34 results about "Dental cusp" patented technology

A mouthguard for use by athletes, including a dual tray assembly molded together. The first tray is molded from a hard plastic such as an ethylene vinyl acetate copolymer, and has a portion that engage the cusps of the lower jaw molars to prevent the tray from moving backward on impact. A second tray is molded on to the first tray using a soft plastic or gel like material, such as a high percentage vinyl acetate copolymers of ethylene vinyl acetate, that softens at slightly elevated temperatures that a user can easily tolerate. The first time the mouthguard is used, it is heated in warm water, then the user puts it in his or her mouth and bites down to cause the second tray to conform to the upper teeth. When in use, the ridges on the first tray engage the teeth of the lower jaw to prevent movement of the lower jaw on impact.

The present invention discloses a self-contained dental prophylaxis angle with an offset rotational axis and methods for its use in cleaning, polishing, bleaching, bonding, etching, abrading, desensitizing, or otherwise treating teeth. Therapeutic content, such as dentifrice, is contained within the inventive prophylaxis angle, and is dispensed subject to operator control during use of the prophylaxis angle. An offset drive system is provided to power rotation of the dental tip in a system that can be physically separated from the storage and dispensing system for therapeutic content. A self-contained dental prophylaxis angle with an offset rotational axis according to the present invention may be used with a variety of shaped dental tips of varying degrees of rigidity, according the needs of a given clinical application.

The present invention provides a root canal length measuring device including: a measuring module configured to include a file hook electrically connected to an endodontic file, and a lip hook to be connected to a lip or a gum; a control module configured to measure the value of impedance which varies as the file moves from the surface of a tooth toward the apex of the root of the tooth, and provide an image signal or a sound signal representing information on the position of the apex of the root and information on the length of the apex of the root; and a communication module configured to receive the image signal or the sound signal from the control module, and wirelessly transmit the received signal to a smart device in real time.

A set of artificial teeth for a denture comprises a maxillary unit and a mandibular unit. When set up in lingualised occlusion, at least one of following occurs: the palatal cusp of the upper 4 (1) fits into the distal fossa of the lower 4 (6), the palatal cusp of the upper 5 (2) fits into the distal fossa of the lower 5 (7), the mesial palatal cusp of the upper 6 (3) fits into the central fossa of the lower 6 (8), the distal palatal cusp of the upper 6 (4) fits onto the marginal ridge of the lower 6 (9) and the mesial palatal cusp of the upper 7 (5) fits into the central fossa of the lower 7 (10). The buccal cusps of the lower teeth are out of contact with the upper teeth, such that the cusp / fossa dimensions and relationships of the teeth concerned enable the occlusal scheme for the teeth to be changed from lingualised to balanced occlusion simply by softening the wax or resin under the upper posterior teeth and rotating the upper buccal cusps downwards around the said palatal cusps on the upper teeth with such palatal cusps still substantially remaining within the centric stops of the lowers.

The invention belongs to the technical field of medical computer-aided designs and particularly discloses an intelligent design method of a digital model for an oral digital impression instrument. Themethod comprises the steps of data acquisition, data preprocessing, intelligent design, alternative dental crown matching, dental pattern adjustment and the like. A to-be-produced tooth is rapidly and accurately produced through extracting a distance between adjacent teeth of the to-be-produced tooth, buccal and lingual dental arch crown curves, a gum diameter height and cusp pit and fissure ridge shape features of opposite jaws, performing intelligent matching and adjusting alternative dental crown models, so that the processing speed of a false tooth is increased and an intermediate link ofprocessing is reduced.

An orthodontic device-setting tool is provided with: a fitting section having a fitting surface, which covers and fits together with at least one of the incisal margin, the dental cusp, or the occlusal surface of a tooth; a foundation section, which has a back surface that adheres closely to the labial / buccal surface or the lingual surface of the tooth and has, on the surface opposite the back surface, a front face on which the orthodontic device is mounted; and a connecting section that connects the fitting section and the foundation section. The tool has a frame section, which protrudes from the front face of the foundation section and can fit together with the orthodontic device. Use of the orthodontic device-setting tool makes it possible to mount orthodontic devices such as corrective brackets without holding the patient for long periods of time and to mount the orthodontic devices accurately at the desired three-dimensional mounting positions for the orthodontic devices regardless of the skill level of the dentist practitioner. Moreover, the tool can even be used with mass-produced general purpose orthodontic devices, which are not orthodontic devices that have been specially customized as to design, cut, etc. for individual patients.

The invention relates to a tooth cleaning kit, which consists of a work tip unit, a polishing unit and a fixed frame unit. The work tip unit includes supragingival tooth cleaning work tip, a shallow periodontal tooth cleaning work tip and a deep periodontal tooth cleaning work tip; the end face of the supragingival tooth cleaning work tip head is a beveled end face, and the end faces of the shallow periodontal tooth cleaning work tip and the deep periodontal tooth cleaning work tip are both tips; during use, firstly the supragingival tooth cleaning work tip is utilized to remove supragingival and tooth neck calculuses, dental plaques and dental cusp hard matters; then the shallow periodontal tooth cleaning work tip is employed to eliminate shallow periodontal calculuses and dental plaques rapidly and thoroughly; the deep periodontal tooth cleaning work tip is utilized to remove periodontal deep calculuses; and then a polish brush is employed to conduct preliminary polishing on the cleaned tooth faces, and a prophy cup is adopted for fine polishing. The tooth cleaning kit provided by the invention realizes leveling and polishing of tooth surfaces while rapidly and thoroughly cleaning teeth.

The invention relates to a digital design method for the shape of a bionic dental crown with individual functions. The steps are: batch scan normal occlusal upper and lower jaw dentition as a standard template database; is the data D1; use the adjacent teeth and opposing teeth in D1 as the common area to match with the data in the standard template database, and select the matching data D2; use the crown data in D2 at the same position as the tooth to be repaired and the data to be repaired Dental preparations were fused to generate initial restoration data; the cusps were staggered and adjusted so that there was no intersection with the opposing teeth; the functional occlusal surfaces of the two adjacent teeth in the mesiodistal and the crowns on the opposite side of the dental arch were extracted , to generate the motion trajectory of the teeth to be repaired; use the envelope surface of the movement of the opposing cusp as the functional occlusal surface shape of the teeth to be repaired. The invention can imitate the process of senior dental experts designing the bionic axial surface, the functional occlusal surface and the physiological wear surface of the tooth, so as to realize the rapid bionic design.

The invention discloses a position and configuration parameter measuring method of a digital denture. The method comprises the following steps: introducing a denture model; adjusting a coordinate system of the denture model, so that a coordinate direction dir of the denture model, wherein the coordinate direction dir satisfies the following relations that an z axle is parallel to the direction ofa long axis, an x axle is parallel to a far-middle-near direction, a y axle is parallel to a buccolingual or labiolingual direction, and the directions of the x axle, the y axle and the z axle conforms to a right-hand rule; in accordance with the coordinate direction dir, recognizing five appearance high points of a denture within an h height range in a mode of calculating coordinate extreme values, wherein the h is a preset height threshold and the h is used for predicting a distance from a dental cusp to a gingival margin; and in accordance with the five appearance high points of the denture, calculating two appearance dimensions and three datum planes. According to the method provided by the invent, by adding the height threshold h, the method not only has the property of being strong in operability but also guarantees the reliability of a recognition result; the method, which calculates the two appearance dimensions and the three datum planes in accordance with the five appearancehigh points of the denture, is more convenient. The method provided by the invention can be widely applied to the denture repair field.

The invention relates to a tooth cleaning kit, which consists of a work tip unit, a polishing unit and a fixed frame unit. The work tip unit includes supragingival tooth cleaning work tip, a shallow periodontal tooth cleaning work tip and a deep periodontal tooth cleaning work tip; the end face of the supragingival tooth cleaning work tip head is a beveled end face, and the end faces of the shallow periodontal tooth cleaning work tip and the deep periodontal tooth cleaning work tip are both tips; during use, firstly the supragingival tooth cleaning work tip is utilized to remove supragingival and tooth neck calculuses, dental plaques and dental cusp hard matters; then the shallow periodontal tooth cleaning work tip is employed to eliminate shallow periodontal calculuses and dental plaques rapidly and thoroughly; the deep periodontal tooth cleaning work tip is utilized to remove periodontal deep calculuses; and then a polish brush is employed to conduct preliminary polishing on the cleaned tooth faces, and a prophy cup is adopted for fine polishing. The tooth cleaning kit provided by the invention realizes leveling and polishing of tooth surfaces while rapidly and thoroughly cleaning teeth.

The invention discloses a generation method of overflowing holes, a terminal and a storage medium. The method comprises the following steps: acquiring a second central point according to a first central point of a bounding box of a dental arch model, a tooth tip direction and a first preset offset distance; constructing n first rays by taking the second central point as a starting point; taking anintersection point of the first rays and the outer wall surface of the dental arch model as a first intersection point; constructing second rays along a negative direction of a normal of an outer wall surface at the first intersection point by taking the first intersection point as a starting point; acquiring an intersection point, which is nearest to the first intersection point, in the intersection points of the second rays and an inner wall surface of the dental arch model as a second intersection point; constructing a first cylinder penetrating the inner wall surface and outer wall surface of the dental arch model by virtue of a first preset radius; and carrying out Boolean calculation difference set processing on the dental arch model and the first cylinder, so as to generate the overflowing holes. According to the generation method, the problems that the sizes and shapes of overflowing holes generated for a dental arch model in dental three-dimensional design software are fixed,and therefore, partial overflowing holes cannot play a role of overflowing are solved.

A dental instrument includes at least one removable or replaceable dental tip. The dental instrument includes a spring actuated collet and collar housed internally within a handle. The handle includes a handle center affixed to a center rod and a grip portion housing the collet and collar and a handle center affixed to a center rod. The center rod is affixed to the collet. The collet includes spring fingers that are biased radially inward by the collar to retain the dental tip. When the grip portion of the handle is rotated about a longitudinal axis of the handle relative to the handle center, camming surfaces associated with the grip portion and the handle center cause translational movement along the longitudinal axis to engage or disengage the collar from the collet.

The invention relates to a complete dentition full denture finished product resin tooth, which comprises an upper denture, a lower denture, an upper dentition and a lower dentition, wherein the upper dentition is fixedly connected with the upper denture; the lower dentition is fixedly connected with the lower denture; and the upper dentition and the lower dentition are engaged with each other and are integral dentitions respectively. According to the complete dentition full denture finished product resin tooth, during arrangement of teeth and wearing, the upper dentition and the lower dentition are quickly and centrally engaged, so that the arrangement efficiency of the teeth is increased, the difference in tooth arrangement level of technicians is reduced, and the aims of guaranteeing wide close contact, reducing the clinical occlusal adjustment time and shortening the treatment time of patients are fulfilled. Each tooth is arranged according to an inclination angle in the tooth arrangement standard and positional relation of each dental cusp and an occlusal plane; the upper dentition and the lower dentition are matched teeth and are centrally engaged without error basically; the chair-side occlusal adjustment time of the full denture is reduced; the treatment time is shortened; and the comfort and the satisfaction of patients are improved.

The invention relates to the technical field of medical appliances, in particular to a special bolt driver for a bone screw. The special bolt driver comprises a handle and a bolt driver body, and is characterized in that the front end of the bolt driver body is provided with two teeth; the back end of the bolt driver body is provided with a locating block; the teeth are made of stainless steel materials, dental cusps of the teeth are opposite; a direction-turning device groove is arranged in the handle; and a direction-turning device is arranged in the direction-turning device groove and formed by a rotating shaft, a gear wheel, a cone, a locating ball, a spring, the locating plate, a locating piece and a wrench pin. Because the structure is adopted, the special bolt driver for the bone screw can be detachably stored, is beneficial to carrying and disinfection, and has the advantages of novel structure, fastness, reduction of patient pains, convenience for installation and disassembling and the like.

The invention discloses a generation method, terminal and storage medium of an overflow hole. The method includes: obtaining the first center point, the tooth cusp direction and the first preset offset distance of the bounding box of the dental arch model. Two central points; construct n first rays with the second central point as the starting point; take the intersection of the first ray and the outer wall of the dental arch model as the first intersection; take the first intersection as the starting point, along the outer wall at the first intersection Construct the second ray in the negative direction of the normal line at the position; obtain the intersection point closest to the first intersection point among the intersection points between the second ray and the inner wall of the dental arch model, and use it as the second intersection point; use the first preset radius to construct a penetrating inner wall of the dental arch model and the first cylinder on the outer wall; perform Boolean difference processing on the dental arch model and the first cylinder to generate overflow holes. The invention solves the problem that the size and shape of the overflow holes generated for the dental arch model in the existing dental three-dimensional design software are fixed, so that some overflow holes cannot play the role of overflow drainage.

A system for maximal cusp articulation comprising: a database including patient records and images, and a server in communication with the database, and the server includes virtual modeled geometries configured to receive two opposing dental models as The input processing circuit, wherein the two opposing dental models include the patient's upper dental model and the lower dental model. The processing circuit is further configured to detect an intersection region between the upper and lower dental models and perform a simulation on the two opposing dental models, wherein the simulation includes applying simulated physical rules at the two opposing dental models. The processing circuitry is further configured to: repeat the detection and simulation of the intersection region to generate a maximum cusp alignment of the two opposing dental models, mark the intersection region on the maximum cusp alignment, and output the maximum cusp alignment.

The invention discloses an invisible appliance with controllable thickness in all directions and a preparation method thereof, wherein the method comprises: preparing appliance films with different thicknesses; placing the appliance films with different thicknesses on teeth On the mold; adjust the position and direction of the dental mold according to the needs and carry out thermocompression molding to obtain the required invisible aligner. Through this method, it can be set that the cusp part of the invisible aligner is thicker, and the position requiring a larger corrective force is thicker, but the corrected part is not thinner. The thickness of the invisible aligner can be adjusted according to the actual correction plan, so as to achieve The control of the correction force in all directions improves the treatment effect, shortens the treatment cycle, improves the treatment experience of patients, and truly realizes personalized treatment.