95 results about "Bone Anchors" patented technology

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.

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.

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 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.

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.

A bone anchor includes a shank with a first end, an opposite second end, and a longitudinal axis. The shank includes a core, a thread that extends in a helix around the core and that has a lower flank directed towards the first end and an upper flank directed towards the second end, wherein the upper flank and the lower flank define a first cross-sectional thread shape, and an additional thread structure including a recess that extends together with part of the thread in the helix around the core. The thread and the additional thread structure together define a second cross-sectional thread shape different from the first cross-sectional thread shape. An axial length of the portion of the thread that has only the first cross-sectional thread shape is greater than an axial length of the entire portion of the thread that includes the second cross-sectional thread shape.

The present disclosure relates to a registration device (2) for registering at least two bones (K1, K2, K3), comprising at least two bone anchors (4), each of the bone anchors (4) comprising a fastening section (6) configured to be rigidly attached to each of the bones (K1, K2, K3), and a bone tracker (8) with an individual optical pattern (10) configured for tracking, a temporary fastening device (12) wherein the fastening device (12) is configured to rigidly connect the bone anchors (4) together, and a registration body (18) wherein the registration body (18) is configured to be rigidly connected to one of the bone anchors (4), and comprising a plurality of radiopaque markers (20) and an optical pattern (22) configured for tracking.Furthermore, the present disclosure relates to a method for registration using the registration device (2).

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.

A bone fixation assembly includes a plurality of bone fixation elements that each include a bone anchor configured to be implanted into underlying bone, such as a vertebra. Each bone anchor is received in an anchor seat, and the anchor seats are joined by a fixation rod so as to operatively couple and fix the position and orientation of the vertebrae relative to each other. The bone anchor is free to rotate relative to the anchor seat, and is also free to pivot in a desired direction relative to the anchor seat.

An implant system for dynamic stabilization of a syndesmosis joint,. The system includes a soft bone anchor, a dynamic bone anchor and a tether coupled to and extending between the soft bone anchor and the dynamic bone anchor. The first and second retention portions of the tether are knotlessly coupled to the dynamic bone anchor, and an intermediate portion of the tether extends between the first and second retention portions and passes through the soft bone anchor. A medial portion of the intermediate portion extends into the dynamic bone anchor and is resiliently coupled to the dynamic bone anchor. The system further includes an insertion and tensioning instrument, the soft bone anchor being removably retained on a free end of a first portion of the instrument, and the dynamic bone anchor being removably retained on at least one of the first portion and a second portion of the instrument.

A bone anchor is provided for connecting a rod to a bone structure, the bone anchor having a rod housing configured to accommodate the rod; a cavity distal to the rod housing dimensioned to accommodate the bone structure; and a deployable purchase element capable of assuming a deployed position in which the purchase element protrudes into the cavity, and capable of assuming a non-deployed position in which the purchase element does not substantially protrude into the cavity.

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 pivotal bone anchor assembly includes a receiver having a lower cavity with a circumferential groove adjacent a bottom opening, an upper first channel with a downward-facing surface formed therein below a closure mating structure, and a substantially cylindrical surface extending below the downward-facing surface with an alignment stop structure. The assembly also includes a shank having a capture portion configured for uploading into the cavity through the bottom opening, and an open ring retainer uploadable into the circumferential groove through the bottom opening after the capture portion so as to retain the capture portion within the cavity. The assembly further includes a pressure insert positionable into the first channel with a second channel of the pressure insert being transverse to the first channel of the receiver, after which the pressure insert is rotatable within the receiver until upwardly-facing surfaces on the insert rotate beneath the downward-facing surface to inhibit upward movement of the pressure insert, and a protruding rotational abutment structure on the insert engages the alignment stop structure to inhibit further rotation of the pressure insert when the second channel is aligned with the first channel.

To provide a bone anchor tip for penetrating a hard or dense bone.SOLUTION: A tip 10 for a bone anchor 12 has cutting edges 16 that converge at the end of the body to form a point 20, thereby defining a series of cutting surfaces 14. The cutting surface may be planar or curved, and may be multi-faceted. The tip may include a broach that extends parallel or at an angle to the tip. The broach may be partially or completely interrupted by one of the cutting surfaces. The tip is designed to be coupled to any of a variety of bone anchor types, including those that have mechanical retention structures, those that change shape in response to insertion into bone, or those that have threads for advancing the anchor into bone. The anchor and the body may be integrally formed together, or the anchor and the body may be formed from different materials.SELECTED DRAWING: Figure 1