19 results about "Premolar tooth" patented technology

The utility model provides a bone anchorage type maxillary distraction osteogenesis device which comprises a spiral expansion device, and a rear base plate of the spiral expansion device is fixed to the rear half section of the maxillary bone through a left anchorage nail and a right anchorage nail. The front base plate and the rear base plate are respectively connected with at least two belt rings through belt ring connecting rods, the left front belt ring and the right front belt ring connected with the front base plate are at least sleeved on the first front molars on the corresponding sides, and the left rear belt ring and the right rear belt ring connected with the rear base plate are sleeved on the first molars and / or the second molars on the corresponding sides; the two front band rings are connected through a labial arch, and a lip baffle is fixed in the middle of the labial arch; a traction hook matched with a front tractor is fixedly connected to the outer ring face of the rear belt ring. According to the utility model, the osteotomy gap between the first premolar and the second premolar can be stably and effectively stretched, so that the aim of correcting skeletal hypoplasia or repairing bone defects is fulfilled.

The utility model discloses a molar mesial movement auxiliary device which comprises a main arch wire, a plurality of orthodontic brackets, an auxiliary arch wire, a ligature wire and an anchorage nail, the main arch wire penetrates through the orthodontic brackets and is fixed with the orthodontic brackets, two question mark hooks of the auxiliary arch wire are sleeved on the main arch wire, and the ligature wire is connected with the anchorage nail. The auxiliary arch wire is further provided with two small circles formed by bending, the small circle in the distal direction is rigidly connected to an anchorage nail planted on the alveolar bone through a fixing ligature wire, and the other small circle is free. According to the utility model, a stable rectangular structure can be formed, after force application, interference caused by lip and cheek movement or feeding is avoided, displacement is avoided, foreign body sensation is reduced, the bad effect of distal movement of anterior teeth and premolars can be avoided, friction force of tooth movement is not increased, and meanwhile, the structure is simple and convenient. And when the molars move forwards, the lip inclination acting force on the anterior teeth is also reduced.

This invention relates to a mandibular premolar guiding device for reducing labial inclination of the lower anterior teeth. The device includes an upper molar band, a lower molar band, a premolar guide, a push plate, and an implant. The upper and lower molar bands are fixed to the upper and lower molars, respectively. The premolar guide is located on the buccal side of the upper molar band, and the push plate is fixed on the buccal side of the lower molar band. The front end of the premolar guide bends downward to form a pusher portion. During occlusion, the pusher portion pushes against the push plate to achieve mandibular premolar guidance. The buccal side of the lower molar band also has a buccal tube. The lower incisor has a bracket. The buccal tube and the bracket are connected by a lower archwire. The lower archwire has a lower traction hook corresponding to the lower incisor. The implant is located between the lower molar and the lower premolar. The implant and the lower traction hook are connected by a traction member. This device can simultaneously achieve mandibular premolar guidance and reduce labial inclination of the lower anterior teeth.

An orthodontic appliance for partial distalization of a posterior mandibular region is disclosed. The appliance includes a mesial element having a mesial base surface configured for attachment to a premolar or canine, a protrusion for connecting to a retraction element, and an arm. The arm includes a lateral pivot at a distal end of the arm. The appliance further includes a distal element having a distal base configured for attachment to a molar and a distal cap, the lateral pivot being disposed between the distal base and the distal cap. A method of assembling the orthodontic appliance is also provided.

The invention discloses an oral orthodontic device with traction and molar distalization functions, and relates to the technical field of orthodontics. The device comprises a gum and an arch expander located on the gum, wherein the arch expander is divided into a left part and a right part; the gum comprises a dental arch and a plurality of premolars and postmolars positioned on the upper side of the dental arch, and the premolars and the postmolars are divided into a left part and a right part; the arch expanding device comprises a box body, molar bands located on the premolar and the postmolar, and a push rod arranged between the two molar bands. The reel is arranged in the box body, the connecting piece located on the peripheral side of the reel can be wound or released, when the connecting piece is wound, the connecting piece gradually gets close to the reel, so that the molar band is driven to move, the function of distally moving the molar is achieved, and the movement of the molar band can transmit force through the push rod; therefore, the whole oral cavity correction device applies proper acting force to the dental arch so as to achieve the effect of forward traction.

To provide an improved crown structure which has high discharge efficiency, allows visual confirmation of the adhesive filling state, ensures the structural strength of the crown, prevents the accumulation of food residues and suppresses intraoral infection, does not require the re-removal of a sealing member after surgery, is adaptable to various tooth positions such as anterior teeth, premolars and molars, and can improve the effectiveness and safety of dental prostheses. [Solution] This invention relates to an improved crown structure in the field of dental prosthetics, and includes a crown body 1 that conforms to the shape of an abutment tooth. The crown body is formed with drain holes that penetrate from the bonding surface 3 to the outer surface 4, and the drain holes have a gradually changing diameter structure. The drain holes have a guide groove on their inner periphery, a conical flared opening on the bonding surface side, and an annular reinforcing rib on the outer surface side. The crown also includes a biodegradable sealing member.

An orthodontic appliance and assembly for distal movement of segments in the posterior jawbone region is disclosed. The orthodontic appliance comprises a mesial element having a mesial base surface configured for attachment to a premolar or canine, an arm having a pivot at the distal end of the arm, and a distal element having a distal base surface configured for attachment to a molar. The distal element or distal portion of the arm comprises a distal anchoring structure for connecting a first distal movement force element. The mesial element may have a projection defining a groove for fitting an elastic band, the groove being positioned along a rounded convex surface of the projection having a diameter of at least 3 mm. A method of treatment is also provided.

The utility model provides an appliance for correcting Angler class III malocclusion. Comprising an upper jaw casting type expansion device, a lower jaw casting type lip shield and an elastic connecting piece, and the upper jaw casting type expansion device comprises a spiral expander, a front palatal bar, a rear palatal bar, a palatal side connecting rod, an anterior tooth separated palatal arch, a cheek side traction hook, an upper jaw first premolar casting belt ring and an upper jaw first molar casting belt ring; a cheek tube is arranged on the upper jaw first molar casting belt ring; the lower jaw casting type lip shield comprises a labial arch, a lingual arch and a lower jaw first molar casting belt ring, and a lip shield traction hook is arranged at the front part of the labial arch; the elastic rubber ring is used for traction between the cheek tube and the lip shield traction hook of the appliance, and is matched with the rapid expansion and contraction of the maxillary to achieve the effect of correcting III-type malocclusion, so that a patient can wear the appliance all day long, the development of the maxillary bone is promoted, the correction period is accelerated, and the appliance does not need to depend on a mask tractor outside the mouth.

The utility model provides a mandibular push molar distalization device suitable for bony class III malocclusion, which comprises a tail end guide rail, a front end guide rail, a push rod and a sleeve type push spring, the tail end guide rail is fixed on the last tooth needing to be moved, the front end guide rail is fixed on canine teeth or first premolar teeth at the turning position of a dentition dental arch, and the push rod is fixed on the sleeve type push spring. A push rod is arranged between the tail end guide rail and the front end guide rail in a penetrating mode, a traction hook is arranged at the end, penetrating through the front end guide rail, of the push rod, a tail end blocking ball is arranged at the other end, penetrating through the tail end guide rail, of the push rod, a sleeve type push spring is movably connected between the tail end guide rail and the front end guide rail in a sleeved mode, and a free buckle for blocking and limiting the sleeve type push spring is arranged on the push rod. The traction hook is connected with a jaw anchorage component such as an anchorage nail through a rubber band. The mandibular molars can be pushed to the distal direction, the mandibular molars can be pushed to the distal direction, meanwhile, the mandibular molars can assist in promoting the development of the maxilla and inhibiting the development of the mandible for other clinical bony III-type malocclusion orthotic devices, the structure is scientific and reasonable, the mandibular molars are simple and practical, the mechanical analysis is simple and clear, the use comfort of a patient is high, and the orthotic effect is good.

This application discloses a novel device for simultaneously expanding and depressing the mandibular anterior teeth to relieve posterior tooth occlusion, relating to the field of orthodontic technology. It includes a maxillary cast-crown spiral expander, a metal mesh split-plane guide, and traction clips. The maxillary cast-crown spiral expander comprises a cast crown and a spiral expander. The cast crown is used to secure the first premolar, second premolar, and first molar, and the spiral expander is fixedly connected to the cast crown. The metal mesh split-plane guide conforms to the anterior part of the maxillary palate and is fixedly connected to the cast crown. The traction clips are located on the buccal side of the cast crown and are cross-pulled by elastic bands with traction clips located on the lingual side of the mandibular posterior teeth. This application simultaneously expands the arch to solve the problems of maxillary width and vertical misalignment, and utilizes the maxillary cast-crown spiral expander as a reinforcing anchorage to prevent elongation and rotation of the maxillary anchorage teeth. It matches the width of the maxilla and mandible while minimizing anchorage loss, thus relieving posterior tooth occlusion.

The application discloses a double-main-groove three-section multifunctional oral cavity correction system, which comprises self-locking brackets, a first buccal tube, a second buccal tube and an arch wire system. The self-locking brackets are arranged on all incisors, canines and premolars in a tooth system, and the self-locking bracket comprises a bracket body and a bottom plate, and the bracket body and the bottom plate are connected. The application further discloses a double-main-groove three-section multifunctional oral cavity correction method. The application combines the segment arch technology, the auxiliary arch technology and the sliding method gap closing technology, and greatly reduces the friction uncontrolled, the unfavorable alignment and the loss of anchorage in other correction systems, so that the correction result is more controllable.

A device for integrally closing front teeth scattered in a gap comprises a retention and connection device which integrally wraps all teeth in a dentition and is made of an orthodontic pressed film retainer high polymer material; the traction devices are located at the adjacent gaps of the lip and buccal surfaces of the front molar areas or molar areas on the two sides and are arranged in a bilateral symmetry mode, and the upper edges of the traction devices are flush with the junctions of the crown middle 1 / 3 and the crown neck 1 / 3 of the lip and buccal sides of the teeth; the lingual vacuoles are located on the lingual sides of the teeth of the patient, the height of the inner walls of the lingual vacuoles is consistent with the sagittal height of the teeth, and the shape of the inner walls of the lingual vacuoles is completely matched with the shape of the lingual sides of the teeth; the force application device is an elastic body part and is made of one of an elastic rubber ring, a rubber chain or a rubber line; the positioning window is a horizontal groove-shaped window formed in the fixing and connecting device and penetrates through the traction devices on the left side and the right side. According to the utility model, the problems of low correction efficiency, long treatment period, discomfort of a patient in wearing and high treatment cost in the prior art are effectively solved.

An apparatus for treating sleep apnea and other sleeping disorders, including snoring and bruxism, but also mouth cavity hygiene, and also possibly drug delivery is provided. The apparatus comprises a device configured to be installed on a user's teeth to maintain a relative position of the upper and lower jaws, and a holding material. The device comprises at least one back part, such as a first back part, a second back part and connecting portion (if two back parts are provided), the first back part having an upper side and a lower side configured to contact at least one premolar and / or molar of the upper and lower jaws, respectively, of the right side of a user's teeth when the user's teeth are in a substantially closed position, and the second back part having an upper side and a lower side configured to contact at least one premolar and / or molar of the upper and lower jaws, respectively, of the left side of the user's teeth when the user's teeth are in a substantially closed position, the connecting portion connecting the first and second back parts and configured to extend along the front teeth of the user's teeth. The holding material is included in or configured to be applied to the first and second back parts to secure contact of the teeth with the first and second back parts, respectively, by creating an adhesive effect, a vacuum effect, or a mechanical holding effect on the teeth in contact with the first and second back parts, respectively.

The utility model discloses a silica gel tooth appliance, including occlusion, labial and buccal stop and tongue stop, the whole occlusion is U shape setting, including corresponding first occlusion of anterior tooth area tooth setting, corresponding second occlusion of premolar setting and corresponding third occlusion of first molar setting, the left and right sides of first occlusion are connected second occlusion and third occlusion in proper order respectively, and first occlusion and second occlusion and third occlusion all include corresponding maxillary bearing surface of maxillary tooth and corresponding mandibular bearing surface of mandibular tooth respectively, when wearing, the maxillary bearing surface of first occlusion exerts a pressure on the tooth to be pressed down, and the mandibular bearing surface of first occlusion and mandibular anterior tooth area tooth form elongation space, the maxillary bearing surface and mandibular bearing surface of second occlusion contact with maxillary premolar and mandibular premolar respectively, and the maxillary bearing surface of third occlusion and maxillary first molar form eruption space.

An intra-oral appliance to power and / or communicate with a neurostimulator is provided. The intra-oral appliance can include a teeth covering configured to fit over mandibular incisor, canine and / or premolar teeth of a human being and a remote controller in the form of a housing extending posteriorly from and operably connected to the teeth covering. The housing can include a power source, a coupling coil configured to transmit power to the neurostimulator and configured to receive power from an external charger, and electrical circuitry operably connected to the coupling coil and the power source.

The application relates to the technical field of digital oral cavity, and relates to an automatic determination method of tooth feature points, which comprises a data preprocessing stage, in the XOY plane of a global coordinate system, a projection point of a target tooth mass center coordinate, a projection point of a left adjacent tooth mass center coordinate and a projection point of a right adjacent tooth mass center coordinate form a triangle, a center and a radius of a circumscribed circle of the triangle are obtained, a local coordinate system is established, feature points of the target tooth are determined, the tooth is divided into canines, incisors and molars, and the molars are divided into premolars and molars; and a protrusion point of a mesial and distal surface of the target tooth is determined. The application can be realized through a computer program, and then the feature points of each tooth can be automatically obtained after the tooth model is imported into the computer.

The utility model discloses an early correction bracket buccal tube set, which comprises four buccal tubes and twelve brackets, wherein the four buccal tubes are used for pasting and correcting six-year teeth; the twelve brackets are used for pasting and correcting central incisor teeth, lateral incisor teeth and premolar teeth; according to the utility model, the sizes and angles of the buccal tube and the bracket are improved, so that the bracket is more suitable for early correction of children, and the early correction efficiency is improved.

An orthodontic appliance that causes the maxillary anterior teeth to protrude forward in order to balance the face comprises a first appliance (1) and a second appliance (2). The first appliance (1) comprises an upper plate (5) positioned on the back of the six maxillary anterior teeth and fixed to the maxillary anterior teeth with orthodontic adhesive, and a first hook (3) and a second hook (4) attached to the upper plate (5) of the first appliance (1). The second appliance (2) comprises a right plate (6) and a left plate (7) positioned on both sides of the palate and covering all the molars, a first wire (8) attached to the right plate (6) and the left plate (7), and a second wire (9) made of stainless steel spring hard wire, which has a left U-shaped loop (12) and a right U-shaped loop (13) positioned on the premolars, and both ends of the wire are attached to the right plate (6) and the left plate (7).

A personalized healing abutment maker comprises a maker body, the maker body is provided with four groove groups, the shapes of the four groove groups are respectively matched with gum-penetrating contours of four tooth positions of an upper jaw molar, a lower jaw molar, a premolar and an anterior tooth, each groove group at least comprises one groove, and the bottom of each groove is provided with a through hole communicated with the bottom of the maker body. According to the utility model, a plurality of groove groups are arranged, and the proper healing abutment can be formed by pouring glue into the corresponding grooves according to the tooth position of the patient without teeth, so that the adaptation degree of the manufactured healing abutment and the tooth position of the patient without teeth is improved; the problems of unsmooth transition between the abutment and the prosthesis, easy formation of a black triangle, poor abutment stress and the like during later prosthesis making are solved, the physiological and aesthetic requirements of the dental crown are met, the operation is simple and convenient, the dental crown is in place once, a patient does not need to see a doctor for many times, and the time of the patient is saved.