227 results about "Root Canal Filling Materials" patented technology

A device, method and composition of matter for use in mobilizing a medicament into the dentinal wall of a tooth comprising depositing a charged substance within a cavity of a tooth and subjecting the substance to an electric charge.

Systems and methods for using a liquid jet apparatus for dental treatments are disclosed. In one implementation, the liquid jet apparatus may include a handpiece configured to deliver a high velocity liquid jet to a desired location in the mouth of a patient. The handpiece may include a positioning member having a channel through or along which the jet can propagate. The positioning member may have a distal end portion configured to be at least partially disposed in a pulp cavity, canal space, or opening in the tooth under treatment. During operation, the jet may impact an impingement surface of the distal end portion of the positioning member and be deflected as a spray through one or more openings in the distal end portion. The liquid jet apparatus may be used for root canal treatments.

Apparatus and methods for root canal treatments are provided. In some embodiments, an aiming element may be used to position a high-velocity liquid jet near a desired location in the tooth. Embodiments of the aiming element may include an interrupter that deflects or impedes the liquid jet when it is not desirable for the jet to propagate from the aiming element. Embodiments of the aiming element may include an elongated member that permits passage of the liquid jet through a channel. The elongated member may include one or more openings, for example, on sides and / or ends of the member. Some root canal cleaning techniques include one or more applications of the liquid jet followed by application of a disinfectant such as, for example, an aqueous solution of sodium hypochlorite.

Improved endodontic instruments having multiple tapers and instruments which prevent self-feeding or threading into a root canal during root canal therapy on a tooth are provided as well as a process for producing such instruments. The process basically comprises providing a grinding wheel rotated about a first axis having a plurality of flute grinding ribs and an extra flute grinding rib extending from a periphery thereof. A rotating wire stock is fed past the plurality of flute grinding ribs and the extra flute grinding rib at a feed rate and rotation rate such that a separate spiral flute is ground on the wire stock by each of the plurality of flute grinding ribs and the extra grinding rib. The feed rate and rotation rate of the wire stock is changed during the grinding of the instrument whereby the extra grinding rib follows the spiral path of the first flute grinding rib to thereby reduce the number of spiral flutes being ground on the instrument.

The present invention relates to a root canal treatment tool that is formed in a shape of a rod and has a work portion formed in a predetermined length from a tip and a shank formed in a manner continuous with the work portion. The work portion has a shape memory characteristic in a range of a predetermined length from the tip and a superelastic characteristic in a remaining portion.

Systems and methods for using a liquid jet apparatus for dental treatments are disclosed. In one implementation, the liquid jet apparatus may include a handpiece configured to deliver a high velocity liquid jet to a desired location in the mouth of a patient. The handpiece may include a positioning member having a channel through or along which the jet can propagate. The positioning member may have a distal end portion configured to be at least partially disposed in a pulp cavity, canal space, or opening in the tooth under treatment. During operation, the jet may impact an impingement surface of the distal end portion of the positioning member and be deflected as a spray through one or more openings in the distal end portion. The liquid jet apparatus may be used for root canal treatments.

The present invention provides novel methods and kits for removing unhealthy or necrotic pulp tissue from inside the root canals of a tooth, and to replace it with new vascularized tissue created by regenerative endodontic treatment. The present invention provides alternatives to current root canal therapies, as well as obturation of the root canal with dental materials.

An easily removable dental curable composition which prevents the fall or leakage of a temporary prosthetic appliance or a root canal filling material which is easily removed by bonding and adhering it to tooth, shows such high flowability that its operation is easy, has a long working time and excellent X-ray contrast properties and sealability and can be easily removed as required, and a filling kit.The dental curable compositon comprises (A) a polymerizable monomer mixture containing a polymerizable monomer having an acid group in the molecule and (B) a polymerization initiator, whereinthe component (A) contains (A′) a long-chain polymerizable monomer having a structure with a chain length of 17 or more atoms and / or the composition further comprises (D1) a soft resin material; andwhen the amount of the component (A′) based on 100 parts by weight of the component (A) is represented by [a′] and the amounts of the components (A), (B) and (D1) based on 100 parts by weight of the total of the components (A) and (B) are represented by (a), (b) and (d1), respectively, the following expressions (1) to (5) are satisfied:70≦(a)≦99.99  (1)0.01≦(b)≦30  (2)1≦[a′] / 5+(d1) / 1  (3)[a′]≦95  (4)(d1)≦250  (5).

An endodontic instrument for root canal treatment is provided having a working portion manipulated by a handle and a connection assembly for attachment with an electronic apex locator. The connection assembly allows the electronic apex locator to be connected to the instrument at or through the coronal end of the handle. Preferably, the connection assembly includes a male / female assembly located within or on the surface the file handle.

A three-dimensional computer model of the patient's tooth, including the pulp chamber and root canals, is created by combining at least one grey value image of the tooth and / or surface information about at least part of the intra-orally visible part of the tooth with a statistical, parameterized shape model of each tooth type (upper or lower incisors, canines, pre-molars, molars) as the patient's tooth to be treated. This allows for planning and / or simulation of one or more root canal treatments on the computer model of the patient's tooth and that the dentist or dental specialist is given qualitative and / or quantitative information by the system in order to aid in adequately analyzing the risks related to performing the root canal treatment with the proposed or user-selected endodontic tools.

The invention provides a premixed calcium silicate based root canal filling material with suspension stability as well as a preparation method and an application thereof. At least one calcium silicate compound is used as a main phase, and at least a second phase for improving solidification performance, at least one nonaqueous phase solvent which can be mixed with water, at least one suspension stabilizing agent and at least one radiopaque material are added in order to prepare the root canal filling material with excellent injectable performance. An inorganic dispersant with suspension stabilizing effect is added into the premixed type calcium silicate based root canal filling material system, based on reservation of excellent biological compatibility, biological activity, marginal sealability, and the like of the calcium silicate material, layering, deposition or flocculation of the premixed system are effectively prevented, long-term dispersion stability of the premixed paste is improved, and the material can be used as a filling material for dental pulp capping, root canal therapy, and other dental restoration fields.

Disclosed is a dental root canal treatment instrument having a simplified manufacturing process involving manufacturing the work portion and the joint portion by means of the same processing method. A metal rod-form body (11) has a work portion (11a) forming a fine taper which is inserted into the root canal when used and a joint portion (11b) connected to the thick-diameter end of the work portion and embedded in a handle (12), wherein the work portion and the joint portion are formed by the same processing method. The dental root canal treatment instrument (10) is completed by forming the handle (12) by injecting a synthetic resin to cover the joint portion (11b). The bond between the joint portion and the handle can be reinforced by adding at least one protrusion or recess to the joint.

A root canal filling material incorporates heat conductive particles of sub-micron size dispersed in a heat flowable matrix of endodontic filling material. The particle size is 1 micron or less (e.g., 0.5 to 1 micron, or nanoparticles of 100 nm or less). The addition of high heat conductive particles in the heat flowable matrix material improves the overall heat conductivity of the root canal filling material. During root canal treatment procedure, the filling material softens more thoroughly to fill the root canal apex and to form a seal of higher integrity at the root canal apex area, at a significantly lower operating temperature. The inventive filling material may be provided in bulk (e.g., pellet form) for use with an injection tool that heats and injects softened filling material into root canal cavities, or pre-shaped in the form of dental root canal filling cones (or points).

The invention provides a pre-mixed calcium silicate / magnesium phosphate double-phase composite self-solidification root canal filling material and a preparation method and application thereof. Magnesium phosphate bone cement powder and at least one calcium silicate compound serve as the main phase, and at least one nonaqueous phase solvent capable of being mixed and dissolved with water and at least one injection-resistance material are added to prepare the root canal filling material with the excellent injectable performance. According to the pre-mixed calcium silicate / magnesium phosphate double-phase composite self-solidification root canal filling material and the preparation method and application thereof, the advantages of magnesium phosphate and calcium silicate materials are combined, so that the solidification time is short, the biological activity is good, and the marginal seal and anti-microbial characteristics are good; and meanwhile clinical application is convenient, and the root canal filling material can serve as the filling material for the field of dental department restoration such as pulp-capping and root canal therapy.

The invention intends to provide a dental diagnostic device capable of detecting whether or not an electric leakage path which departs from a root canal, bypassing an apex is contained in a conductive path. The dental diagnostic device includes a measuring electrode, an oral electrode, a measurement signal applying means, a measuring means and a detecting means. The measuring electrode is inserted into a root canal of a tooth which is a diagnosing object. The oral electrode is brought into electric contact with oral mucosa. The measurement signal applying means applies a measurement signal in between the measuring electrode and the oral electrode. The measuring means obtains data corresponding to the electric characteristic of at least part of a conductive path between the measuring electrode and the oral electrode based on measurement of electric response to the measurement signal. The detecting means detects to see whether or not an electric leakage path bypassing an apex of a tooth is contained in a conductive path by applying a predetermined determination standard to data.

The invention discloses a navigation device for root canal treatment. The navigation device is composed of plywood, a guide post and a working length marking plate, the plywood is a sleeve plate which is matched with the dental crown shape of an offending tooth or the offending tooth and a partial tooth or a whole tooth of an adjacent single tooth, and an exposure opening is formed in the portion corresponding to an offending tooth root canal; the cross section of the guide post is shaped like an inverted L, the guide post is connected with the plywood into a whole through the end of a vertical section, a notch is formed in the end of a horizontal section, the edge in the notch corresponds to an offending tooth root canal approach, and the distance between the lower surface of the horizontal section and the upper surface of the plywood is at least 1.5 mm; the working length marking plate is a disc with a hole formed in the middle and is movably fixed on a fissure drill or expansion or file, and matching and limiting of the working length marking plate and the upper surface of the notch of the guide post are achieved through the lower surface of working length marking plate. The invention further discloses a making method of the navigation device for root canal treatment. The navigation device has better compactness with a tooth body, accurate positioning can be achieved without relying on a doctor, tooth body tissue cutting is reduced, the probability of a tooth fracture of a patient is reduced, and it is guaranteed that root canal treatment is conducted smoothly.

The invention relates to a plasma needle device belonging to the field of plasma generation devices and solving the problems that the traditional corona discharging device can not be directly touched by human bodies, and the electrode of a plasma jet device is unsafe or arc discharge is probably generated between the electrode and the ground. The plasma needle device comprises a pulse power source and an electrode, wherein the electrode is connected with the pulse power source through serially connected resistors and capacitors; the radial section of the electrode is in the shape of one of a circle and a ring or a polygon; and the end part and the outer surface or the inner surface of the electrode are provided with needle-shaped or splinter-shaped bulges. The invention has the advantages of easy manufacture and maintenance, convenient use, low cost and easy carrying; the generated temperature of plasma needles can be different by adopting the resistors with different resistance values, the capacitors with different capacitance values and different driving power sources and working gases; and the plasma needles can be applied to sculpture, deposition, surface treatment, surface cleaning, purification, food treatment, biomedical disinfection, tooth cleaning, root canal therapy, and the like.

The present invention relates to oral root canal treating material, and is especially a kind of root canal filling material of nanometer zinc oxide and clove oil and its preparation process. The root canal filling material consists of powder in 60-75 wt% and clove oil in 25-40 wt%, and the powder consists of inorganic nanometer ZnO of 10-280 nm size 46-90 wt%, inorganic nanometer ZrO2 of 10- 600 nm size 5-40 wt%, inorganic nanometer hydro xyapatite of 80-100 nm size not more than 10 wt%, inorganic nanometer silver carrying antibiotic powder of 90-150 nm size not more than 10 wt%, thymol 2-10 wt%, anaerobe resisting medicine not more than 10 wt%, antibiotic not more than 25 wt%, and steroid glucocorticoid <1 wt%. Compared with available technology, the present invention has the advantages of high X-ray resistance, high flowability, high biocompatibility, low dissolubility and low cost.

A method and device for programming a cordless handpiece used for root canal treatment and having a first memory and a tool holder for a treatment tool are described. The method includes providing a first data volume having a plurality of data sets in a second memory separate from the first memory, each of the data sets comprising at least one parameter assigned to the cordless handpiece and / or to the operable tool, selecting at least some of the data sets from the first data volume in the second memory, transmitting the selected data sets from the second memory to the first memory of the handpiece, and selecting a data set from the updated first memory for operation of the handpiece.

An endodontic instrument set of progressively smaller sizes adapted for use in performing root canal therapy and a method of using the instrument set are provided. Each of the instruments have an elongated shaft comprising a proximal end and a distal end and a short enlarged continuously tapered working length formed on the shaft adjacent to the distal end. The short enlarged continuously tapered working length has at least one continuous cutting edge thereon.

The invention discloses a lubricant for root canal therapy, which comprises ethylenediamine tetraacetic acid sodium salt, phytic acid, dodecyldimethylbenzyl ammonium chloride, Tween, cellulose, glycerol, germicide and water. Because the phytic acid has strong metal ion complexing capability and pH value adaptive ability, the product is easy for reaming and filing operation in the process of the root canal therapy; because the phytic acid has effects of corrosion prevention and bacterium inhibition, the stability and quality guarantee period of the product are improved; by adopting non-peroxide germicide and a pasting agent complexed by the Tween, the dodecyldimethylbenzyl ammonium chloride, the cellulose and glycerol, the surface tension and the fluidity of the product are adjusted by adjusting the proportions of all components in the pasting agent while improving the stability of the product, and the product not only can be used for syringe injection but also can be used for needle stick guide operation; and the invention can effectively remove a staining layer, the germicide added into the lubricant can kill pathogenic bacteria in the root canal reaming and filing process, therefore, the success rate of the root canal therapy is effectively improved.

The present invention provides a root canal length measuring apparatus and a root canal treatment apparatus which can acquire a position of a measurement electrode with high reproducibility in the same root canal. The root canal length measuring apparatus includes a measurement electrode which is inserted into a root canal, an oral electrode which is held in an oral cavity, a measuring section which applies an electric measuring signal between the measurement electrode and the oral electrode and specifies an apex position so as to measure a root canal length, a memory means which stores position data corresponding to a position of the measurement electrode in a root canal acquired by the measuring section, and an operating means which instructs the memory means to store the position data.

The invention discloses a therapeutic apparatus for the dental department. The therapeutic apparatus comprises a host, a connecting pipe and a handle which are connected in sequence. An ozone generator and a mixer are installed in the host, the ozone generator and a liquid medium are connected to the input end of the mixer, and the output end of the mixer is connected to the connecting pipe. According to the therapeutic apparatus, a local administration space is formed through an injection needle and a negative pressure suction opening at the front end of the handle, washing and negative pressure suction are both achieved, operation is simple and easy to implement, and the therapeutic apparatus can be used for treating periodontitis, pericoronitis, gingivitis and mucosal diseases; the therapeutic apparatus is used for root canal therapy and negative pressure suction which are better than conventional natural drainage, and a better removing effect is achieved on inflammatory substances which are in root canals and side wall root canals and are difficult to suck out at the normal temperature.

The invention provides a calcium phosphate composite material for filling a root canal. The composite material consists of a solid-phase component and a liquid-phase component, wherein the solid-phase component is a mixture of calcium phosphate, magnesium oxide, soluble hydrophosphate and iodoform; and the liquid-phase component is an aqueous solution of sugar, hydrophosphate and citric acid. The invention also provides a method for preparing the composite material. In the composite material, the injection property and collapse resistance of the composite material can be improved by the gelation of the sugar in the liquid-phase component and the chelation of inorganic ions in the solid-phase component, the magnesium phosphate generated by a hydration reaction has relatively strong adhesive force, the bonding strength between the root filling material and the root canal wall can be promoted, and leakage is avoided; and the iodoform can be used for enhancing the X-ray opacity and diminish inflammation to improve the curative effect of root canal therapy.

The invention discloses a preparation method of root canal filling materials, which comprises the steps that: (1) the mixture composed of thermoplastic copolymerization-modified polymer or / and grafted modified polymer and inorganic filler treated with surface modification as well as compounds which have resisting function to X-ray is evenly blended by adopting a kneader; and (2) the mixture is mixed for 5 minutes to 40 minutes in melting state with the temperature of 140 DEG C to 250 DEG C, then the root canal filling materials of the invention are prepared; the root canal filling materials prepared by the method has the advantage of not only excellent stability of gutta-percha filling materials, but also excellent cohesiveness of Resilon resin filling materials; the defects of poor adhesive bonding performance of the gutta-percha filling materials and easy degradation of the Resilon resin filling materials which are used in current clinics can be overcome; and compared with the gutta-percha filling materials and the Resilon resin filling materials, the stability and the cohesiveness are greatly improved.

The invention discloses an intelligent temperature-sensitive sustained-release gel and a preparation method thereof. The intelligent temperature-sensitive sustained-release gel comprises the following components in percentage by weight: 15-25 percent basic remedy, in-situ gel material and water, 2-3 percent of poloxamer 188, 0.5-1 percent of polyethylene glycol-6000, 5-7 percent of ornidazole and 60-70 percent of distilled water. An intelligent temperature-sensitive sustained-release in-situ gel drug-loading system is prepared by combining medicaments with different types of high molecular carrier materials, and is applied to root canal treatment for the first time, so that the defects that the lasting time of the conventional root canal disinfecting and sterilizing effects is short, root canals cannot be fully filled with medicaments under the limitation of dosage form and the like are overcome, the root canal disinfecting operation is simplified, and the double effects of sustained-release long-acting treatment and root canal enclosing are achieved. The one-time success rate of root canal treatment is increased, and the intelligent temperature-sensitive sustained-release gel has an important practical value on the treatment of pulposis, pulpitis and periapical periodontitis and the like.

A dental X-ray reference device comprised of a radiopaque marker having a known dimension and a tooth overlay molding adapted to secure the radiopaque marker in close proximity to a tooth. Also disclosed is a process for measuring teeth for implant placement or root canal treatment. This process comprises the steps of providing a dental X-ray reference device comprised of a radiopaque marker having a known dimension and a tooth overlay molding adapted to secure the radiopaque marker in close proximity of a tooth, or alveolar ridge. The dental X-ray reference device is then positioned in a mouth of a patient. The radiopaque marker is positioned over the edentulous area or over a tooth. Then an X-ray sensor is positioned behind the tooth, or alveolar ridge, and behind the X-ray reference device. A radiograph of the tooth or alveolar ridge, and the radiopaque marker is taken.

The invention discloses a dental pulp opening method and device for root canal therapy and belongs to the technical field of oral treatment. The dental pulp opening method includes: intercepting an image of a middle position of a diseased tooth from a computed tomography slice containing a target tooth, and acquiring a three-dimensional model of the target tooth through segmenting calculation of an image slice; dividing out a root canal of the target tooth from a CT image from the target tooth, and separating out an upper-section root canal in preset length; extracting a central line of the divided root canal, and calculating a crossing point of the center and the three-dimensional model of the target tooth; taking the crossing point of the center and the three-dimensional model of the target tooth as a reference point to analyze and adjust position of a cutting-in point according to a specific image, and utilizing a navigation system to finally determine pulp opening position of the target tooth. By the dental pulp opening method and device, removing of a whole roof of a pulp chamber is not needed while position of the root canal can be found more accurately, and diameter of a pulp opening port is reduced remarkably while dentin of the side wall of the pulp chamber is preserved to greatest extent.