Abstract: The invention relates to an extension device for a bone anchor, in particular for a bone screw, in particular for a pedicle screw, in particular in minimally invasive spinal surgery, the device having an axial longitudinal direction, a peripheral direction concentric therewith, and a radial direction, wherein the extension device extends in the axial longitudinal direction and engages, by means of a radial projection, an engageable region on the head of the bone anchor in the longitudinal direction and also in the radial direction and can be supported against the head of the bone anchor in the opposite direction so that the extension device can thereby be fixed to the head of the bone anchor so as to be detachable, yet also rigid in the longitudinal direction and non-rotatable.

Abstract: The invention relates to a bone anchor for triangular iliosacral osteosynthesis. The bone anchor includes an ilium screw having a first longitudinal direction and an iliosacral screw having a second longitudinal direction. The ilium screw, in a thread-free portion, has a preferably elongated-hole-like through-opening transversely to the first longitudinal direction, and the iliosacral screw has such a smaller outer diameter in relation to the ilium screw that the iliosacral screw can be guided through the through-opening and can be screwed proceeding from the ilium into the sacrum, through the ilium screw.

Abstract: The invention relates to a device for correcting a bone fracture using bone anchors, in particular bone screws, and extension devices attachable to the bone anchors.

Abstract: The invention relates to a polyaxial screw including a screw anchor and a fork head which has two arms, is U-shaped in a lateral view and has a receiving opening for a correction element, and including a pressure piece which can be arranged in the fork head between the head of the screw anchor and the correction element, rests on the head of the screw anchor and can be loaded by the correction element.

Abstract: The invention relates to a device for correcting a bone fracture using bone anchors, in particular bone screws, and extension devices attachable to the bone anchors.

Abstract: The invention relates to a bone anchor for triangular iliosacral osteosynthesis. The bone anchor includes an ilium screw having a first longitudinal direction and an iliosacral screw having a second longitudinal direction. The ilium screw, in a thread-free portion, has a preferably elongated-hole-like through-opening transversely to the first longitudinal direction, and the iliosacral screw has such a smaller outer diameter in relation to the ilium screw that the iliosacral screw can be guided through the through-opening and can be screwed proceeding from the ilium into the sacrum, through the ilium screw.

Abstract: The invention relates to a polyaxial pedicle screw (2) comprising a screw anchor (4), which has a threaded shaft (6) and a head (8), and comprising a fork head (10), which is U-shaped in side view and has a receiving opening (16) for a corrective element, in particular a correcting rod, and two arms (12), wherein the head is polyaxially pivotably mounted in a distal end region (14) of the fork head and the fork head can be fixed in a pivoted position intended by the surgeon relative to the head, and also comprising a pressure piece (18) which can be arranged in the fork between the head and the corrective element which, on the one hand, rests on the head and, on the other hand, can be loaded by the corrective element, wherein the region of one arm of the fork head the pressure piece is supported by means of a pivot bearing (54) against this arm in the axial direction (20), and that diametrically opposite the pressure piece has a receiving region (42) for a positioning force (44) acting in the axial direction

Abstract: The invention relates to a polyaxial screw including a screw anchor and a fork head which has two arms, is U-shaped in a lateral view and has a receiving opening for a correction element, and including a pressure piece which can be arranged in the fork head between the head of the screw anchor and the correction element, rests on the head of the screw anchor and can be loaded by the correction element.

Abstract: The invention refers to an extension device (1) for a bone screw (4) and to a screwdriver instrument (2) connectable to the extension device (1); it is proposed that the screwdriver instrument (2) comprises a toggle lever mechanism (62) having a first and a second lever arm (64, 66), which are pivotally connected to each other through a common articulation point (68), that the first lever arm (64) may be removably applied, in the area of its free end (70), at a first pivot bearing point (72) on the extension device (1) and is pivotally mounted and axially supported in the applied state, and that the second lever arm (66) is pivotally mounted and axially supported at a second pivot bearing point (74) on the shank, that the first lever arm (64) is elastically and longitudinally extendable, and that this longitudinal extensibility and a distance between the second pivot bearing point (74) and the common articulation point (68) of the lever arms (64, 66) are adapted to each other in such a way that when manually

Abstract: The invention relates to a handling instrument for a pedicle screw. The handling instrument is connectable to the pedicle screw in a rigid and rotationally fixed manner. The handling instrument includes a housing part which extends in an axial longitudinal direction and which is tubular or sleeve-shaped in some sections, and a rod part, which is arranged in the outer housing part and which can engage into a tool placement point of the pedicle screw. The housing part has a guide slot, and the rod part has a transverse opening, which extends in a radial direction, in particular in the region of the guide slot of the housing part.

Abstract: The invention relates to an extension device for a bone anchor, in particular for a bone screw, in particular for a pedicle screw, in particular in minimally invasive spinal surgery, the device having an axial longitudinal direction, a peripheral direction concentric therewith, and a radial direction, wherein the extension device extends in the axial longitudinal direction and engages, by means of a radial projection, an engageable region on the head of the bone anchor in the longitudinal direction and also in the radial direction and can be supported against the head of the bone anchor in the opposite direction so that the extension device can thereby be fixed to the head of the bone anchor so as to be detachable, yet also rigid in the longitudinal direction and non-rotatable.

Abstract: The invention relates to an extension device (2) for a bone anchor (4), in particular for a pedicle screw having an axial longitudinal direction (16), a circumferential direction (18) concentric thereto and a radial direction (20), wherein the extension device (2) is extended in the axial longitudinal direction (16) and can be detachably fixed to the head (8) of the bone anchor (4), wherein the extension device (2) comprises two shell parts (22) that are separate from each other and extended in the longitudinal direction 16, characterized in that, the extension device further comprises a sleeve-like housing part (60) that can be slid in the axial longitudinal direction (16) onto the two shell parts (22) which are separated from each other and detachably fixed to the head of the bone anchor and, in the applied state, limits and defines a tunnel-like access (106) to the bone anchor (4) that extends in the axial direction (16).

Abstract: The invention relates to a rod insertion device (10) for the insertion of a fixation rod (1) into a pedicle screw, comprising a receiving body (20), which has, at its distal end, a receiving recess (22) with opposite guide grooves (24), a clamping body arranged displaceably in the receiving body (20) for clamping the transverse rod in the receiving groove of the rod insertion device, wherein, in an entry area, the guide grooves of the receiving recess (22) are formed in a first direction in the receiving body (20) and, in a force-fitting area behind the entry area, are formed in a second direction different from the first direction, with the result that an inserted fixation rod is blocked in the first direction and/or in that a blocking element (30) is further provided with a detent (32), which is mounted movable between a release position and a blocking position.

Abstract: Osteosynthesis device, in particular a pedicle screw, having a bone anchor, in particular a bone screw, with a shank and a head, and having a fork head which is U-shaped in a side view and which has two arms at a proximal end area and is formed in one piece, wherein the head of the bone anchor is mounted pivotably on a distal end area of the fork head directed away from the arms, wherein the fork head has, at the distal end area, a receiving opening for the head of the bone anchor, which receiving opening is delimited in the radial direction by spring portions, wherein the spring portions are delimited radially inwards by the receiving opening and radially outwards by an annular groove arranged concentrically with respect to the receiving opening, said annular groove forming a seat for a securing element, wherein the head of the bone anchor is inserted into the receiving opening from the direction of the distal end of the fork head.

Abstract: The invention relates to a handling instrument for connecting to a bone anchor, comprising a first outer and a second inner sleeve-shaped housing part with a respective longitudinal direction, a first housing part internal thread which extends in the respective longitudinal direction, and a second housing part external thread.

Abstract: Disclosed is a device for carrying out a distraction and/or compression of vertebral bodies.

Abstract: Disclosed is a device for carrying out a distraction and/or a compression of vertebral bodies during spinal surgery, said device comprising a first and a second sleeve-shaped extension part, each part having a longitudinal direction and each of which parts can be secured on a bone anchor in a detachable but rigid and rotationally fixed manner. The device is characterized by a first eccentric bearing part and a second counter bearing part, which parts can be positioned on the first and on the second extension part respectively in corresponding positions, and in that, at least the eccentric bearing part can be rotated relative to the first extension part about the longitudinal direction of said extension part, such that due to the eccentricity, the first bearing part can be brought into contact with the second counter bearing part and thus a bearing position is formed for forming a pivot joint between the two extension parts in order to perform the distraction or compression.

Abstract: The invention relates to a uniplanar bone anchoring element (10) comprising an anchoring screw (12) with a bone thread (14) and a screw head (18), which is flattened on at least one side (17); a receiving element (20) that has a through-bore which tapers in a lower region (21) and in which the anchoring screw (12) can be received; and two limbs (25, 26) which extend upwards and which comprise a threaded profile (27) in an upper region, said threaded profile being designed for screwing on a securing screw. The receiving element (20) has an inner groove (24) which partly runs at least in the circumferential direction in the seat region of the anchoring screw head (18). The bone anchoring element also comprises a bearing element (40) for inserting into the inner groove (24) of the receiving element (20).

Abstract: The invention relates to an instrument for connecting a correction rod to a bone screw, the instrument having an axial longitudinal direction and comprising an external first housing part, which includes a hollow portion having an internal thread and a portion that is approximately the shape of a half-shell and that forms a first clamp leg. The instrument further includes an external second housing part, which is approximately the shape of a half-shell and forms a second clamp leg that is hinged on the first clamp leg so as to be pivotable about a pivot axis that extends orthogonally to the axial longitudinal direction.

Abstract: The invention relates to a handling instrument for a pedicle screw. The handling instrument is connectable to the pedicle screw in a rigid and rotationally fixed manner. The handling instrument includes a housing part which extends in an axial longitudinal direction and which is tubular or sleeve-shaped in some sections, and a rod part, which is arranged in the outer housing part and which can engage into a tool placement point of the pedicle screw. The housing part has a guide slot, and the rod part has a transverse opening, which extends in a radial direction, in particular in the region of the guide slot of the housing part.