Sulzer Orthopaedie Ag

Ttp Group, Plc

John Maclaren Cassells

Anne Tregoning Miller

Roland Baege

Timothy Andrew Large

Toby StJohn King

Andrew R Halket

Adrian M Woodward

A surface for a metal implant has a coarse structure of elevations and depressions, with the surface being permeated by a network of protruding ribs which form nodes and interstices or meshes having an interstice width of 2 mm to 0.4 mm, while the depressions represent sections of spherical cavities. The nodes of the ribs can protrude the furthest like mountain peaks, whereas the ribs which connect two nodes each form a lower lying saddle 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.

Metal implant with anchoring surface

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.

Method for producing a metal surface

Apparatus and method for cooling of liquids

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Houghton, United Kingdom

John Maclaren Cassells