155 results about "Bone Anchors" patented technology

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 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 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 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.

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.

In one example, a system has an insertion handle couplable to an intramedullary nail and including a first coupler defining one of a recess and a protrusion and one of a latch and an abutment surface. The system has an aiming guide including a guide body defining at least one alignment aperture therethrough. The aiming guide includes a second coupler couplable to the first coupler such that the at least one alignment aperture is positioned to direct an instrument toward at least one bone anchor fixation hole of the intramedullary nail. The second coupler defines the other of the recess and the protrusion and the other of the latch and the abutment surface. The first coupler and the second coupler are couplable to one another by receiving the protrusion in the recess and by engaging the latch with the abutment surface.

An instrument for use in surgery includes a hollow shaft connectable to a drive shaft of a bone anchor insertion device in a rotationally fixed manner, a needle holder configured to hold a needle and movable axially relative to the hollow shaft, an actuator rotatable relative to the hollow shaft, and a transmission member connectable to the needle holder and movable axially relative to the actuator. The transmission member is positionable around at least part of the hollow shaft and includes a first advancement surface engageable with a second advancement surface of the hollow shaft to convert a rotational movement of the actuator into axial movement of the needle holder relative to the hollow shaft for axially advancing and retracting the needle held by the needle holder.

A bone anchoring device includes a bone anchoring element, a receiving part having an accommodation space for pivotably accommodating a head of the bone anchoring element, a pressure element movable in the receiving part to engage and exert pressure on the head to clamp the head at an angular position relative to the receiving part, and at least one restraining element separate from the pressure element and positionable in the receiving part. The pressure element defines at least one opening that provides access laterally through the pressure element to the head in the receiving part. The restraining element is movable relative to the pressure element to engage the head laterally through the opening of the pressure element to restrict the pivoting of the head in at least one radial direction while the head remains pivotable in at least one other radial direction.

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 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 humeral head assembly is provided that includes an articular body and a coupler. The articular body includes a coupling portion disposed on a side of the articular body opposite an articular surface. The coupling portion includes a continuous zone of eccentricity adjustment. The coupler portion optionally includes one or more than one discrete position site. The coupler includes a first portion and a second portion opposite the first portion. The first portion is configured to mate with the coupling portion and the second portion is configured to mate with another member of a joint prosthesis. A coupling portion with the continuous range of eccentricity adjustment can be provided on a bone anchor and the eccentricity of another component can be selected by motion of a coupler, such as a tray for reverse humeral assemblies, along the coupling portion of the anchor.

A method for manufacturing at least one bone anchor and a corresponding drilling template, wherein the bone anchor has an anchor plate which is to be fixed to the surface of a bone by means of one or several screws having a screw head. The anchor plate thus has a bone side which is to connect to the surface of the bone and a free side which is opposite to said bone side. Further, a method for manufacturing a drilling template is described, making it possible to make bore holes in the bone at predetermined positions and to screw the bone anchor to the bone according to predetermined orientations.

An instrument for use with a bone anchoring device including a bone anchoring element and a receiving part for coupling a rod to the bone anchoring element, wherein the instrument includes at least one tube having a first end, a second end, and a longitudinal axis extending between the first and second ends, and including an engagement surface at the first end engageable with the bone anchoring device, and an alignment member configured to facilitate connecting of the tube to the bone anchoring device. The alignment member is rotatable relative to the tube from a first position where the tube is connectable and separable from the bone anchoring device to a second position where the tube is restricted from being separated from the bone anchoring device.

A drill guide fixture may be configured to prepare a skull for attachment of a cranial insertion fixture. The drill guide fixture may include a central drill guide and a bone anchor guide at a base of the drill guide fixture. The central drill guide may define a central drill guide hole therethrough, wherein the central drill guide hole has a first opening at a base of the drill guide fixture and a second opening spaced apart from the base of the drill guide fixture. The bone anchor drill guide may define a bone anchor drill guide hole therethrough, and the bone anchor drill guide hole may be offset from the central drill guide hole in a direction that is perpendicular with respect to a direction of the central drill guide hole. Related cranial insertion fixtures, robotic systems, and methods are also discussed.

Intramedullary nails, systems, and methods. The intramedullary nail may include a generally elongate body extending from a first, distal end to a second, proximal end. The distal end may include one or more openings configured to receive one or more bone anchors that extend transversely through the distal end intramedullary nail, and thereby configured to secure the distal end of the nail. The proximal end may also include one or more openings configured to receive one or more bone anchors that extend transversely through the proximal end of the intramedullary nail, and thereby configured to secure the proximal end of the nail. In some embodiments, the proximal end may further include a cross-locking feature, which includes a second bone anchor that interlocks with a first bone anchor, for example, for enhanced bone purchase and bony fixation.

A receiver of a bone anchor assembly includes a receiver body having a base portion and a pair of upright arms defining a channel for receiving a rod, the upright arms having top surfaces, opposed interior surfaces, and exterior side surfaces extending downward across the upright arms and base portion to a bottom of the receiver body. The receiver also includes a horizontally-elongate upper tool-engaging groove formed into the exterior side surface of each upright arm proximal to and below the top surface of the upright arm, extending horizontally to at least a front face or a back face of the upright arm, and including a downwardly-facing upper surface, an upwardly-facing lower surface, and an outwardly-facing inner surface. The receiver further includes a tool-engaging recess extending across the upper tool-engaging groove of each upright arm, with the tool-engaging recess extending upwardly through the downwardly-facing upper surface and downwardly through the upwardly-facing lower surface and including an outwardly-facing planar surface opposite and parallel to an outwardly-facing planar surface of the tool-engaging recess of the other upright arm.

Apparatus and method for dynamic connection between adjacent bones. Various embodiments pertain to a bone anchor that includes a rotatable spool, the spool being configured to place tension on a flexible member, such as a tether, suture, cable, or other. Still further embodiments pertain to tools for interconnecting two bone anchors with a tether.

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 bone anchoring device includes a receiving part with a recess for receiving a rod and a flexible head receiving portion for pivotably holding a head of a bone anchoring element, a pressure member configured to exert pressure on the head when the head is held in the head receiving portion, and a clamping ring positionable around the head receiving portion and movable from a first position where the head is pivotable relative to the receiving part, to a second position where the clamping ring exerts a radial force on the head receiving portion to lock the head relative to the receiving part. When the clamping ring is at the first position, the clamping ring abuts the receiving part to restrict upward movement, while a surface of the clamping ring that faces upwards is exposed for engaging an instrument to move the clamping ring to the second position.