Method for producing a metal surface
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United States of America Patent
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Oct 12, 1999
Grant Date -
N/A
app pub date -
Feb 20, 1997
filing date -
Apr 10, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention shows a surface (2) for a metal implant (1) which has a coarse structure of elevations (3) and depressions (4), with the surface (2) being permeated by a network (5) of protruding ribs which form nodes (7) and interstices or meshes (8) having an interstice width of 2 mm to 0.4 mm, while the depressions represent sections of spherical cavities (11). The nodes (7) of the ribs can protrude the furthest like mountain peaks, whereas the ribs (6) which connect two nodes (7) each form a lower lying saddle (10) if the spherical cavities penetrate one another slightly. Through coating with an electrochemically resistant protective lacquer, into which holes can be shot at a predetermined spacing without damaging the metal, with a laser for example, a coarsely structured intermediary surface can be economically provided by means of electrochemical erosion which receives a fine structure through sand blasting.
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