50 results about "Mouth repair" patented technology

The invention discloses an oral cavity restoration membrane and a preparation method thereof. The oral cavity restoration membrane uses gelatin and polycaprolactone as raw materials, which are subjected to a static spinning process respectively for obtaining a membrane formed by nanometer stage fiber; the lamination is performed in sequence of a gelatin layer, a polycaprolactone layer and a gelatin layer to obtain the three-layer structure oral cavity restoration membrane with the gradually changed fiber diameter. The preparation method of the oral cavity restoration membrane comprises the following steps of preparing a gelatin solution, preparing a gelatin membrane, drying the gelatin membrane, preparing a polycaprolactone solution, preparing a polycaprolactone membrane, drying the polycaprolactone membrane, laminating the gelatin fiber membrane and the polycaprolactone fiber membrane, and performing cutting, inner packaging, sterilization and outer packaging. The method has the advantages that the keratinized gum growth can be effectively guided; the restoration time is shortened; the membrane is applied to the oral cavity and maxillofacial soft tissue restoration in a wider range.

The invention relates to an anti-corrosive coating for metal, in particular to a photocuring joint coating provided with graphene filler and a preparing method thereof. The photocuring pipeline joint coating is composed of a low polymer, a reactive diluents (monomer), a photoinitiator, a dispersing agent and graphene, wherein graphene is evenly dispersed in the photocuring joint coating and accounts for 0.5-5% of the total mass of the composite coating. The photocuring joint coating has the advantages of being high in curing speed, high in production efficiency, free of volatile solvent, safe, free of pollution, low in energy consumption, high in tenacity, high in adhesive force, high in water resistance, high in hardness, excellent in corrosion resistance and the like and can be used for mouth repairing and mending during pipeline site operation, corrosion resistance of oil gas conveying pipelines and the like.

The invention discloses a ceramic material used for mouth rehabilitation. The ceramic material is prepared from the following components in parts by weight: zirconia, nanometer aluminum oxide, niobium pentoxide, rare earth oxide, rectorite, molybdenum boride, aluminium borate, calcium-magnesium silicate whisker and fluorapatite. The invention also discloses a preparation method of the ceramic material used for the mouth rehabilitation. The Vickers hardness of the ceramic material used for the mouth rehabilitation exceeds 21.4GPa, the bending strength of the ceramic material exceeds 963.2MPa, and the breaking tenacity of the ceramic material is higher than 16.3MPa.m1/2. The defect of the traditional ceramic material that the traditional ceramic material is likely to be subjected to brittle failure since the traditional ceramic material is crisp is eliminated, a clinic success rate is improved, and the ceramic material can be used as a mouth rehabilitation material and has a wide application prospect.

The invention relates to a prosthodontic material based on a nanometer zirconia and alumina composite ceramic, wherein the prosthodontic material is prepared from the following components by weight: 10-40 parts of alumina having a particle size of less than or equal to micrometer, 6-12 parts of alumina having a particle size of more than or equal to nanometer, 20-50 parts of zirconia having a particle size of more than or equal to nanometer, and 31-52 parts of a ceramic glass having a micro-pore size of more than or equal to nanometer. The preparation method comprises: mixing the components according to a certain ratio in the presence of a certain amount of a solvent or in the absence of a solvent, carrying out mixing ball milling or sand milling on the obtained mixture, carrying out centrifugal infiltration grouting to form a billet, and sintering the dried billet at a high temperature under a high pressure to obtain the prosthodontic material based on the nanometer zirconia and alumina composite ceramic.

The invention discloses a composite mouth-repairing structure for a counterweight layer of a large-caliber submarine pipeline. The composite mouth-repairing structure comprises a mouth-repairing anticorrosive coating, a mould layer, ring-direction high-density polyurethane foam tiles and high-density polyurethane foams, wherein the mouth-repairing anticorrosive coating is arranged on outer surfaces of steel tube reserved welding sections and tube body anticorrosive coating mouth-repairing sections of two counterweight tubes, and is connected with tube body anticorrosive coatings on the end surfaces of the mouth-repairing sections of the two counterweight tubes; the two ends of the mould layer are respectively arranged on the outer surfaces of concrete counterweight layer mouth-repairing sections of the two counterweight tubes; the ring-direction high-density polyurethane foam tiles are arranged at the periphery of the mouth-repairing anticorrosive coating; the thicknesses of the ring-direction high-density polyurethane foam tiles are smaller than those of the concrete counterweight layers by 30-50mm; and the high-density polyurethane foams are filled between the ring-direction high-density polyurethane foam tiles and the mould layer in a site casting mode, and are integrated with the ring-direction high-density polyurethane foam tiles and the mould layer to coat the outer side of the mouth-repairing anticorrosive coating. According to the technical scheme disclosed by the invention, the technical problems that open-cell polyurethane foams are cured prematurely, mould filling is incomplete and time for reaching strength required by laying is long during filling construction of the counterweight layer of the large-caliber submarine pipeline in the prior art are solved.

The invention provides a mouth rehabilitation metal dowel pin removal device, and belongs to the field of mouth rehabilitation medical devices and instruments. The mouth rehabilitation metal dowel pin removal device includes a slider, a slide hammer, a parallel rod, a movable joint, a male piece, a female piece, nuts and a screw rod, wherein one end of the slider is fixedly connected with the slide hammer, the slider and the slide hammer form an impact device, the other end of the slider is movably connected with the parallel rod, the tail end of the slider passes through the parallel rod, the tail end of the slider is mounted with the nut, the male piece is connected with the parallel rod through the movable joint, one end of the female piece is movably sleeved on the thread of a screw rod, the other end of the female piece is movably connected with the male piece in a cross manner, the male piece and the female piece form a clamping mechanism, one end of the screw rod is fixedly connected with the parallel rod, the other end of the screw rod is provided with the nut, and the parallel rod, the nut and the screw rod constitute a force-applying device. The removal device is simple in structure, convenient to operate, low in cost, and suitable for dental clinical application. The removal device has good market prospects and facilitates good application in the field of medical devices.

The invention discloses an epoxy glass fiber reinforced pipeline mouth repairing method, wherein the technological process comprises the steps of sand blasting treatment for the surface of a repaired mouth, gas treatment for the surface of the repaired mouth, corrosion resistance treatment for the surface of the repaired mouth, a PE material in a repaired mouth area is polarized by using a gas treating agent, the treatment process is simple, and the surface is uniformly treated; a corrosion resistance structure and a pipe body effectively form a whole, the corrosion resistance structure is stable in long-term performance and long in service life, a solventless coating with high temperature resistance property and a high-strength glass fiber are chosen to meet the application of the high temperature environment, and the hardness and the wear resistance property of the repaired mouth are enhanced while the intrinsic technical defects of a traditional heat shrinking sleeve (band) are overcome. The epoxy glass fiber reinforced pipeline mouth repairing method is simple in process, convenient in operation, strong in adhesive force, high in corrosion resistance performance, wide in scope of applicable temperatures, and convenient in popularization and application.

The invention provides a mouth-repairing modified polyurea coating in a petroleum pipeline which realizes mouth-repairing construction at the low temperature, and fills up the domestic blanks. The mouth-repairing modified polyurea coating in the petroleum pipeline is characterized in that the modified polyurea coating is prepared from a component A and a component B, wherein the component A is prepared from the following ingredients in parts by mass: 25-35 parts of carbodiimide modified MDI, 20-30 parts of modified polymer, 40-50 parts of hydroxy polyether and 5-10 parts of a functional assistant, and the component B is prepared from 25-35 parts of D-2000, 10-20 parts of T-5000, 2-8 parts of D-230, 10-20 parts of DETDA, 10-20 parts of DMTDA and 1-5 parts of functional filler. The mouth-repairing modified polyurea coating in the petroleum pipeline is long in service life, environmentally friendly and free of pollution, and can adapt to outdoor low temperature environments, in particularto mouth-repairing construction at the low temperature (-20 DEG C).

The invention discloses an air-jet loom profiled steel reed defect mouth repairing process which comprises the following steps of: (1) checking the two ends of a profiled steel reed airflow groove, and determining the defect mouth position of the profiled steel reed airflow groove; (2) adopting a grinding tool to grind the defect mouth position of the profiled steel reed airflow groove to and forth along the profiled steel reed length direction until the two edges of the defect mouth are in smooth transition; (3) rubbing a ground surface (which is caused by grinding) to and fro by using a honing stick so as to remove defective wools of the ground surface; (4) using an abrasive belt to penetrate through a gap between profiled steel reed sheets within a ground surface range, and utilizing the friction of the abrasive belt and the side walls of the profiled steel reed sheets to remove residual defective wools; and (5) polishing the ground surface of a profiled steel reed on an air sand blaster, and ensuring the ground surface to be smooth and fine. With the adoption of the repairing process, the profiled steel reed can be repaired, and the repaired profiled steel reed can satisfy the normal use of an air-jet loom.

The invention relates to a manufacturing method for a steel inter-anticorrosion-mouth-repair-free elbow. The manufacturing method comprises the following steps that the elbow is prepared; four short pipes with the same length are cut, and two of the short pipes are used as the short pipes for field connection; a stainless steel welding wire is used as a surfacing material, a stainless steel layer is arranged on the inner wall of one end of each short pipe in a surfacing manner, and anticorrosion alloy pre-mouth-repair layers are formed; and grooves and surfacing transition regions are machined; the non-surfacing ends of the two connecting short pipes are welded to the two ends of the elbow, and the straight pipe ends are formed; and during the field elbow connection, the other two short pipes are correspondingly welded to the straight pipe ends of the two ends of the elbow, anticorrosion coating is conducted on the inner walls of welding seams, and continuous anticorrosion layers are formed. The manufacturing method has the beneficial effects that the bottleneck problem of the steel pipeline elbow welding seam inner anticorrosion technology is solved, the internal anticorrosion factorization of the elbow welding seams is achieved, and the pipeline construction efficiency is improved; the pipeline corrosion prevention and construction cost is lowered, and the service life of the pipeline is prolonged; and the environment protection and safety risks caused by the corrosion leakage of the pipeline elbow welding seams are lowered.

The invention relates to a two-stage method for repairing dead ports and joints without internal anti-corrosion for steel pipelines. The method includes the following steps: (1) Processing steps of connecting short pipes: (1) Cutting two sections of short steel pipes according to the steel pipe specifications specified in the design; (2) Surfacing stainless steel material on the inner wall circumference of the pipe end by a surfacing machine; (3) Lathe Process the anti-corrosion alloy pre-filling layer and the bevel at both ends of the short pipe; (2) The steps of connecting the dead ends of the pipeline on site: respectively weld the non-surfacing end of the short pipe to the pipes at both ends; After the anti-corrosion filling treatment, use the same welding material as the pre-filling welding to weld the dead seam. The beneficial effects are: the present invention can realize the elimination of internal anti-corrosion repairing of steel pipe dead ends through two sections of pre-welding surfacing welding short pipes, solves the technical bottleneck of internal anti-corrosion repairing of pipe dead ends, and simplifies the connection of internal anti-corrosion pipeline dead ends. The head process reduces the construction cost of the internal anti-corrosion steel pipe dead end connection.

The invention belongs to the field of materials, and particularly relates to a preparation method of a zirconia biological ceramic for oral cavity repair, wherein the raw materials comprise, by weight, 20-30 parts of zirconia, 10-15 parts of nanometer alumina, 10-15 parts of nanometer magnesium oxide, 10-15 parts of nanometer titanium oxide, 5-10 parts of nanometer zinc oxide, 5-10 parts of boronoxide, 5-10 parts of sodium titanate, and 5-10 parts of hydroxyapatite. According to the present invention, the prepared zirconia biological ceramic as the novel fine ceramic has advantages of good mechanical properties (fracture toughness, strength, hardness and the like), good biocompatibility, good stability, good aesthetic property, good thermal conductivity and good formability, can well solve the problem of insufficient strength and insufficient toughness of conventional all-ceramic crown materials, has mechanical properties comparable to metals, and can completely bear the chewing forceof posterior teeth.

The invention relates to an oral restoration and correction auxiliary device and provides a novel orthodontic bracket adhesive removing mode. Laser is adopted for ablating the surface of an orthodontic bracket, plasma is formed, and adhesive is removed; meanwhile, the plasma produced when the adhesive is removed is utilized for performing laser breakdown spectroscopy analysis, removed components are obtained, and the removing process can be monitored in real time; and a novel gas detecting method is designed by the invention when the adhesive is removed, gas is introduced into a spherical integrator, light absorption detection is performed in the integrator, and detection results are made more accurate.

The retractor is a generally U-shaped device for protecting the cheek and tongue from instruments used during dental and prosthodontic procedures. The retractor has a planar base defined by two spaced arms, a pair of upright shields extending from the arms, and a posterior connector connecting the shields. The base is contoured to grip the tooth adjacent to the tooth to be treated, and thereby, secure the retractor within the patient's mouth.