47 results about "Bone anchor" patented technology

An anchor extender can be couplable to a bone anchor and can include an outer sleeve, an inner sleeve, and a lock. The lock can be operable to translate the inner sleeve relative to the outer sleeve between a locked position and an unlocked position to secure the inner sleeve and the outer sleeve to a head of the bone anchor in the locked position and to release the inner sleeve and the outer sleeve from the head of the bone anchor in the unlocked position.

A method of assembling a pivotal bone anchor assembly includes positioning a capture portion of a bone anchor and an insert within a central bore of a receiver, with the receiver having upstanding arms defining an open channel for receiving a rod, a cavity for receiving the bone anchor, and with at least one upstanding arm configured to slidably receive an insert compressing member in a direction parallel with a longitudinal axis of the receiver. The method also includes pressing continuously downward on the insert with the insert compressing member until the insert contacts the capture portion of the bone anchor to establish a pressable and releasable locking engagement of the bone anchor with respect to the receiver that is independent of a closure top. The method further includes positioning the elongate rod within the open channel of the receiver, followed by securing the closure top to a guide and advancement structure of the receiver above the elongate rod to establish a final locked configuration of the elongate rod and the pivotal bone anchor assembly, followed by slidably removing the insert compressing member from the receiver.

An adjustable implant system configured to non-invasively guide bone growth in a patient. The adjustable implant system includes a tether having a first end coupled to a fixed bone anchor and a second end coupled to an adjustable bone anchor. The adjustable bone anchor includes a driver disposed within a housing and the driver is configured to actuate in response to an externally applied magnetic field. The adjustable implant system includes an external adjustment device configured to non-invasively actuate the driver disposed within the adjustable bone anchor. Non-invasive actuation of the driver can cause the adjustable bone anchor to increase or decrease the amount of tension on the tether.

A medical set for the distraction of vertebral bodies, in particular in the treatment of vertebral body fractures, for use with at least a first and a second holding element (10, 11), wherein each of the holding elements (10, 11) comprises a distal section (12, 13) and a proximal section (14, 15) with a proximal end (16, 17) for receiving a bone anchor (18), in particular a bone screw, wherein the set has at least one compression device (19) which, in use, can be connected to the distal section (12, 13) of each of the first and second holding elements (10, 11) and is designed to change the distance between the distal sections (12, 13) of the first and second holding elements (10, 11), wherein the set has at least one spacer device (20) with a first receiving element (21) and a second receiving element (22),wherein the first receiving element (21) is designed for arrangement on the first holding element (10) corresponding to a shoulder portion (23) of the proximal portion (14) of the first holding element (10) and the second receiving element (22) is designed for arrangement on the second holding element (11) corresponding to a shoulder portion (24) of the proximal portion (15) of the second holding element (11) in order to form a rotational region and / or to induce a rotation of the holding elements (10, 11) about the shoulder portions (23, 24) when the distance between the distal portions (12, 13) of the first and second holding elements (10, 11) changes due to the compression device (19).

A pivotal bone anchor assembly includes a two-piece receiver comprising an upper body having an open channel for receiving a rod and an annular lower end with a downwardly-extending first connection structure, and a cylindrical base having a spherical seating surface adjacent a bottom opening and an upwardly-extending second connection structure configured for coupling with the first connection structure to secure the cylindrical base to the upper body. The assembly also includes a bone anchor comprising a capture portion and an anchor portion, and a retaining structure configured to secure the capture portion within the cylindrical base. The assembly further includes a pressure insert having an upper surface configured to receive the rod and a lower surface configured to engage an upper surface of the capture portion. The retaining structure is positionable into the cylindrical base and the pressure insert is positionable into the upper body prior to the cylindrical base and the upper body being coupled together to complete the two-piece receiver.

An anchor extender can be couplable to a bone anchor and can include an outer sleeve, an inner sleeve, and a lock. The lock can be operable to translate the inner sleeve relative to the outer sleeve between a locked position and an unlocked position to secure the inner sleeve and the outer sleeve to a head of the bone anchor in the locked position and to release the inner sleeve and the outer sleeve from the head of the bone anchor in the unlocked position.

A bone anchor includes a bone attachment structure and a receiver, with the receiver having a base portion and an upper portion defining a channel for receiving an elongate rod. The channel extends outwardly onto front and back faces of the receiver having opposite parallel-extending front and back planar surface portions formed thereon. The upper portion of the receiver also includes outside surfaces with horizontal tool engagement grooves spaced below top surfaces of the receiver and having downwardly-facing upper groove surfaces and upwardly-facing lower groove surfaces that extend between and to the front and back planar surface portions of the receiver. The upper portion further includes a vertical tool engagement passage formed into each outside surface that extends between the top surface down through to at least the upper groove surface of each horizontal tool engagement groove.

The disclosure relates to a bone anchored hearing aid device unit including a housing and an actuator having a first plate piezo element, and a clamp system configured for attaching the first plate piezo element to the housing, characterized in that the actuator has a second plate piezo element, in that the clamp system connects the first plate piezo element and the second plate piezo element, via the housing, and in that the clamp system is adapted for transferring, via the housing, a dynamic force between the first plate piezo element and the second plate piezo element. A method of operating a bone anchored hearing device unit is also disclosed.

An endoprosthesis intended to replace a resected portion of bone and joint. The endoprosthesis can be non-invasively, manually operated to lengthen a patient's limb both intraoperatively and postoperatively. It includes bone anchoring components for anchoring to a first and second long bone, a joint to replace the function of an orthopedic joint, and a purely mechanical lengthening mechanism which can be located and operated manually by an operator by pressing on skin of a patient without requiring a surgical incision. The axle for joint is the actuating mechanism that lengthens the implant. The endoprosthesis does not need or include any magnets, electric motors, electric current, application of heat or a fluid displacement (hydraulic) system.

A pivotal bone anchor assembly includes a receiver having a receiver channel for receiving a rod and a central bore with a support surface adjacent a bottom opening. The assembly also includes a shank having a capture portion configured for uploading into the central bore through the bottom opening and an anchor portion opposite the capture portion. The assembly further includes a retainer structure positionable the central bore prior to the capture portion of the shank, and an insert positionable into the central bore above the retainer structure with an insert channel alignable with the receiver channel. The retainer structure is configured to expand within the central bore upon the uploading of the capture portion through the bottom opening, and thereafter to close about and capture the capture structure with an outer surface of the retainer structure in engagement with the support surface of the central bore.

The invention concerns a polymer composition for making a bone anchoring part of an orthopedic implant for use in repair of damaged cartilage tissue, comprising a biostable thermoplastic polyurethane and 15-70 mass % of micron-sized inorganic particles comprising a biocompatible transition metal compound. It was found that the relatively rigid TPU composition comprising said inorganic particles allows making an anchoring part that can be inserted or press-fitted into a pre-drilled bone hole to form a firm and durable connection to bone tissue, and which may be visualized with for example X-ray or MRI methods. The polymer composition shows favorable properties and enables freedom in designing and making the implant with common techniques like injection molding. In other aspects, the invention relates to methods of making said polymer composition, and to using the polymer composition in making an orthopedic implant comprising a bone anchoring part, like in forming the implant with a multi-component injection molding process comprising a step of molding the bone anchoring part from the polymer composition.

An arthroplasty system may include a bone joint prosthesis, a bone anchor, a retention member, an articular component, and a component fastener. The bone joint prosthesis may include a bone-facing surface, a component-facing surface, and an anchor passageway formed therethrough. The bone anchor may be receivable through the anchor passageway to secure the bone joint prosthesis to a bone. The retention member may be couplable with the bone joint prosthesis to retain the bone anchor within the anchor passageway. The articular component may be couplable with the bone joint prosthesis and may include a component passageway formed therethrough. The component fastener may secure the articular component to the bone joint prosthesis by coupling within the component passageway, extending through the retention member, and coupling with the bone anchor to secure the articular component to the bone joint prosthesis.

A coupling device for coupling a rod to a bone anchor includes a receiving part having a central axis, a coaxial passage, and an engagement recess extending laterally into the passage, and a pressure member having an expandable portion to clamp the head, a radially outwardly facing surface, and an engagement surface extending from the radially outwardly facing surface. The engagement surface of the pressure member is recessed from an outer surface of the receiving part. The pressure member is movable axially from a first position towards a second position where the receiving part directly engages the pressure member to increase a compression force on the expandable portion for clamping an inserted head. The engagement surface of the pressure member is engageable through the engagement recess of the receiving part by the instrument to move the pressure member axially from the second position back towards the first position.

A method of assembling a pivotal bone anchor assembly includes loading an insert into a central bore of a receiver, with the receiver having the central bore extending upward from a bottom opening to and through a first channel for receiving a rod, and the insert having an upper portion defining a second channel, opposite lateral protrusions extending outwardly in a direction transverse to the second channel, a lower collet portion, and a center opening. The method also includes positioning the insert into the central bore with the opposite lateral protrusions located adjacent to and above interference abutment surfaces formed into the central bore, and positioning a load ring within the center opening of the insert. The method further includes uploading a shank head into the central bore of the receiver through the bottom opening, capturing the shank head within the lower collet portion of the insert, and then forcibly downward displacing the insert within the central bore with the tooling so as to move the opposite lateral protrusions below the interference abutment surfaces.

An endoprosthesis intended to replace a resected portion of bone and joint. The endoprosthesis can be non-invasively, manually operated to lengthen a patient's limb both intraoperatively and postoperatively. It includes bone anchoring components for anchoring to a first and second long bone, a joint to replace the function of an orthopedic joint, and a purely mechanical lengthening mechanism which can be located and operated manually by an operator by pressing on skin of a patient without requiring a surgical incision. The axle for joint is the actuating mechanism that lengthens the implant. The endoprosthesis does not need or include any magnets, electric motors, electric current, application of heat or a fluid displacement (hydraulic) system.

An instrument and method for cutting a pair of bridges connecting opposing extended tabs of a spinal bone anchor yoke receiver. The instrument includes a pair of opposing movable handles pivotally coupled to each other and a pair of opposing movable legs respectively at the distal end of the handles, each leg supporting a cutting blade facing the other cutting blade. A pair of anvil surfaces is disposed between the cutting blades and spaced therefrom for receipt of a respective bridge. Movement of the handles causes each cutting blade to move toward an anvil surface and compress a respective bridge between a respective cutting blade and an anvil surface until each bridge is severed. The method includes attaching the instrument to at least one of the extended tabs, cutting the bridges, and manipulating the instrument back and forth to remove the one extended tab from the yoke receiver.

An arthroplasty system may include an arthroplasty prosthesis with a joint-facing side having an articular surface and a bone-facing side having a prosthesis attachment feature, a bone anchoring component, and a component attachment feature configured to translatably couple the bone anchoring component to the prosthesis attachment feature. In a first unlocked configuration, the component attachment feature and the prosthesis attachment feature may be translatably coupled with each other enabling the bone anchoring component to translatably move with respect to the bone-facing side of the arthroplasty prosthesis. In a second locked configuration, at least one of the component attachment feature and the prosthesis attachment feature may expand and secure a relative position of the component attachment feature to the prosthesis attachment feature and prevent the bone anchoring component from translatably moving relative to the bone-facing side of the arthroplasty prosthesis.

A jaw displacement system for moving a lower jaw (5) relative to an upper jaw (6), comprising:-at least one bone anchor (7),-an elongate jaw shifter (8),-a frame (9) wherein the jaw displacement system permits the application of pressure between the frame (9) and the bone anchor (7) in order to displace the jaw (5) when the frame (9) is fixed to a molar (19) and when the bone anchor (7) is fixed to the bone of the lower jaw (5) on the buccal-labial side. The lower jaw (5) is moved to the ventral side with respect to the upper jaw (6).

An apparatus includes a reference array, a bone anchor, a receiver assembly coupled to the bone anchor, and an adapter axially locked with the receiver assembly. The adapter includes a proximal end coupled to the reference array and a distal end coupled to the receiver assembly.

Systems and methods for reducing the risk of PJK, PJF, and other conditions are disclosed herein. In some embodiments, a longitudinal extension can be added to a primary fixation construct to extend the construct to one or more additional vertebral levels. The extension can be attached to a first attachment point, such as a bone anchor implanted in a vertebra that is superior to the primary construct. The extension can also be attached to a second attachment point, such as a component of the primary construct or an anatomical structure disposed inferior to the first attachment point. The extension can be more flexible than the primary construct and / or can limit motion to a lesser degree than the primary construct, thereby providing a more-gradual transition from the instrumented vertebrae to the natural patient anatomy adjacent thereto. The extension can be placed with little or no soft tissue disruption.

A method of assembling a pivotal bone anchor assembly includes positioning an upper portion of a bone screw and a ring shaped structure into a central bore of a receiver, the central bore having an internal retaining recess above a lower opening, the upper portion having a partial spherical lower surface providing for pivotal motion of the bone screw with respect to the receiver. The method also includes positioning an insert into the central bore, the insert having a bottom surface for transferring a compressive force to lock the pivotal bone anchor assembly and a pair of insert arms defining an insert channel for receiving a rod, the insert arms including upwardly-facing surfaces extending between front and back faces of the insert. The method further includes pressing the insert into position within the central bore such that the upwardly-facing surfaces are positioned under a downwardly-facing surface of the internal retaining recess to inhibit upward movement of the insert within the receiver.

An apparatus includes a reference array, a bone anchor, a receiver assembly coupled to the bone anchor, and an adapter axially locked with the receiver assembly. The adapter includes a proximal end coupled to the reference array and a distal end coupled to the receiver assembly.

A coupling device for coupling a rod to a bone anchor includes a receiving part having a central axis, a coaxial passage, and an engagement recess extending laterally into the passage, and a pressure member having an expandable portion to clamp the head, a radially outwardly facing surface, and an engagement surface extending from the radially outwardly facing surface. The engagement surface of the pressure member is recessed from an outer surface of the receiving part. The pressure member is movable axially from a first position towards a second position where the receiving part directly engages the pressure member to increase a compression force on the expandable portion for clamping an inserted head. The engagement surface of the pressure member is engageable through the engagement recess of the receiving part by the instrument to move the pressure member axially from the second position back towards the first position.

An arthroplasty system may include a bone joint prosthesis, a bone anchor, a retention member, an articular component, and a component fastener. The bone joint prosthesis may include a bone-facing surface, a component-facing surface, and an anchor passageway formed therethrough. The bone anchor may be receivable through the anchor passageway to secure the bone joint prosthesis to a bone. The retention member may be couplable with the bone joint prosthesis to retain the bone anchor within the anchor passageway. The articular component may be couplable with the bone joint prosthesis and may include a component passageway formed therethrough. The component fastener may secure the articular component to the bone joint prosthesis by coupling within the component passageway, extending through the retention member, and coupling with the bone anchor to secure the articular component to the bone joint prosthesis.

A retractor assembly that includes a base portion in slidable engagement with two or more retractor arms with at least one of the retractor arms releasably securing a retractor blade configured to be anchored to a bone anchor. The retractor blade includes an elongate blade portion with a retractor engagement portion positioned at the proximal end of the elongate blade portion and an anchor mechanism positioned at the distal end of the elongate blade portion. The anchor mechanism includes a first jaw and second jaw configured to engage the bone implant. When closed around or anchored to the bone implant—which may be a shank of a modular screw system—the components of the modular screw are able to be assembled to the shank without adjusting, loosening, or opening the anchor mechanism.

Surgical instruments that are configured to couple to a bone anchor assembly to provide a modular platform for carrying out various steps of a surgical procedure, such as spinal rod reduction and derotation, are provided. For example, in one embodiment a surgical instrument can include an outer sleeve terminating in a pair of extensions, an inner sleeve having a proximal threaded portion and a distal translating portion configured to pass through the outer sleeve, and a pair of pivoting arms received in the extensions of the outer sleeve. The pivoting arms can be configured to extend into a channel of the outer sleeve to couple a bone anchor to the outer sleeve, and a proximal end portion of the outer sleeve can include one or more flats configured to engage with another instrument.

A spinal fixation structure is configured to limit splay. The spinal fixation structure includes a receiver and a threaded closure. The threaded closure is configured to engage an elongate rod when positioned within an open channel of the receiver. When the elongate rod is positioned in the open channel and the threaded closure is advanced against the elongate rod, splay between the pair of upright arms is controlled by a limited amount of permissible sliding between the first linear surface portion of the receiver load flank of the receiver and the second linear surface portion of closure load flank.

Surgical instruments and method to aid in separating an implant from another component at a surgical site are disclosed. An example device can include a body with a proximal-facing surface, a distal-facing surface, as well as opposed first and second lateral ends extending therebetween. The device can further include a first arm extending proximally from the body, the first arm being laterally offset from a center of the body toward the first lateral end of the body. The device can further include a second arm extending distally from the body, the second arm being laterally offset from the first arm toward the second lateral end of the body. The device provides a relatively simple instrument that can be employed to aid in separating a reducer or other component from an implanted bone anchor or other implant.

The invention concerns a fixation plate for fixing to a proximal humerus, comprising a head part for attachment distally from the foot plate of the major tubercle of the humerus, which is provided with first screw holes with internal screw thread for angularly stable screws, of which two arranged furthest from the shaft part are provided as upper screw holes for a downwardly directed screw, and suture holes, of which one anchoring suture hole for anchoring thereto, by means of suture material, a bone anchoring element attached in the apex of the humeral head, and a shaft part adjoining this head part at the bottom for being attached to the humeral shaft. In addition, the invention concerns a set of such a fixation plate and a side arm, and a method for treating a shoulder fracture using such a fixation plate.