Biedermann Technologies Gmbh & Co. Kg

Timo Biedermann

Lutz Biedermann

Wilfried Matthis

Berthold Dannecker

Bernd Fischer

Dimosthenis Dandanopoulos

Achim Schünemann

Kevin Dold

Achim Zipse

Gael Dreher

Tobias Hägle

Markku Biedermann

René Zandomeni

Dimosthenis Dandaniopoulos

Heiko Koller

Marc Mundhenke

Achim Schunemann

A bone anchor includes a shank having a free end, a longitudinal axis, a channel extending axially through the shank to the free end, the channel having a first width, and at least one opening extending through a wall of the shank, and a narrowing member including an elastically deformable portion configured to extend into the channel at or near the free end. The narrowing member is adjustable from a first configuration where the deformable portion defines an opening with a width smaller than the first width to restrict a substance from exiting through the free end, to a second configuration where the deformable portion is deformed radially outwardly to define an opening with a width that is at least the first width, while at least a portion of the shank positioned at a same axial height as the deformable portion maintains a constant outer width.

Bone anchor

An implant that is implantable between vertebrae includes a monolithic body with a first end and a second end opposite the first end, an outer surface extending axially from the first end to the second end, a plurality of teeth at the first end, each of the teeth extending axially away from the second end to a free end, and an abutment surface facing away from the second end that is positioned radially inwardly relative to at least one of the teeth. The abutment surface is recessed axially relative to the free ends of the teeth to an extent such that the abutment surface is configured to contact a vertebra when the implant is implanted. The monolithic body is configured to extend axially over a majority of an entire axial length of the implant.

Implant for engagement between vertebrae, and implant kit

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.

Coupling device and instrument for connecting the coupling device to a head of a bone anchor

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.

Coupling device for coupling a rod to a bone anchor and system including such a coupling device and at least two bone anchors

A coupling device is provided for coupling a rod to a bone anchoring element. The coupling device includes a receiving part having a first end, a second end, a central axis extending through the first end and the second end, and a channel for receiving a rod. The receiving part defines an accommodation space for accommodating a head of a bone anchoring element, the accommodation space having an opening for inserting the head. The coupling device further includes a pressure element arranged at least partially in the accommodation space, the pressure element having a flexible portion to clamp an inserted head, and a clamping element extending at least partially around the flexible portion of the pressure element. The clamping element is configured to move from a first position to a second position in which the clamping element exerts a clamping force onto the pressure element, where the movement includes rotating the clamping element around the central axis.

Coupling device for coupling a rod to a bone anchoring element and bone anchoring device with such a coupling device

An intervertebral implant includes a body with a first face, a second face connected to the first face, and an axis of rotation. The body defines a hollow space for connecting to an insertion device, the hollow space being accessible through an opening formed between the first and second faces. The opening is elongate and extends around the axis of rotation to facilitate pivoting of the implant relative to the insertion device about the axis of rotation to a first angular position and a second angular position. The implant further includes a first abutment surface that engages the insertion device in a form-fit manner at the first angular position, and a second abutment surface that engages the insertion device in a form-fit manner at the second angular position. The opening can also engage the insertion device to hold the implant at at least one additional angular position.

Inter vertebral implant and insertion device therefor

An anchoring element includes a shank for anchoring to bone and a separate head that is connectable to the shank. The head has an exterior surface with a spherically-shaped section and an unthreaded tool engagement surface that is engageable with a drive tool when the head and the shank are connected to one another.

Bone anchoring device

A surgical instrument includes a handle having first and second ends and a passage that extends between the ends, wherein a maximum height of the handle is less than a lateral length of the handle, a shaft having first and second ends and a longitudinal axis that extends between the ends, and a coaxial channel that extends completely through the shaft, wherein the shaft is releasably connectable to the handle when the first end of the shaft is inserted from the second end of the handle into the passage to a position closer to the first end of the handle than to the second end of the handle, and a secondary instrument configured to be inserted from the first end of the shaft into the channel and to extend out of the second end of the shaft when the shaft and the handle are connected to one another.

Surgical instrument

An anchoring assembly for anchoring a rod to a bone or vertebra includes a shank and a receiving part pivotably connected to one another, the receiving part defining a channel for the rod, a pressure element for locking the shank with the receiving part, first and second rods with different diameters configured to be interchangeably received in the channel, and first and second closure elements configured to interchangeably cooperate with the receiving part. The first closure element acts on the selected rod in the receiving part such that the rod exerts pressure on the pressure element to simultaneously lock the shank with the receiving part and fix the rod in the channel. The second closure element cooperates with the receiving part to act on the pressure element to lock the shank with the receiving part, and to act separately on the selected rod to fix the rod in the channel.

Anchoring assembly for anchoring a rod to a bone or a vertebra

An anchoring member for a polyaxial bone anchoring device includes a bone anchoring section having a first end, a second end, and a bone engagement structure, a head having an outer surface portion that defines a segment of a sphere, wherein a central axis extends through the head and the first and second ends of the bone anchoring section, and a neck extending between the first end of the bone anchoring section and the head. The neck has a first portion and a second portion between the first portion and the bone anchoring section. In at least a first cross-sectional plane including the central axis, the first portion of the neck is concave with a first curvature, and the second portion of the neck is concave with a second curvature that is less curved than the first curvature.

Anchoring member for a polyaxial bone anchoring device and polyaxial bone anchoring device with such an anchoring member

An intervertebral implant includes a body having a first face, a second face connected to and opposite the first face, a width and a length at least as long as the width that extend around the first and second faces, and first and second connection portions for connecting the implant to a separate holding member. The first and second connection portions each includes a hollow space accessible from outside the body through an opening formed between the first and second faces. The openings are elongate and extend away from one another around the implant from a same first side that defines the length of the body to respective second and third sides opposite to one another that define the width of the body, and are arranged such that the first and second connection portions are simultaneously engageable by the holding member.

Implant, insertion device, and plate assembly

A bone anchoring device for anchoring a rod to a bone or vertebra includes a receiving part with two legs defining a channel for the rod and a variable configuration member with a first rod contact surface configured to extend axially above a bottom of the channel to contact the rod. When a rod is inserted in the channel, the variable configuration member is adjustable from a first configuration where the first rod contact surface is at a first axial position relative to the receiving part and blocks the rod from contacting a second rod contact surface below the first rod contact surface, and a second configuration where the first rod contact surface is at a second axial position below the first axial position relative to the receiving part to permit the rod to contact the second rod contact surface.

An instrument is configured for use with a receiving part defining a recess for receiving a rod to connect the rod to a bone anchoring element. The instrument includes a tube having a first end and a second end, and defining a coaxial internal channel that opens towards the first and second ends, and at least one protruding portion monolithically formed with the tube that is engageable with the recess of the receiving part to prevent rotational movement of the tube relative to the receiving part. The first end of the tube forms a closed ring. The at least one protruding portion has a first region that extends radially outwardly from an outer surface of the tube at the first end and a second region that extends axially away from the first end in a direction opposite the second end.

Instrument for use with a bone anchoring device

A bone anchoring device includes a receiving part having a first end with an end surface, a second end, a recess at the first end for receiving a rod, and a flexible head receiving portion at the second end for pivotably holding a head of a bone anchoring element, 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 onto the head receiving portion to lock the head. The receiving part further includes a first engagement structure at or adjacent the end surface extending radially outwardly from an outer surface of the receiving part, such that a width of the receiving part including the first engagement structure is at least as wide as a maximum width of the clamping ring.

Polyaxial bone anchoring device and system of an instrument and a polyaxial bone anchoring device

A bone anchor includes a shank having a longitudinal axis, a core, a tip at one end of the core, and a thread forming a helix that extends around the core with a lower flank directed towards the tip and an upper flank directed away from the tip. A recess in a first turn of the thread forms a cutting structure, the recess being defined by first and second surfaces directly connected to one another at an angle. The first and second surfaces are spaced apart from every other turn of the thread above or below the first turn. A majority of the first surface is positioned higher axially than and circumferentially aligned with part of the second surface. At least one of the first or second surfaces extends circumferentially around the shank by a greater distance than an axial height of the at least one surface.

Growing community of inventors

Trossingen, Germany

Timo Biedermann