32 results about "Cementum" patented technology

The invention relates to adhesives, particularly to a preparation method of an environment-friendly adhesive. The environment-friendly adhesive is composed of the following raw materials including, by weight parts, 70-95 parts of phthalic anhydride, furfuryl alcohol extracted from natural plant, triethylene glycol, pentanediol, butantriol, zinc oxide, magnesium oxide, chloroprene rubber and elastic rubber, 2-3 parts of softening oil, 20-30 parts of dimethyl carbonate, benzoyl peroxide, ethyl acetate, emulsifier and flour, 5*10-5-9*10-5 parts of nano silver, and fire retardant, wherein the elastic rubber is composed of first elastic rubber and second elastic fiber which are mixed at a weight ratio of 1-3:1. The preparation method of the second elastic rubber comprises heating polyvinyl alcohol solution and waterborne polyurethane water solution, cooling the mixture to 30-50 DEG C and then adding acrylate into the mixture; then adding potassium hydroxide into the mixture and heating the mixture; then adding cementum protein, abietin and plant phenols extracted from natural plant for reaction; then adding sodium benzoate, di-tert-butyl peroxide and the ethyl acetate and mixing the reactants to obtain the environment-friendly adhesive. The environment-friendly adhesive is good in bactericidal activity and high in stability, dispersibility and adhesiveness.

The present invention provides a composition comprising a casein phosphopeptide and a bioactive material, and the bioactive material is a glass ceramic and/or a bioactive glass. The material can be made into oral care products of anhydrous system, such as an anhydrous toothpaste, mouthwash, tooth powder, a tooth gel, chewing gum, and the like. During use, the composition can effectively remineralize enamel and/or dentin damage, and block the ability to mask exposed dentin and/or cementum tubules; worn and/or etched enamel surfaces can be repaired; and the resistance of exposed and adjacent tooth structures to acid corrosion resistance to dentin sensitivity and caries prevention can be improved.

One aspect provides a method of forming a mineralized material by co-culturing a epithelial cell, such as ameloblasts, and mesenchymal cells, such as osteoblasts or odontoblasts, in a mineral-stimulating medium. Another aspect provides matrix seeded with epithelial cells and mesenchymal cells and infused with a mineral-stimulating medium capable of forming a mineralized material in the matrix. Methods of manufacturing such compositions and methods of treating mineralization-related conditions are also provided.

The invention discloses a high definition print processing method for the surface of a cementum plate and the cementum plate with prints. The processing method comprises the following steps: sanding the cementum plate: a layer of permeable primer is painted on the front of the cementum plate; processing putty; painting a layer of seal undercoat; sanding processing; painting a layer of white primer; sanding processing; painting a layer of super-white paint. The surface of the cementum plate is subjected to special pretreatment, thus colored paint and ink can be stuck on the surface of the cementum plate, and the surface of the cementum plate is provided with a variety of colors, figures or patterns, and the patterns are not easy to fall off. Therefore the cementum plate with the prints is wear-resisting, ageing resistant, not susceptible to pollution and waterproof, and has good fire prevention performance. The cementum plate with the prints is suitable for decorating the indoor wall face. The cementum plate is provided with the fire-prevention, tough, impact resistant and environment-friendly performances of the cementum plate as well as the decoration effects of high imitation wood grain, marbling, personalized patterns, and the preparation cost is lower.

The present invention is directed to methods of decalcification and tissue sample preparation that allows for the reproducible quantitative analysis of gene expression in hard tissue samples like bone, mineralizing cartilage and tendon, dentin, cementum and/or enamel that are too hard to section effectively using conventional means.

The invention discloses an enhanced silk fibroin artificial jaw scaffold. The enhanced silk fibroin artificial jaw scaffold is prepared from the components in percentage by weight: 88-96% of decalcified dentin granules, 3-9% of silk fibroin and 1-3% of PEG. The enhanced silk fibroin artificial jaw scaffold can be used in bone tissue engineering, cells are combined with scaffold materials, the defects of bone source shortage, many postoperative complications, poor biocompatibility of materials and the like are overcome, so that the face of a patient is restored well and the operation cost is reduced; the domestic silkworm silk fibroin, decalcified cementum and PEG are reasonably compounded, the obtained composite scaffold has high mechanical properties, moderate degradation rate in vivo, directional osteogenic differentiation ability, no acid degradation products, and immune rejection is reduced.

The invention discloses a guide plate for the periodontal surgery and a preparation method. The guide plate comprises a fixed-length and fixed-width guide plate which wraps and is attached to the upper jaw, a fixed-depth guide plate used for making contact with the edge of a scalpel handle to limit cutting depth of a scalpel is fixedly mounted in the position, corresponding to the upper jaw cemento-enamel junction, of the fixed-length and fixed-width guide plate through a clamping structure, and an incision used for providing motion space for a scalpel blade is arranged in the fixed-depth guide plate along the transverse gum gingiva position of the upper jaw cemento-enamel junction. With adoption of a digital technology, preoperative analysis and guide plate manufacture are carried out, the blade trend and the cutting depth are guided and limited by the fixed-length and fixed-width guide plate and the fixed-depth guide plate, and therefore, damage of important tissue in the surgery canbe avoided.

The invention relates to a lay down method for model used in detecting cell differentiation function and the method includes the following steps: (1) preparing heelpiece, enamel matrix protein (EMPs) and myeloid stroma cell; (2) covering the heelsurface of the said heelpiece with EMPs; (3) inoculating the myeloid stroma cell on the heelpiece surface obtained by step (2); (4) placing the heelpiece obtained by step (3) into the politef film pocket; (5) placing the heelpiece covered by the pocket under naked mouse skin. The advantages of this invention include connecting the cell culture in vitro and growth in vivo, insulating the impact of naked mouse cell with screen film and inspecting the impact of EMPs to the marrow stroma cell differentiation, which consequently can provide effective research model for studying EMPs application mechanism. At the 8th week of the experiment, different histological structures are formed by different processing groups and the cellular cementum samples are formed on the heelsurface trained by EMPs, which indicates that the EMPs can improve the marrow stroma cell differentiation to the cementoblastoma and also indicates that the research model is successful.

The invention belongs to the technical field of medical science and nondestructive testing, and relates to an acoustic microscopic imaging device for a tooth body. The acoustic microscopic imaging device for the tooth body comprises an acoustic lens, an acoustic excitation/receiving unit, an acoustic information processing unit, an acoustic scanning mechanism, an acoustic scanning control unit, an acoustic imaging unit and a fixed platform. According to the acoustic microscopic imaging device, the acoustic scanning mechanism is utilized to enable the acoustic lens to perform acoustic micro scanning on the tooth body and extract an acoustic wave signal and a scanning position signal of the inner part of the detected tooth body in real time; the signals are used for 2D (two dimensional) and 3D (three dimensional) acoustic microscopic imaging display of the tooth body, so that acoustic microscopic imaging of the surface and internal tissues of the tooth body is realized, and an acoustic microscopic scanning resolution ratio can reach 10 microns. Experimental application results show that the acoustic microscopic imaging device disclosed by the invention can rapidly obtain the characteristic distribution of tissues of the tooth body such as internal enamel, dentin, dental pulp and cementum and changes of the tissues of the tooth body, and can obtain relatively good actual acoustic imaging effects.

Topical application of a solution of the antimicrobial chlorhexidine to teeth, particularly including exposed root surfaces, prevents the destruction of exposed cementum and associated exposed enamel at the cementum-enamel junction on tooth root surfaces (root caries) and the inflammation of the gingival tissue. In a method of use, a topical solution containing 10% (w/v) chlorhexidine, 20% (w/v) Sumatra benzoin, and 70% (w/v) ethanol is applied to the appropriate area of the tooth surface, followed immediately by application of a sealant which is a solution containing 29% (w/v) medical-grade polyurethane in 49% (w/v) acetone and 22% (w/v) ethyl acetate. Application of the chlorhexidine and sealant to the tooth cementum and gingival margin of “at risk” older adult patients has significantly reduced the prevalence and incidence of root caries and gingival inflammation.