Implantable superhydrophobic surfaces
AssigneeBVW Holding AG
InventorsLukas Bluecher, Michael Milbocker
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Abstract
Bio-adhesive textured surfaces are described which allow implants to be localized within a living body. Hierarchical levels of texture on an implantable medical device, some capable of establishing a Wenzel state and others a Cassie state, are employed to interface with living structures to provide resistance to device migration. Since a gaseous state is traditionally required to establish a Cassie or Wenzel state, and gases do not remain long in living tissue, described are tissue/device interactions analogous to the above states with the component normally represented by a gas replaced by a bodily constituent, wherein separation of tissue constituents develops and an analogous Cassie, Wenzel or Cassie-Wenzel state evolves.
Claims17
A bioadhesive textured surface comprising at least two surface textures on a substrate,
- wherein the at least two surface textures comprise a first surface texture having a smaller pitch than a second surface texture, the first surface texture being disposed on the second surface texture to form a hierarchical structure on the substrate,
- wherein upon contact with a tissue, the surface textures are configured to form interfaces with the tissue, wherein
- the first surface texture is configured to contact water present on the tissue and form a first interface;
- and
- a part of the second surface texture is configured to contact a surface of the tissue and form a second interface;
- wherein the interfaces have a sessile drop contact hysteresis angle of at least 5 degrees.
Dependencies are inferred from the claim text.