Absorbable composite medical devices such as surgical meshes and braided sutures, which display two or more absorption/biodegradation and breaking strength retention profiles and exhibit unique properties in different clinical settings, are made using combinations of at least two types of yarns having distinctly different physicochemical and biological properties and incorporate in the subject construct special designs to provide a range of unique properties as clinically useful implants.

Provided is a non-tubular brain damage recovery material which is used to cover and/or fill a damaged part of the brain, the brain damage recovery material including: (A) a cross-linked body with which a bioabsorbable polysaccharide having a carboxyl group in a low endotoxin molecule is covalently bonded and cross-linked with at least one crosslinking reagent selected from among a compound represented by general formula (I) and salts thereof; and (B) a bioabsorbable polymer. R.sup.1HN(CH.sub.2).sub.nNHR.sup.2 (I) [in the formula, R.sup.1 and R.sup.2 each independently represent a hydrogen atom or a group represented by formula of COCH(NH.sub.2)CH.sub.2].sub.4NH.sub.2, and n represents an integer from 2 to 18]. Accordingly, provided is a medical material which can recover a damaged part of the brain.

Provided herein is a biocompatible protein, and biocompatible protein gel and conductive protein gel including the biocompatible protein, and preparing method thereof, the amino acid sequence of the biocompatible protein being Lys-X-Lys-Glu-X-Phe-Phe-X-Lys-Glu-X-Phe-Phe-X-Lys-Glu-X-Tyr, X being any one or more of hydrophobic amino acids, and the method including synthesizing a protein that causes no rejections from human bodies and that is not easily degradable, thereby providing an advantage of being utilized as a conductive biomaterial having biocompatibility and biodegradability in regenerative medical fields such as 3D bioprinting.

A method for preparing a chitosan complex film comprises: (1) reacting polyvinyl alcohol-124 with butanedioic anhydride to obtain a modified polyvinyl alcohol; (2) formulating the modified polyvinyl alcohol-124 into a 0.4 wt % aqueous solution, then adding the aqueous solution containing 0.4 wt % of modified polyvinyl alcohol-124 dropwise into an acetic acid solution at a concentration of 0.4 wt % chitosan to obtain a mixed solution; (3) adjusting the pH value of the mixed solution with a 0.01 wt % NaOH solution to pH 5.5, and removing surface bubbles after standing for one hour to obtain a casting solution; (4) pouring the casting solution into a culture dish, placing the culture dish into an oven at 60 C. and drying to a constant weight to obtain the chitosan complex film. The materials used in the method are inexpensive, and the reaction is not complicated, so the cost of the product is not high.

Mono- and multi-layered implants include at least one porous layer made from a freeze dried aqueous solution containing chitosan, the solution having a pH of less than about 5.

A bioresorbable triblock copolymer according to Formula 1

R-B-A-B-R(1)

wherein A is a hydrophilic polymer, B a hydrophobic polymer and R are end-groups, wherein R is H or a C1-C30 organic moiety and wherein the copolymer is fluid in a temperature range of 0 C. to 37 C. A pharmaceutical composition including the triblock copolymer and at least one therapeutically active agent. The copolymer and pharmaceutical composition can be used for forming a depot in a human or animal body or as medical device.

Tissue fillers derived from decellularized tissues are provided. The tissue fillers can include acellular tissue matrices that have reduced inflammatory responses when implanted in a body. Also provided are methods of making and therapeutic uses for the tissue fillers.

A shaped transplant product 10 derived from human umbilical cord 2 has a collagenous tissue membrane 20 derived from an umbilical cord 2 made essentially of thick collagenous tissue which is shaped to form a soft tissue barrier or wound covering or other internal or external wound healing attachment. The shaped transplant product 10S has a defined memory shape that can be configured to pass through a hollow cylindrical trocar or arthroscopy device for implantation. The defined memory shape can be a hollow elongated split tube. The split tube along the split can have abutting edges. The split tube can have an open split forming a gap between edges adjacent the open slit. The split tube can have overlapping edges. The split tube can have an elongated body having a center portion tapering toward opposing smaller ends to form a pre-set shape.

A transplant product derived from human umbilical cord has a collagenous tissue membrane derived from an umbilical cord, configured as a soft tissue barrier or wound covering or other internal or external wound healing attachment. The structural, chemical and biochemical properties are retained, the collagenous tissue membrane is cleaned removing the veins, arteries and Wharton's jelly without exposure to harsh chemicals. The collagenous tissue membrane is soaked in normal saline solution under mild agitation for a predetermined time to structurally increase tear resistance of the membrane. The collagenous tissue membrane is free of meconium. The collagenous tissue membrane has a general transparent or translucent appearance of a clear or slightly pink color. In one embodiment, the transplant product has one or more suture entry sites to facilitate suturing the product to tissue.

In one embodiment, the present invention provides a composition, wherein the composition is a porous scaffold, wherein the pores of the scaffold are from 1 to 500 microns, the composition comprising: a) a cross-linkable protein selected from the group consisting of collagen and gelatin; b) a cross-linker which induces cross-linking of the cross-linkable protein; and c) a liquid.