Substrate with a Structured Surface and Methods for the Production Thereof, and Methods for Determining the Wetting Properties Thereof
OwnerHerbert Jennisseninventor
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Abstract
An implant includes a microstructured hyperhydrophilic surface with protrusions and depressions in which a spacing between the protrusions as a statistical mean is in a range of 1 to 100 μm and a profile height of the protrusions and depressions as a statistical mean is in the range of 1 to 80 μm.
Claims13
A method for the production of an implant with a regularly microstructured surface with protrusions and depressions, wherein the spacing between the protrusions as the statistical mean is in a range of 1 to 100 μm and a profile height of the protrusions and depressions as a statistical mean is in a range of 1 to 80 μm, and wherein the implant has a microscopic roughness factor rM in a range between 2 and 50, comprising:
- a) providing a powder or a powder mixture of a sinterable material powder on a blank;
- b) applying a layer of the metal powder to the surface of the blank;
- and
- c) acting on the layer of the material powder with energy-rich radiation in a pattern which can be represented from a periodic function converted into an STL data set so that material powder is sintered on at least a partial region of the surface of the blank with the formation of at least a partial region of the pattern.
A method for the production of an implant with a regularly microstructured surface, comprising:
- a) providing a blank;
- and
- b) acting on the blank with energy-rich radiation at least partially in a pattern which can be represented from a periodic function converted into an STL data set so that the blank is ablated with the formation of at least a partial region of the pattern on at least a partial region of the surface.
A method for determining the wetting properties of the surface of a substrate, comprising:
- a) carrying out a Wilhelmy/force measurement for ascertaining (Kθ·F),
- b) calculating the apparent contact angles θV and θR on the basis of the result of step a), wherein said calculation
- i. is effected for the situation where (Kθ·F)≤1 in accordance with arccos (Kθ·F)=real contact angles;
- and
- ii. is effected for the situation where (Kθ·F)>1 in accordance with arccos(Kθ·F)=imaginary contact angles;
- and
- c) determining the wetting properties of the substrate on the basis of the contact angles θV and θR calculated in step b).
Dependencies are inferred from the claim text.