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.

In a wave gear device, similarity curve tooth profiles for defining the tooth-face tooth profile of each of a flexible externally toothed gear and a rigid internally toothed gear is determined from the movement trajectory, relative to a tooth of the rigid internally toothed gear, of a tooth of the flexible externally toothed gear at a main cross-section at which the deflection factor is κ=1. Tooth profile curves, which have been subjected to profile shifting corresponding to the difference between the deflection factor κo (>1) of the opening-end cross-section of the flexible externally toothed gear and the deflection factor κ of the main cross-section, are determined from the similarity curves; and the tooth profile curves are used to form the tooth-face tooth profile portions of the two gears. High-gear-tooth compound tooth profiles, defined from the tooth-face tooth profile portions, straight-line tooth profile portions continuing from the tooth-face tooth profile portions, and appropriate tooth-flank tooth profile portions for avoiding interference are used as tooth profiles of the internal teeth and the external teeth. Also, taking coning of the flexible externally toothed gear into account, negative profile shifting is applied from an opening-end cross-section to an inner-end cross-section of the flexible externally toothed gear, and rational meshing between the two gears is obtained along the entire tooth trace.

Provided is an improved drive mechanism for an imaging machine. A tapered surface is disposed outboard of the drive dog seat whereby a tooth of the imaging machine drive mechanism is centered and directed into the drive dog seat. The leading edge of the drive dog seat contacts the base of the imaging machine drive mechanism thus making full contact between the drive dog seat and the imaging machine drive mechanism tooth.

An inspection device for contactless three-dimensional inspection of a circular, mechanical component with toothing having a main axis of rotation. The device is configured to scan the teeth by at least one first pair of laser measurement modules and rotationally drive the component about the main axis relative to the laser measurement modules. The device then rebuilds a virtual three-dimensional representation of the component using data coming from said scanning and performs a dimensional inspection using the three-dimensional representation. Each pair of modules includes a first module oriented towards a first face of a tooth and a second module oriented towards a second face of a tooth. The modules are oriented relative to the component so that during a rotation of the component, the laser measurement modules scan the first and second faces of each tooth throughout their thickness and depth.

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.

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.

The invention provides a large diameter and large pitch screw surface induction heating device and a surface heating method. The device includes a base transmission device, a mobile sliding table device, a telescopic induction coil device, a thermometer, a CCD camera and a helical coil. The movement of the screw in two directions and matching the corresponding speed, let the diamond coil move along the tooth profile of the screw to be heated, scan the surface of the tooth profile of the screw to be heated, and then pass the helical coil with high-frequency current to heat the surface of the screw to be heated. The tooth top surface of the screw is heated so as to cover the entire surface of the screw to be heated. At the same time, the temperature is measured in real time during the heating process through the thermometer, and compared with the target temperature in real time, and the heating parameters and motor speed are adjusted in real time. Control the heating temperature difference so that the entire surface of the screw to be heated is completely and uniformly heated, forming a temperature gradient of the entire tooth profile, improving the heating quality, and laying a good foundation for the next step of quenching.

The invention relates to a method for producing at least one gear, in particular a helically toothed gear, wherein the gear is produced from a gear blank pressed and sintered with an oversize in the region of the set of teeth, wherein the gear blank has two opposite end faces and a circumference. In the method, the gear blank is clamped in a clamping means. The gear blank is compressed in the region of the oversize by means of the engagement of at least one circumferential tool having a set of mating teeth that engages with the set of teeth of the gear blank, wherein the gear blank is radially clamped over the circumference by the clamping means at both end faces during the compression of the gear blank, wherein each individual tooth of the set of teeth of the gear blank is supported by the clamping means substantially over the entire tooth height. In this way, the quality of the set of teeth can be improved. The invention further relates to a device and to a clamping means.

The invention discloses a dental calculus removing device for a pet dog. The dental calculus removing device comprises a V-shaped tooth socket, wherein tooth grooves are formed in the upper and lowersurfaces of the V-shaped tooth socket; V-shaped cavities are formed in opposite inner walls of the tooth grooves; a plurality of triangular air cushions are embedded into the opposite inner walls of the tooth grooves at equal intervals; the triangular air cushions are in elastic sealing connection with the inner walls of the tooth grooves; one side of each triangular air cushion is parallel to theinner wall of the corresponding tooth groove; the tip end of each triangular air cushion extends into the corresponding V-shaped cavity; a V-shaped liquid storage bag and a V-shaped air storage bag are arranged between the inner bottoms of the upper and lower tooth grooves; a layer of hairbrush is arranged on the outer side wall of each triangular air cushion; the outer wall of each triangular air cushion communicates with a plurality of liquid outlet pipes and liquid suction pipes; check valves are mounted in the liquid outlet pipes and the liquid suction pipes; and the tail ends of the liquid suction pipes communicate with the V-shaped liquid storage bag. The dental calculus removing device for the pet dog is reasonable in structure and can be directly arranged on teeth in a sleeving manner to wrap the whole teeth, so that an all-directional and rapid cleaning process is realized.

A device for gear manufacturing disclosed by the present invention includes a frame, and a drilling cavity with an opening to the left is arranged inside the frame, and a hydraulic telescopic rod is fixed at the lower end of the drilling cavity, and the hydraulic telescopic rod The upper end is fixed with a support column, and the support column is provided with an anti-touch cavity with an upward opening. The anti-touch cavity, the present invention can directly process a complete disc, and then complete the machining of the shaft hole and tooth profile of the entire tooth profile through mechanical transmission, and the clamping device provided can effectively fix the gear disc, It reduces the time for people to process and place the inner hole when processing the tooth shape, and improves the processing efficiency.

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 belongs to the field of daily necessities, and specifically discloses a liquid toothpaste and a preparation method thereof. The liquid toothpaste is composed of xylitol, vitamin C, cetylpyridinium chloride, sodium fluoride, natural betaine, sodium phytate, traditional Chinese medicine extract, sodium lauryl sulfate, sodium lauroyl sarcosinate, glycerin, sorbitol , silicon dioxide, essence, cooling agent, preservative, sweetener, edible gum and water. The toothpaste exists in a liquid form, so that the active ingredients in the product can smoothly reach the various surfaces of the oral cavity and quickly penetrate into the crevices of the teeth, covering the entire teeth. It can effectively sterilize, inhibit bacterial growth, remove dental plaque, prevent caries, and can effectively improve gum and periodontal problems such as bleeding gums, gum pain, gum swelling, and bad breath, protect the oral cavity, and make teeth white and healthy.

The invention provides a method for reconstructing a three-dimensional model of an entire tooth through the CT data of a plaster model of jaw and the panoramic drawing of the jaw. The method adopts the following steps: a cone beam CT (CBCT) specially used for the oral cavity is used for scanning the plaster model of the jaw to obtain the CT data of the plaster model of the jaw; three-dimensional reconstruction is performed to the CT data of the plaster model of the jaw to obtain the three-dimensional geometric model of the jaw; the three-dimensional geometric model of the jaw is extracted; the information on the side contour of the tooth is extracted and the three-dimensional geometric model of the radix dentis is generated in combination with the model of the corona dentis; and the three-dimensional model of the entire tooth is formed by combining the three-dimensional geometric models of the corona dentis and the radix dentis. The invention has the advantages that the three-dimensional geometric digit model of the entire tooth can be generated on the basis of the two-dimensional information of the side contour of the tooth on the panoramic drawing and according to the three-dimensional geometric information of the corona dentis part in the CT data. The method can be applied to every tooth in the panoramic drawing to generate the jaw model with accurate dentition, and can be applied to orthodontics and computer simulated tooth arrangement.