Bone screw
OwnerMeinrad Fiechter, Friedrich Magerl +1inventors
InventorsMeinrad Fiechter, Friedrich Magerl, Ronald Wieling
Life of this patent
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Abstract
The invention relates to a bone screw having a screw shaft (15) comprising a point (13) and concentric to a longitudinal axis (27) of the screw, and that can be anchored in a bone or part of a bone. A screw head (14) is attached to the screw shaft (15). The screw shaft (15) is substantially made of a plastic transparent to X-rays. A part (5, 7, 9, 24) of the screw shaft (15) is made of a different material than that of a core (3, 30) substantially forming the screw shaft (15). The at least one load-bearing area (5, 7, 9, 24) is preferably made of metal or plastic, such as PEEK.
Claims10
1-8. (canceled)
A bone screw having a longitudinal axis and comprising:
- a screw shank that has a tip, is concentric to the longitudinal axis of the screw and is to be anchored in a bone or part of a bone, said screw shank being formed from a core made of a first material;
- and
- a screw head that is secured on said screw shank and that comprises engagement means, wherein said screw shank is made substantially of a plastic material that is transparent to X-rays, and said screw has at least one part defining a load-bearing area and made of a second material that is different from the first material.
Dependencies are inferred from the claim text.