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 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 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.

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 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 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.

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 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.

Methods for removing debris and bacteria from tooth and orthopedic surfaces using irrigation solutions are provided. The solution includes disinfectant, surfactant, and organic acid components. Disinfectants such as tetracycline and doxycycline compounds can be used. Suitable surfactants include cocamidopropyl betaine compounds and polyoxypropylene-polyoxyethylene copolymers. The solution is particularly suitable for removing smear layers from tooth surfaces during root canal treatment and other dental procedures such as restoration, reconstruction, and periodontal work. The solutions also can be used to remove smear layers from bone surfaces.