摘要:
It is to provide an implant with shock-absorbing property that is able to be strongly secured in a living body as well as a manufacturing method of such implant.The implant comprising: a substrate; a first film on the substrate, which is comprised of a polymer and has a functional group that enables adsorption of calcium ions; and a second film formed on the first film and being comprised of calcium phosphate. The manufacturing method of the implant comprising: forming said first film on a substrate; and subsequently, dipping the substrate in a calcium ion solution and in a phosphate ion solution alternately as to form the second film.
摘要:
Microspheres comprising polylactic acid and a water soluble physiologically active substance and having a mean particle size of from about 0.01 .mu.m to 300 .mu.m, which show not more than 30% of an eluted amount of said physiologically active substance based on the content of said physiologically active substance in the polylactic acid type microspheres after 24 hours in in vitro elution test in phosphate buffer of pH 7.4 at 37.degree. C., and a process for preparing the same. The polylactic acid type microspheres of this invention is advantageous in that the active substance can be uniformly incorporated into the microspheres without loss of the activity, can gradually release the active substance for a long time of period of more than one week.
摘要:
A soft contact lens of PVA having a tensile strength of not less than 10 kg/cm.sup.2, a water content ranging from 40 to 95% by weight, a visible light transparency of not less than 90%, and an oxygen permeability of not less than 30.times.10.sup.-11 cm.sup.3 .multidot.(STP).multidot.cm/cm.sup.2 .multidot.sec.multidot.mmHg. This soft contact lens can be prepared by forming a solution of PVA in a mixed solvent of water and an organic solvent, pouring the PVA solution in a mold having a shape of contact lens, and crystallizing at a temperature of not more than ordinary temperature. The soft contact lens has a high mechanical strength, high water content, high transparency and high oxygen permeability.
摘要:
An ultra high molecular weight polyethylene molded article for artificial joints has molecular orientation or crystal orientation in the molded article, and is low in friction and is superior in abrasion resistance, and therefore is available as components for artificial joints. Further, the ultra high molecular weight polyethylene molded article for artificial joints can be used as a component for artificial hip joints (artificial acetabular cup), a component for artificial knee joints (artificial tibial insert) and the socket for artificial elbow joints, and in addition to the medical use, it can be applied as materials for various industries by utilizing the characteristics such as low friction and superior abrasion resistance.
摘要:
Medical-use two-part adhesive comprising; first part comprised of an aqueous solution or a powder of aldehyde-groups-introduced alpha-glucan; and second part comprised of an aqueous solution or a powder of amino-groups-containing polymer that is formed of a polymer chain of amino-group-containing units and has a molecular weight in a range of 1000 to 20,000; as well as medical-use hydrogel resin obtained by curing the adhesive. A mixture of the first and second parts, at a time of mixing them to form the hydrogel has pH in a range of 5.0 to 8.0. In a preferred embodiment, the amino-groups-containing polymer is epsilon-poly-L-lysine produced by microorganism or by enzyme.
摘要:
The invention is directed to an anergy-inducing cellular composition comprising: cells having antigenic determinants on the cell surface and an anergy-inducing compound [e.g., (−)-epigallocatechin-3-o-gallate (EGCG)] attached by its chemical affinity to the antigenic determinants. In one embodiment, the anergy-inducing compound blocks co-stimulatory molecules among the antigenic determinants of the cells, which upon encountering with T-cell renders the latter anergic, that is, unresponsive toward alloantigens. In another embodiment, EGCG is of high purity for its efficient attachment to the antigenic determinants. The anergy-inducing cellular composition is prepared by immersing the cells in a culture media solution (RPMI 1640) containing 50-500 ppm EGCG at low physiological temperatures for one to two hours to minimize the cells' mortality. A specific use of the resulting anergic cellular composition is suggested, which is the attenuation of two undesirable acute allogenic responses resulting from major histocompatibility disparity, namely, transplant rejection and GVHD.
摘要:
A bone fixation material has an initial bending strength at break of more than 250 MPa, maintains its strength more than 3 months in a living body organism and has the characteristic of biodegrading and bioabsorbing into and disappearing from the organism within a range of 6 months to 3 years. The material comprises a polymer with the characteristic of biodegrading and bioabsorbing into the living body organism, a hydroxyapatite and an alkaline inorganic compound.
摘要:
An adhesive composition for surgical use including an .alpha.-cyanoacrylate adhesive composition with a polymer characteristic for biodegrading and bioabsorbing the adhesive into the body of a living organism. It is preferred that the polymer is a co-polymer of DL-lactic acid and .epsilon.-caprolactone or a co-polymer of DL-lactic acid, ethylene glycol and .epsilon.-caprolactone, or a co-polymer of ethylene glycol and .epsilon.-caprolactone.
摘要:
A soft contact lens of PVA having a tensile strength of not less than 10 kg/cm.sup.2, a water content ranging from 40 to 95% by weight, a visible light transparency of not less than 90%, and an oxygen permeability of not less than 30.times.10.sup.-11 cm.sup.3.(STP).cm/cm.sup.2.sec.mmHg. This soft contact lens can be prepared by forming a solution of PVA in a mixed solvent of water and an organic solvent, pouring the PVA solution in a mold having a shape of contact lens, and crystallizing at a temperature of not more than ordinary temperature. The soft contact lens has a high mechanical strength, high water content, high transparency and high oxygen permeability.
摘要:
Transdermal dosage compositions are prepared from hydrated poly(vinyl alcohol) gels and pharmacologically active substances without any chemicals such as crosslinking agents and catalysts. Heating process is not involved in the gel preparation. High water contents of the gels enable the stratum corneum to be swollen, resulting in high permeation of drugs through the skin.