04388921 is referenced by 359 patents and cites 8 patents.

A plate bearing against a bone has a number of clearance holes with sleeves. Openings provided in the sleeves include each a section diverging away from the bone and bounded by a conical surface. The sleeves are subdivided into tongues by means of slots cut into the free face of the collar. A screw is screwed into the bone at every clearance hole, the head of the screw being bounded by a conical or convex surface. By tightening the screw the tongues are forced apart by the head of the screw, thus clamping the sleeve in relation to the plate. This provides a guarantee, that the plate will stay rigidly connected with the screws, even if a reabsorption of bone takes place. Some of the sleeves comprise clamping parts excentric in relation to the screw axes, enabling the surgeon to press the bone pieces against each other.

Title
Device comprising a plate and screws for fastening a plate to a bone
Application Number
6/266351
Publication Number
4388921
Application Date
May 22, 1981
Publication Date
June 21, 1983
Inventor
Fritz Straumann
Waldenburg
CH
Franz Sutter
Niederdorf
CH
Agent
Michael J Striker
Assignee
Institut Straumann
CH
IPC
A61F 5/04
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