47 results about "Smear layer" patented technology

Unitary, one-piece plastic molded micro-brushes are provided to remove the smear layer that remains in the root canal and access chamber after the pulp, bacteria, and related irritants have been mechanically and chemically removed from the root canal and access chamber using rotary cutting burs, files and various chemical reagents. The brushes include a handle, shaft or shank and a tapered brush section extending from the distal end of the shank. The brush section includes a plurality of bristles extending radially from a core. The bristles of the root canal brush can be formed in a reverse thread pattern. The brush section of the root canal brush has a diameter of between about 0.1 mm and about 0.2 mm at a tip end and a diameter of between about 0.5 mm and 3 mm at a coronal-most end. The brush section of the root canal brush is about 16 mm long, and has a taper of about 2% to about 12%. In the access chamber brush, the core can be formed as to be spherical, football-shaped, or tapered. The brushes are injection molded from an FDA approved resin.

An endodontic tool is provided to facilitate the removal of the smear layer and to enhance deep lateral cleaning of a root canal system. The tool is comprised of a sonic or ultrasonically driven activator which is made from a strong, flexible, non-metallic, and non-cutting material. The activator can be smooth. A snap-on coupler is adapted to attach the tool to a driver via a snap on action and without the use of tools. The driver will vibrate, sonically or ultrasonically, the flexible activator within a root canal of a tooth. The tool can be provided with fluid passages which allow for irrigating reagents to be delivered through the activator and into the root canal space during endodontic procedures.

An endodontic tool is provided to facilitate the removal of the smear layer and to enhance deep lateral cleaning of a root canal system. The tool is comprised of a sonic or ultrasonically driven activator which is made from a strong, flexible, non-metallic, and non-cutting material. The activator can be smooth. A snap-on coupler is adapted to attach the tool to a driver via a snap on action and without the use of tools. The driver will vibrate, sonically or ultrasonically, the flexible activator within a root canal of a tooth. The tool can be provided with fluid passages which allow for irrigating reagents to be delivered through the activator and into the root canal space during endodontic procedures.

An endodontic activator is provided to facilitate the removal of pulp tissue, the smear layer, bacteria and related irritants from a root canal system. The activator is a sonically driven activator made from a strong, flexible, non-metallic, and non-cutting material. The activator can be smooth, flocked or brush-like. The activator comprises a snap-on coupler which is adapted to attach the tool to a driver without the use of tools. The activator can be provided with fluid passages which allow for irrigating reagents to be delivered into or vacuumed from the root canal space during endodontic procedures. By inducing sonic vibrations in the activator, hydrodynamic phenomena are induced in the solution in the root canal to enhance deep lateral cleaning of the root canal system of the tooth.

An endodontic activator is provided to facilitate the removal of pulp tissue, the smear layer, and, when present, bacteria and their related irritants from a root canal system during an endodontic procedure. The activator enhances disinfection and deep lateral cleaning of a root canal system. The activator is a sonically driven activator which is made from a strong, flexible, non-metallic, and non-cutting material. The activator can be smooth, flocked or brush-like. The activator comprises a snap-on coupler which is adapted to attach the tool to a driver via a snap on action and without the use of tools. The activator can be provided with fluid passages which allow for irrigating reagents to be delivered into or vacuumed from the root canal space during endodontic procedures. By inducing sonic vibrations in the activator, hydrodynamic phenomenon are induced in the solution in the root canal to enhance deep lateral cleaning of the root canal system of the tooth.

There is provided a highly functional one-step light-curing dental adhesive composition i) based on a multifunctional prepolymer mixture of 2,2-bis-[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]propane (“Bis-GMA”) and a multifunctional prepolymer formed by substitiuting hydrogen atoms of hydroxyl groups present in Bis-GMA molecules with methacrylate groups, in which the Bis-GMA is used as a base prepolymer of conventional dental adhesive compositions; and ii) comprising and acidic monomer for removing a portion of smear layer, which is allowed to be bonded without separate treatment of acid etchant, an adhesive monomer having both hydrophobic and hydrophilic properties, a hydrophilic monomer which is allowed to be bonded in the present of moisture, an inorganic filler for improving mechanical properties, diluent, water for demineralization, a photoinitiation system and other additives.

The invention disclosed a kind of lamellar heat-proof smear layer and ceramic layer material which has the structure of calcium and titanium mine. The chemical formula of the material is BaLn2Ti3O10 in which Ln stands for one kind, two kinds or three kinds of La,Sm and Nd and 0<=x<=0.12,0<=y<=0.12. Because of the adulteration of rare earth ion and the lamellar structure of the calcium and titanium mine, the material has lower heat conductivity and higher coefficient of thermal expansion compared to the zirconium oxide which is stabilized by 7-8% yttrium oxide. After annealing the material at 1500DEG C for 168h the material can still maintain stable. The material can be designed to be heat-proof smear layer materials. The using temperature interval is ambient temperature to 1500DEG C, and the heat conductivity (1200DEG C) interval is 0.47-0.70 Wm-1K-1, the coefficient of thermal expansion (1200DEG C) interval is 11.5-14.0 10-6K-1.

The invention relates to an evaluation method of the cohesiveness performance of a self-polymeric proppant for high-speed channel fracturing, in particular to a testing method of the microscale tension of two self-polymeric proppant particles. The method mainly comprises the following steps: preparing a self-polymeric proppant sample with a uniform coating; setting the temperature state; smearing layers of asphalt on particle-fixing platforms; fixing a ceramsite proppant; precisely adjusting the working position; observing particles through a computer; resetting the tension; starting the test; retesting; treating after the test. The method overcomes the defect in traditional methods that the cohesiveness performance of the self-polymeric proppant for high-speed channel fracturing can only be qualitatively observed and evaluated but cannot be quantificationally tested, and generates certain benefits.

The invention disclosed a kind of protectant paint which is used to reduce the consumption of the graphite electrode. The ingredient of the paint includes B2O3:5-8%, MoSi2:8-15%, TiO2: 5-10%, Cr2O3:3-10%, Al2O3:3-10% and sulfonate silicon resin:40-65%. The preparing method includes the following steps: pre-melting and sintering the powder granule; pulverizing and sieving the material, the powder with -180-+300 screen mesh is group A filling while the powder with -300 screen mesh is group B filling; mixing the two groups of fillings at a ratio of 7:3 to get the solid filling; because of the add of the trace moly silicon which has similar coefficient of expansion due to heat to the graphite, the smear layer can keep similar coefficient of expansion due to heat to graphite in different temperature intervals while raising the temperature; the invention can control the grain size of the paint components to form the steady and successive smear layer with gradient structure and prevent the stripping or flaking of the smear layer so as to increase the intensity of the smear layer and realize effective protection .

This invention relates to a process of high-power electric arc thermal spraying of zinc and aluminium alloy. The process includes : first apply sand blasting on the work surface in order to remove the oxide and scale; then use the selected equipment which made up by high-power electric arc spraying coater spraying coater, air pump, and air-cooling machine to compose the thermal spraying system, use zinc and aluminium wire as strike arc to spray on the work surface; the third step is using suitable sealing-hole agent to sealing the hole on the surface of smear layer; at last use the suitable paint for hull painting of surface. This invention has no harsh requisition of purity on material, and reduces pollution.

This invention relates to a type of steel structure, supersonic speed, electric arc, aluminium painting, and anticorrosion insulation technology. First removing rust and coarsening of steel structure surface; then take the two aluminium silk of electric arc spraying coater as coating stuff, short circuit electric arc as heat source, use high pressure air to make aluminium liquid droplet. Atomize. The lance muzzle of electric arc spraying coater has convergent-divergent blast cap ,to shape the twice atomization and form supersonic speed particle jet which spray on the steel matrix to form the aluminium metal smear layer, and spray blocking smear layer on this layer to form the heavy anticorrosion insulation. Aluminium particle has high binding strength; low surface blowhole rate, smear layer well-distributed; high sedimentation rate of AL particle. This invention especially suit for iron tower's steel structure in electric communication domain.

The invention provides ozone disinfection therapeutic equipment and relates to the field of oral cavity medical equipment. The ozone disinfection therapeutic equipment comprises an ozone generator, a liquid storage tank, an ozonization tank, a liquid spraying pump, an ultrasonic generator, a therapeutic handle, a main control panel, a connecting tube, a therapeutic head, multiple infusion tubes and multiple gas tubes. The liquid spraying pump is arranged on the gas tube communicating the connecting tube with the ozonization tank. The main control panel is used for controlling on-off of the liquid spraying pump and a valve. According to the ozone disinfection therapeutic equipment, ozone and ozone water can be used for disinfection in the field of dental therapy, and the ozone disinfection therapeutic equipment has multiple functions, shows effects quickly and is quite healthy and sanitary. Besides, sound waves emitted by the ultrasonic generator are used for loosening scraps and a smear layer on the root canal wall during tooth root canal preparation so that the root canal wall can be washed and cleaned with disinfectant.

The invention discloses a 316L stainless cardiovascular stent with a hybrid medicament smear layer and its preparation method. The hybrid medicament smear layer consists of non-biodegradation elastomer, anti-hyperplasia agent, and anti-thrombus agent. Wherein, the inner layer is made up of non-biodegradation elastomer and medicaments with anti-hyperplasia effect, and the outer layer is made up of non-biodegradation elastomer and medicaments with anti- thrombus effect. The preparation process of the smear layer is that: firstly prepare the non-biodegradation elastomer, the anti-hyperplasia hybrid medicament smear layer, and the non-biodegradation elastomer smear layer orderly on the surface of the stent, and finally, use plasma technology to initiate grafting anti-thrombus medicament on the surface of the outer layer of non-biodegradation elastomer.

The invention provides an ultrasonic flushing instrument and relates to the field of oral medical instruments. The ultrasonic flushing instrument comprises a liquid storage tank, an ultrasonic generator, a first water pump, a second water pump, a recovery tank, a handle, a back suction cavity, a flushing syringe needle, a connecting pipe, a flushing head, a first supporting rod, a second supporting rod, a first switch, a second switch, a third switch and multiple infusion tubes. In the using process, the first switch is turned on, disinfectant liquid can be sprayed to root canals of the teeth of a patient, the third switch is turned on at the same time, sound waves generated by the ultrasonic generator can be used for loosening scraps and a smear layer on the root canal wall of the teeth during root canal preparation to facilitate flushing and cleaning through the disinfectant liquid, and the second switch can be turned on at the same time to suck back the disinfectant liquid in a tooth marrow cavity into the recovery tank in time. The ultrasonic flushing instrument is convenient to operate, saves time and labor, makes the time of a doctor beside a chair shorter, improves treatment quality by the doctor and economical efficiency, and relieves the pain of the patient.

The invention is about a kind of carbon / carbon compound material anti-oxidation smear layer which is constituted by the bottom layer and the outer layer. Dissolving 0.5-2g Al(OH)3 and 5-15g Zn3(PO4)2.4H2O respectively in the H3PO4 solution, adding water after the solution gets transparent, smearing the solution on the surface of carbon / carbon compound material and heating under the cover of nitrogen or vacuum to get the bottom layer. Dissolving 10-15g Na2B4O7.10H20 into 10-50ml glycerin, adding 10-50g SiO2 powder and 1-10g B powder respectively in the solution, diluting the solution and smearing it on the bottom layer of the carbon / carbon compound material, drying at 200DEG C for 1h to get the outer layer. The smear layer has good anti-oxidation effects; it is especially applicable to the protection of non-friction parts on plane's carbon / carbon compound material. The smear layer is atoxic and no stimulating smell, it's helpful to help the environment as well as the construing workers.

The present invention relates to a dental cleanser composition for improving adhesion to teeth, and more particularly to, a dental cleanser composition which functions to remove not only a smear layer from the dentin surface of an exposed tooth root, but also oral bacteria, and thus is effective in improving adhesion to teeth in periodontal surgery. The present invention provides a dental cleanser composition containing sodium ethylene diaminotetraacetate and octyl phenol ethoxylate which is a surfactant. Sodium ethylene diaminotetraacetate in the composition functions to remove a smear layer on the tooth root surface and has antibacterial activity, and octyl phenol ethoxylate in the composition functions to lipopolysaccharide. Thus, the composition improves adhesion to teeth in periodontal surgery.

An embodiment of the present invention provides a method, device and apparatus for evaluating sealability of geological faults. By simulating the formation process of faults in the target geological layer, For each state formed by geological simulation layer in the simulation process, the fault distance of fault in geological simulation layer and the thickness of mudstone smeared simulation layerin fault are obtained, and the functional relationship between the fault distance of fault in geological simulation layer and the thickness of mudstone smeared simulation layer in fault is further obtained. According to the fault distance and function relation of the target geological layer, the thickness of mudstone smeared layer in the target geological layer is obtained, and the sealing property of the target geological layer is evaluated according to the thickness of mudstone smeared layer. The evaluation method, device and device fit the parameters corresponding to a plurality of states in the formation process of the fault in the geological simulation layer to the functional relationship, avoid the defect of randomness, improve the accuracy of the prediction of the thickness of the mudstone smeared layer in the fault, and improve the accuracy of the evaluation of the sealing property of the fault.

This invention relates to a type of carbon material wolfram / iridium smear layer used for antioxygen. The feature is wolfram and carbon material contact directly to form intermediate layer, and iridium and wolfram contact directly to form surface layer.

A cleaning instrument for an endodontic procedure such as a root canal provides a distal portion for agitating an irrigant, comprising in some embodiments agitating structures that stir the irrigant to assist in removing the smear layer and dislodging loosely adhered organic debris. The structures may also be designed to assist in evacuating irrigant from the canal. Some embodiments provide orifices through which an irrigating fluid can traverse the distal portion of the instrument and enter the canal to wash away loosened debris and sterilize the canal.

The invention discloses a root canal rinsing device acting on a smear layer in dental pulp and root canal, and belongs to the field of oral cleaning. The rinsing device includes a rinsing liquid tankand a spray gun, wherein the rinsing liquid tank is arranged on a base, and is provided with a CaCO3 granule adding tube and a rinsing liquid inlet tube; a motor is installed on the rinsing liquid tank; the output shaft of the motor is connected with a stirring shaft; a plurality of groups of stirring blades are installed on the stirring shaft, and are arranged inside the rinsing liquid tank; a pump is installed on the rinsing liquid tank; the bottom end of the rinsing liquid tank is obliquely provided with a guide plate; a liquid suction pipe is arranged above the lowermost end of the guide plate, and is connected with the input end of the pump; the output end of the pump is connected with the spray gun through a liquid conveying pipe; a spray liquid gun tube is arranged at the front endof the spray gun; a probing lamp and an electron microscope probe are installed on the side wall of the front end of the spray gun. According to the rinsing device disclosed by the invention, precipitation of rinsing liquid is avoided, and the rinsing effect of the rinsing liquid is ensured; the cleaning force is increased; the effect of removing the smear layer is improved; the condition of the smear layer in the dental pulp and root canal inside the mouth is conveniently examined; the accurate rinsing of the smear layer by the rinsing liquid is convenient; the treatment of the smear layer isfacilitated; the smear layer is convenient to rinse and clean at different angles and positions; the use is convenient.

The invention disclosed a way to prepare nanometer BaLn2Ti3O10 ceramic layer material which can be used as heat-proof smear layer and the invention adopts a melting gel and coagulating gel method. The products in the invention are uniform globular and the size of the grain is less than 100nm. The ceramic layer material has lamellar calcium and titanium structure and the ingredient of the material is BaLn2Ti3O10, of which Ln stands for one kind or two / three kinds of La, Sm and Nd. The material of the invention has lower heat conductivity and higher coefficient of thermal expansion compared to the traditional zirconium oxide which is solidified by 7-8% yttrium oxide. The material can be used as the ceramic layer material for heat-proof smear layer; the using temperature interval is from room temperature to 1200DEG C.

This invention relates to a type of carbon material iridium smear layer used for antioxygen. The feature is it has two iridium smear layer: one permeates under carbon material; one deposit on the surface. The depth of infiltrated layer is 10-50um, surface layer is 50-300um. Iridium and carbon material has combined, and the ingredient forms gradient transition from infiltrated layer to surface layer and has no catastrophe of ingredient and mechanical property. The preparation of this smear layer includes follow steps: use iridium board and carbon material as cathode, vacuum chamber shell as joint using anode in the vacuum glow discharge installation; draw vacuum to ultimate vacuum, post in argon gas, light aura, and then alloy elementary particle of source electrode iridium target is sputtered and deposit on the surface of carbon material; the last step is high temperature diffusion.

The application relates to a method for testing a dental instrument comprising the steps of: a) subjecting healthy dentin tissue free from smear layer(s) to treatment with a dental instrument, thereby yielding treated dentin tissue, b) addition of a composition comprising one or more hydrazine derivative(s) to the treated dentin tissue obtained in step a), c) examining if the treated dentin tissue in step b) is stained by the one or more hydrazine derivative(s), and d) determining whether or not the treated dentin tissue contains a smear layer, wherein said one or more hydrazine derivatives is a compound of formula (I) RNHNH2 wherein R is a chemical group containing a chromophore or forming a chromophore with NHNH2. Further, the application relates to a kit of parts for detection and removal of carious dentin tissue and to a method for detection and removal of carious dentin tissue.

The invention relates to an anti-leakage treatment method at the conjunction of a pipeline and a well wall, which comprises the following steps: well mounting the pipeline on the well wall, and firstly using asphalt to carry out crack pouring treatment on a mounting crack between the pipeline and the well wall to lead the mounting crack to be filled with the asphalt; then brush-coating the asphalt at the conjunction of the pipeline and the well wall, and leading the pipeline, the well wall, an asphalt crack pouring layer filled in the mounting crack and an asphalt smear layer brush-coated at the conjunction of the pipeline and the well wall to be connected into a whole; and finally using waterproof mortar to carry out mortar finishing treatment on the periphery of the conjunction of the pipeline and the well wall. The invention further provides an anti-leakage device which comprises the asphalt crack pouring layer filled in the mounting crack between the well wall and the pipeline, the asphalt smear layer smeared on the periphery of the conjunction of the pipeline and the well wall and a mortar finishing layer smeared and covered outside the asphalt smear layer. The method and thedevice can greatly reduce the leakage phenomenon at the conjunction of the pipeline and the well wall, effectively reduce the rework phenomenon at the conjunction, improve the construction efficiencyand reduce the construction cost.

The invention relates to the field of plaster production devices, in particular to a plaster production line provided with two scrapers. The plaster production line is sequentially provided with an unguent smearing device, a detection device, an air-drying and cooling device, a cloth expanding and spreading device and a cloth winding device. The unguent smearing device comprises a smearing base plate, two scraper devices, a lifting mechanism and a PC control device. According to the plaster production line with the two scrapers, unguent is rapidly scrapped and smeared layer by layer through the multiple scraper device according to the thickness of fed unguent, the thickness of unguent in a plaster is detected by means of X-rays, and the scraper devices are adjusted according to the detected thickness value, so that the unguent smearing thickness can be controlled more rapidly, efficiently and accurately through the plaster production line, traditional Chinese medicine unguent layers inproduced plasters reach the national standard thickness value and are prevented from being too thick, the quality of the plasters is ensured, the production efficiency is improved, and the productioncost is reduced.