Biotronik Ag

Okechukwu Anopuo

Ullrich Bayer

Daniel Lootz

Bernd Block

Monika Badendieck

Susanne Peters

Thomas Drobek

Jan Hannemann

André Schoof

Alexander Heuss

A bone screw formed primarily of a magnesium alloy has a self-tapping thread, and is prestressed with a retained torsional stress oriented oppositely to the direction in which the screw is screwed into bone. The pre-stressing opposes the torsional stresses arising from screwing in the screw, thereby raising the effective strength of the screw and/or allowing for a reduction in its size/mass.

Resorbable metal screw with increased torsional strength for osteopathy

The production of microstructured surfaces in magnesium alloys, containing zinc as the major alloying element, in particular in absorbable implants such as stents, wherein microstructures in sizes of up to 5 &#x3bc;m (micrometers) are generated on a magnesium alloy base body of the absorbable implant, for example of the absorbable stent, by way of optionally combined, pickling and electrochemical micropolishing processes, and allow better adhesion of a polymer coating (including higher break resistance) and higher corrosion resistance. The microstructured surface is produced out of the bulk material and exhibits no delamination from the base material during the mechanical deformation of the implant.

Microstructured absorbable implant

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Rostock, Germany

Okechukwu Anopuo