37 results about "Entire tooth" patented technology

Apparatus and methods for endodontic treatment of teeth provide effective cleaning of organic material (such as pulp and diseased tissue) from the root canal system. In an embodiment, a compressor system generates high pressure liquid (e.g., water) that flows through an orifice to produce a high-velocity collimated jet of liquid. The high-velocity jet is directed toward a surface of a tooth, for example, an exposed dentinal surface, and impingement of the jet onto the surface generates an acoustic wave that propagates throughout the tooth. The acoustic wave effectively detaches organic material from dentinal surfaces and tubules. The detached organic material is flushed from the root canal system by the liquid jet and/or by additional irrigation.

The invention discloses a toothpaste suitable for a pump-type packing material and a preparation method thereof. According to a formula, the toothpaste is prepared from, by weight, 15-25parts offriction agent, 50-60 parts of moisturizer, 0. 5-1 part of thickening agent, 5-30 parts of deionized water, 0.01-3 parts of surfactant, 0.01-0.5 part of preservative, 0.01-2 parts of stabilizer, 0.01-1.5 parts of extract, 0.01-2 parts of taste modifier, 0.01-1part of appearance modifier and 0.01-10 parts of functional component. The toothpaste has good shear thinning specificity and thixotropy, can be easily discharged after pressing and pumping, is kept in a paste shape on a toothbrush and can be rapidly dispersed in the oral cavity, the effectively components in the product can smoothly reach the whole surface of the oral cavity and rapidly penetrate into gaps of teeth to cover the whole teeth, and the phenomenon that the toothpaste is dry or cannot be extruded out does not occur as time goes on.

The invention discloses a method and device for generating a dental panoramic image on the basis of a CBCT image. The method comprises steps of: determining a seed point in a current axial surface image of a CBCT apparatus, processing the seed point by using a curve fitting algorithm to generate a dental arch line; using a curve surface where the dental arch line is located as a central curve surface, computing body tissue density CT values corresponding to the pixels in the central curve surface according to a set sampling thickness, and generating initial dental panoramic images according to the body tissue density CT values; and determining the gradient factor of an anisotropic diffusion filter formula and processing the initial dental panoramic images with different scales by using the anisotropic diffusion filter formula to generate an final dental panoramic image. The method and device achieve a purpose of obtaining the two-dimensional panoramic image of the entire teeth by using the image processing algorithm on the basis of CBCT three-dimensional data.

[Problem] The purpose of the present invention is to provide an oral composition that enables a high level of whitening effectiveness to be obtained over the entire application area of the oral composition. [Solution] The present inventors discovered that a tooth whitening composition with a high level of whitening effectiveness over the entire tooth whitening composition application area can be obtained by including colloidal platinum as a platinum catalyst in a peroxide-containing oral composition. The present inventors also discovered that whitening effectiveness can be enhanced by application of a tooth whitening composition comprising colloidal platinum to the surface of the teeth followed by photo-irradiation of the application site.

The invention discloses a tooth punching die for a saw blade substrate. The tooth punching die comprises an upper die carrier and a lower die carrier, wherein a female die is fixed on the lower die carrier through a female die fixing plate; a male die is fixed on the upper die carrier through a male die fixing plate; a discharging device is fixed on the male die fixing plate; the male die and the female die are provided with a rough punching tooth and a fine punching tooth; and the size of the rough punching tooth is smaller than that of the fine punching tooth. In the tooth punching die for the saw blade substrate, a single tooth of the conventional die is replaced by double teeth, a tooth at the front operation end is the rough punching tooth while a tooth at the back operation end is the fine punching tooth, and the size of the rough punching tooth is slightly smaller than that of the fine punching tooth. When a double-tooth die is used for tooth punching, rough tooth punching and fine tooth punching are actually performed on the same tooth on the same die and rough punching is performed firstly. After a tooth index is selected by an indexing device, fine punching is performed on one roughly-punched tooth type and rough punching is performed on the other tooth type at the same time, so that tooth punching processing of the entire tooth type is finished, the completeness of the tooth type is ensured and the defects of tooth punching processing of the conventional die are overcome.

The invention discloses a method for reconstructing tooth root of a patient. The method comprises steps of scanning a standard tooth model and reconstructing a standard tooth digital model, wherein the standard tooth digital model comprises crown data and root data, and acquiring the root data of the standard tooth digital model; reconstructing a jaw digital model of the patient and acquiring the crown data from the jaw digital model of the patient; and promoting fusion between the root data of the standard tooth digital model and the crown data of the patient, wherein in the tooth model that fusion is completed, each tooth crown is aligned and integrated with matching tooth root on corresponding position so as to present the natural state of the entire teeth. The method disclosed by the invention has the advantages of being able to acquire the tooth root location information of the patient and improve the success rate of a correction scheme.

An interactive segmentation framework for 3-D teeth CT volumetric data enables a user to segment an entire dental region or individual teeth depending upon the types of user input. Graph cuts-based interactive segmentation utilizes a user's scribbles which are collected on several 2-D representative CT slices and are expanded on those slices. Then, a 3-D distance transform is applied to the entire CT volume based on the expanded scribbles. Bony tissue enhancement is added before feeding 3-D CT raw image data into the graph cuts pipeline. The segmented teeth area is able to be directly utilized to reconstruct a 3-D virtual teeth model.

A comb plate is provided that can be monitored whether entire teeth are damaged by continuously installing one detection line in order to detect damage of teeth of a comb plate fixed to the front of a landing plate of an escalator and that has a simple configuration for damage detection and that can minimize a cost for monitoring the teeth by using only one detection line while monitoring the entire of a plurality of comb teeth provided in the comb plate.

A four-wheel-drive vehicle includes a driving source, main driving wheels, auxiliary driving wheels, a power transmitting member, a first mesh clutch, and a second mesh clutch. Meshing teeth on the driving source side of the first mesh clutch each have, along an entire tooth width thereof, an inclined surface in which a length in a rotational axis direction increases in a direction in which the meshing teeth on the driving source side rotate when the four-wheel-drive vehicle is traveling forward. The meshing teeth on the power transmitting member side of the first mesh clutch each have, along an entire tooth width thereof, an inclined surface in which a length in a rotational axis direction decreases in a direction in which the meshing teeth on the driving source side rotate when the four-wheel-drive vehicle is traveling forward.

The invention discloses a shearing tool for the insulation paper of a rotor slot of a miniature motor. The shearing tool comprises a tool holder and a tool bit. The tool bit has a zigzag structure with three teeth which comprises a middle entire tooth with cutting edges and two half teeth on the two sides of the entire tooth, wherein the two half teeth are symmetrical about the middle entire tooth; the inner sides of the two half teeth are provided with a cutting edge respectively; and the width of the tooth root of the entire tooth is equal to the length of a sandwiched arc of an outer circle between two adjacent slots of a rotor. When the shearing tool for the insulation paper of the rotor slot of the miniature motor is used, the two half teeth of the tool are arranged between the insulation paper and the outer circle of a rotor core respectively, the middle entire tooth is arranged on the outer circle of the rotor core, the tool holder applies a thrust to the tool, and the tool bit moves forwards along the outer circle of the rotor core to cut off the insulation paper at the two ends of the rotor slot at the same time. Compared with the prior art, the shearing tool shortens process time for removing the insulation paper of the rotor slot of the miniature motor to be 1/3 of original process time, improves labor productivity and decreases the production cost of an enterprise.

The invention discloses a tooth-based gender deduction method, system and device and a storage medium, and the method comprises the steps: obtaining a CBCT image (Cone-beam CT, CBCT) of a target sample tooth; measuring three-dimensional information of the teeth according to the CBCT image; performing difference and correlation test on the three-dimensional information of the teeth and the real gender to obtain correlation parameters with gender difference and gender correlation; and establishing a sex determination model according to the correlation parameters. According to the invention, data measurement based on CBCT is adopted, so that more tooth three-dimensional information can be obtained. According to the method, the tooth volume is adopted as an identification object, the three-dimensional form information of the whole tooth is segmented, the influence of information such as adjacent teeth is reduced to a certain extent, and the identification accuracy is improved.