234 results about "Bone Anchors" patented technology

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 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 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.

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.

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.

A receiving component for coupling a rod to a bone anchor is provided, the receiving component comprising: a head receiving portion, which includes a seat (54, 54') for pivotally receiving the interior of a head (3) of a bone anchor (1), the head receiving portion being expandable to allow insertion of the head and compressible to lock the inserted head in the seat; a rod receiving portion, which includes a recess (58) forming a channel, the recess having a bottom (58a) for receiving a rod (100, 101), the recess forming two open legs (59); an expansion limiting member (6) which at least partially surrounds the head receiving portion on the outside of the head receiving portion; wherein when the legs (59) are opened, the head receiving portion is compressed to apply a locking force to the inserted head (3).

An embodiment includes a bone fixation system that includes: a bone anchor having a tapered head with threads thereon; and a plate including a void that includes one of a countersink or a counterbore; wherein: (a) no portion of the void has threads; (b) the void includes an inner wall; and (c) the inner wall includes a protrusion along its perimeter. Other embodiments are described herein.

An endoprostheses may include a bone anchor having a proximal end having an extension configured to be inserted into a residual portion of an amputated bone of a patient. The endoprostheses may also include a non-jointed endoprosthesis body configured to enclosed by soft tissue of the patient and having a proximal end configured to be coupled to a distal end of the bone anchor. The endoprostheses may also include a coupling configured to releasably engage the bone anchor and the non-jointed endoprosthesis body. The coupling may be configured to cooperate with the bone anchor and the non-jointed endoprosthesis body to maintain an axial and rotational arrangement of the non-jointed endoprosthesis body with respect to the bone anchor.

A surgical instrument is connectable to a bone anchor insertion device having a drive shaft that defines a coaxial channel for receiving a needle therethrough. The instrument includes a handle portion configured to be coupled to the drive shaft in a rotationally fixed manner to transmit torque to the drive shaft, a needle holder configured to hold a needle and movable axially relative to the handle portion, an actuator rotatable relative to the handle portion, and a transmission member connectable to the needle holder and movable axially relative to the actuator and comprising a first advancement surface engageable with a second advancement surface of the handle portion to convert rotational movement of the actuator into axial movement of the needle holder relative to the handle portion for axially advancing and retracting a needle held by the needle holder relative to the handle portion.

A single bone anchor assembly is disclosed that can be used across various spinal surgical procedures, reducing manufacturing burden and cost, and providing greater flexibility during surgical procedures. [Solution] The bone anchor assembly disclosed herein includes, among other components, an implantable shank and a receiving member having two spaced arms forming a U-shaped seat for receiving a rod. The bone anchor assembly disclosed herein also provides several features for enhancing capability and usefulness. Examples include features that facilitate better implantation of the shank, better connection of instruments to the anchor, and better performance in repositioning spinal fixation elements such as rods within the receiving member seat.

A spinal stabilization unit (10) comprising: a flexible coupler (20) with a flexible coupler body (22), a range-of-motion limiting mechanism configured to control a certain degree of flexion, compression, and extension of the flexible coupler (20), the range-of-motion limiting mechanism comprising a tapered bushing (90) extending internally from a first end of the flexible coupler body (22) and having a narrowed distal opening (98), and a needle (100) with an elongated body (102) having an enlarged head region (104) and shoulder region (106) extending from a opposite end of the flexible coupler body (22), the needle (100) being configured to be received within the tapered bushing (90) and to cooperate with the bushing (90),to form an expansion and compression stop within the flexible coupler body (22), wherein the enlarged head region (104) of the needle (100) is arranged within the tapered socket (90) and is dimensioned such that the enlarged head region abuts the wall of the narrowed opening (98) when the flexible coupler (20) is extended or bent, and the socket (90) abuts the second end of the flexible coupler (20) when the flexible coupler (20) is compressed; and a pair of arms (30, 40), wherein the arms are located at opposite ends of the flexible coupler (20) for receiving bone anchors (50) to secure the flexible coupler (20) to the bone.

The present disclosure are directed toward an articular assembly configured to be coupled with a bone anchor. The articular assembly may include an articular body having a first end and a second end with an articular surface disposed on or adjacent to the first end. The articular body may include a bone anchor interface disposed between the first end and the second end of the articular body. The bone anchor interface may include a channel formed in a circumferential surface of the articular body, a locking member disposed in the channel, and / or a deflectable portion disposed between the locking member and the second end of the articular body.

Disclosed herein are power modules and methods for insertion of a cannulated bone anchor and a stylet. Power modules disclosed herein are configured to adjustably control insertion of a bone anchor and a stylet under power from a motor. In certain embodiments, the motor may be included in a power hand piece. The power modules disclosed herein may be further configured to releasably couple a power hand piece to a driver for insertion of the bone anchor and stylet into the bone of a subject.

The disclosure relates to a bone tracker set (1) for a bone tracking system (100) for tracking, preferably further for registering, at least two bones relative to one another, comprising: at least two bone fixations, in particular two pins (2), which are provided and adapted to be fastened directly to or in a bone of a patient (P) by means of a distal bone anchor (4), wherein a proximal end section (6) of the bone fixation, in particular of the pin (2), in each case has a coupling section (8), and at least two reference adapters, in particular two sleeves (10), which have or carry a proximal optical reference marker (12), and the reference adapters, in particular sleeves (10), are adapted to be able to be coupled to or uncoupled from the coupling section (8) of the bone fixation, in particular of the pin (2), without the need for tools, in particular having a counter-coupling structure (14).In addition, the present disclosure relates to a bone tracking system according to the independent claim.

A coupling device includes a receiving part having a head receiving portion for pivotably receiving a head of a bone anchor and a rod receiving portion defining a recess for receiving the rod, the rod receiving portion having an engagement structure for engaging a locking member to lock the rod in the recess and a first engagement surface different from the engagement structure for engaging an instrument, wherein the first engagement surface is formed away from radially outwardly facing regions of the rod receiving portion, and a locking ring positionable around the head receiving portion and having a second engagement surface for engaging the instrument. The locking ring can assume an insertion position where the head of the bone anchor is insertable into the head receiving portion, and a pre-locking position where the head is prevented from removal from the head receiving portion.