52 results about "Tooth neck" patented technology

A stator assembly adapted for use in an external rotor electric motor. The assembly includes a stator core having a hub, a plurality of teeth extending radially outward from the hub, a root tooth diameter and an outer diameter. Each tooth has a root, a neck extending from the root and a head opposite the root. The neck has a maximum width. Each adjacent pair of teeth has a pitch measured at the roots of the corresponding teeth. The assembly includes a winding wrapped around each tooth of at least three teeth of the stator core. A ratio of the root tooth diameter of the stator core to the outer diameter of the stator core is less than about 0.75. A ratio of the maximum tooth neck width to the tooth pitch measured at the root of the teeth is greater than about 0.36.

The invention provides a 3D (three-dimensional) printing bionic dental implant and a manufacturing method thereof and belongs to the field of dental implants. Easy loosing and falling of an implant caused by relatively large difference between the elasticity modulus of the implant and the elasticity modulus of sclerotin can be avoided by the dental implant, the biological activity is relatively strong, and bone healing time can be greatly shortened. The 3D printing bionic dental implant comprises an implant body and also comprises a chitosan nanometer coating which is combined with the outer surface of the implant body into a whole. The implant body comprises a tooth neck base station and a tooth root which is positioned below the tooth neck base station and is integrally connected with the tooth neck base station, wherein the tooth root is of an all-layer three-dimensional network structure. The 3D printing bionic dental implant provided by the invention can be applied to immediate implantation of the dental implant.

The invention relates to a method for producing a dental prosthetic shaped part, such as a partial or total prosthesis, which is produced in multiple layers from a generatively produced solid-body model of at least one prosthetic tooth or one prosthetic dental arch, wherein the prosthetic teeth have, on the inner face of the tooth neck, a lumen into which a dentine-coloured, polymerizable composition is introduced. This composition is then polymerized in at least one step. The at least one prosthetic tooth with dentine-coloured composition is arranged with its cervical side on the tooth-side surface of the prosthesis base and pressed together. Thereafter, the partial or total prosthesis obtained is completely cured in a light-curing appliance. The invention likewise relates to the prosthetic shaped parts that are obtainable by the method according to the invention.

The invention discloses a design method and system of an individual healing abutment. The method comprises the following steps: establishing an oral 3D model by acquiring data of teeth and gums on various tooth positions of a plurality of patients, and saving the oral 3D model in a database; according to the oral 3D model in the database, acquiring the shapes and the sizes of tooth roots and tooth necks on the various tooth positions as well as the shapes and the sizes of junction surfaces of the tooth necks and the gums; and according to the shapes and the sizes of the tooth roots and the tooth necks on the various tooth positions as well as the shapes and the sizes of the junction surfaces of the tooth necks and the gums, determining the shape and the size of the bottom of a healing abutment corresponding to the various tooth positions, so that the shape and the size of the base of the healing abutment are identical to the shapes and the sizes of the junction surfaces of the tooth necks and the gums. By virtue of the healing abutment, tissue cuffs formed by the gums, same with that before tooth extraction, can be well matched with a prosthesis which is implanted in a later period, so that the abutment is in smooth transition with the prosthesis, and the problems of black triangle and stress on the abutment are avoided.

A stator assembly adapted for use in an external rotor electric motor. The assembly includes a stator core having a hub, a plurality of teeth extending radially outward from the hub, a root tooth diameter and an outer diameter. Each tooth has a root, a neck extending from the root and a head opposite the root. The neck has a maximum width. Each adjacent pair of teeth has a pitch measured at the roots of the corresponding teeth. The assembly includes a winding wrapped around each tooth of at least three teeth of the stator core. A ratio of the root tooth diameter of the stator core to the outer diameter of the stator core is less than about 0.75. A ratio of the maximum tooth neck width to the tooth pitch measured at the root of the teeth is greater than about 0.36.

The invention discloses a tooth three-dimensional digital model registration and tooth neck line extraction method based on oral scanning and CBCT, and relates to the field of tooth three-dimensional digital model registration. Comprising the following steps: respectively acquiring three-dimensional oral images of oral scanning and CBCT (cone beam computed tomography), and automatically segmenting three-dimensional structures of dental crowns and teeth by utilizing pre-trained V-Net and ToothNet image segmentation models. Alignment and registration of two modal images are realized through a feature extraction network, an information exchange network and a rigid transformation network. The feature extraction network extracts local and global features by using far-point sampling and a dynamic graph convolutional neural network, the self-attention and cross-attention module performs feature enhancement and information exchange between the same mode and different modes, and based on a registration result, a tooth neck line is further extracted and optimized. According to the method, the tooth three-dimensional digital model can be quickly and accurately registered, a high-precision tooth neck line extraction result is provided, the manpower and time cost of a medical institution can be reduced, and the medical efficiency is improved.

The invention provides a composite material as well as a preparation method and application thereof. The preparation method comprises the steps that phenolic hydroxyl of tannic acid, an amido bond ofsilk fibroin and an amido bond of 8DSS are combined to form hydrogen bonds, a composite material is synthesized, and 8DSS comprises an aspartic acid-serine-serine polypeptide sequence of eight repetitive sequences. According to the present invention, a wet adhesion material is adopted as a carrier, the bionic remineralization function is provided for the material, the material can be adhered to aneck tooth tissue in the wet environment, the strong interface bonding force can be maintained, the influence of saliva and gingival crevicular fluid can be resisted, and the remineralization can be continuously promoted so as to achieve the purposes of prevention, termination and repair of tooth neck lesions.

The invention relates to a tooth cleaning method. The first step is to remove calculus, plaque and hard objects on the gingiva and neck of the teeth; the second step is to remove superficial periodontal calculus and plaque; the third step is to remove deep teeth. Peripheral calculi; Step 4: Polish the tooth surface for the first time after tooth cleaning, to initially smooth the tiny pits on the tooth surface that may be caused by the first three steps of tooth cleaning, and at the same time remove the teeth that cannot be removed by the first three steps of tooth cleaning Subtle remaining spots; Step 5: Carry out a second polishing on the tooth surface after the first polishing, to ensure that the tooth surface is smooth and smooth; thereby using the tooth cleaning method of the present invention to clean teeth can not only clean thoroughly Teeth, while achieving smoothing and polishing of the tooth surface. The tooth cleaning method of the present invention uses a personal tooth cleaning kit to clean teeth, which is safer and more hygienic, and effectively avoids the problem of cross infection of patients.

The invention relates to a tooth cleaning suit which comprises a working tip unit, a polishing unit and a fixing frame unit, wherein the working tip unit comprises a tooth cleaning working tip for gum, a tooth cleaning working tip for shallow periodontal parts and a tooth cleaning working tip for deep periodontal parts; the polishing unit comprises a polishing brush for polishing tooth surfaces as well as a polishing cup; and the fixing frame unit comprises a fixing plate positioned at the upper layer and a support plate positioned at the lower layer. When the tooth cleaning suit is used, firstly the tooth cleaning working tip for gum is used for removing calculus on the gum and tooth neck, dental plaque and cusp hard matters; then the tooth cleaning working tip for the shallow periodontal parts is used for removing calculus and dental plaque on the shallow periodontal parts; the tooth cleaning working tip for the deep periodontal parts is used for removing calculus on the deep periodontal parts; and then the polishing brush is used for preliminarily polishing the cleaned tooth surfaces, and the polishing cup is used for finely polishing the cleaned tooth surfaces, thereby ensuring that the tooth surfaces are flat and smooth. The tooth cleaning suit provided by the invention can be used as a personal exclusive tooth cleaning suit, is further safe and sanitary, and is capable of thoroughly cleaning teeth while flattening and polishing the tooth surfaces.

The invention discloses a method for establishing a mouse periodontal disease model. The method comprises the following steps of (1) performing anaesthesia on the abdomen of a mouse to be subjected to model establishing, and fixing the mouse on a mouse table in a lying manner; (2) cushioning the head of the mouse, enabling the mouse to stably open the mouth with a mouth gag to expose a mandibular molar region, then cleaning a mandibular molar and cheek and tongue side gum with physiological saline, and sufficiently drying a surgery region with a dry cotton ball; (3) inlaying suture lines into a position under the contact point of adjacent surfaces of a first molar and a second molar of the left-side lower jaw with microscopic needle forceps, and after inlaying the suture line is guaranteed, tying a knot at the position of the mesial tooth neck part of the first molar of the lower jaw; and (4) inspecting the stability degree of the knotted suture lines, and after the stability degree is confirmed, completing establishing of the periodontal disease model. According to the method disclosed by the invention, the method for establishing a novel mouse periodontitis model is realized based on the first molar of the lower jaw. The imageology analysis result on local tissue of established mouse model certificates that by the method, the mouse periodontitis model can be successfully established, and the pathology process of a clinical periodontal disease is fully simulated.

The invention relates to a manufacturing method of a comfortable full-mouth adsorption false tooth meeting an aesthetic function, and belongs to the field of false tooth manufacturing, wherein the method comprises the steps: drawing a central line, a mouth angle line and a lip base line on a temporary base plate loaded with a wax rim after occlusion mouth testing, and taking a bisector of jaw spacing after mouth testing; marking out an incision edge connecting line of the anterior incisor below the lip base line, and marking out a smile line above the lip base line; connecting the incisor edge line of the anterior incisor with the bisector of the jaw spacing after mouth testing to form a tooth arrangement plane curve on the same plane, wherein the mouth angle line is a positioning line between a three-tooth distal center and a four-tooth proximal center, the curve length from the mouth angle line to the central line is the basis for determining the width specification of the whole set of false tooth, the smile line is a base line for determining the tooth neck of the anterior incisor, and the distance from the smile line to the incisor edge connecting line of the anterior incisor is the basis for determining the height specification of the whole set of false tooth. Therefore, specification parameters of the whole set of false teeth and tooth arrangement positions of the false teeth can be determined, and the method is simple and easy to implement and has aesthetic characteristics on the premise of meeting false tooth functions.

An artificial tooth 30 to be polished is fixed at a tooth neck 32 side and rotated about a tooth axis 33. Abrasives, preferably elastic abrasives formed by kneading abrasive grains into or supporting abrasive grains on an elastic material, are ejected together with a compressed gas at an ejection pressure of from 0.1 MPa to 0.5 MPa onto an occlusal portion 31 side of the artificial tooth 30 while the artificial tooth 30 is being rotated. The abrasives are ejected at an inclination angle θ with respect to the tooth axis 33 of the artificial tooth 30 of from 0° to 90°, and preferably from 15° to 75°. Portions on the occlusal portion 31 and side surfaces 38 of the artificial tooth 30 are thereby polished at the same time by the abrasive sliding over these portions.

A saw blade (4) for a machine operating with adjacent saw teeth traveling in two opposite and parallel directions comprises a blade substrate, teeth (16), and tooth necks (30) formed at the periphery of the substrate for holding the teeth (16) in place. Each tooth neck (30) has a protection surface (34), which is located in a plane that is parallel to the plane of the blade substrate (8), for protecting the tooth (16) against impact with any part of said adjacent saw blade. Each tooth (16) is located on the respective neck (30) in such a way that the tooth (16) is displaced from the protection surface (34) and from the adjacent saw blade in a direction normal to the plane of the protection surface (34).

The invention discloses a design method and system of an individual healing abutment. The method comprises the following steps: establishing an oral 3D model by acquiring data of teeth and gums on various tooth positions of a plurality of patients, and saving the oral 3D model in a database; according to the oral 3D model in the database, acquiring the shapes and the sizes of tooth roots and tooth necks on the various tooth positions as well as the shapes and the sizes of junction surfaces of the tooth necks and the gums; and according to the shapes and the sizes of the tooth roots and the tooth necks on the various tooth positions as well as the shapes and the sizes of the junction surfaces of the tooth necks and the gums, determining the shape and the size of the bottom of a healing abutment corresponding to the various tooth positions, so that the shape and the size of the base of the healing abutment are identical to the shapes and the sizes of the junction surfaces of the tooth necks and the gums. By virtue of the healing abutment, tissue cuffs formed by the gums, same with that before tooth extraction, can be well matched with a prosthesis which is implanted in a later period, so that the abutment is in smooth transition with the prosthesis, and the problems of black triangle and stress on the abutment are avoided.

The utility model belongs to the technical field of rivets, and relates to a capped rivet which comprises a rivet shell and a rivet core, the rivet core is sequentially provided with a rivet head, a fracture, a hand riveter combination section and a friction wire from top to bottom, the rivet core is provided with reverse buckling teeth, the rivet shell is provided with buckling tooth necks matched with the reverse buckling teeth, and the rivet shell is provided with at least one crumple groove. The nail further comprises a cap matched with the bottom of the nail shell. The inverted buckling teeth are arranged on the rivet core, the inner wall, extruded into a drum, of the deformed rivet shell is buckled into the teeth of the inverted buckling teeth to achieve mutual embedding, therefore, the metal elasticity of the rivet shell deformed into the drum is resisted, the connection strength of the rivet shell is further guaranteed, and meanwhile after connection is completed, the cap is buckled on the bottom of the rivet shell to achieve blocking.

The invention discloses a fixed clamp holder and a tooth neck subgingival defect repair auxiliary system, and belongs to the technical field of medical instruments, the fixed clamp holder comprises a handle and an operation head located at the end of the handle, the operation head is provided with an operation mechanism, the operation mechanism comprises a clamping part rotationally connected to the operation head and an adjusting part used for rotating the clamping part, and the clamping part is provided with a clamping groove. The clamping part comprises two clamping arms, and the included angle between the two clamping arms is adjustable. The bending degree of the forming piece can be changed by changing the opening angle of the two clamping arms, so that the forming piece is preformed, the shape of the forming face is easier to control, the forming face is more accurately attached to the radian of natural teeth, the two clamping arms can be integrally rotated through the adjusting part, the orientations of the two clamping arms are changed, and the repairing requirements of different orientations are met; and the adjacent surface contour recovery effect is ensured.

The invention discloses a healing scanning body with a biological anatomical structure and a preparation process of the healing scanning body, belongs to the technical field of dental implants, and mainly solves the technical problems that an existing implant abutment cannot be completely consistent with a natural tooth neck in shape, food impaction and gingival inflammation infection are easily caused, the workload of a doctor is large and a patient needs to bear more pains. According to the technical scheme, the healing scanning body with the biological anatomical structure comprises a scanning body part, a gum penetrating part and a connecting interface part which are sequentially arranged from top to bottom; the appearance feature of the a scanning body part is preset in a background database according to actual scanning requirements; the gum penetrating part structure is consistent with a gum penetrating outline part of a tooth neck form of a tooth position needing implantation; and the shape of the connecting interface is matched with that of a target implant structure. The healing scanning body has the advantages of wide application range, reasonable structural design, simple process, easiness in operation and the like.

The utility model provides a buffer retention elastic jaw pad which is wrapped on the outer surface of teeth of a patient and comprises a double-layer soft and hard pressure membrane, a bulge arranged on the double-layer soft and hard pressure membrane and a dovetail-shaped window arranged at the tail end of the double-layer soft and hard pressure membrane, the double-layer soft and hard pressing membrane comprises a hard layer and a soft layer, the hard layer is the outer layer of the double-layer soft and hard pressing membrane, and the soft layer is the inner layer of the double-layer soft and hard pressing membrane; the protrusions, the dovetail-shaped windows and the double-layer soft and hard pressing membrane are integrally formed. The side, close to the gingival margin of the tooth neck of the patient, of the buffer retention elastic jaw pad is a jaw pad edge, the jaw pad edge is an inclined plane, and the inclination angle is 30 degrees. The double-layer soft and hard compressed membrane is of a double-layer structure combining polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol ester and thermoplastic polyurethane, has elasticity, is comfortable to wear by a patient, and is convenient to take and wear; and the double-layer soft and hard compressed membrane simulates an intraoral occlusion state through double-jaw occlusion, so that the double-layer soft and hard compressed membrane has a tooth fossa shape which is the same as that of the teeth of the patient, and the chewing function of the patient is improved.

The invention provides a method for manufacturing an anatomical healing abutment finished product suite and the anatomical healing abutment finished product suite, and the method comprises the steps: generating a grouping and parting rule for tooth neck shapes based on a tooth neck shape database; designing and manufacturing an anatomical healing abutment form model set according to the grouping and typing rule aiming at the tooth neck form; and based on the anatomical healing abutment form model set, prefabricating an anatomical healing abutment finished product suite containing multiple models, the anatomical healing abutment finished products in the anatomical healing abutment finished product suite having grouping numbers and models corresponding to the grouping and parting rules. According to the technical scheme, the form of the gingival penetrating key area of the healing abutment can be highly matched with the ideal gingival penetrating outline, and no extra treatment procedure is needed.

The invention is concerned with a kind of mouth equipment to cure blocking sleeping and breathing pause and low aerating syndrome for adjusting by sufferer. It solves the problem that the upper and down jaws cannot move freely, the best position of mandible cannot adjust by sufferer and the swallow and language can be influenced of existing equipment. The upper and down jaws holds are made according to the tooth of each sufferer, and set a draught button on the triangle clearance among the upper jaw hold, side incisor and incisor, and tooth neck part. Set a draught button on the triangle clearance among the down jaw hold, the first molar and the second molar, and tooth neck part. The draught buttons of upper and down jaw hold are on the opposite direction to each other, and they connect with each other by spring draught equipment. This invention is comfortable for sufferer to increase the cure of OSAHS.

An artificial tooth 30 to be polished is fixed at a tooth neck 32 side and rotated about a tooth axis 33. Abrasives, preferably elastic abrasives formed by kneading abrasive grains into or supporting abrasive grains on an elastic material, are ejected together with a compressed gas at an ejection pressure of from 0.1 MPa to 0.5 MPa onto an occlusal portion 31 side of the artificial tooth 30 while the artificial tooth 30 is being rotated. The abrasives are ejected at an inclination angle θ with respect to the tooth axis 33 of the artificial tooth 30 of from 0° to 90°, and preferably from 15° to 75°. Portions on the occlusal portion 31 and side surfaces 38 of the artificial tooth 30 are thereby polished at the same time by the abrasive sliding over these portions.

The invention is concerned with a kind of mouth equipment to cure blocking sleeping and breathing pause and low aerating syndrome for adjusting by sufferer. It solves the problem that the upper and down jaws cannot move freely, the best position of mandible cannot adjust by sufferer and the swallow and language can be influenced of existing equipment. The upper and down jaws holds are made according to the tooth of each sufferer, and set a draught button on the triangle clearance among the upper jaw hold, side incisor and incisor, and tooth neck part. Set a draught button on the triangle clearance among the down jaw hold, the first molar and the second molar, and tooth neck part. The draught buttons of upper and down jaw hold are on the opposite direction to each other, and they connect with each other by spring draught equipment. This invention is comfortable for sufferer to increase the cure of OSAHS.

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 utility model discloses a forming piece clamping ring, which belongs to the technical field of medical instruments and comprises an arch ring and two clamping heads, the two clamping heads are arranged at two ends of the arch ring, one side of each clamping head facing a gum is provided with a through groove, and the through grooves allow wedges to penetrate from the outside to the clamping surfaces of the clamping heads. The clamping surface is provided with a first concave area and a second concave area which are respectively arranged on two sides of the passing groove, the first concave area and the second concave area form a clamping edge in a transition area of the clamping surface of the clamping head, the clamping edge comprises a head end contact point and a tail end contact point, the head end contact point is used for corresponding to a dental crown position of a damaged tooth, and the tail end contact point is used for corresponding to a dental crown position of the damaged tooth. The tail end contact point is used for corresponding to the tooth neck position of the damaged tooth. Compared with a traditional forming clamping piece, the contact point of the clamping ring of the forming piece and the lowermost position of the forming piece is designed to be lower, the tooth anatomical form of a tooth structure with a low dental crown and a narrow tooth neck is better met, bounce is prevented, and clamping is more stable.

The utility model provides a multipurpose invisible orthodontic device which is characterized in that a pressing block is arranged on an invisible tooth socket close to the tongue side or the lip-cheek side, one end of the pressing block faces an occlusal surface, the other end of the pressing block faces a tooth neck, and the end face, facing the occlusal surface, of the pressing block is arranged to be a plane. And the edge of one side, far away from the teeth, of the plane is arranged to be a convex smooth transition inclined plane. If the lower anterior teeth are in contact with the pressing block which is sleeved on the middle part of the upper jaw teeth, the inclined surface of the pressing block can guide the lower anterior teeth to be in a protraction position, so that the lower jaw can be guided forwards, and the plane part of the pressing block plays a role in pressing the lower anterior teeth, so that the pressing of the anterior teeth and the correction of deep overbite are facilitated; and if the rear teeth are in contact with the pressing blocks which are worn on the maxillary teeth or the mandibular teeth and are close to the left side and / or the right side, the planes of the pressing blocks can assist in pressing the corresponding maxillary and mandibular rear teeth, so that correction of locking of the rear teeth is facilitated.

The utility model relates to the technical field of zippers, in particular to anti-hooking chain teeth, a chain tooth machining mold and a zipper. The anti-hooking chain tooth comprises a tooth body, a tooth neck portion and a tooth head portion, and the tooth neck portion is arranged between the tooth body and the tooth head portion and connected with the tooth body and the tooth head portion. The end, away from the tooth neck part, of the tooth head part is provided with a first surface, the side of the tooth head part is provided with a second surface, and the end of the tooth head part is provided with a third surface. Tooth grooves are formed in the first surface, the second surface and the first surface are in arc transition connection, the third surface and the first surface are connected through a first chamfer, the radius R of the first chamfer is larger than or equal to 0.9 mm and smaller than or equal to 1 mm. The first surface and the second surface are in arc transition connection, the connection smoothness is improved, the third surface and the first surface are connected through the first chamfer, and the radius R of the first chamfer is set to be larger than or equal to 0.9 mm and smaller than or equal to 1 mm, so that snagging on cloth of clothes and the like in contact with the chain teeth is not prone to occurring, and meanwhile the touch feeling of the chain teeth is improved.

A stator of an electric motor includes a tooth and a coil body. The tooth can be radially divided, from a central axis of the stator, into consecutive portions being a tooth root, a tooth neck and a tooth head. The tangential dimensions of the tooth root and tooth head project beyond those of the tooth neck. The coil body is U-shaped and, after attachment to the tooth, at least partially axially and radially covers the portions. The coil body can be force-lockingly secured to the tooth, between the tooth root and the tooth head, in a radial direction relative to the central axis. An electric motor having the stator is also provided.