An electrospinning apparatus and method for producing three-dimensional electrospun constructs is disclosed. Further, electrospinning apparatus and method 3D electrospun collagen based mineralized nanofibrous scaffold for alveolar ridge preservation prior to dental implant therapy are disclosed.

It has been established that optimizing cell seeding onto tissue engineering vascular grafts (TEVG) is associated with reduced inflammatory responses and reduced post-operative stenosis of TEVG. Cell seeding increased TEVG patency in a dose dependent manner, and TEVG patency improved when more cells were seeded, however duration of incubation time showed minimal effect on TEVG patency. Methods of engineering patient specific TEVG including optimal numbers of cells to maintain graft patency and reduce post-operative stenosis are provided. Closed, single-use customizable systems for seeding TEVG are also provided. Preferably the systems are custom-designed based on morphology of the patient specific graft, to enhance the efficacy of cell seeding.

It has been established that optimizing cell seeding onto tissue engineering vascular grafts (TEVG) is associated with reduced inflammatory responses and reduced post-operative stenosis of TEVG. Cell seeding increased TEVG patency in a dose dependent manner, and TEVG patency improved when more cells were seeded, however duration of incubation time showed minimal effect on TEVG patency. Methods of engineering patient specific TEVG including optimal numbers of cells to maintain graft patency and reduce post-operative stenosis are provided. Closed, single-use customizable systems for seeding TEVG are also provided. Preferably the systems are custom-designed based on morphology of the patient specific graft, to enhance the efficacy of cell seeding.

Provided is a bioink comprising a mixture comprising a collagen and a polysaccharide, and a polyhedral oligomeric silsesquioxane (POSS), a hydrogel matrix formed from a bioink comprising a mixture comprising a collagen and a polysaccharide, and a polyhedral oligomeric silsesquioxane (POSS), a 3D biomaterial scaffold comprising a hydrogel matrix of the disclosure as a first hydrogel layer and a hydrogel matrix of the disclosure as a second hydrogel layer, optionally having an intervening layer between the first hydrogel layer and the second hydrogel layer, and methods of forming and using same.

Provided is a bioink comprising a mixture comprising a collagen and a polysaccharide, and a polyhedral oligomeric silsesquioxane (POSS), a hydrogel matrix formed from a bioink comprising a mixture comprising a collagen and a polysaccharide, and a polyhedral oligomeric silsesquioxane (POSS), a 3D biomaterial scaffold comprising a hydrogel matrix of the disclosure as a first hydrogel layer and a hydrogel matrix of the disclosure as a second hydrogel layer, optionally having an intervening layer between the first hydrogel layer and the second hydrogel layer, and methods of forming and using same.

This document provides methods and materials for treating fistulas (e.g., refractory fistulas such as refractory anal fistulas). For example, methods and materials for implanting a synthetic scaffold (e.g., fistula plug) comprising randomly arranged fibers comprising polymers of PGA and TMC and seeded with mesenchymal stem cells (e.g., adipose derived mesenchymal stem cells) located in the spaces between the randomly arranged fibers into a fistula (e.g., refractory anal fistula) of a mammal (e.g., a human) are provided.

The present invention relates to a method of filling different two-kinds of multiple inks into an ink extruding member for a three-dimensional print and a method of three-dimensional printing using the filled ink, and relates to a three-dimensional printing method using multiple inks comprising a step of applying pressure to the retained multiple inks and extruding it into a single extruding port of the extruding part to prepare an ink extruded product and printing the ink extruded product.

The present invention relates to a method of filling different two-kinds of multiple inks into an ink extruding member for a three-dimensional print and a method of three-dimensional printing using the filled ink, and relates to a three-dimensional printing method using multiple inks comprising a step of applying pressure to the retained multiple inks and extruding it into a single extruding port of the extruding part to prepare an ink extruded product and printing the ink extruded product.

A collagen scaffold for the delivery of bioactive agents such as antimicrobials comprising a first collagen matrix layer and a second collagen matrix layer in which the first collagen matrix layer comprises a first bioactive agent physically entrapped in the first collagen matrix layer and the second collagen matrix layer comprises a second bioactive agent chemically attached to the second collagen matrix layer for an initial high concentration elution of antimicrobial from the first collagen matrix layer followed by a sustained release from the second collagen matrix layer to prevent re-infection.

A collagen scaffold for the delivery of bioactive agents such as antimicrobials comprising a first collagen matrix layer and a second collagen matrix layer in which the first collagen matrix layer comprises a first bioactive agent physically entrapped in the first collagen matrix layer and the second collagen matrix layer comprises a second bioactive agent chemically attached to the second collagen matrix layer for an initial high concentration elution of antimicrobial from the first collagen matrix layer followed by a sustained release from the second collagen matrix layer to prevent re-infection.