摘要:
Provided is a method of manufacturing an allogeneic soft-tissue transplant having autologous stem cells transplanted therein using an allogeneic soft-tissue support that is obtained from an allogeneic organism. In this regard, an allogeneic soft-tissue transplant that can replace a damaged soft-tissue of a human body is manufactured.
摘要:
The present invention relates to a process for forming a porous poly(vinyl alcohol) (PVA) scaffold using a pore-forming agent, comprising: mixing PVA with the pore-forming agent to form micropores in the PVA scaffold and using an easily decomposable pore-forming agent after the formation of the pores to improve convenience and reduce the processing time in manufacturing the porous PVA scaffold as well as to enable a pore size and porosity to be selected. A process for forming a porous PVA scaffold using a pore-forming agent according to the present invention includes heating to melt the PVA, cooling the melted PVA and mixing the PVA with a heat-decomposable pore-forming agent, repeating the freezing/thawing of the mixed PVA to cure the PVA mixture, and stirring the cured PVA mixture with a hydrochloric acid solution at a high temperature of 65° C. or more to produce foam.
摘要:
The present invention relates to a method for purifying a protein belonging to the TGF-β, superfamily, preferably BMP, and more preferably BMP-2. According to the invention, the number of purification steps is reduced and the purification process is simplified, compared to the conventional BMP-2 purification method. Thus, the time required for purification can be shortened and the cost can be reduced. In addition, the invention solves the problem that as the time for purification increases and the number of purification steps increases, BMP-2 is degraded by protease or lost during purification steps, resulting in a decrease in the final yield of BMP-2. Thus, the invention increases the final yield of BMP-2. In addition, according to the invention, although the number of purification steps is reduced, BMP-2 having high purity is obtained in high yield by optimizing and using filtrations and chromatographies, and columns, types and concentrations of buffers, and a cut-off size of membrane used in diafiltration, which are different from those of the conventional BMP-2 purification method.
摘要:
A cancellous bone graft substitute and a method of manufacturing the cancellous bone graft substitute are provided, and more particularly, a cancellous bone graft substitute and a method of manufacturing the cancellous bone graft substitute by which defatting, demineralizing, cleaning, and sterilizing processes are performed within a short time using a supersonic cabitation without damaging a surface and an inside of a bone tissue so as to further rapidly, effectively supply an allogeneic or xenogeneic bone graft substitute. Internal and external concentrations of Ca++ of the allogeneic or xenogeneic bone graft substitute are effectively removed so as to maintain physical properties of the allogenetic or xenogeneic bone graft substitute.
摘要:
A pedicle screw is provided to be inserted into and fixed to a pedicle of a spinal disease patient, and more particularly, a pedicle screw in which a screw thread of a clamp screw is formed to have dents and protrusions with trapezoid cross-sections so as to form a predetermined gap with a screw thread of a fixing unit having dents and protrusions with rectangular cross-sections when the clamp screw is combined with the fixing unit, and the screw thread of the clamp screw has different pitches to disperse an external impact so as to further firmly combine the clamp screw with the fixing unit.
摘要:
A pedicle screw is provided to be inserted into and fixed to a pedicle of a spinal disease patient, and more particularly, a pedicle screw in which a screw thread of a clamp screw is formed to have dents and protrusions with trapezoid cross-sections so as to form a predetermined gap with a screw thread of a fixing unit having dents and protrusions with rectangular cross-sections when the clamp screw is combined with the fixing unit, and the screw thread of the clamp screw has different pitches to disperse an external impact so as to further firmly combine the clamp screw with the fixing unit.
摘要:
A method for the preparation of tetragonal zirconia polycrystal composite with high toughness and low-temperature degradation resistance. The method comprising adding transformable TZP of ZrO.sub.2 --Y.sub.2 O.sub.3 --Nb.sub.2 O.sub.5 /Ta.sub.2 O.sub.5 system to non-transformable TZP of ZrO.sub.2 --Y.sub.2 O.sub.3 --Nb.sub.2 O.sub.5 /Ta.sub.2 O.sub.5 system in an amount of not more than 60% by weight based on the total weight of the resulting mixture; and sintering the mixture at above 1,500.degree. C. Even though being exposed to a temperature ranging from 100.degree. to 400.degree. C. for a long time in air, the TZP composite prepared by the present method is rarely transformed into monoclinic zirconia and yet exhibits high toughness.
摘要翻译:一种制备具有高韧性和低温降解性的四方晶氧化锆多晶复合材料的制备方法。 该方法包括以ZrO 2 -Y 2 O 3 -Nb 2 O 5 / Ta 2 O 5体系的不可转化TZP为基准,将ZrO2-Y2O3-Nb2O5 / Ta2O5系统的可变形TZP以不超过60重量%的量加入到所得混合物中; 并在1500℃以上烧结该混合物。尽管在空气中长时间暴露于100-400℃的温度下,通过本发明方法制备的TZP复合材料很少转变为单斜氧化锆, 高韧性
摘要:
Provided is a method of manufacturing an allogeneic soft-tissue transplant having autologous stem cells transplanted therein using an allogeneic soft-tissue support that is obtained from an allogeneic organism. In this regard, an allogeneic soft-tissue transplant that can replace a damaged soft-tissue of a human body is manufactured.
摘要:
The present invention relates to a method for the surface modification of a polymeric scaffold for stem cell transplantation using a decellularized extracellular matrix. The method for the surface modification of the polymeric scaffold according to the present invention can embody a biomimetic surface environment that is effective for initial cell attachment, cell growth and differentiation of stem cells by modifying the surface of the polymeric scaffold using the decellularized extracellular matrix directly derived from specific tissue cells.
摘要:
The present invention relates to a method for purifying a protein belonging to the TGF-β, superfamily, preferably BMP, and more preferably BMP-2. According to the invention, the number of purification steps is reduced and the purification process is simplified, compared to the conventional BMP-2 purification method. Thus, the time required for purification can be shortened and the cost can be reduced. In addition, the invention solves the problem that as the time for purification increases and the number of purification steps increases, BMP-2 is degraded by protease or lost during purification steps, resulting in a decrease in the final yield of BMP-2. Thus, the invention increases the final yield of BMP-2. In addition, according to the invention, although the number of purification steps is reduced, BMP-2 having high purity is obtained in high yield by optimizing and using filtrations and chromatographies, and columns, types and concentrations of buffers, and a cut-off size of membrane used in diafiltration, which are different from those of the conventional BMP-2 purification method.