21 results about "Bone anchor" patented technology

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.

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 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 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.

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).

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.

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 bone conduction hearing system, comprising: an implantable portion implantable in a human; and a detachable portion detachable from the human, wherein the detachable portion includes a battery powered electronic unit and a microphone that acquires sound and generates a signal which is sent to the electronic unit, wherein the electronic unit processes the signal, and wherein the bone conduction hearing system includes a memory, and the bone conduction hearing system includes a data interface that enables data communication between the system and an external computing system.

A hip arthroplasty system, intended to improve anatomic placement and maintain bone stock, includes a nail for insertion into an intramedullary canal of a femur, screw holes generally perpendicular to the nail, and a hole having a transverse axis. The system also includes a bone anchor having an opening for a cut-off femoral neck, a neck component having a longitudinal body and a seat for the femoral head, a femoral head, and an acetabular cup assembly. A jig is provided for implanting the system and includes a guide that orients relative to the nail, attachment hardware, a rail adapted to extend parallel to the transverse axis of the nail, and a second guide slidably displaceable along the rail. The system provides significant adjustability and retains maximum bone for the possibility of revision.

Methods, devices, and systems for spinal deformity correction. In some embodiments, a bone anchor may comprise an outer thread form, an inner chamber, and a non-threaded introducer tip. The introducer tip may comprise a cylindrical shape comprising a distal edge configured to facilitate penetration into the first vertebral body. The distal edge may have a larger width than an adjacent section of the first bone anchor proximal to the distal edge. In some embodiments, a removable cap may be provided. In some embodiments, the bone anchor may comprise a tether seat having distinct regions each configured to receive a distinct tether.

A method of assembling a pivotal bone anchor assembly includes positioning a capture portion of a shank, a retainer, and an insert into a receiver. The receiver includes an internal cavity with a circumferential groove adjacent a bottom opening, a first channel with a discontinuous downward-facing surface below a guide and advancement structure, and an internal cylindrical surface with a fixed rotation abutment surface. The shank with a capture portion is uploadable through the bottom opening. The retainer is uploadable into the circumferential groove to engage and hold the capture portion within the cavity. The insert includes a cylindrical body with a second channel between upstanding arms and is positionable into the first channel with the second channel transverse to the first channel. The method further includes rotating the insert within the receiver until the second channel of the insert is aligned with the first channel of the receiver.

A pivotal bone anchor assembly includes a receiver having an open channel for receiving a rod and a cavity or lower portion of a central bore with a spherical seating surface adjacent a bottom opening. The assembly also includes a shank having an upper capture portion opposite an anchor portion, with the upper capture portion being uploaded into the cavity of the receiver through the bottom opening and pivotally supported therein by an articulating retainer engaging the spherical seating surface. The assembly further includes a compression insert disposed within the central bore having a rod-receiving surface alignable with the open channel and opposite outer recesses for receiving opposed inwardly-crimped integral structures extending inwardly from interior surfaces of the central bore to restrict rotational movement of the compression insert within the receiver.

The invention provides surgical methods, devices, apparatus, and systems for supporting the thumb of a patient after basal joint arthroplasty. The embodiments of the invention comprise at least one index metacarpal anchor, at least one thumb metacarpal anchor, at least one sling for positioning the thumb metacarpal anchor relative to the index metacarpal anchor, and at least one anchor washer for tightening and securing the sling(s) without the need to tie the suture(s) components of the sling(s) into knots. Index and thumb metacarpal anchors comprise at least one bone-engaging element for engaging the respective metacarpal. The anchor washer may incorporate one or more sling-engagement mechanisms. Increasing the number of sling-engagement mechanisms associated with the anchor washer increases the surface area of the sling(s) and provides multiple sling elements to provide redundancy and increase the pull force of the sling(s) attachment(s) used to affix the thumb and index metacarpal anchors into a position relative to each other.

The present disclosure relates generally to surgical instruments for delivering locking or set screws (110) to secure a rod or spinal fastening element relative to an implantable bone anchor or other spinal fastening construct during spinal surgery. In one embodiment, an inserter instrument (100) includes an inner driver shaft (102), a ratcheting outer sleeve (104), and a handle (106) configured to receive the shaft and the sleeve therein. The inner driver shaft can receive a plurality of set screws on a distal end thereof. A side latch, pawl, or button (178) engages the ratcheting outer sleeve to facilitate stepwise advancement of the sleeve relative to the driver shaft for set screw delivery. Stepwise advancement can be controlled using another button that causes movement of the side latch.