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57results about How to "Meet the needs of clinical application" patented technology

Antibacterial type inorganic whisker functional composite as well as preparation method and application thereof

The invention relates to an antibacterial type inorganic whisker functional composite which is a composite consisting of antibacterial type inorganic whisker particles and acrylic polymer. The antibacterial type inorganic whisker functional composite has an application of uniformly mixing the antibacterial type inorganic whisker functional composite with an acrylic monomer mixture, surface-modified silica, a photoinitiator and a coinitiator to obtain uncured resin plaster, and curing the uncured resin plaster by a visible light or an ultraviolet light to obtain antibacterial type dental prosthesis composite resin. The antibacterial type inorganic whisker functional composite can carry out reaction through surface modification and surface covering to produce prepolymer, so that the organic-inorganic interface bonding force in the composite resin is effectively improved, the mechanical properties of the composite are improved, the bending strength is 87.4-135.3 MPa, the bending modulus is 3.16-5.82 GPa, and the mass percentage of a dissolution value is 0.02-0.08 percent per 30 days; in addition, the antibacterial type inorganic whisker functional composite has excellent antibacterial property and is safe and nontoxic; and with the adoption of the antibacterial type inorganic whisker functional composite, secondary dental caries can be effectively avoided, and the needs of clinical application are well satisfied.
Owner:CHANGZHOU HIGH TECH RES INST OF NANJING UNIV

Method for ultralow-temperature cryopreservation and resuscitation of mesenchymal stem cells

The invention provides a serum-free cryopreservation solution for mesenchymal stem cells and a method for ultralow-temperature cryopreservation and resuscitation of the mesenchymal stem cells by usingthe cryopreservation solution. Compared with a fetal calf serum containing cryopreservation solution and a cryopreservation and resuscitation method employing the fetal calf serum containing cryopreservation solution in the prior art, the serum-free cryopreservation solution and the method have the advantages that through subjecting the mesenchymal stem cells to cryopreservation by using the serum-free cryopreservation solution provided by the invention, fetal calf serum is not added during cryopreservation, and thus, risk possibly caused by introduction of heterogeneous proteins is avoided;and through adopting sealing operations and a programmed cooling box and storing cells by a gas-phase liquid-nitrogen tank, the entry of liquid nitrogen during cryopreservation is effectively reducedwhile a cryopreservation effect is ensured, so that risk of pollution during cryopreservation and tube burst during resuscitation is lowered, the motility rate of the mesenchymal stem cells after resuscitation reaches 90% or more finally, and the requirements of the mesenchymal stem cells in clinical application can be met.
Owner:和携科技有限公司

Muscular function appliance for preventing and treating early-stage dental-maxillofacial deformities

The invention discloses a muscular function appliance for preventing and treating early-stage dental-maxillofacial deformities. The basic structure of the muscular function appliance comprises a lip and cheek screen, upper and lower tooth eruption rails, lip thorns, a tongue ring, a tongue bracket, breathing holes, a lip ring hole and a lip ring. The appliance mainly corrects the bad maxillofacial muscular functions through the different designs of the parts to influence development of the maxilla and the mandible, the correcting concept is added into the appliance, and therefore the purpose of correcting the dental-maxillofacial deformities is achieved. According to the appliance, development of the maxilla or the mandible is stimulated by adjusting the height of the lip and cheek screen and the positions of the lip thorns according to the pathogenesis and the disease symptoms of a patient; the surface of the appliance is provided with the breathing holes and the lip ring hole (used by being matched with the lip ring), and the breathing holes and the lip ring hole are used for mouth breathing habit correcting and lip muscle training respectively; the tongue ring is mainly used for guiding a tongue body to be placed at the correct position to coordinate the relative position relation of the maxilla and the mandible. The prepared muscular function appliance is better in pertinence, more stable in treatment effect, more convenient to use and capable of meeting the requirements of orthodontics of the patient and clinical application.
Owner:NANJING MEDICAL UNIV

Umbilical cord mesenchymal stem cell protein-free non-programmed freezing medium and preparation method thereof

The invention relates to the technical field of stem cell culture, in particular to a protein-free non-programmed freezing medium for umbilical cord mesenchymal stem cells as well as a preparation method and application of the protein-free non-programmed freezing medium. The cryopreservation solution comprises a basic solution, a nutritional supplement, a permeable protective agent, a non-permeable protective agent, a cell sedimentation stabilizer, a cell membrane protective agent, an apoptosis inhibitor and an antioxidant, the basic solution is DMEM / F-12 with the glucose content being smaller than or equal to 1000 mg / L. The cryopreservation liquid is suitable for directly cryopreserving umbilical cord mesenchymal stem cells at-80 DEG C after in-vitro amplification and before stem cell treatment. The cryopreservation liquid is free of serum and protein and clear in chemical component, and the cryopreserved umbilical cord mesenchymal stem cells are free of exogenous pollution risk and safer to use; after the cells are recovered, the viability is high, the adherence rate is high, and the cell expansion is fast; surface marker characteristics (phenotypes) and three-line differentiation potential of the mesenchymal stem cells can be maintained; optimization is carried out according to the cryopreservation and culture characteristics of the umbilical cord mesenchymal stem cells, the cryopreservation effect is improved, programmed cooling is not needed, and time and labor are saved.
Owner:大连博格林生物科技有限公司

Non-genetically modified light control bidirectional regulation method for human umbilical cord mesenchymal stem cell proliferation

ActiveCN108624554AObviously positiveThe effect of obvious negative regulationSkeletal/connective tissue cellsElectrical/wave energy microorganism treatmentUmbilical cordMedical treatment
The invention relates to a non-genetically modified light control bidirectional regulation method for human umbilical cord mesenchymal stem cell proliferation. The method includes the steps: irradiating human umbilical cord mesenchymal stem cells at 95-105mm positions under a collimating mirror for 85-95min through the collimating mirror by the aid of blue light under the conditions of the light wavelength of 400-480nm and the light intensity of 95-105 micro-w/cm<2>, and performing negative regulation; or irradiating the human umbilical cord mesenchymal stem cells at the 95-105mm positions under the collimating mirror for 115-125min through the collimating mirror by the aid of blue light, and performing positive regulation. According to the method, the multiplication speed of the human umbilical cord mesenchymal stem cells is firstly and bi-directionally regulated only through blue light irradiation under setting of special parameters, foreign genes transferred into the stem cells areomitted, virus transfection vectors are omitted, any other substances are omitted, and the method more meets clinical application requirements of 'noninvasive light therapy' and has a wide clinical application prospect.
Owner:SHANDONG UNIV

Articular cartilage restoration and regeneration stent and preparation method thereof

ActiveCN102078642BSufficient and safe sources of donorsEase of clinical popularizationProsthesisBiocompatibility TestingBone Cortex
The invention discloses an articular cartilage restoration and regeneration stent and a preparation method thereof, belonging to the field of medical materials. The stent is made of decalcified spongiosa-cortical bone, and the decalcified spongiosa-cortical bone is provided with more than two holes penetrating through the decalcified spongiosa bone and the cortical bone. The holes are vertically arranged on the horizontal surface of the decalcified cortical bone and have diameter of 0.1-1mm. The width between hole centers is 0.5-5mm. The preparation method provided by the invention comprises the steps of: soaking the bone in a decalcified solution for decalcification; monitoring the decalcification process by using an atomic absorption spectrophotometer; carrying out X-ray and CT detection on a decalcified sample to prove that the bone is completely decalcified to obtain the decalcified spongiosa-cortical bone; drilling on the horizontal surface of the decalcified cortical bone by using laser in a diameter of 0.1-1mm; and cutting the decalcified cortical bone into a certain size, and freezing and storing. The articular cartilage restoration and regeneration stent is made of a natural collagen stent material without immunological rejection reaction, is easy to adsorb by cells, and has good biocompatibility and better mechanical strength.
Owner:BEIJING WANJIE MEDICAL DEVICE CO LTD

Method for preparing medical porous alumina based ceramic composite

The invention belongs to the field of biological ceramic materials, and discloses a method for preparing a medical porous alumina based ceramic composite. The method comprises the steps that the following materials by mass percent: 1-8% of calcium fluoride, 90-98% of alumina and 1-5% of diopside are prepared; calcium fluoride, alumina and the diopside are mixed and subjected to ball milling to form a mixed powder body; and then the mixed powder body is placed in a graphite jig for compression molding, subjected to hot pressed sintering in an argon or nitrogen atmosphere on the conditions that a sintering temperature is 1400 DEG C, a pressing temperature is 1320 DEG C, and sintering pressure is 30MPa, and subjected to temperature maintaining and pressure maintaining at 1400 DEG C for 30min. The composite prepared by the method has good mechanical property and bioactivity, and the surface of the composite is distributed with micropores, so that growth of a bone tissue is better facilitated. In addition, the method is low in production cost, and has better application prospects in repairing and replacing a bone of a human body.
Owner:SHANDONG UNIV

Sublimating and refining method for guilingji capsules preparation

The invention relates to a sublimating and refining method for traditional Chinese medicine compound prescription and particularly relates to a sublimating and refining method for a guilingji capsulespreparation. The object of the invention is to overcome the defects that a conventional technology has difficulty of controlling fire degree, is influenced by weather, may damage environment, needs long time and high labor intensity, and has difficulty of expanded production. The invention provides a sublimating and refining method for guilingji capsules, which can guarantee active components, iseasy to control in quality and is easy to promote, and prepared product guilingji capsules medicine powder thereof. The sublimating and refining method for guilingji capsules includes the following steps: (1) taking medicine powder into an alloy tank and sealing the alloy tank; (2) putting the alloy tank into a slightly larger stainless steel tank, filling the gap between the alloy tank and the stainless steel tank with coarse sand, putting a cover over the stainless steel tank and sealing the stainless steel tank with mud; (3) placing the stainless steel tank in a baking oven and heating upthe stainless steel tank, and keeping the temperature of 70+/-1 DEG C by using a temperature control system of the baking oven, and sublimating and refining continuously the medicine powder for 17 days; and (4) taking out the medicine powder to obtain the prepared product guilingji capsules medicine powder after lowering the temperature.
Owner:山西广誉远国药有限公司
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