04484570 is referenced by 680 patents and cites 13 patents.

A plate is provided with clearance holes and fastening screws. Each screw is provided in the region of its head with a clamping part subdivided into tongues by means of slots and provided with an internal opening bounded by a conical surface. To each screw belongs an expander having a conical outer surface. The expander is axially displaceable in relation to the clamping part to force the tongues of the clamping part apart and lock the screw in relation to the plate. A rigid connection between the plate and the screws is thus provided, even if reabsorption of bone material takes place at the bearing surface of the plate.

Title
Device comprising an implant and screws for fastening said implant to a bone, and a device for connecting two separated pieces of bone
Application Number
6/266352
Publication Number
4484570
Application Date
May 22, 1981
Publication Date
November 27, 1984
Inventor
Joram Raveh
Oberbottigen
CH
Fritz Straumann
Waldenburg
CH
Franz Sutter
Niederdorf
CH
Agent
Davis Hoxie Faithfull & Hapgood
Assignee
Synthes
PA, US
IPC
A61F 5/04
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