methods thereof. The implant may include an expandable anchor having a body with expandable sections separated by one or more expansion joints, a plurality of expandable teeth, or an expandable head. The expandable anchor has a collapsed configuration and an expanded configuration, thereby creating a press-fit in adjacent bone.

An implantation tool and associated methods for placement of a bone anchor. The implantation tool includes a housing with a handle and a trigger, an anchor tube extending from the housing, an upper slide moveably positioned in the housing, the upper slide including a cartridge opening having a ledge therein, the upper slide moveable between a delivery position and a retracted position, a magazine holding a plurality of cartridges holding anchors therein for implantation, wherein the magazine is centrally located relative to the housing and / or defines positions for holding the cartridge.

Bone anchor for an upper or lower jaw and a corresponding drilling template for making drill holes in the jaw. The drilling template contains an anchor plate and a connecting element whose shape and dimensions are substantially the same as those of the anchor plate and the connecting element of the bone anchor. A drill guide is provided adjacent to recesses on the drilling template that allows a drill to be appropriately guided in order to make drill holes in the jaw.