351 results about "Restorative material" patented technology

The present invention relates to a tubular suture reinforcement material suitable for use in automatic suturing devices that are widely used in surgical operations, etc. More specifically, the present invention relates to a tubular suture reinforcement material with which a tubular shape is easily obtained to thereby increase its productivity, and removal of thread is easily achieved. The present invention aims to overcome drawbacks such that sheet-like materials joined by the conventional temporary adhesion easily separate from each other, and the tubular suture reinforcement material manufactured using a running stitch requires a lot of time and skill, and removal of the thread is difficult depending on the kind of sheet-like material, sewing pitch, etc. More specifically, the present invention relates to a tubular suture reinforcement material for an automatic suturing device, wherein both ends of one or two sheet-like materials are sewed using a chain stitch (intralooping stitch) with a single thread to form a tubular shape, and one or two thread ends at one or two sewing ends are suitably extended.

A self-healing material comprises a matrix embedded with micro-pockets of a healing-agent releasable by a crack in the matrix. The healing-agent is able to bond to the matrix to repair the crack. The healing-agent is contained in microcapsules. A corresponding catalyst for the healing-agent is embedded in the matrix and contained in a plurality of microcapsules as an emulsion. The emulsion comprises an oil, a perfluorated solvent, a hydrophobic ionic liquid, or mixtures thereof. A method of manufacturing the self-healing material comprises the steps of identifying an operational temperature range of the material, providing at least one substance as the healing-agent, which substance remaining substantially in a liquid state within the operational temperature range, identifying an operational evaporation rate of the healing-agent and providing the substance with a curing time according to the evaporation rate.

The present invention is directed to dental compositions that can be used as adhesives for bonding a dental material to a dental structure surface and / or as a dental restorative material. The dental composition is preferably applied to a dental structure surface under conditions effective to etch the dental structure surface.

The invention provides a saline land improvement method and belongs to the technical field of saline land improvement. The saline land improvement method comprises the following steps of locally smashing straws of plants growing in a saline land and then spreading the straws on the saline land, continuing to sequentially spread a composite microbiological material for renovation and urea on the surface of the saline land spread with smashed straws, and plowing and watering the saline land spread with the smashed straws, the composite microbiological material for renovation and the urea on the surface, wherein the composite microbiological material for renovation comprises raw material components: 4-6 parts by weight of organic manure, 2-4 parts by weight of humic acid, 0.7-3 parts by weight of agricultural organic waste, 0.2-0.4 part by weight of marine organic waste, 0.01-0.02 part by weight of liquid fungicide and 0.005-0.01 part by weight of solid fungicide. The saline land improvement method has the advantages of being low in renovation cost, small in working amount, convenient to operate and free of secondary pollution.

The invention provides a double-layered bone repairing membrane material and a preparation method thereof and in particular provides a bone repairing membrane material with antibacterial and inflammation-diminishing and bone promotion functions and belongs to the field of biological materials. The material takes biodegradable aliphatic polyester with biocompatibility and natural polymers as main raw materials and is prepared by adopting an electrostatic spinning method. The material has a double-layered membrane structure and comprises an outer layer added with an antibacterial drug and an inner layer added with a bone promotion substance. The material provided by the invention has excellent biocompatibility and a controllable and long-period medicine releasing performance; meanwhile, an outer-layer membrane of the double-layered membrane structure can be used for inhibiting bacterial infection and inflammation, which are easily caused after bone defects occur, and preventing bacteria from entering defected parts; an inner-layer membrane can be used for promoting the repairing of the bone defects. The material can be used for realizing controllable in-vivo degradation according to requirements and the material does not need to be taken out by a second surgery.

The invention is porous calcium phosphate ceramic material and the manufacturing method. It takes the calcium source and phosphate source according to Ca / P=1.00í½2.00 / 1.00 and computes the quantity of water according to the mol ratio Ca / H2O=1.00.3.00í½20.00, the hole agent / Ca=0.011í½6.00 / 1.00. adds in 0.1í½2.0mm hole agent, upgrades the temperature to 50í½1000íµ fro about 0í½24 hours, and carries on hydro-thermal process. The parameters are: pH is 5í½14, temperature 140í½360íµ, pressure 0.4í½20MPa, the insulated time 0í½24 hours.

Composite materials made from reactive compounds such as oxides are disclosed. The materials comprise a reaction producing of metal oxide, phosphate and reactive residual materials. The metal oxide may comprise MgO, CaO, ZnO, TiO2 or the like. The phosphate may comprise mono-potassium phosphate, mono-ammonium phosphate, mono-sodium phosphate or the like. The reactive residual material may be ash, phosphate clay, phosphate residual slurry, mining waste or the like. The composite materials may be used for many applications including rapid repair materials, pre-cast structures, in-situ structures, mixes and coatings.

An adhesive composition that includes a mixture of a cationically polymerizable component, an acidic component, and an initiator is provided. Preferably, the initiator comprises an iodonium salt, a visible light sensitizer, and an electron donor compound, wherein the initiator has a photoinduced potential greater than or equal to that of N,N-dimethylaniline in a standard solution of 2.9x10-5 moles / g diphenyl iodonium hexafluoroantimonate and 1.5x10-5 moles / g camphorquinone in 2-butanone. This adhesive composition is cationically polymerizable and is able to bond to hard tissue and cationic restorative materials upon curing.

This invention describes compositions containing nano-crystalline apatite useful as bone—or preferably as tooth restorative materials. The materials produced, using the composition have improved properties in the areas of esthetics, hardness, translucency, surface polishability, strength and the capability to release and to take ions up in respect of a biological environment.

A mill blank assembly for a dental prosthesis includes a milling section and a support section for supporting the assembly in a milling machine. In certain embodiments, the milling section is adhesively bonded to the support section by a direct chemical bond that provides enhanced resistance to unintentional detachment of the milling section from the support section during a subsequent machining operation. Optionally, the support section includes a passageway that receives a quantity of flowable dental restorative material used to make the milling section, such that the restorative material that is located in the passageway provides additional resistance when hardened to unintentional detachment of the milling section from the support section.

A dental composite material includes a hardenable resin matrix and a filler component. The filler component includes (a) a first plurality of preferably glass particles having an average particle size of from about 1 to about 10 micrometers; (b) a second plurality of preferably glass particles having an average particle size of from about 0.1 to about 1 micrometers; and, (c) a plurality of filler particles having an average particle size of from about 0.01 to about 0.04 micrometers. A method according to the invention includes compacting a dental composite material into a prepared tooth cavity, wherein the material has a packability index above about 300 g / mm2.

The invention relates to a calcium silicate / hydroxylapatite composite biological ceramic material and a preparation method and application thereof, belonging to the field of biological materials. Calcium silicate / hydroxylapatite nano composite powder prepared by a chemical method is used as a raw material and carried out the dry pressing and molding to obtain a material biscuit, and the biscuit is calcined at 1000-1200 DEG C for 1-10 hours to obtain a degradable calcium silicate / hydroxylapatite composite biological ceramic material which has good mechanical properties and is used for repairing the defects of hard tissues. The biological activity, the degradability and the mechanical strength of the biological ceramic material of the invention can be adjusted and controlled. The invention has simple and easy processes and convenient popularization.

A device for creating interproximal contacts of restorations placed between posterior and anterior teeth comprising a single or plurality of dental inserts which is sized and dimensioned and can be inserted into unset restorative material and compacted so as to exert lateral forces in the interproximal areas of tooth preparations thereby creating tight anatomical and functional interproximal contacts. A method of use of said dental inserts is also described.

Disclosed are porous material having hierarchical pore structure and preparation method thereof. A method of synthesizing a nanoporous material having high functionality as a support for bioactive material is combined with a three-dimensional rapid prototyping technique. Thereby, the porous material of the invention has interconnected pores of respective size regions and uneven surface corresponding to each size region, and thus conditions favorable for adhesion, division, proliferation, movement, and differentiation of cells are provided, thereby exhibiting efficient applications in various fields, in addition to bone fillers, restorative materials, and scaffolds.

A dental instrument with interchangeable roller tips for distributing restorative materials on a tooth surface quickly, precisely and homogeneously with little adherence of the restorative material to the instrument. The instrument has an elongate body with a handle portion and one or two working ends extending therefrom with a roller tip rotatably mounted on each working end. The roller tip may be removable from the working end, such that differently shaped tips may be used interchangeably during the restoration of the tooth, as necessary. The roller tip may rotate directly about the working end, or alternatively, a bushing or bearing may be rotatably mounted on the working end between the working end and the roller tip, such that the roller tip is rotatable on the working end by means of the rotatable bushing or bearing.

The bone repair material comprises the following components:A) a first granular component with a diameter larger than 20 μm chosen from the group of: calcium phosphate, calcium pyrophosphate, or calcium sulfate dihydrate;B) a second component chosen from the group of apatite powder with a particle diameter smaller than 1 μm, (preferably smaller than 100 nm); andB) a third component comprising water or an aqueous solution, wherebyC) the volume fraction of the second and third component represents at least 35 volume-% of the total bone repair material.

A composite material is provided which, while having an unusually high filler content may be extruded from a dental syringe and remains easily adaptable in the dental cavity. When materials of the present invention are cured, dental restorations are provided which have unusually high surface hardness and yield strength, as well as a low volume shrinkage on curing. This is achieved by use of a mixture of filler particles with a specific size, size range, and size relationship. Such a combination of properties makes the material of the present invention particularly useful for restoring cavities in posterior teeth.

A method of making a dental crown or bridge restoration comprises forming a precursor crown outside of a patient's mouth with a first restorative material, with a buccal contour on the buccal wall substantially the same as a buccal contour on a final crown restoration, and an open space on or around at least one of the mesial side wall or the distal side wall; and filling and securing a second material, different from the first restorative material, inside the open space or pocket of the precursor crown while outside the patient's mouth, and with the precursor crown having a strength substantially equivalent to the final crown restoration, and with the buccal contour being substantially the same as the buccal contour on the final crown, prior to filling and securing the second material.

The invention provides an alveolar bone restorative material which comprises compound bone powder and a scaffold material, wherein the compound bone powder is formed by soaking bone powder in solution of an osteoinduction material, and the ratio of the bone powder to the solution of the osteoinduction material is between 1to1 and 1to100 (mass / volume ratio); the scaffold material consists of a macromolecular substance containing carboxyl and a macromolecular substance containing amino group which crosslink and form gel upon the function of an activator, and the weight ratio of the compound bone powder and the scaffold material is between 10< -3 > to1 and 1to1. The invention also provides a preparation method and application of the alveolar bone restorative material. The material has the biological hemostasis function and bone guiding function, has certain osteoinduction activity for bone growth, and can promote the growing and reconstruction of bone tissue at the surrounding defect area of a dental implant so as to obtain an ideal interface where the implant combines with the bone; and when used for alveolar bone restoration, dental implantation and the like, the material plays a role in inducing bone restoration, hemostasis and anti-adhesion.

The present invention relates to a bone-repairing composite polymer material containing a ceramic ingredient and a preparation method thereof. The bone-repairing composite polymer material is composed of the calcium phosphate ceramic ingredient and a polybasic amino acid polymer ingredient, wherein, the mass ratio of the calcium phosphate ceramic ingredient is between 5 percent and 30 percent, and the rest is the polybasic amino acid polymer ingredient. Epsilon-aminocaproic acid is polymerized with at least two other types of amine acids to form the polybasic amino acid polymer ingredient, wherein, the mole ratio of the epsilon-aminocaproic acid in the polybasic amino acid polymer ingredient is between 50 percent and 90 percent, and the rest is the other amine acids including aminoacetic acid, lactamic acid, phenylalanine, lysine and proline. Under the protection of a inert gas, the materials, the amine acids and the calcium phosphate, are sufficiently and uniformly dispersed into water and then heated, so that various forms of waters can be removed from the materials, and finally, the materials are polymerized in two steps, respectively under a temperature between 200 DEG C and 220 DEG C and a temperature between 230 DEG C and 250 DEG C. The bone-repairing composite polymer material, which has excellent mechanical property, bioactivity, biocompatibility and controllable degradation property, can be perfectly combined with the interface of the bone tissue, and moreover, the degradation product is non-toxic and non-irritant.

The invention discloses a ferric-carbon biologic particle and a preparation method and application thereof. The preparation method of the ferric-carbon biologic particle comprises the following steps: 1) drying, smashing, pyrolyzing, grinding, sieving and washing forestry and agricultural residues to obtain charcoal; 2) soaking the charcoal in a NaOH solution to perform surface activation treatment; 3) sequentially utilizing a polyethyleneimine / ethanol solution and a glutaric acid solution to treat the charcoal with the surface activated to obtain a charcoal particle with amino grafted on the surface, 4) dispersing a soluble molysite solution or a ferrite solution into absolute ethyl alcohol, adding the charcoal particle and a NaBH4 solution, loading nanometer zero-valent iron generated in reaction on the charcoal particle to obtain the ferric-carbon biologic particle. The ferric-carbon biologic particle is good in dispersibility, high in load rate of the nanometer zero-valent iron, good in soil remediation effect, stable in effect, simple in preparation technology, low in energy consumption, low in cost, economical, practical and suitable for being widely used as a remediation material of soil which is polluted by heavy metal.

There is provided a dental composite restorative material that has an excellent opalescent effect, no paste stickiness, small polymerization shrinkage during curing and is suitable for the restoration of the incisal edge of a tooth. This dental composite restorative material comprises: (A) a polymerizable monomer, (B) a spherical silica-based particle [I] having an average particle diameter in the range of from 0.1 to 0.5 μm and a standard deviation of particle diameter distribution within 1.30, preferably a silica-titanium group oxide-composite oxide particle, (C) an organic-inorganic composite filler prepared by dispersing the above-described silica-based particle [I] in an organic resin matrix, and (D) a polymerization initiator.

A cationically curable composition for dental use containing a cationic polymerization initiator (I) and cationically polymerizable monomers (II), the cationically polymerizable monomers (II) containing an oxetane compound and an epoxy compound or an alkenyl ether compound at a ratio of amounts that satisfy the conditions expressed by the following formula, (a×A):(b×B)=91:9 to 45:55 wherein A is a mol number of the oxetane compound, “a” is an average number of the oxetane functional group contained in one molecule of the oxetane compound, B is a mol number of the epoxy compound or the alkenyl ether compound, and “b” is an average number of the epoxy functional group contained in one molecule of the epoxy compound or an average number of the alkenyl ether functional group contained in one molecule of the alkenyl ether compound. The composition is not hindered by oxygen from being polymerized, cures quickly even without using a special polymerizable monomer or a particular polymerization initiator, little forms an unpolymerized layer on the surface even when polymerized and cured in a highly humid environment such as in the oral cavity, and is suited as a filling / restorative material for dental use.

The invention relates to a self-solidification biological active material of hemigydrate calcium sulfate base, relative production and application. Wherein, the invention is characterized in that: said material is paste formed by harmony liquid, hemigydrate calcium sulfate / tricalcium silicate composite powder, while their mass ratio is 0.8-1.2:1; said harmony liquid is one of deionized water, analogue humor, inorganic salt solution or inorganic solution; the content of tricalcium silicate in the hemigydrate calcium sulfate / tricalcium silicate composite is 1-50%. The invention can be shaped freely, without cell toxicity, while it can be degraded stepped with adjustable speed, and it can induce the generation of skeleton agustite, with higher activity then calcium sulfate material.

In a method for closing a diastema and / or papilla regeneration between a first tooth and a second tooth, a dental matrix is used. The dental matrix includes a curved sectional strip of material. The strip has a length from a first end to a second end sufficient to create a form for molding a restorative material to a surface of the first tooth. The strip has a root end section and a second section integral with the root end section. The root end section of the strip is anatomic in shape such that the root end section hugs the gingival portion of the first tooth. In one form, a non-anatomic bulge is formed in the second section. The root end section of the matrix can slide to the depth of the sulcus without lacerating the tissue. After inserting the root end section of the dental matrix into the sulcus between the papilla and the gingival portion of the first tooth, a composite restorative material is placed between the dental matrix and a cervical surface of the first tooth. The composite restorative material is then cured. This creates bulbousness in the cured composite near the gum line to fill the gingival gapping.

The invention relates to the field of inorganic non-metallic materials and medical materials, and discloses a preparation method of a magnetic mesoporous phosphorite microsphere material. The preparation method adopts an in situ template sacrificial method with shell as a raw material, and comprises the following steps of: preparing magnetic calcium carbonate microspheres by using an in situ compounding technique first; and then treating the magnetic calcium carbonate microspheres by using phosphate buffer solution to convert the magnetic calcium carbonate microspheres into magnetic mesoporous phosphorite microspheres. The magnetic mesoporous phosphorite microspheres have the advantages of larger specific surface area, higher magnetic performance, high medicament controlled-release characteristics, magnetic performance, biocompatibility and bioactivity, and can be used in the field of magnetic targeting medicament carrier, magnetic thermotherapy, bone repair materials and the like; the shell is used as the raw material to reduce the cost; and the preparation processes are performed at low temperature and normal pressure, so the preparation method not only saves energy, but also generates no chemical substances which can pollute the environment.

The present invention is glass permeated zirconia ceramic dental material and its preparation process, and features that glass is permeated into quadratic porous zirconia ceramic to obtain zirconia-glass material for dental repair. The glass consists of SiO2 15-25 wt%, B2O3 10-30 wt%, BaO 0-38 wt%, La2O3 1-28 wt%, Al2O3 0-12 wt%, Y2O3 2-15 wt%, ZrO2 3-16 wt%, CaO 0-30 wt%, TiO2 0-7 wt%, CeO2 0-2 wt%, and Fe2O3 0-2 wt%. The glass is permeated to porous zirconia ceramic at 1100-1250 deg.c, and the zirconia ceramic maintains its quadratic structure. The glass permeated zirconia ceramic material is suitable for dental repair.

The invention discloses a self-repairing anti-shrink cement based composite material which comprises the following components in parts by weight: 400-800 parts of cement, 200-600 parts of waste, 400-1000 parts of sand, 264-528 parts of water, 10-70 parts of fiber, 4-10 parts of additive and polymer emulsion which accounts for 5%-10% of the gross weight of the cement. The self-repairing anti-shrink cement based composite material has good anti-shrink performance, impermeability and durability. When having a crack, the material can realize a self-repairing function under field conditions, and can be used as restorative materials for retaining walls, road mat coats, concrete pipelines, oil and gas pipelines, dams and the like.

The invention discloses a micronano bioactive glass microsphere prepared by the microemulsion technology and a preparation method thereof. The preparation method of the micronano bioactive glass microsphere includes the following steps that 1, water, ethanol, an organic solvent and a surfactant are used for preparing a mixed solution, tetraethyl orthosilicate, a catalyst, triethyl phosphate and calcium nitrate are sequentially added, and the mixture is stirred evenly to obtain a bioactive glass gel solution; 2, the bioactive glass gel solution is centrifuged and cleaned, a wet gel precipitateis obtained, and the wet gel precipitate is placed in a drying oven for drying, and bioactive glass gel powder is obtained; 3, the bioactive glass gel powder is placed in a high-temperature furnace for heat treatment, and the micronano bioactive glass microsphere is obtained. The prepared micronano bioactive glass microsphere has the advantages of being good in dispersion and uniform in particle size distribution, and is a novel bone and dental regeneration and repair material.

The invention discloses a polyether-ether-ketone composite material containing fluorapatite and titanium dioxide and a preparation method thereof, belonging to the technical field of biomedical composite materials. The composite material is a bone restoration material prepared from a polyether-ether-ketone composite material with enhanced fluorapatite and titanium dioxide and is prepared by blending fluorapatite, titanium dioxide and polyether-ether-ketone in a fusion way, wherein the fluorapatite and the titanium dioxide are respectively 10-30 percent of the total weight of the composite material, and the balance is the components of the polyether-ether-ketone. The composite material prepared from the fluorapatite, the titanium dioxide and the polyether-ether-ketone in the invention realizes good strength and toughness and consistent elastic modulus with a human bone, has bone-substitute material with bioactivity, and can overcome the defect that the traditional metal and ceramic bone-substitute material has the mechanical property which is not matched with the human bone.