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1091 results about "Tissue engineering scaffold" patented technology
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Tissue engineering scaffolds are structures made of artificial or natural substances that act as a shape on which cells can grow. The scaffold can be inert, and not interact with the cells growing on it, or it can actively help the cells to grow by releasing chemical signals.
Design methodology for tissue engineering scaffolds and biomaterial implants
A design methodology is provided for creating biomaterial scaffolds optimized for in vivo function with any 3D anatomic shape. The method creates all designs using voxel based design techniques. It also provides for optimization of implant and scaffold microstructure to best match functional and biofactor delivery (including cells, genes and proteins) requirements. The voxel based design techniques readily allow combination of any scaffold or implant microstructure database with any complex 3D anatomic shape created by CT or MRI scanners. These designs can be readily converted to formats for layered manufacturing or casting.
Owner:HOLLISTER SCOTT J +2
Biopolymer nano tunica fibrosa material capable of being biological degraded and absorbed, preparing method and uses of the same
InactiveCN101172164AGood biocompatibilityPromote degradationSurgeryFilament/thread formingFiberCellulose
The invention relates to compound millimicron fibrous membrane material of cellulose and cellulose matrix which can perform the biological degradation and the biological absorption and a preparation method thereof and an industry and medical purpose, and belongs to the biological macro-molecule non woven fabric material field which can perform the biological degradation and the biological absorption. Electrostatic spinning equipment is used to obtain the fibrous membrane material which can perform the biological degradation and the biological absorption, the weight of the cellulose is taken as basic reference, the component of the material comprises cellulose more than 0 and less than or equal to 100 weight parts, other biomacromolecule more than and equal to 0 and less than 100 weight parts, 0 to 10 weight parts of curative drug or 0 to 50 weight parts of inorganic catalyzer and / or 0 to 50 weight parts of inorganic strengthening agent. The material of the invention has good biological compatibility, biological degradation property and degradation absorptivity, and can be used for haemostasia material, wound cladding material, organization engineering supporting rack material, the transportation and release of medicine, artificial skin and blood vessel, and postoperation anti blocking material, beauty material and catalyzer carrier, filtering membrane and radiation protection material and so on.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Nano copolymer fibrous membrane material capable of being biodegraded and absorbed and preparation process and use thereof
InactiveCN1961974AOvercome the technical problem of difficult spinningSurgical adhesivesPharmaceutical containersFiberAqueous solution
The invention relates to a gelatin nanometer fiber film which can biologically degrade and absorb, and relative preparation, wherein it via the control on static spin realizes the static spin on gelatin water solution and gelatin / macromolecule mixture water, to obtain the nanometer fiber, which comprises: 0 A61L 27 / 14 A61K 45 / 00 D01D 5 / 00 D01F 1 / 00 A61L 27 / 60 A61L 33 / 06 A61L 24 / 04 A61L 15 / 22 A61F 2 / 02 2 14 3 2005 / 11 / 9 1961974 2007 / 5 / 16 000000000 Institute of Chemistry Chinese Academy of Science Beijing 100080 Han Zhichao He Aihua Li Junxing libai 31002 Shanghai Patent Agency of the Chinese Academy of Sciences No.319 Yueyang Road, Shanghai 200031
Owner:INST OF CHEM CHINESE ACAD OF SCI
Electrospun blends of natural and synthetic polymer fibers as tissue engineering scaffolds
InactiveUS20060263417A1Facilitate cell penetrationFacilitate proliferationBiocidePeptide/protein ingredientsFiberPolymer science
Non-woven fibrous scaffolds made by electrospinning from the synthetic biodegradable polymer such as, for example, poly(lactic-co-glycolic acid) (PLGA) and natural proteins, such as, for example, gelatin (denatured collagen) and elastin and a method of making thereof.
Owner:DREXEL UNIV
Tissue-engineering scaffolds containing self-assembled-peptide hydrogels
ActiveUS20080145934A1Good tissue responseSuitable mechanical propertyAnimal cellsCell culture supports/coatingPore diameterMechanical property
The present invention is directed to tissue-engineering scaffolds containing both a microporous scaffold made from a biocompatible material suitable for use in tissue-engineering scaffolds and a nanofiberous, nanoporous hydrogel formed from a self-assembling peptide, where at least a portion of the hydrogel is disposed within the pores of the microporous scaffold, thus providing tissue-engineering scaffolds having average pore diameters in the nanometer range and that provide both mechanical properties suitable for implantation into a body of a mammal and excellent tissue response once implanted in the body.
Owner:ADVANCED TECH & REGENERATIVE MEDICINE
Crosslinked, degradable polymers and uses thereof
Acrylate-terminated poly(beta-amino esters) are cross-linked to form materials useful in the medical as well as non-medical field. The polymeric starting material is combined with a free radical initiator, either a thermal initiator or a photoinitiator, and the mixture for cross-linking is heated or exposed to light depending on the initiator used. The resulting materials due to the hydrolysable ester bond in the polymer backbone are biodegradable under physiological conditions. These cross-linked materials are particular useful as drug delivery vehicles, tissue engineering scaffolds, and in fabricating microdevices. The materials may also be used as plastics, coating, adhesives, inks, etc. The cross-linked materials prepared exhibit a wide range of degradation times, mass loss profiles, and mechanical properties. Therefore, the properties of the material may be tuned for the desired use. The high-throughput approach to preparing a library of cross-linked poly(beta-amino esters) allows for the rapid screening and design of degradable polymers for a variety of applications.
Owner:MASSACHUSETTS INST OF TECH
Tissue engineering scaffolds
InactiveUS20040026811A1Interconnectivity easeEasy to controlSurgeryProsthesisInterconnectivityPorosity
The present invention relates to methods and compositions for the production of scaffolds, such scaffolds to be used for a variety of purposes, including tissue engineering. More specifically, the present invention relates to the use of fused crystals, such as fused salt crystals to form a framework. The methods for producing the scaffolds of this invention improve the porosity, interconnectivity and ease of manufacture as compared to prior art methods.
Owner:RGT UNIV OF MICHIGAN
Non-woven keratin cell scaffold
A hydratable, highly absorbent keratin solid fiber or powder capable of absorbing a large weight excess of water may be produced by partially oxidizing hair keratin disulfide bonds to sulfonic acid residues and reacting the sulfonic acid residues with a cation. The neutralized suspension can be filtered, washed, and dried, leaving keratin solid which can be shredded into fibers and further ground into powder. Addition of water to the solid produces a hydrogel. The powder or hydrogel may be useful as an absorbent material, as a therapeutic for skin, or as an excipient. The keratin materials can be incorporated into nonwoven films. The hydrogel may be used as biocompatible viscoelastic filler for implant applications. Both the hydrogel and nonwoven materials are also suitable for use as tissue engineering scaffolds.
Owner:KERAPLAST TECH LTD +1
Method and device for treating osteoarthritis, cartilage disease, defects and injuries in the human knee
InactiveUS7022506B2Heart defibrillatorsMagnetotherapy using coils/electromagnetsHuman useCells transplantation
A method of determining the voltage and current output required for the application of specific and selective electric and electromagnetic signals to diseased articular cartilage in the treatment of osteoarthritis, cartilage defects due to trauma or sports injury, or used as an adjunct with other therapies (cell transplantation, tissue-engineered scaffolds, growth factors, etc.) for treating cartilage defects in the human knee joint and a device for delivering such signals to a patient's knee. An analytical model of the human knee is developed whereby the total tissue volume in the human knee may be determined for comparison to the total tissue volume of the diseased tissue in the animal model using electric field and current density histograms. The voltage and current output used in the animal model is scaled based on the ratio of the total tissue volume of the diseased tissue of the human to the total tissue volume of the diseased tissue in the animal model and the resulting field is applied to the diseased tissue of the human using at least two electrodes applied to the knee or a coil or solenoid placed around the knee. The voltage of the signal applied to the electrodes, coil or solenoid is varied based on the size of the knee joint; larger knee joints require larger voltages to generate the effective electric field.
Owner:THE TRUSTEES OF THE UNIV OF PENNSYLVANIA
Biodegradable elastomer and method of preparing same
This invention relates to thermally crosslinked and photo-crosslinked biodegradable and biocompatible elastomeric polymers. The elastomers can be used for biomedical devices such as needles, stents, catheters, scaffolds for tissue engineering, and implantable drug delivery devices. The photo-crosslinked elastomers are particularly useful for delivery devices for proteins and peptides.
Owner:QUEENS UNIV OF KINGSTON
Coated Tissue Engineering Scaffold
The invention concerns scaffolds comprising a coating on at least one surface that partially penetrates into the void spaces of the scaffold. The invention further concerns scaffolds comprising a partially penetrated anti-adhesion absorbable membrane layer.
Owner:ETHICON INC
Tissue engineering scaffolds
The present invention relates to methods and compositions for the production of scaffolds, such scaffolds to be used for a variety of purposes, including tissue engineering. More specifically, the present invention relates to the use of fused crystals, such as fused salt crystals to form a framework. The methods for producing the scaffolds of this invention improve the porosity, interconnectivity and ease of manufacture as compared to prior art methods.
Owner:RGT UNIV OF MICHIGAN
Biomacromolecule interpenetrating polymer network hydrogel and preparation method thereof
InactiveCN104004231AHigh mechanical strengthGood biocompatibilityAerosol deliveryOintment deliveryPolymer scienceTissue repair
The invention discloses a biomacromolecule interpenetrating polymer network hydrogel and a preparation method of the biomacromolecule interpenetrating polymer network hydrogel. The biomacromolecule interpenetrating polymer network hydrogel is formed by crosslinking two kinds of enzymes in a catalysis mode, one is a polysaccharide macromolecule network formed by crosslinking polysaccharide macromolecules with introduced phenolic hydroxyl groups in an oxidation mode as oxidase and hydrogen peroxide catalyze phenolic hydroxyl groups, and the other is a protein or polypeptide macromolecule network formed crosslinking protein or polypeptide containing amino acid residues as transferase catalyzes peptide bonds. The two networks interpenetrate each other and form the novel interpenetrating polymer network hydrogel without bonding of chemical bonds. No chemical crosslinking agent is used in the hydrogel, and the hydrogel has excellent biocompatibility and mechanical property, can be shaped like a dry or wet film, like porous sponge or fibers, and can serve as a contact lens, a medicine release carrier, a scaffold for tissue engineering or materials for tissue repair.
Owner:SOUTHEAST UNIV
Advanced bio-compatible polymer surface coatings for implants and tissue engineering scaffolds
InactiveUS20100255447A1Improve bindingPromote cell adhesionOrganic active ingredientsDental implantsTissue engineering scaffoldChemistry
Disclosed herein are methodologies and compositions for coating materials, which can be used in a variety of biological applications.
Owner:THE BOARD OF TRUSTEES OF THE UNIV OF ARKANSAS
Three-dimensional fiber-based aerogel tissue engineering scaffold and preparation method thereof
The invention relates to a preparation method of a three-dimensional fiber-based aerogel tissue engineering scaffold and a product thereof. The preparation method comprises the following steps of: firstly dispersing fibers in solvents to form turbid liquid; secondly curing the turbid liquid to form cured pieces; thirdly removing cured solvents to form non-crosslinked fiber-based aerogel; finally carrying out crosslinking stabilization treatment and then carrying out sterilization treatment, thus obtaining the three-dimensional fiber-based aerogel tissue engineering scaffold. The product is a three-dimensional network-shaped material formed through mutual penetration and stagger of fibers. The fiber crossing points are effectively interconnected through non-hydrogen-bond bonding. The three-dimensional fiber-based aerogel tissue engineering scaffold has volume density of 0.1-500mg / cm<3>, average pore size of 0.01-2000mu m and specific surface area of 0.2-2000m<2> / g. The preparation method and the product have the advantages that the preparation process is simple; the raw material limitations are less; the aerogel tissue engineering scaffold product has good flexibility, connectivity and tissue growing environment and has broad application prospects in the tissue engineering field.
Owner:DONGHUA UNIV
Crosslinked, degradable polymers and uses thereof
Acrylate-terminated poly(beta-amino esters) are cross-linked to form materials useful in the medical as well as non-medical field. The polymeric starting material is combined with a free radical initiator, either a thermal initiator or a photoinitiator, and the mixture for cross-linking is heated or exposed to light depending on the initiator used. The resulting materials due to the hydrolysable ester bond in the polymer backbone are biodegradable under physiological conditions. These cross-linked materials are particular useful as drug delivery vehicles, tissue engineering scaffolds, and in fabricating microdevices. The materials may also be used as plastics, coating, adhesives, inks, etc. The cross-linked materials prepared exhibit a wide range of degradation times, mass loss profiles, and mechanical properties. Therefore, the properties of the material may be tuned for the desired use. The high-throughput approach to preparing a library of cross-linked poly(beta-amino esters) allows for the rapid screening and design of degradable polymers for a variety of applications.
Owner:MASSACHUSETTS INST OF TECH
Method and device for treating osteoarthritis, cartilage disease, defects and injuries in the human knee
InactiveUS20060190043A1ElectrotherapyMagnetotherapy using coils/electromagnetsHuman useArticular cartilage
Owner:THE TRUSTEES OF THE UNIV OF PENNSYLVANIA
Method for making a porous calcium phosphate article
InactiveUS20050184417A1Improves bioresorbabilityPretreated surfacesCeramic shaping apparatusCalcium biphosphateCompressive strength
The present invention discloses a method for making a porous calcium phosphate article including i) preparing a shaped article from a paste containing a calcium phosphate cement, a pore-forming powder and a setting liquid; ii) immersing the shaped article in an immersing liquid for a period of time so that the pore-forming powder is dissolved in the immersing liquid, creating pores in said shaped article; and iii) removing the resulting porous shaped article from the immersing liquid, wherein the resulting porous shaped article has an improved compressive strength. The porous shaped calcium phosphate article of the present invention may be used as a tissue-engineered scaffold, medical implant or a reinforcing constituent of a composite.
Owner:CALCITEC
Process for preparing biocompatible directional carbon nanotube array reinforced composite hydrogel
InactiveCN101693125AEasy to control the lengthImprove bindingImmobilised enzymesProsthesisBiocompatibility TestingNerve cells
The invention provides a process for preparing biocompatible directional carbon nanotube array reinforced composite hydrogel, which utilizes the chemical vapor deposition (CVD) technique, the radial cross linking technique and a freezing and thawing method. By permeating polymer sol into a carbon nanotube prefabricated body, aggregating and tangling problems during a compounding process of the carbon nanotube and polymer are resolved, boundary strength of a reinforcing phase and a basis phase is increased, and excellent performances of the nanotube on mechanics and electricity are played sufficiently. The composite hydrogel prepared by utilizing a physical cross linking process does not contain chemical additives and meets requirements on biocompatibility. The composite hydrogel prepared by the process has controllable length and direction of the reinforcing phase of a nanotube array, has integrated mechanics and electricity performances superior to those of the conventional hydrogel,and is adoptive to be applied to the biomedical field such as artificial articular cartilages, tissues engineering supports, nerve cell carries, biomimetic implanted electrode and the like.
Owner:UNIV OF SCI & TECH BEIJING
Method for making a porous calcium phosphate article
InactiveUS20050186354A1Improves bioresorbabilityBiocideInorganic phosphorous active ingredientsCalcium biphosphateCompressive strength
The present invention discloses a method for making a porous calcium phosphate article including i) preparing a shaped article from a paste containing a calcium phosphate cement, a pore-forming powder and a setting liquid; ii) immersing the shaped article in an immersing liquid for a period of time so that the pore-forming powder is dissolved in the immersing liquid, creating pores in said shaped article; and iii) removing the resulting porous shaped article from the immersing liquid, wherein the resulting porous shaped article has an improved compressive strength. The porous shaped calcium phosphate article of the present invention may be used as a tissue-engineered scaffold, medical implant or a reinforcing constituent of a composite.
Owner:CALCITEC
Hyaluronic acid derivative and preparation method for hyaluronic acid hydrogel
ActiveCN103724455AEasy to operateGood water solubilitySurgeryProsthesisAcid derivativePerylene derivatives
The invention discloses a hyaluronic acid derivative and a preparation method thereof. The preparation method comprises the following steps: carrying out hybrid reaction on hyaluronic acid / salt and anhydride in an anhydrous solvent, and precipitating, separating and purifying the product, so that the hyaluronic acid derivative with cross-linkable performance is obtained. The preparation method is simple in process, the reaction degree can be controlled through controlling the reaction parameter, and the product obtained through the method is stable in property, and can be kept for a long time; in addition, the obtained hyaluronic acid derivative with the cross-linkable performance can be used for preparing hyaluronic acid hydrogel under a mild condition, has an excellent biocompatibility, and can be applied to the carrier material of a bio-active substance, a tissue engineering scaffold material and a soft tissue filling material.
Owner:SICHUAN UNIV
Preparation method of three-dimensional artificial random porous structure tissue engineering scaffold
The invention relates to a preparation method of a three-dimensional artificial random porous structure tissue engineering scaffold, belonging to the technical field of biomaterials. The invention aims to solve the design and manufacturing problems of the bionic structure of tissue engineering scaffold, provides a design method for constructing a random distributed scaffold porous structure with a bionic shape under expected porosity and pore size requirements, and molds by using a 3D additive manufacturing method to produce tissue substitute. The preparation method provided by the invention has the following advantages that the scaffold has a 3D through-hole structure meeting bionic requirements, and ensures nutrient substance transfer and waste metabolism and has certain bionic mechanical properties; the porosity and pore size distribution range of the scaffold can be conveniently controlled, and the random pore structure with expected function gradient is constructed to realize the bionic characteristic of the structure; and the method is suitable for a large range of materials such as metal materials, non-metal materials and medical high molecular materials, and can meets user-personalized tissue repair requirements.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
High-strength composite nano fiber long yarn and manufacturing method thereof
InactiveCN101033563ALarge specific surface areaHigh strengthFilament/thread formingWoven fabricsFiberYarn
This invention relates to a high mightness compound nm fiber long yarn composed of a core and a cortex, in which, the core is macromolecular filament or long yarn and the cortex is bio-macromolecular nm fiber. The preparation method includes: taking macromolecular filament or long yarn as the leading silk of the core, putting a pair or multi-pair of spinnerets and enforcing DC high voltage with opposite polarities to the spinnerets with the spouts opposite, and the macromolecular solution at the top of the spinnerets is extended and whipped acted by the electric field force to form nm fiber with charges and the nm fibers ejected from the spinnerets carry opposite charges, so that they attract each other in the air to deposit on the core leading silk, and the core tracts forward to get high mightness macromolecular long yarn wrapped with nm fibers on the surface.
Owner:SOUTHEAST UNIV
Material for bone tissue engineering scaffold and making method thereof
InactiveCN101032632AImprove mechanical propertiesGood biocompatibilityBone implantBiocompatibility TestingBiological materials
The present invention relates to biological material technology, and is especially porous magnesium, magnesium alloy and composite magnesium material used as high strength biomedicine rack material for human body hard tissue defection and its preparation process. The porous magnesium, magnesium alloy and composite magnesium material used in bone tissue engineering rack has porosity of 5-99 % and pore diameter of 50-900 microns. Owing to easy degradation and absorption of magnesium inside body, the bone tissue engineering rack of porous magnesium, magnesium alloy and composite magnesium material has excellent mechanical performance and excellent biocompatibility and can provide 3D space for cell to grow.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Collagen sponge and preparation method thereof
InactiveCN102068714APromote proliferationPromote tissue repairAbsorbent padsBandagesCross-linkPorosity
The invention discloses collagen sponge and a preparation method thereof. The collagen sponge does not contain a chemical cross-linking agent, has the porosity of over 90 percent, and is prepared by performing radiation cross-linking on aqueous solution of collagen and then freeze-drying the aqueous solution of collagen; and sterilization is performed during cross-linking so that the biosafety problem caused during preparation is solved. The collagen sponge prepared by the method has no residue of chemical reagents, better biocompatibility and structural uniformity, and adjustable degradation rate and mechanical strength, and can be used as biomedical materials such as dressing, tissue engineering stents, artificial tissue components, tissue fillers, embolic agents and the like.
Owner:PEKING UNIV
Hydrogel constructs using stereolithography
InactiveUS20060237880A1Improves SL functionalityRestore vascular functionAdditive manufacturing apparatusAdditive manufacturing with liquidsCost effectivenessEngineering
A preferred embodiment of the present invention provides a method and system for building cost-efficient biocompatible hydrogel constructs using stereolithography. Hydrogel constructs may be used in, for example, multi-lumen nerve regeneration conduits and other tissue engineering scaffolds with embedded channel architecture that facilitate tissue regeneration through possible incorporation of precisely located bioactive agents, cells, and other desired inert and / or active chemical agents and devices. Another preferred embodiment of the present invention provides a method of fabricating a hydrogel construct comprising: solidifying a first solution into a first construct layer with a first energy dosage using stereolithography, the first solution comprising: a first polymer; and a first photoinitiator, wherein the first polymer and first photoinitiator are of a first concentration.
Owner:BOARD OF RGT THE UNIV OF TEXAS SYST +1
Method for making a porous calcium phosphate article
InactiveUS20050186353A1Improves bioresorbabilityPharmaceutical containersPretreated surfacesCalcium biphosphateCompressive strength
The present invention discloses a method for making a porous calcium phosphate article including i) preparing a shaped article from a paste containing a calcium phosphate cement, a pore-forming powder and a setting liquid; ii) immersing the shaped article in an immersing liquid for a period of time so that the pore-forming powder is dissolved in the immersing liquid, creating pores in said shaped article; and iii) removing the resulting porous shaped article from the immersing liquid, wherein the resulting porous shaped article has an improved compressive strength. The porous shaped calcium phosphate article of the present invention may be used as a tissue-engineered scaffold, medical implant or a reinforcing constituent of a composite.
Owner:CALCITEC
Tissue engineering complex grid shape stent forming method base on core dissolving technology
InactiveCN1654028AAddressing Biocompatibility EffectsShort processBlood vesselsManufacturing technologySpatial structure
The method of complicated tubular netted tissue engineering rack forming technology based on core dissolving technique belongs to the field of tissue engineering rack manufacturing technology. The technological process includes first designing 3D model of rack and rack core; making rack core with water soluble material without biotoxicity through fast laminated formation; compounding solution of biocompatible material with proper amount of pore creating agent and coating the solution onto the rack core; air drying, soaking in distilled water to dissolve out rack core and pore creating agent, taking out and volatilizing water and coating different forming material with or without pore creating agent successively to form the tubular netted rack with complicated spatial structure, different material gradient and different pore gradient.
Owner:TSINGHUA UNIV
Novel tissue engineered scaffolds derived from copper capillary alginate gels
InactiveUS20050196423A1Excellent property conducive to growthPromote regenerationBiocideElectrotherapyIn vivoCopper
Owner:UNIV OF FLORIDA RES FOUNDATION INC
Preparation method of an in situ pore-forming self-setting calcium phosphate composite tissue engineering scaffold
The invention discloses a making method of composite tissue engineering rack of original poring self-solidifying calcium phosphate, which comprises the following steps: placing porous rack of calcium phosphate cement into drier to dry; immersing porous rack into macromolecular solution; extracting into vacuum for 0.5-6h; injecting macromolecular material into the pore of porous rack of calcium phosphate cement; drying the surface of porous rack through filter paper; pre-freezing under -60- -4 deg.c for 1-48h; drying the frozen material to do multiple injections until the pore is filled with cement; obtaining the product.
Owner:SOUTH CHINA UNIV OF TECH
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