16 results about "Dental cement" patented technology

The present application relates to a kind of implantable fixation device and method for mouse spinal cord administration, the device includes: catheter assembly, which includes sleeve, injection inner tube and locking nut, the catheter assembly is used to carry out fixed-point infusion in spinal cord parenchyma by the bone hole opened on vertebral vertebra;Vertebra fixation assembly, which includes two V-shaped supports for clamping and fixing on the two sides of the outer periphery of vertebra;And bonding reinforcement system, which includes the initial solid seal layer formed by adhesive to realize the sealing between bone hole and catheter assembly and the structural holding adhesive resin layer formed by resin to realize the fixation between vertebra fixation subassembly and vertebra.The present application designs special vertebra fixation assembly: V-shaped support, and is combined with "biological glue preliminary adhesion" and "dental cement overall wrapping", and constructs a multi-level, rigid-flexible combined "sandwich fixation" composite fixation system.

The application discloses a kind of biomimetic mineralization dental cement with antibacterial-mineralization synergistic function and its preparation method and application.The biomimetic mineralization dental cement is constituted by solid phase system and liquid phase system:the solid phase system includes calcium phosphate-based inorganic particles and the antibacterial polysaccharide functional layer in situ constructed on the surface thereof by hydrogen bond and electrostatic interaction;the liquid phase system is ion-regulated solution containing complexing component.Antibacterial polysaccharide is induced to participate in mineral phase growth in solidification process by pre-composite process, and forms biological mineralization composite structure, so as to realize antibacterial and mineralization functions simultaneously.The material is in the form of injectable paste, and the solidification time can be adjusted within 5-240 min, the compressive strength after solidification reaches 5-30 MPa, and it has good X-ray resistance, biocompatibility and broad-spectrum antibacterial performance.The biomimetic mineralization dental cement of the application is suitable for dental root canal filling, tooth remineralization repair and periodontal tissue repair and other fields.

The present invention relates to a dental zirconia mill blank comprising a porous zirconia material, the porous zirconia material comprising Zr oxide, Y oxide, optionally Al oxide, Bi oxide, Tb oxide, Er oxide, Cr oxide, the porous zirconia material not comprising Fe oxide calculated as Fe2O3 of more than 0.01 wt. %, Mn oxide calculated as MnO2 of more than 0.005 wt. %, Co oxide calculated as Co2O3 of more than 0.005 wt. %, wt. % with respect to the weight of the porous zirconia material. The invention also relates to a process of producing such a dental zirconia mill blank and a dental restoration which can be machined from the dental zirconia mill blank. Further, the invention relates to a kit of parts comprising such a dental zirconia mill blank and a dental cement.

The utility model discloses a self-adhesive resin cement vacuum defoaming device, and relates to the technical field of vacuum defoaming devices. The device comprises a base, the top of the base is fixedly connected with a fixed box, the top of the fixed box is fixedly provided with a square box, the interior of the square box is rotatably connected with a rotating assembly, the interior of the square box is provided with a first telescopic assembly, the interior of the fixed box is provided with a second telescopic assembly, and the bottom of the second telescopic assembly is provided with a vacuum assembly. The rotating assembly is used for pushing the second telescopic assembly and the vacuum assembly to move downwards. According to the utility model, the rotating assembly is connected with the second telescopic assembly, the rotating assembly gradually pushes the second telescopic assembly to move downwards in the rotating process, and the second telescopic assembly drives the vacuum assembly to move downwards, so that the dental crown in the fixed box is surrounded by the vacuum assembly, and the size of the vacuum assembly is smaller than that of the fixed box; and under the same power, the efficiency is higher when vacuumizing is carried out in a smaller space, and the defoaming period is shortened.

This utility model discloses a ceramic cooling platform for dental cement and a disposable mixing dish, belonging to the field of dental medical devices. The device includes a ceramic cooling platform body and a disposable mixing dish for cooling. The platform body is made of ceramic material and can be refrigerated or frozen. It has an internal groove that matches the disposable mixing dish, and a small groove on top for holding liquids such as dental treatment agents. The bottom has an anti-slip design. The disposable mixing dish is made of polyethylene or polypropylene material and has a skirt-shaped support. The outer radius of its groove matches the groove of the cooling platform. In use, the cooling platform is pre-cooled before placing the disposable mixing dish on it for cement mixing. The cooling effect of the platform extends the usable time of the cement while avoiding adhesion between the dental cement and the mixing dish and the risk of infection from repeated use. This utility model solves the problems of existing mixing dishes lacking cooling function, easy adhesion, difficult cleaning, and the risk of infection, demonstrating significant practicality and innovation.

To provide a dental cement composition that combines ease of handling and storage stability, allowing it to maintain a semi-hardened state suitable for removing excess cement for a long period even after long-term storage. [Solution] The dental cement composition of the present invention comprises: polymerizable monomer (A): 100 parts by mass; filler (B): 50 parts by mass or more and 500 parts by mass or less; α-diketone compound (C); organic peroxide (D); and tertiary aromatic amine composition (E). The tertiary aromatic amine composition (E) comprises a first tertiary aromatic amine (e1) represented by general formula (1), a second tertiary aromatic amine (e2) represented by general formula (2), and a third tertiary aromatic amine (e3) represented by general formula (3).

The present invention relates to the field of dental cements used for filling, more particularly to dental cements comprising liposomes giving them a disinfectant power.

The present invention relates to the field of hydraulic cements and hardened materials obtained after hydration of said hydraulic cements, in particular cements useful in the medical field, such as dental cements. In particular, the present invention provides a hydraulic cement comprising calcium silicate particles and calcium carbonate particles having a specific particle size. Hydration of the hydraulic cement of the present invention can provide a hardened composite material having enhanced properties, comprising calcium silicate particles dispersed in a solid dispersion phase comprising calcium silicate hydrate (CSH) and a porous interparticulate region of insoluble calcium carbonate particles having a particle size of 1 nm to 1500 nm. 50 a porous interparticulate region of insoluble calcium carbonate particles having a particle size of 1 nm to 1500 nm.

A dental restoration device includes a sleeve having an exterior surface and an interior pocket that is at least partially filled with a dental cement, and a crown having an exterior surface and an interior surface that is mated to the exterior surface of the crown and bonded thereto by an adhesive disposed between the exterior surface of the sleeve and the interior surface of the crown.

The application discloses a root canal filling sealant containing eucommia ulmoides microspheres and a preparation method thereof. The root canal filling sealant is obtained by mixing component A and component B; the component A comprises eucommia ulmoides microspheres, zirconium oxide, vinyl polydimethylsiloxane and hydrogen-containing silicone oil; and the component B comprises eucommia ulmoides microspheres, zirconium oxide, vinyl polydimethylsiloxane and a platinum catalyst. The interface gap between the root canal filling sealant containing eucommia ulmoides microspheres and the dental cement is obviously smaller than that of other sealants commonly used in the current clinic, the effective combination between the homogenous materials greatly improves the interface bonding force, the interface gap problem is solved, the occurrence of microleakage is reduced, and the root canal sealing effect and the root canal treatment effect are improved.

The invention discloses biomimetic mineralization dental cement with an antibacterial-mineralization synergistic function as well as a preparation method and application of the biomimetic mineralization dental cement. The biomimetic mineralized dental cement is composed of a solid phase system and a liquid phase system, wherein the solid phase system comprises calcium phosphate-based inorganic particles and an antibacterial polysaccharide functional layer which is constructed in situ on the surfaces of the calcium phosphate-based inorganic particles through hydrogen bonds and electrostatic interaction; the liquid phase system is an ion regulation solution containing complexing components. The antibacterial polysaccharide participates in induction of mineral phase growth in the curing process through a pre-compounding process to form a biomineralization-like composite structure, so that the antibacterial and mineralization functions are synchronously realized. The material is in the shape of injectable paste, the curing time can be adjusted within 5-240 min, the compressive strength after curing reaches 5-30 MPa, and the material has good X-ray radiation resistance, biocompatibility and broad-spectrum antibacterial performance. The biomimetic mineralized dental cement is suitable for the fields of dental root canal filling, tooth remineralization repair, periodontal tissue repair and the like.

The utility model relates to a gutta-percha filling device which comprises a shell, a cylindrical heating assembly, an electric heating element on the outer surface and a gutta-percha injection needle assembly, and a driving motor and a pushing mechanism are arranged in the shell; the cylindrical heating assembly comprises a metal heat conduction cylinder and an electric heating element, the glue injection needle assembly comprises a gutta-percha bin, and the tail end of the gutta-percha bin is connected with a glue injection needle; the pushing mechanism comprises a transmission assembly and a push rod. The transmission assembly is provided with a screw. The push rod is connected with the screw rod through a crimping connection assembly; the compression joint connecting assembly comprises a plurality of radial through holes formed in the tail end of the screw rod, steel balls contained in the radial through holes, a fixing sleeve installed at the tail end of the screw rod in a pressed mode and an annular groove formed in the front end of the push rod in a digging mode, and the inner surface of the fixing sleeve and the annular groove make contact with the steel balls respectively and tightly hold the steel balls. According to the utility model, through brand new structural design and part type selection, the assembly difficulty of the device is effectively reduced, complex procedures and professional skill requirements required in the assembly process are reduced, and the production cost is further reduced.

1. Name of the designed product: gutta percha (Cupid's arrow). 2. Use of the designed product: for gutta percha. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The invention relates to the technical field of biochemistry, and particularly discloses a method for dissolving dental cement, which comprises the following steps: providing a sample attached with solidified dental cement and consumables to be recycled; placing the sample in a container or environment which can be acted by volatile organic solvent steam; providing a volatile organic solvent, and vaporizing the volatile organic solvent in the container or environment to form a steam atmosphere; exposing the sample to the vapor atmosphere for a time sufficient to soften the dental cement; after the dental cement is softened, separating the experimental consumables from the dental cement; according to the invention, the dental cement is efficiently and controllably softened by using volatile organic solvent steam, so that the nondestructive recovery of various solid-sealed expensive implantable experimental consumables can be realized, the permanent waste of precise parts such as optical fiber ferrules, electrodes and micro drivers is avoided, and the repeated purchase cost of scientific research consumables is reduced.