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AssigneeSepitec Foundation
InventorsFritz Magerl, Erich Wintermantel, Jörg Mayer, Roger Roland Tognini, Clemens Dransfeld, Walter Spirig
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An osteosynthesis screw (1) used especially for application by a translaminar vertebral screw, comprises a shaft (3) at least partially provided with a thread (2) and a head (4) formed at one of its ends and having a notch (5) for a tool. Said shaft (3) has a section (A) with a thread (2) on the end section oriented towards the head (4). The remaining section (B) of the shaft (3) up to the free end is produced without a thread. The head (4) has a diameter (D1) corresponding at least approximately to the outer diameter (DA) of the thread (2) and is provided with the inner notch (5) for a tool. The section (A) of the shaft (3) with the thread (2) has a configuration of uniform thickness, e.g. a trilobular configuration. Thus, the invention provides an osteosynthesis screw (1) exhibiting a short section (A) with a thread (2) and a long section (B) without a thread, said screw having a pull-out head (4) which is secured both axially and rotationally.
An osteosynthesis screw, in particular for application in translaminar vertebral-screw fixation, with a shaft which at least in part comprises a thread and a head formed at least at one of its ends and comprising a notch arrangement for a tool, characterized in that the shaft (3) has a section (A) with a thread (2) on the end section oriented towards the head (4) and that the remaining section (B) of the shaft (3) up to the free end is without a thread (2), that the diameter (D1) of the head (4) corresponds at least approximately to the outer diameter (DA) of the thread (2) and comprises an inner notch arrangement (5) for a tool, and that at least one of the sections (A) of the shaft (3) with the thread (2) and the section (B) of the shaft (3) without the thread is non-circular and of uniform thickness.
An osteosynthesis screw, in particular for application in translaminar vertebral-screw fixation, with a shaft which at least in part comprises a thread and a head formed at least at one of its ends and comprising a notch arrangement for a tool, characterized in that the shaft (3) has a section (A) with a thread (2) on the end section oriented towards the head (4) and that the remaining section (B) of the shaft (3) up to the free end is without a thread (2), that the diameter (D1) of the head (4) corresponds at least approximately to the outer diameter (DA) of the thread (2) and comprises an inner notch arrangement (5) for a tool, and that at least one of the sections (A) of the shaft (3) with the thread (2) and the section (B) of the shaft (3) without the thread is non-circular and of uniform thickness, in that the screw has a cover (18) for closing off the inner notch arrangement (5) for a tool, with said cover being able to be placed onto the head (4) in a non-positive or positive manner and in that the cover (18) comprises an annular stay (19) pointing towards the head (4), said stay being able to be placed onto the annular collar (7) of reduced diameter (DB) at the head (4).
An osteosynthesis screw, in particular for application in translaminar vertebral-screw fixation, with a shaft which at least in part comprises a thread and a head formed at least at one of its ends and comprising a notch arrangement for-a tool, characterized in that the shaft (3) has a section (A) with a thread (2) on the end section oriented towards the head (4) and that the remaining section (B) of the shaft (3) up to the free end is without a thread (2), that the diameter (D1) of the head (4) corresponds at least approximately to the outer diameter (DA) of the thread (2) and comprises an inner notch arrangement (5) for a tool, and that at least one of the sections (A) of the shaft (3) with the thread (2) and the section (B) of the shaft (3) without the thread is non-circular and of uniform thickness, in that the screw has a cover (18) for closing off the inner notch arrangement (5) for a tool, with said cover being able to be placed onto the head (4) in a non-positive or positive manner and in that the cover (18) comprises annular stays (19, 22) projecting in both axial directions.
An osteosynthesis screw, in particular for application in translaminar vertebral-screw fixation, with a shaft which at least in part comprises a thread and a head formed at least at one of its ends and comprising a notch arrangement for a tool, characterized in that the shaft (3) has a section (A) with a thread (2) on the end section oriented towards the head (4) and that the remaining section (B) of the shaft (3) up to the free end is without a thread (2), that the diameter (D1) of the head (4) corresponds at least approximately to the outer diameter (DA) of the thread (2) and comprises an inner notch arrangement (5) for a tool, and that at least one of the sections (A) of the shaft (3) with the thread (2) and the section (B) of the shaft (3) without the thread is non-circular and of uniform thickness, that the screw has a cover (18) for closing off the inner notch arrangement (6) for a tool, with said cover being able to be placed onto the head (4) in a non-positive or positive manner and that the cover (18) at its centre comprises a predetermined breaking point or sections connected in sector-shape by way of predetermined breaking lines, for producing an opening when inserting a tool (24) with a cone-shaped or pyramid-shaped tip (25).
An osteosynthesis screw, in particular for application in translaminar vertebral-screw fixation, with a shaft which at least in part comprises a thread and a head formed at least at one of its ends and comprising a notch arrangement for a tool, characterized in that the shaft (3) has a section (A) with a thread (2) on the end section oriented towards the head (4) and that the remaining section (B) of the shaft (3) up to the free end is without a thread (2), that the diameter (D1) of the head (4) corresponds at least approximately to the outer diameter (DA) of the thread (2) and comprises an inner notch arrangement (5) for a tool, and that at least one of the sections (A) of the shaft (3) with the thread (2) and the section (B) of the shaft (3) without the thread is non-circular and of uniform thickness, and characterised by a trunnion (27) which at least partly fills-in a section of the borehole (32) which remains free after embedded placement of the osteosynthesis screw (1), said trunnion being made from an elastic, histocompatible, non-absorbable material.
Dependencies are inferred from the claim text.