The present disclosure provides a method for preparing inorganic nanoparticle-gelatin core-shell composite nanoparticles, comprising: dissolving gelatin in a aqueous solution (in which inorganic nanoparticles are dispersed in) to obtain the gelatin-contained aqueous solution, dropwise adding a polar organic solvent to obtain a suspension of inorganic nanoparticle-gelatin core-shell composite particles of nanometer size or submicrometer size, then adding a cross-linking agent thereto to cross-link the gelatin components of the composite particles, followed by washing step to finally obtain inorganic nanoparticle-gelatin core-shell composite micro/nano-particles with inorganic nanoparticles as the core and gelatin as the shell. The present invention firstly provides a process for preparing the core-shell composite nano-scaled particles with inorganic nanoparticles as the core and gelatin as the shell by using a co-precipitation method which is simple and convenient, and beneficial for applying to industrial mass production.

It is a biomaterial developed from decellularized animal bone tissue and coated with a bone extracellular matrix in the form of a gel, which is capable of conferring efficient mechanical and biological support, and which can also be enriched with cells, nanocomposites or drugs, when used as a bone graft, bioreactor, or vehicle in treatments, research and development of other biomaterials; That is, it was developed from decellularized, lyophilized, porous and rigid, manipulable, safe and non-immunogenic bone material, coated and enriched with stimulating substances specific to bone tissue, presented/used in particulate or block form, thus possessing ability to promote the development of in vitro mature or progenitor cell lines when used as a bioreactor, and demonstrates a high integration capacity and a faster rate of fracture healing and filling of bone defects when used as an in vivo graft; The biomaterial also allows the promotion of cellular development, from the maintenance of the integrity of the organic extracellular matrix of the bone tissue, being able to improve healing time, reduce costs and contribute scientifically to basic research demonstrating the biotechnological importance, the investigative and applicability of decellularized organic matrices in biomaterials.

It is a biomaterial developed from decellularized animal bone tissue and coated with a bone extracellular matrix in the form of a gel, which is capable of conferring efficient mechanical and biological support, and which can also be enriched with cells, nanocomposites or drugs, when used as a bone graft, bioreactor, or vehicle in treatments, research and development of other biomaterials; That is, it was developed from decellularized, lyophilized, porous and rigid, manipulable, safe and non-immunogenic bone material, coated and enriched with stimulating substances specific to bone tissue, presented/used in particulate or block form, thus possessing ability to promote the development of in vitro mature or progenitor cell lines when used as a bioreactor, and demonstrates a high integration capacity and a faster rate of fracture healing and filling of bone defects when used as an in vivo graft; The biomaterial also allows the promotion of cellular development, from the maintenance of the integrity of the organic extracellular matrix of the bone tissue, being able to improve healing time, reduce costs and contribute scientifically to basic research demonstrating the biotechnological importance, the investigative and applicability of decellularized organic matrices in biomaterials.

Methods of regenerating vital tooth tissue in situ after endodontic therapy include introducing a hydrogel scaffold into a root canal of a tooth in a patient after native pulp has been removed from the root canal. The hydrogel scaffold may comprise a sponge scaffold, and can be acellular. The hydrogel scaffold can contain chemotactic, angiogenic, neurogenic, and/or immunomodulatory biofactors that cause infiltration of endogenous cells from the patient into the root canal. Alternatively, such biofactors/drugs can be administered to the patient separately from the hydrogel scaffold. The hydrogel scaffold can fill the periapical space of an abscessed root.

Methods of regenerating vital tooth tissue in situ after endodontic therapy include introducing a hydrogel scaffold into a root canal of a tooth in a patient after native pulp has been removed from the root canal. The hydrogel scaffold may comprise a sponge scaffold, and can be acellular. The hydrogel scaffold can contain chemotactic, angiogenic, neurogenic, and/or immunomodulatory biofactors that cause infiltration of endogenous cells from the patient into the root canal. Alternatively, such biofactors/drugs can be administered to the patient separately from the hydrogel scaffold. The hydrogel scaffold can fill the periapical space of an abscessed root.

Methods of regenerating vital tooth tissue in situ after endodontic therapy include introducing a hydrogel scaffold into a root canal of a tooth in a patient after native pulp has been removed from the root canal. The hydrogel scaffold may comprise a sponge scaffold, and can be acellular. The hydrogel scaffold can contain chemotactic, angiogenic, neurogenic, and/or immunomodulatory biofactors that cause infiltration of endogenous cells from the patient into the root canal. Alternatively, such biofactors/drugs can be administered to the patient separately from the hydrogel scaffold. The hydrogel scaffold can fill the periapical space of an abscessed root.

An artificial cornea and an associated manufacturing method are disclosed. The artificial cornea has two sides, each of which has an associated microstructure. In an embodiment, microlines can be provided on an anterior side, and a posterior side can have micropores. Both the geometry of the microstructures and their dimensions can be customized for an individual patient. The geometry of the artificial cornea itself and its dimensions can also be customized as such. In addition, the lifetime of the artificial cornea can be significantly enhanced by adding co-polymer(s) into the hydrogel to strengthen its mechanical properties. Patient recovery can be aided by adding peptides into the artificial cornea surfaces to improve cell growth post-operation.

An artificial cornea and an associated manufacturing method are disclosed. The artificial cornea has two sides, each of which has an associated microstructure. In an embodiment, microlines can be provided on an anterior side, and a posterior side can have micropores. Both the geometry of the microstructures and their dimensions can be customized for an individual patient. The geometry of the artificial cornea itself and its dimensions can also be customized as such. In addition, the lifetime of the artificial cornea can be significantly enhanced by adding co-polymer(s) into the hydrogel to strengthen its mechanical properties. Patient recovery can be aided by adding peptides into the artificial cornea surfaces to improve cell growth post-operation.

The subject invention is directed to devices and methods for producing devices for regulating blood flow in the venous system. In particular, the invention provides for artificial valves designed to regulate the flow of blood in human vessels, wherein such artificial valves include superior properties including fatigue resistance, biocompatibility, and ease of manufacture.

The subject invention is directed to devices and methods for producing devices for regulating blood flow in the venous system. In particular, the invention provides for artificial valves designed to regulate the flow of blood in human vessels, wherein such artificial valves include superior properties including fatigue resistance, biocompatibility, and ease of manufacture.