118 results about "Human tooth" patented technology

A scanning system includes a hand-held scanning device that generates two-dimensional images of a pattern reflected off an object. The system also includes a memory and processing unit. The memory stores a calibration table for the scanner and received scanned bitmap images. The processing unit generates three-dimensional information as to a scanned object. The scanning can be performed without knowledge or even precise control of the position of the object relative to the scanner. Random movement of the object during scanning is also possible. For example, the scanner is simply swept over the surface of the object by hand. Three-dimensional information of the object is obtained from the captured images using a calibration table for the scanner. A method of calibration of the scanner in X, Y and Z directions is also described. The scanner can be used for a variety of purposes, including medical and industrial purposes. The illustrated embodiment is in-vivo scanning of human teeth for purposes of orthodontic treatment planning and diagnosis.

The present invention discloses an abutment of a dental implant consisting of an abutment screw and a shoulder surface. The upper structure of a crown or bridge abutment, i.e., the abutment screw is made of titanium alloy, and surface-treated in brown color by an anodizing process, and the connecting structure thereof, i.e., the shoulder surface is made of ceramic material containing zirconia of a white color, thereby providing an adequate mechanical strength, while maintaining the natural color of human teeth and light permeability. Further, the present invention discloses a method of aesthetically surface-treating the abutment screw of a dental implant abutment by using the anodizing process, and a method of fabricating the shoulder surface of a dental implant abutment.

The invention relates to oral and dental care agents, containing: an active ingredient combination (A) of at least one cationic component with an anti-bacterial action, (B) at least one active ingredient with an anti-tartar action, selected from the group of azacycloalkane diphosphonic acids or their phnysiologically compatible salts and (C) at least one binding agent, selected from xanthan gum, carboxymethylcellulose or a mixture of said two components. The oral and dental care anti-bacterial agents do not cause the discoloration associated with chlorohexidine and reduce or prevent discoloration to human teeth. This is unique for oral and dental care agents based on chlorohexidine. The inventive oral and dental care agents also have a tartar prevention and plaque reducing agent.

Improved systems and methods for producing dental restorations and ceramic materials for such restorations are disclosed. Optical properties, preferably including color and translucence characteristics, of a tooth or teeth of a patient are measured with a shade measuring instrument. The tooth to be restored is prepared, and a physical or virtual dental impression is created. A prescription for the restoration, which typically includes color, translucence and thickness information, is sent to the restoration fabrication facility either electronically or physically. A recipe and / or a mixture of ceramics are generated for the restoration, with multiple layers being specified, based on the measured optical properties. The recipe algorithm may adapt, or process checks may be performed, based on measurements of fabricated layers. Preferably, dental ceramics are specified to bracket the region of color space relevant to human teeth, and a reduced set of ceramic materials are manufactured and distributed. Based on measured optical characteristics of the ceramic materials, recipes and / or material mixtures are specified or prepared for the restoration. A virtual impression data file may be transmitted to the laboratory instead of a physical impression.

A bite-block device for preventing biting of air tubes, such as laryngeal mask airway (LMA) tubes by human teeth is disclosed. The device is composed of a generally cylindrical body, fabricated from a biologically compatible polymer. A hole is present through the long axis of the body. The device also extends in a plane perpendicular to the long axis of the body. Attached to this plane is a coupling device intended for securing an LMA tube to the bite-block. The bite-block is positioned within a patient's mouth against the cheek, with the plane perpendicular to the long axis pressed against the lip. Deployed in this fashion, the bite block engages the molars, bicuspids, and cuspids, preventing contact of the teeth with an LMA tube.

A method for creating shaded zirconium-oxide ceramics and a composition created by that method. Shaded yttrium tetragonal zirconium-oxide polycrystals are mixed to achieve a spectrum of final shaded ceramics matching the shades of human teeth. Ceramic material can be in raw form or can be milled and sintered as final product. A method for creating dental prosthetics and the dental prosthetics created by that method.

A dental hygiene apparatus including a mouthpiece formed of a flexible arcuate channel defining and inner space designed for receiving an upper or lower set of human teeth. The channel is provided with longitudinally extending tunnels interconnected by communicating passageways. Each of the tunnels is provided with a longitudinally extending track and a guide slot communicating with the inner space. A carriage assembly includes motor assemblies joined by rigid chassis rods. The carriage assembly is designed such that the motor assemblies may be disposed in the tunnels while the chassis rods are disposed in the passageways. The motor assemblies have a shaft extending through one of the guide slots and carrying a rotatably mounted cleaning head on a distal end. The motor assemblies also include a driven wheel resting on a one of the tracks, for propelling the carriage assembly along the tracks. The cleaning heads rotate to clean the teeth and travel along the tracks to clean each tooth in sequence.

Tooth brace visual indicia for a brace system for human teeth, including an indicia apparatus for engagement with at least one component of a brace system for human teeth. The indicia apparatus includes an attaching carrier removably attachable to the at least one component of the brace system, and the attaching carrier is in operational engagement with or integrally formed with visual indicia. A visual indicia system and a method of providing visual indicia are also disclosed.

Compositions and methods for whitening human teeth containing peroxide and a hydroperoxidase inhibitor. The compositions exhibit superior teeth whitening effects while also retaining a greater amount of peroxide compared to compositions not containing the hydroperoxidase inhibitors. The compositions may be formulated in a hydrocarbon humectant free vehicle comprising a peroxide compound, a hydroperoxidase inhibitor, a chelating agent, an anti-oxidizing agent, and a thickening agent. The compositions may further include compounds to reduce oxidative stress. Also disclosed is a delivery system including a flexible film, an oral care composition that contacts the teeth, an adhesive material that generally contacts the soft tissues, and a physical barrier that prevents contact between the oral care composition and the adhesive material.

Systems, processes, techniques, and apparatus are described for thermolytic eradication of bacteria and biofilm in the root canal of a human tooth involve an elongated and flexible optical probe and a laser oscillator that provides the probe with near infrared energy. The optical probe can be sufficiently long for insertion into substantially the entire length of the root canal of the tooth. The optical probe causes lateral dispersion of the radiation from the probe throughout the root canal. The radiation is provided at an energy density and for a period of time that are necessary to selectively target bacteria and live biofilm in the dentinal tubules of an entire root canal system, at once, thereby (1) inhibiting creation of a blackbody “hot tip”, and (2) inducing laser interstitial thermotherapy (LITT) within the root-canal space. Near infrared wavelengths from about 700 nm through about 1100 nm can be used.

A device for use in retracting a gingiva from a human tooth by widening a gingival sulcus with a dental composition. The device comprises a cannula with a free end having an opening for dispensing the dental composition. The free end is shaped to be inserted with its front in the entry of the gingival sulcus, and to laterally displace the gingiva from the tooth as the cannula is moved in the gingival sulcus. The invention may help to achieve a reliable and cost effective gingival retraction treatment.

A method for constructing banks of human dental pulp stem cells comprises the steps of acquiring basic information, obtaining dental pulp stem cells, cryopreserving and putting dental pulp stem cells into cell banks and recording and checking information. When the banks of dental pulp stem cells are used, recovery and multiplication culture are carried out in accordance with the actual demands. In the method, the dental pulp stem cells are obtained from dental pulp of waste healthy human teeth and a reserve bank for effective resources is established by using system engineering. A great quantity of dental pulp stem cells with functional activities can be obtained through short-term culture of the human dental pulp stem cells stored in the banks and can be stored for long term without losing the activities. Compared with the prior art, the invention is characterized in that the construction operation specification is simple, easy to grasp, safe and feasible; the bank construction cost is low and the standardization degree is high; and the cells from different age groups adopt different cryopreservation solution so that the activities of the recovered cells are enhanced, thus expanding the sources of the cells and enhancing the activities of the cells. The teeth used in the method are those which are extracted for various reasons and are waste, thus greatly saving the medical resources; therefore, the construction has wide application prospect.

A natural anhydrous oral care composition with a limited number of naturally-derived, naturally processed, generally regarded as safe (GRAS) ingredients including an effective amount of a bioactive glass is described. The topical application of the composition to human teeth cleanses, remineralizes and reduces plaque build-up on teeth.

A medical implant comprising in combination a synthetic, biological, or autologous matrix (or scaffold) and pluripotent stem cells derived from human teeth. Stem cells are harvested from the dental pulp of extracted wisdom teeth. After the stem cells are removed, the hard tooth is ground into a base material for the manufacture of a porous matrix bone into which the stem cells can be added. Additionally, soft tissue from the harvested tooth may be used as a carrier scaffold for soft tissue applications such as meniscal or cartilage repair.

The invention relates to a nanometer zirconium oxide composite ceramic material, a tooth color-imitating nanometer zirconium oxide composite ceramic tooth and a preparation method thereof and belongs to the technical field of zirconium oxide composite ceramic teeth. The nanometer zirconium oxide composite ceramic material comprises the following raw materials in parts by mass: 90-100 parts of nanometer zirconium oxide and 10-80 parts of organically synthesized colloid, wherein the organically synthesized colloid comprises the following raw materials in parts by mass: 10-50 parts of paraffin, 10-30 parts of polyethylene, 10-30 parts of polypropylene, 1-5 parts of stearic acid and 1-5 parts of oleic acid. The nanometer zirconium oxide composite ceramic material provided by the invention has a good mechanical property, excellent air permeability, strong chemical stability and excellent biocompatibility. The bending strength of the prepared ceramic tooth can reach 1200MPa, and the breaking tenacity can reach 9MN / m<3 / 2>. The tooth is extremely high in biofidelity and the color difference of the tooth with a human tooth is in a range of + / -1 chromatic degree.

The invention discloses jewelry made of pulverized and recombined primary human teeth, or baby teeth. The human deciduous dentin are partially pulverized and bonded with a chemical bonding agent in a frame configured to receive the pulverized dentin mold or pre-formed frame to create designs personalized to the family members.

Thoroughly cleaning teeth daily is indispensable for keeping human teeth healthy. However, plaque is generally not sufficiently removed because it is difficult to see. Conventional plaque-dyeing agents allow plaque to be seen easily but are complicated to apply and leave traces of dyes. A toothpaste includes an integrated plaque indicator and allows plaque to be temporarily dyed. A storage container has two separate chambers, one containing toothpaste mixed with dyeing agent and the other containing toothpaste mixed with decolorizing agent. The two pastes blend when the quantity required for cleaning teeth is dispensed. Even though decolorizing begins right away, it is slow enough to obtain an intensive initial dyeing effect. The dyeing substance spreads inside the mouth during brushing and allows plaque to be easily seen and removed by the user. A decolorization rate is calculated for removing plaque within an adequate period, with all visible dye disappearing after several minutes. A self-decolorizing dyeing solution and self-decolorizing dyeing tablets for professional use are also disclosed.

The invention relates to an electron paramagnetic resonance cavity capable of measuring human teeth in vivo. The resonance cavity is in a cylindrical shape, a rectangular detection port is arranged on the lateral face of a cavity body and penetrates along the lateral face of the cylinder in a chordwise mode, and the long side of the rectangular detection port is perpendicular to the direction where microwave magnetic-field components in the resonance cavity are located and is parallel to the direction of a current line located on the cavity wall. A pair of modulating coils is arranged on two sides of the detection point to enable the magnetic field modulation to work in the detection port. An allocation bolt outside a coupling hole is utilized to achieve coupling regulation between the cavity body and a microwave system. The whole structures of the resonance cavity and a coupling unit are made of brass. The electron paramagnetic resonance cavity is mainly used for in-vivo electron paramagnetic resonance (EPR) measurement of human teeth, achieves quick estimation of radiation dosage, and can implement paramagnetic resonance detection on samples which cannot be placed in the resonance cavity conveniently due to large volume or of which integral structures are not suitable for being damaged outside the cavity.

The invention relates to the fields of oral medicine and biomedicine, particularly a preparation method and application of a tissue-engineering human tooth root implantation material. The preparation method of the tissue-engineering human tooth root implantation material comprises the following steps: (1) separating, culturing and identifying human root tip dental papilla stem cells; (2) constructing an NFIC lentivirus vector; (3) preparing NFIC lentivirus vector transfected root tip dental papilla stem cells, screening the overexpression NFIC cell line, and inducing the cell line in a mineralization mode; and (4) incubating the overexpression NFIC cell line subjected to mineralization induction and a hydroxyapatite / tricalcium phosphate stent material together. The preparation method is simple to operate; and the prepared tooth root implantation material has small immunoreaction, and can be applied to preparation of human tooth roots.

A system for immediately placing a non-occlusive and non-functional temporary dental implant prosthesis in the jawbone of a human patient with the prosthesis having a size and shape of a natural human tooth.

The invention relates to the field of ceramic materials, in particular to a high-strength zirconia sintered body and a preparation method and application of the high-strength zirconia sintered body. The preparation method comprises the following steps that (1) zirconium salt and yttrium salt are mixed and dissolved in water, the pH value is adjusted to 8 to 10, then hydrothermal synthesis is carried out, an obtained reaction solution is subjected to heat treatment after being washed and dried, the reaction solution subjected to heat treatment is then ground, and obtained powder particles are granulated to obtain zirconia powder; (2) the zirconia powder is mixed with water to obtain a mixture I, a dispersant and a binder are added to the mixture I to be uniformly mixed to obtain a mixture II, and the mixture II is granulated to obtain the powder for the high-strength zirconia sintered body; (3) isostatic pressing is carried out on the powder for the high-strength zirconia sintered body and the like to be prepared into a green body, and the green body is subjected to degreased biscuit firing for 1 to 4 h at the temperature of 900 to 1100 DEG C and then high-temperature sintering is conducted to obtain the powder for the high-strength zirconia sintered body. The high-strength zirconia sintered body prepared by the method disclosed by the invention has high strength, good light transmittance and excellent performances, and a denture prepared by using the sintered body is strong in texture, good in jade appearance and similar to a human tooth.

This invention relates to one tooth friction test machine through human tooth analogue operation to test human tooth materials and stuff property, which comprises one pair of tooth friction test unit frames set with one piece of protruding wheels for reverse beams, wherein the test unit comprises one pair of contact upper and down tooth chewing analogue structure fixed with one inclination block and one movable block on inclination and one mobile spring reset part; the upper tooth analogue structure comprises one piece of T shape cover cylinder on beam fixed with analogue long tooth and match block.

The invention discloses a dental prosthetic material and a preparation method thereof. The method comprises the following steps: (1) soaking tooth enamel, dentin or titanium sheets by using a phosphoric acid aqueous solution or a mixed aqueous solution of peroxide and phosphoric acid; and (2) adding an aqueous solution of phosphate ions and fluorine ions into an Agarose-Ca solution to obtain a mixed solution, and placing the tooth enamel, the dentin or the titanium sheets treated by the step (1) into the mixed solution and obtaining the material on the tooth enamel, the dentin or the titanium sheets after the reaction is finished, wherein the Agarose-Ca solution is the aqueous solution of the agarose and calcium nitrate. The structure of the dental prosthetic material prepared by the method is close to natural human tooth enamel, and has phosphorite hexagonal prism crystals and enamel crystal column microstructures. The dental prosthetic material disclosed by the invention is expected to replace the conventional dental prosthetic material to repair the enamel damage caused by dental caries or other dental diseases, and also can serve as a groove sealing material for preventing the dental caries.

An endodontic file (6) including a discontinuity (18) formed within the file shank (7). The discontinuity (18) creates a safe breakage point at which the file (6) will fail prior to a failure occurring at any other point along the length (11) of the file. The safe breakage point prevents the tip (21) of the file (6) from becoming irremovably embedded in a human tooth (12) after file failure. Substantially the entire length (11) of the file (6) remains connected to the tip (21) after file failure, thereby providing a considerable portion of the file which may be gripped and manipulated in order to accomplish file removal. Empirical data is presented to permit proper characterization of the region surrounding the discontinuity (18).