Abstract:
PURPOSE: An intelligent fibrin bio-adhesive with superior hemostasis effect and mechanical properties is provided to obtain an anti-bacteria property by adding natural polymer and/or antibiotics. CONSTITUTION: Fibrin and natural polymer form crosslinkage, and interpenetrating network or semi-interpenetrating network is obtained. The natural polymer is one or more selected from a group including alginate, chitosan, chitin, cellulose, agarose, amylase, dextran, proteoglycan, glycosaminoglycan, collagen, gelatin, heparin, hyaluronic acid, pectin, carrageena, chondroitin sulfate, dextran sulfate, polylysine, pullulan, carboxylmethyl chitin, and the salt of the same. Antibiotics are additionally introduced into the interpenetrating network or the semi-interpenetrating network.
Abstract:
PURPOSE: A method of manufacturing a medical stent for releasing medical drugs and a medical stent for releasing medical drugs using the same method are provided, which have the nano-structured pattern using the plasma-assisted chemical vapor deposition. CONSTITUTION: A method of manufacturing medical stent for releasing medical drug having the nano-structured pattern includes: a step of coating the surface of stent with the biodegradable polymer; a step of forming the nano-structured pattern on the surface of the stent coated with the biodegradable polymer through the ion beam or the plasma process using the method of plasma-assisted chemical vapor deposition; and a step of dipping the medical drugs within the biodegradable polymer in which the nano-structured pattern is formed. The biodegradable polymer is the biodegradable polymer in which the medical drugs are dipped.
Abstract:
A method for preparing a biodegradable porous polymer scaffold having hydroxyapatite on the surface is provided to produce the biodegradable porous polymer scaffolds having improved cell affinity and osteoconductivity in a simple and effective manner. A method for preparing a biodegradable porous polymer scaffold having hydroxyapatite on the surface includes the steps of: (1) graft-polymerizing a functional group-containing hydrophilic monomer on the surface of a biodegradable porous polymer scaffold; and (2) immersing the obtained functional group-containing polymer scaffold in a simulated body fluid solution to form hydroxyapatite on the surface of the scaffold. The functional group-containing hydrophilic monomer is selected from the group consisting of organic acids having carboxylic acids at the terminals, monomers having phosphoric acids at the terminals, and mixtures thereof.
Abstract:
A cardiovascular system transplanting metallic material is provided to improve blood compatibility by modifying the surface of the metallic material with a sulfobetaine poly(ethylene glycol) derivative having anions. A metallic material has improved blood compatibility by modifying a surface of the metallic material with a sulfobetaine poly(ethylene glycol) derivative of the formula 1, X-R1-PEG-R1-Y, where R1 is one or more functional groups connected by urethane, urea, amide, ester, ether or anhydride comprising 0 to 20 alkyl groups or aryl groups; X is -NCO or -CHO; and Y is sulfobetaine(-N^+ -R2 -SO3^-) as a zwitterionic derivative, wherein R2 is an alkyl group or an aryl group. A manufacturing method of a metallic material of which surface is modified with a sulfobetaine poly(ethylene glycol) derivative comprises the steps of: oxidizing the surface of the metallic material to introduce a hydroxyl group(-OH) into the surface thereof; and chemically bonding the sulfobetaine poly(ethylene glycol) derivative to the hydroxyl group of the metallic material surface.