Bvw Holding Ag

Mast Biosurgery Ag

Bvw Invest Ag

Lukas Bluecher

Michael Milbocker

Kenneth Kleinhenz

Hinrich Wiese

Roel Trip

Joerg Tessmar

Martina Kessler

Soft tissue repair grafts are described comprising an anti-adhesion layer, a structural layer, and a localization layer. These layers may be distinct or integrated into one substrate. The term layer is used to distinguish tissue repair graft functionality rather than distinct material layers. The distinct layers of functionality may comprise a single plane of a substance.

Microstructure soft tissue graft

A microstructured pressure-sensitive surface is described comprising a Wenzel-Cassie hydrophilic-hydrophobic zone structure and capillary action with improved peel strength. The capillary action is enhanced by the Wenzel-Cassie zone creation, and the barrier energy to disruption of the Wenzel-Cassie zone is increased by the capillary action. The micro-structured surfaces of the present invention create water zones of exclusion, where entropic effects reinforce Wenzel-Cassie zone stability, creating a suction effect that conforms the microstructure surface to a target surface.

Patterned surfaces with suction

An adhesive device comprising a microstructure and polymer designed to interdigitate with the surface structure of a target surface. The device may include a microstructure material having an elastomeric, crosslinked polymer which may swell in the presence of a liquid. In the pre-swell state, the device microstructure may interdigitate with a target surface microstructure. When liquid on the target surface contacts the microstructure surface of the device, the liquid may cause the microstructure surface of the device to swell. The swelling may cause the microstructure to grasp the target surface resulting in adhesion between the device and the target surfaces.

Expansion mediated adhesive device

Bio-adhesive textured surfaces and methods of making the same 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, may be 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 herein 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. Further methods of making molds to produce said devices are described herein.

Implantable superhydrophobic surfaces

The present disclosure provides microstructured hydrophobic surfaces and devices for gripping wet deformable surfaces. The surfaces and devices disclosed herein utilize a split contact Wenzel-Cassie mechanism to develop multi-level Wenzel-Cassie structures. The Wenzel-Cassie structures are separated with a spatial period corresponding to at least one wrinkle eigenmode of a wet deformable surface to which the microstructure or device is designed to contact, allowing grip of the deformable surface without slippage. Microstructures of the present invention are specifically designed to prevent the formation of Shallamach waves when a shear force is applied to a deformable surface. The multi-level Wenzel-Cassie states of the present disclosure develop temporally, and accordingly are characterized by hierarchical fluid pinning, both in the instance of slippage, and more importantly in the instance of localization. This temporal aspect to the multi-level Wenzel-Cassie state delays or prevents the transition from a wrinkled eigenmode state in a deformable surface to a buckled state in a deformable surface.

Device for dynamic fluid pinning

A device comprising a microstructured surface wherein in one aspect, the microstructured surface is arranged hierarchically with dual-functioning textured features. The surface may achieve adhesive properties by varying the parameters of the microstructure features. Additionally, the surface may achieve cellular and/or tissues in-growth functionality by varying the same parameters. Generally, the dual-functional aspect includes at least one surface feature having a varied periodicity which may be imposed on at least one other surface feature.

Multifunctional textured device

A medical composition and devices made from the composition for the delivery of extracts obtained fromgenus, similar compounds synthetically derived, and in particular derivatives of triterpenes is disclosed. The medical device may be implantable, or alternatively a device which contacts the interior of a mammalian body. The medical device may be comprised, of or present an absorbable component containingderivatives, or an eluting component. When administered into a particular body site, thecomponent may be released substantially and immediately, released slowly, or not released, into the body and residing actively on the medical device surface.

Medical device comprising boswellic acid

The present disclosure comprises micropatterned fabric, meshes, textiles, and implantable devices which may include having one substrate including a mesh, a second substrate having a microstructured surface, and a fibrous layer disposed therebetween. The fibrous layer comprises a plurality of randomly oriented fibers. The devices having the microstructured surface may include a plurality of first level microfeatures and a plurality of second level microfeatures wherein the plurality of second level microfeatures are disposed hierarchically the first level microfeatures. Also disclosed are methods for making such micropatterned fabric, meshes, textiles, and implantable devices.

Microstructured soft tissue graft

The present invention relates to textile articles and clothing such as outdoor garments, indoor garments, and commercial protective wear exposed to contact mixtures of water and oil, swimwear and winter wear exposed to mixtures of water and air. At least part of these textile articles possess a surface provided with at least one of 1) a high surface area, 2) hierarchical pattern, 3) contact angles such that hydrophilic portion of a contact mixture possesses a high contact angle and the hydrophobic portion of a contact mixture possesses a low contact angle, and 4) hysteresis angle greater than 5 degrees. Hydrophobic/Hydrophilic contact mixtures of the present invention can be surfaces where water and or ice are present in combination with oil and or air. The textile articles of the present invention resist slippage on surfaces possessing hydrophobic/hydrophilic contact mixtures.

Textiles having a microstructured surface and garments comprising the same

The present application relates to multifunctional hierarchically microstructured surfaces and three-dimensional anchored interfacial domain structures. The multifunctional properties are extremal. In one aspect the microstructured surfaces may be super-adhesive. Examples of super-adhesive mechanisms may include gas trapping, fluid trapping, and solid wrinkle trapping. In another aspect the micro structured surfaces may be nearly adhesive-less. Examples of adhesive-less mechanisms may include inter-solid surface lubrication, energy conserving fluid flows, and super-low drag phase-phase lateral displacement. The extremal structures may be obtained by anchoring mechanisms. Examples of anchoring mechanisms may include Wenzel-Cassie formation, contact angle confusion, and capillary effects.

Extremal microstructured surfaces

The present invention discloses a microstructured discrimination device for separating hydrophobic-hydrophilic fluidic composites comprising particulate and/or fluids in a fluid flow. The discrimination is the result of surface energy gradients obtained by physically varying a textured surface and/or by varying surface chemical properties, both of which are spatially graded. Such surfaces discriminate and spatially separate particulate and/or fluids without external energy input. The device of the present invention comprises a platform having bifurcating microchannels arranged radially. The lumenal surfaces of the microchannels may have a surface energy gradient created by varying the periodicity of hierarchically arranged microstructures along a dimension. The surface energy gradient is varied in two regions. In one pre-bifurcation region the surface energy gradient generates a fluid flow. In the other post-bifurcation region, there is a difference in surface energy proximal to the bifurcation such that different flow fractions are divided into separate channels in response to different surface energy gradients in each of the post-bifurcation channels. Accordingly, fluids of different hydrophobicity and/or particulate of different hydrophobicity are driven into separate channels by a global minimization of the fluid system energy.

Microstructured discrimination device

A microstructured hemostat comprising multiple layers of microstructure, each layer characterized by one or more length scales, is described. Microstructured hemostats of the present invention, can reduce the time for blood coagulation, control the morphology of the coagulation, and provide a novel diagnostic platform for evaluation of coagulation function from a morphological perspective.

Microstructured hemostat

A microstructured device is disclosed utilizing Coulomb field modification of surface energy and electroadhesion to localize a device surface or to levitate a device surface with respect to a target surface. The surface energy modification can be permanent or reversible depending on whether the charge is externally delivered to the device or derived on the device galvanically. The microstructure aspect of the device induces various hydrophilic/hydrophobic interactions with the target surface. The Coulomb field can be used to enhance or decrease the hydrophilic/hydrophobic interactions. In combination, the disclosed electro-microstructured device provides for localizing implants in a mammalian body, and additionally means for controlling cell interaction with the implant.

Microstructured field effect device

Polymer devices are disclosed with microstructured surfaces that modify their absorption pathway. Polymers which generally degrade in water by fracturing into high surface energy fragments, are modified to degrade in vivo without the formation of sharp fragments. Devices are disclosed that possess improved handling characteristics and degrade in an aqueous environment in a uniform and continuous way that favors the formation of soluble monomers rather than solid particulate. Absorbable medical implants with the disclosed surface modifications are more biocompatible, with reduced foreign body response, and dissolution into metabolizable molecular species.

Device with microstructure mediated absorption profile

The invention relates to the field of tissue engineering and regenerative medicine, and particularly to a three-dimensional biomimetic tissue scaffold that exploits the use of three-dimensional print technology. Surface energy is controlled by precisely placing polymers with differing surface chemistry, and using surface texture and bulk composition to pattern absorbable and non-absorbable polymers for the purpose of promoting functional healing in a mammalian body.

Growing community of inventors

Eurasburg, Germany

Lukas Bluecher