22 results about "Human tooth" patented technology

An oral liquid dental suspension is disclosed, including (a) a tooth whitening agent; (b) a solvent; and (c) at least one of (i) a resin or (ii) a urethane. The suspension is formulated to be applied to the surface of human teeth, where it rapidly dries—even in the presence of saliva—to form an adherent varnish. This varnish enables prolonged and effective contact between the whitening agent and tooth enamel for enhanced whitening efficacy. The composition may further include one or more optional additives, such as sweeteners, glazing agents, teeth desensitizers, remineralization agents, sequestering agents, complexing agents, or fluoridation agents. Also provided are kits containing the oral liquid dental suspension and one or more applicators, as well as methods of use involving topical application to teeth and subsequent drying to achieve a whitening effect.

The utility model discloses an intraoral X-ray photography IP image plate positioning device, which relates to the technical field of image plate positioning, and comprises a silica gel fixing clamp capable of being sleeved on teeth, the silica gel fixing clamp is connected with an IP image plate positioner through a flexible connecting rod, when the device is used, a fixing ring and an X-ray machine are assembled, so that the IP image plate is arranged on the inner side of the photographed teeth, and the positioning of the IP image plate is realized. The silica gel fixing clamp is sleeved on the non-shooting tooth on the opposite side of the shooting tooth, and the silica gel fixing clamp has clamping and wrapping effects on the tooth of a person, so that the tooth does not need to be carefully clenched when being shot, and the condition of deviation does not occur; through the arrangement of the silica gel fixing clamp and the IP image plate positioner, a proper shooting position can be quickly positioned, and especially when the same tooth is subjected to preoperative, intraoperative and postoperative contrast shooting, shooting at the same position and at the same angle is easier, so that a more accurate diagnosis result is obtained.

The application relates to the field of oral cavity auxiliary tools, in particular to an oral cavity implantation auxiliary guide plate. The oral cavity implantation auxiliary guide plate comprises a cushion plate, a limiting plate, a connecting plate, a guide shaft cylinder, a threaded rod, a sliding rod and a supporting plate. The cushion plate is arranged on the inner side of a human tooth in an external environment, the limiting plate is arranged on one side of the cushion plate, the opposite side of the cushion plate and the limiting plate is provided with a connecting seat in the center, one side of the connecting plate is provided with a connecting rod connected to one end of the connecting rod, the other end of the connecting rod is connected to the connecting seat, the edge of the limiting plate is flush with the edge of the cushion plate, the other edge of the limiting plate extends outward and protrudes, a strip-shaped groove is arranged at the protruding edge of the limiting plate, the strip-shaped groove extends along the extending direction of the limiting plate, and the sliding rod is connected to the strip-shaped groove. The application is fixed in the oral cavity tooth, so that the oral cavity is expanded through a single supporting mode.

A mandibular advancement device for stabilizing and exercising muscles that support the human jaw and for improving chewing and biting function. The mandibular advancement device includes a base portion and two curved members extending outwardly from the base portion to form a generally arched-type shape. The device also includes two axles wherein each axle extends inwardly from a portion of each of the curved members. The device also includes two rollers, wherein each of the rollers is slidably disposed upon each of the axles for engagement by human teeth to achieve mandibular advancement.

The application discloses a tooth-shaped bionic indexable blade and belongs to the technical field of cutting tools. The bionic indexable blade comprises a tool rake face, a tool relief face and a cutting edge at the joint position of the tool rake face and the tool relief face. The curve characteristics of the cutting edge are taken from the cross-section curve of the tooth for biting and breaking food of human teeth. The tool rake face is provided with a chip breaker groove near the cutting edge. The curve characteristics of the chip breaker groove are taken from the cross-section curve of the tooth for grinding food of human teeth, which is used for chip breaking and chip removal. A boss is arranged behind the chip breaker groove of the tool rake face, which is convenient for clamping and assisting chip breaking and can increase the strength of the clamping position of the tool. A through hole is arranged at the central position of the tool rake face and the boss, which is used for fixing and clamping the blade. The application takes the tooth of human teeth as a bionic object through the bionics principle. The cross-section curve of the tooth for biting and breaking hard objects is taken as the cutting edge of the tool. The cross-section curve of the tooth side for grinding is taken as the chip breaker groove of the tool. The application combines the bionics and the curve cutting edge technology in modern cutting technology, aims to reduce the cutting force and cutting heat in the cutting process, reduce the peak value of the impact load, reduce the machining vibration, enhance the chip breaking capacity of the tool, improve the surface quality of the workpiece, enhance the machining safety and better meet the machining needs.

The invention discloses a tooth brushing visualization method, apparatus and device, and a medium, which are applied to a wrist wearable device and an intelligent mirror, and the wrist wearable device is provided with an acceleration sensor and an ultrasonic sensor. According to the method, an ultrasonic sensor detects a distance value with human teeth according to a preset sampling period, and an acceleration sensor detects a wrist swing acceleration value in real time; calculating the swing frequency according to the distance value and the sampling period to judge the effectiveness of the tooth brushing action, and combining the acceleration value and a preset threshold value to recognize the swing direction and complete tooth region mapping when the tooth brushing action is effective; and triggering a preset tooth area animation instruction according to the mapping result, and performing visual presentation by the intelligent mirror. According to the invention, non-contact accurate monitoring is realized, discomfortableness and positioning defects of a traditional scheme are avoided, children's tooth brushing interest is stimulated through gamified animation, the problems of tooth brushing resistance and nonstandard tooth brushing of children are solved, and oral health is guaranteed.

The present invention relates to a method for analyzing DNA methylation levels, a method for calculating DNA methylation levels, and a method for estimating the chronological age of a human subject on the basis of the DNA methylation levels, as well as to the related kits or equipment. The methods disclosed herein make use of methylation-sensitive restriction enzymes (MSREs) in combination with quantitative PCR (qPCR) and are suitable for use with degraded DNA samples / fragments, including those derived from bone tissues. The invention is particularly useful for the reconstruction of the biological profile of human remains of unknown identity, including samples from forensic, anthropological or archaeological contexts.

Endodontic instruments are used to clean and enlarge the endodontic cavity space (ECS), also known as the root canal system, of a human tooth. This document describes novel endodontic instruments that are radially compressible, and methods for their use.

This invention belongs to the field of endodontics, specifically relating to a simulated dental jaw model for the entire process of endodontic treatment. It includes a maxillary model, a maxillary base, a maxillary joint, a mandibular model, a mandibular base, a mandibular joint, a connecting device, a cervical joint, and a tail fixation device. The mandibular model includes a mandibular shell, a movable micro-adjustment module, and an extracted tooth. The mandibular shell is filled with a water-absorbing gel-like material. The movable micro-adjustment module is detachable. This invention allows for the rapid fixation and replacement of extracted human teeth, and can also recreate the adjacent relationships, periodontal microenvironment, and moist conductive environment around the tooth root. It can highly simulate the physiological conditions of extracted teeth within the dentition and jawbone, and is suitable for various teaching and training programs in endodontic microsurgery, dental restoration, and microsurgical root canal treatment, greatly expanding its application scenarios.

Endodontic instruments are used to clean and enlarge the endodontic cavity space (ECS), also known as the root canal system, of a human tooth. This document describes novel endodontic instruments that are radially compressible, and methods for their use.

The invention relates to the field of oral cavity auxiliary tools, in particular to an oral cavity implantation auxiliary guide plate. An oral implantation auxiliary guide plate comprises a base plate, a limiting plate, a connecting plate, a guide shaft barrel, a threaded rod, a sliding rod and a supporting plate, the base plate is arranged on the inner side of teeth of an external human body, the limiting plate is arranged on one side of the base plate, a connecting seat is arranged at the center of the side, opposite to the limiting plate, of the base plate, and a connecting rod is arranged on one side of the connecting plate; one edge of the limiting plate is flush with the edge of the base plate, the edge of the other side of the limiting plate extends and protrudes outwards, a strip-shaped groove is formed in the protruding edge of the limiting plate, the strip-shaped groove extends in the extending direction of the limiting plate, and the interior of the strip-shaped groove is connected to a sliding rod; the oral cavity expanding device is fixed in oral cavity teeth, so that the oral cavity is expanded in a single supporting mode.

The utility model discloses a silica gel appliance with high structural strength, which relates to the technical field of medical instruments and comprises an arc-shaped silica gel appliance body, the top and the bottom of the silica gel appliance body are respectively provided with an upper occlusion area and a lower occlusion area, the upper occlusion area and the lower occlusion area are provided with a plurality of tooth-shaped grooves, and the upper occlusion area and the lower occlusion area are respectively provided with a plurality of tooth-shaped grooves. Tooth-shaped grooves are formed in the top and the bottom of the silica gel appliance body, the distribution positions of the tooth-shaped grooves are matched with the distribution of teeth of a human body, a through hole is formed in the middle of the outer side of the silica gel appliance body, the through hole penetrates through the silica gel appliance body, and the through hole serves as a breathing hole. By means of the design, the appliance can be attached to teeth more tightly and accurately, when a patient chews to generate external force, the tooth-shaped grooves can better disperse stress, local stress concentration is effectively reduced, and the overall structural strength of the appliance is greatly improved.

The invention relates to method for developing and growing tooth organoids comprising the steps of, dissociating tooth tissue comprising dental epithelial stem cells, seeding the dissociated cells in a scaffold mimicking an extracellular matrix; and growing and passaging the cells in a medium suitable for organoid growth, wherein the medium does not comprise epidermal growth factor (EGF), thereby obtaining and expanding organoids.

The present invention relates to the technical field of dentures, and provides a porous ceramic framework, a preparation method thereof, and a double-bionic resin-ceramic composite material. The porous ceramic framework provided by the present invention is a three-dimensional structure formed by an array of a plurality of unit cell structures; the unit cell structure is a cube provided with through holes, the through holes are chamfered three-cylinder structures, the three cylinders in the three-cylinder structure have the same size, and the length of the cylinder in the three cylinders is the same as the side length of the cube. By changing the parameter D, the present invention controls the porosity of the pore unit and constructs a porous ceramic framework with a gradually changing porosity from the bottom to the top, achieving the bionics of resin-infiltrated ceramic materials and human teeth to the greatest extent in terms of physical properties; the porosity, pore size, and pore distribution of the porous ceramic framework provided by the present invention have strong controllability and can achieve a three-dimensional through structure, achieving the bionics of resin-infiltrated ceramic materials and human teeth to the greatest extent in terms of structure.

Dental treatment device includes a wand having an applicator. A neck connector is provided between the wand and the applicator. An ultrasonic resonator; is provided and the ultrasonic resonator generates ultrasonic vibration in the applicator. The applicator generates ultrasonic vibration of a surface of an open cell foam. The open cell foam being impregnated with a solution and placed in contact with a surface of an individual human tooth.

The invention provides a decayed tooth detection method based on a splitting spectrum optical attenuation coefficient by utilizing optical characteristics related to a decayed tooth structure wavelength. According to the method, a complete OCT spectrum is divided into four spectrum sections, each spectrum section is subjected to OCT image reconstruction and OAC calculation, and healthy teeth and decayed teeth can be distinguished by comparing OAC differences among the spectrum sections. A reliable experimental result is obtained by testing in vitro human teeth. Results show that the method can realize detection of different types of decayed teeth in dentin and enamel, the effectiveness of the spectral OAC method in the aspect of decayed tooth detection is proved, and a non-contact and non-invasive new method is provided for decayed tooth detection.

The invention discloses an amorphous zirconium oxide dental restoration material and a preparation method thereof, and relates to the field of ceramic dental restoration, the amorphous zirconium oxide dental restoration material comprises an amorphous zirconium oxide matrix and in-situ crystallized zirconium oxide microcrystal particles, the content gt of the amorphous zirconia matrix; 50 vol% gt, 50 vol% gt; the content gt of zirconia microcrystal particles subjected to in-situ crystallization; and 10 vol%. According to the invention, the amorphous zirconia with low hardness and rigidity is used as a material matrix, and the content of zirconia crystallites crystallized in situ is accurately regulated and controlled, so that the mechanical and tribological properties of the material are close to those of human tooth enamel, and the purpose of reducing excessive wear of natural teeth is achieved.

The utility model discloses a training model for tooth extraction surface scratch operation, a training model for tooth extraction surface scratch operation, including the hinged seat of the rotation of certain angle, detachably install a pair of model base of simulating alveolar bone on the front end of hinged seat up and down symmetry, be equipped with tooth extraction nest in the position of corresponding human tooth on model base, be equipped with gum model of simulating gum on the outer package of model base, be equipped with the installation groove of corresponding communication tooth extraction nest bottom end on the outside surface of model base of corresponding human maxillary first molar, detachably install maxillary sinus bottom mucous membrane model spare in installation groove, and be equipped with granulation model spare in the bottom bonding of tooth extraction nest. The utility model is favorable to the direct view simulation demonstration periodontal damage situation, is favorable to the student and promptly discovers and corrects scratch operation, can improve the training effect of scratch operation.

The invention relates to the technical field of gastroscope medical treatment, and discloses a gastroscopy auxiliary device which comprises a gastroscope tube and a mouth expanding block arranged in the middle of the gastroscope tube in a surrounding mode, an expanding piece is arranged at the bottom of the gastroscope tube in a surrounding mode and used for expanding an oral cavity, and a connecting piece is arranged at the bottom of the mouth expanding block. The two bayonet pieces are arranged in the middle of the interior of the mouth expanding block, teeth are fixed through the bayonet pieces, the human teeth are prevented from moving autonomously, then the auxiliary device is prevented from shaking in the oral cavity of the human body, meanwhile, the bayonet pieces can guarantee that the teeth abut against the plane, the teeth are prevented from driving the mouth expanding block to rotate, and the tooth expanding effect is improved. The safety of gastroscopy is guaranteed, the gastroscope tube is prevented from being moved in the oral cavity, the oral cavity is expanded through the flaring piece, the gastroscope is prevented from abutting against the oral cavity at an inlet, the risk that the gastroscope moves to damage the oral cavity due to movement of the gastroscope is avoided, and meanwhile the connecting piece is connected with the expanding piece, so that the safety of gastroscopy is improved. And the possibility of excessive expansion of the oral cavity is avoided through flaring.

This invention relates to the field of forage harvesting technology and provides a grain crushing roller with a biomimetic human molar structure and a method for processing the biomimetic human molar. The grain crushing roller includes a first crushing roller and a second crushing roller, both of which include a crushing roller body and a molar mounting unit. The crushing roller body has dovetail grooves arranged along the circumferential direction of its outer surface, and the molar mounting unit is uniformly fixed to the dovetail grooves of the crushing roller body along the circumference. Square teeth are welded to the outer surface of the crushing roller body. The molar mounting unit includes a mounting base and biomimetic crushing molars. The biomimetic crushing molars are fixed on the mounting base, and several biomimetic crushing molars are uniformly arranged along the radial direction of the mounting base. This invention simulates the chewing mechanism of human molars, realizing a combined action of crushing, shearing, and grinding, which can improve the crushing rate, reduce energy consumption, reduce roller sticking, extend service life, and improve adaptability to corn with different moisture contents and maturity levels.

The utility model provides an auxiliary device suitable for gastroscopy and treatment, and relates to the field of medical instruments, the auxiliary device comprises a cylinder, two ends of the cylinder are open, two opposite side walls of the cylinder are provided with flat and straight surfaces, and the cylinder is provided with notches at the flat and straight surfaces; the spring strip is integrally connected with the edge of the opening in the cylinder body, the two ends of the spring strip and the two opposite side edges of the opening are arranged at intervals, and the spring strip is provided with at least one bending part; the bite plate is integrally formed on the spring strip; the baffle is fixedly connected to the biteplate, an included angle is formed between the baffle and the biteplate, and the distance between the baffle and the protruding part of the spring strip is larger than the width of a human tooth occlusion area; the fixing structure is arranged on the barrel and used for fixing the barrel on the face of the patient. By means of the arrangement of the spring strip, the biteplate and the baffle, the wearing and taking-down efficiency of the auxiliary device can be greatly improved, the oral mucosa, the teeth and the lower jaw of a patient can be protected to the maximum extent, and even time is won for rescuing some patients.

The application discloses an amorphous zirconia dental restoration material and a preparation method thereof, relates to the field of ceramic oral restoration, and discloses the amorphous zirconia dental restoration material, which comprises an amorphous zirconia base and in-situ crystallized zirconia microcrystal particles, wherein the content of the amorphous zirconia base is 90 vol%>50 vol%, and the content of the in-situ crystallized zirconia microcrystal particles is 50 vol%>10 vol%. The application utilizes the amorphous zirconia with low hardness and rigidity as a material base, and accurately controls the content of the in-situ crystallized zirconia microcrystal, so that the mechanical and tribological properties of the material are close to those of human tooth enamel, and the purpose of reducing the excessive abrasion of natural teeth is achieved.