45 results about "Orthodontic technology" patented technology

The invention relates to a correction method for preventing excessive stress concentration of teeth roots and jaws in the process of orthodontic treatment, belonging to the technical field of orthodontics of teeth. The correction method comprises the following steps of: establishing an automatic-matching 3D (three dimensional) integrated tooth-jaw model; carrying out stepwise virtual correction on the 3D integrated tooth-jaw model; applying 3D finite-element analysis to determine the dynamic change of stress distribution of the teeth roots and the jaws in the whole process of the virtual correction and guarantee that the stress of the teeth roots and the jaws in correction is in the safety range; and manufacturing a clinical correction device by a fast laser forming technology. By the individualized correction device designed and manufactured by a computer in an auxiliary manner, the positions and the routes of movement of the teeth roots can be controlled. By expression and verification, the correction method can duplicate the condition of virtual correction in actual treatment, realizes good position relation among the teeth roots, the teeth and the jaws in the correction process, and is beneficial to reducing and eliminating absorption of the teeth roots and the alveolar bones due to excessive stress concentration in the process of orthodontic treatment and reducing and avoiding recurrence after correction.

The invention relates to the dental orthodontic technical field and relates to a spatial trajectory precise positioning method applied to the cutting of a braceless invisible orthodontic appliance by a mechanical arm. The method includes the following steps that: (1) the virtual gingival lines of a dental digital model are obtained, and the virtual gingival lines are numbered and are transmitted to a server; (2) a two-dimensional code block for recording a dental model serial number is arranged on the dental model, the spatial position of the two-dimensional code block and the spatial position relationship of the two-dimensional code block and tooth edge lines are recorded and are uploaded to the server; (3) the two-dimensional code block is scanned, so that the serial number of the dental model is obtained, the virtual gingival lines of the dental model corresponding to the serial number, the spatial position of the two-dimensional code block and the spatial position relationship of the two-dimensional code block and the tooth edge lines are downloaded; and (4) the two-dimensional code block of the dental model is adjusted to the spatial position of the downloaded two-dimensional code block, and the orthodontic appliance is cut off from a hot-press diaphragm according to the virtual gingival lines. With the method of the invention adopted, the problem that actual spatial positions cannot be completely overlapped with digital cutting trajectories can be solved, and the mechanical automated production of the braceless invisible orthodontic appliance can be greatly promoted.

The invention relates to the technical field of orthodontics, and discloses an orthodontics treatment device. The device comprises a lingual-side cast web plate wore on maxillary incisors, a plane guide plate arranged on the surface of the cast web plate, and combination cast crowns connected to two ends of the cast web plate, wherein each combination cast crown contains maxillary ipsilateral cuspid teeth and a first front premolar. A buccal-side hook connection bar and a lingual-side (occlusal) rest connecting rod extend out of each combination cast crown. The hook connection bar is connected to a lowering hook, which is arranged in the buccal-side center of to-be-lowered maxillary molars. The (occlusal) rest connecting rod is connected to an (occlusal) rest, which is arranged on rear molars of the to-be-lowered maxillary molars. Through the orthodontics treatment device, occlusion can be opened and elongated maxillary incisors are lowered at the same time, and the problem of multiple staggered occlusion is solved. The device is beneficial for saving curative time and cost and relieving wound suffered by patients during a therapeutic process.

The present invention relates to oral orthodontic technology, and is especially one kind of guide rod type orthodontic appliance for upper jaw embedded canine teeth. The orthodontic appliance includes a plastic palatal arch support, a fixing block, a guide rod, and an extraction device. The present invention aims at providing one kind of guide rod type orthodontic appliance for upper jaw embedded canine teeth with 3D adjustable orthodontic force, no use of dentition as anchorage and less irritation on upper lip mucous membrane. The present invention has the advantages of small orthodontic force, less blocking interference of adjacent teeth, reduced teeth moving resistance, less irritation on mucous membrane, etc.

The invention relates to a tooth movement evaluation method under a curve natural coordinate system based on an alveolar bone form and belongs to the technical field of dental orthodontics. An alveolar arch curve is constructed based on the alveolar bone form, the curve natural coordinate system is constructed based on the alveolar arch curve and the alveolar bone form, and then, the coordinates, the amount of movement, and the direction of movement of a tooth are calculated on the basis of the curve natural coordinate system. The invention provides the evaluation method of the movement of the tooth relative to the alveolar bone and having a physiological significance, and the evaluation method is beneficial to more scientific, more reasonable and more accurate tooth movement scheme design and curative effect evaluation.

An orthodontic wire bender robot to be used in the manufacture of orthodontic prostheses, having a cartesian type displacement frame that allows moving the bending head of the equipment along the X, Y and Z-axes, in order to enable the robot to execute bends by torque, performing horizontal, vertical and sagittal compensations so that the shaped orthodontic wire presents an incline on its faces at certain angle and segment in order to execute frontal rotation stresses.

The invention belongs to the technical field of tooth orthodontics and in particular relates to a double-wire straight wire arch correction device and a tooth correcting method. The device consists of a bottom plate and a double-wire arch supporting groove which is fixedly connected to the bottom plate, wherein a main groove and an auxiliary groove which are parallel to each other are formed on the double-wire arch supporting groove; the main groove is positioned on a combined side of the teeth and is a square groove; and the auxiliary groove is positioned on the root side of the teeth and has the same width and depth as those of the main groove, and the bottom of the auxiliary groove is arc-shaped. The tooth correcting method comprises the following steps of: aligning and leveling the teeth in the main groove by using a titanium-nickel round wire at the initial stage of the correction; using a stainless steel round wire in the main groove after the teeth are aligned in the main groove, controlling the root of the teeth in the auxiliary groove by using the titanium-nickel round wire, namely aligning the root of the teeth; and closing the gap by independently using a stainless steel square wire in the main groove after the root of the teeth is controlled. The root control correction force can be obviously reduced, the risk of absorbing the root of the teeth in the correcting process is reduced, the process of bending the clinical arch wire can be simplified, the treatment defect brought by error of the bent arch wire is overcome, and the double-wire straight wire arch correction device and the tooth correcting method can be applied to tooth extraction cases.

The invention relates to the technical field of digital orthodontics, in particular to a tooth and gingiva modeling method suitable for digital orthodontics application. The method comprises the following steps of: A, establishing a tooth local coordinate system by using a segmented dental crown curved surface; B, determining a tooth root section profile through a coordinate system tooth root coordinate axis; C, performing two-dimensional triangulation on the bottom surface of a tooth root, and adding position constraints and tangential constraints to perform convex shape control; D, generating tooth side grids by adopting a clustering method based on plane approximation and two-dimensional triangularization; E, optimizing side grids by adopting a Hermite curved surface interpolation algorithm; and F, performing shape fusion on the dental crown, the bottom surface and the side surfaces to enable the teeth to form a closed and complete triangular mesh model. The three-dimensional model can be obtained only through a scanner, teeth and gingiva are accurately reconstructed, a complete and closed triangular network model is formed, and the three-dimensional model can be used for orthodontic digital applications such as tooth arrangement design, orthodontic animation demonstration and 3D printing.

The invention discloses an invisible orthodontic technology based on scheme self-adaptation. The technology comprises the following steps: acquiring a first tooth model of current teeth of a patient;matching the first tooth model with a target preset tooth model in a pre-established initial correction design scheme so as to obtain a matching error result, wherein the initial correction design scheme is established according to an initial tooth model which is acquired in advance and corresponds to the patient; and adjusting the initial correction design scheme according to the matching error result so as to obtain an auxiliary correction design scheme corresponding to the initial correction design scheme and further facilitate the patient to perform matching between the current tooth, which is subjected to correction according to the auxiliary correction design scheme, and the target preset tooth model. The invisible orthodontic technology disclosed by the invention is beneficial to reduction of work load of a doctor, shortening of a treatment cycle of the patient, lowering of the treatment cost and reduction of the pain of the patient. The invention further provides an invisible orthodontic device and system based on scheme self-adaptation, as well as a computer readable storage medium, which have the same beneficial effects as those of the invisible orthodontic technology.

The invention relates to the field of orthodontic technology, and discloses a self-ligating bracket. The self-ligating bracket comprises a bracket body and a bracket cover, and a depressed arch wire slot which is formed on the upper surface of the bracket body for penetrating the bracket body. One side of the bracket cover is connected to the bracket body by a rotating shaft and is covered on the arch wire slot, and the other side of the bracket cover which is opposite to the rotating shaft is connected to the bracket body by a spacing lock for locking; wherein the spacing lock comprises a lock bolt, a lock slot which is matched with the lock bolt, and a locking mechanism which enables the lock bolt to get in and out of the lock slot. Compared with the prior art, a turning cover type locking mode of the bracket is used, so that the bracket is advantageous in that clinic operation is more convenient, patients are more comfortable, torque control is additionally enhanced, etc. The turning cover type self-ligating bracket has the possibility of mass production due to the simple structure.

The invention provides a movable correction appliance for integral mesial moving of a molar tooth, and belongs to the technical field of dental orthodontics. The movable correction appliance comprises a position fixing and connecting device, molar tooth band, an elastic rubber ring and a stopping board, wherein the position fixing and connecting device is manufactured by an orthodontic pressed film retainer high polymer material, traction hooks are welded to the molar tooth band and the elastic rubber ring, and the stopping board is arranged at the position of a missed tooth; and the stopping board at the position of the missed tooth is utilized to change the rotary center of the to-be-moved molar tooth, and the elastic rubber ring is utilized to enable the to-be-moved molar tooth (comprising a tooth root and a dental crown) to move to the mesiocclusion gradually one after another till the molar tooth is integrally moved to a destination position. The movable device is simple in operation, attractive in appearance and comfortable, can provide strong and forceful orthodontic anchorage, and thus the molar tooth is ensured to move integrally and efficiently.

The invention relates to an orthodontic technology, in particular to an OLED tooth socket for orthodontics, which comprises an orthodontic tooth socket, the orthodontic tooth socket is composed of an upper tooth socket structure and a lower tooth socket structure, the upper tooth socket structure is internally provided with a light-emitting structure capable of enabling teeth to emit light, and a functional structure is connected between the upper tooth socket structure and the lower tooth socket structure; the upper tooth socket structure and the lower tooth socket structure are internally provided with auxiliary structures capable of helping to correct teeth, the outer side of the orthodontic tooth socket is provided with a protection structure capable of protecting the orthodontic tooth socket, and the protection structure is internally provided with a damping structure with a buffering function. The orthodontic tooth socket can illuminate and make people look cool; the teeth can be corrected; the on / off of an LED thin screen can be controlled, and the LED thin screen can be turned off when light emitting is not wanted; the tooth correction can be accelerated through vibration, the teeth are accelerated to become complete, and the teeth at the lower part in the oral cavity of people can be completely surrounded through the lower tooth socket structure, so that the teeth are corrected.

The invention relates to the technical field of dental orthodontics, and particularly relates to a method and device for correcting invisible photosensitive resin brackets. The method for correcting invisible photosensitive resin brackets comprises: step 100, determining fixing positions of an arch wire and a plurality of brackets on a tooth set; step 200, placing an embedded wire at the fixing position of the arch wire; step 300, curing photosensitive resin at the fixing position of each bracket to form a bracket, and fixing the embedded wire onto the tooth set; step 400, taking the embedded wire out and forming an arch wire groove in each bracket; and step 500, the arch wire penetrating through each arch wire groove in sequence, and the arch wire applying acting force to each bracket to correct the tooth set. The device for correcting invisible photosensitive resin brackets is applicable to the method. The aim of the invention is to provide a method and a device for correcting invisible photosensitive resin brackets, for solving the technical problems of poor attractiveness and poor cleanliness of stainless steel brackets in the prior art.

The present invention relates to oral orthodontic technology, and is especially one kind of guide rod type orthodontic appliance for upper jaw embedded canine teeth. The orthodontic appliance includesa plastic palatal arch support, a fixing block, a guide rod, and an extraction device. The present invention aims at providing one kind of guide rod type orthodontic appliance for upper jaw embeddedcanine teeth with 3D adjustable orthodontic force, no use of dentition as anchorage and less irritation on upper lip mucous membrane. The present invention has the advantages of small orthodontic force,less blocking interference of adjacent teeth, reduced teeth moving resistance, less irritation on mucous membrane, etc.

The invention provides an orthodontic wire application simulation device, and relates to the technical field of orthodontics. The orthodontic wire application simulation device comprises a first pressing plate, a second pressing plate, a locking structure and an ejection screw, a screw hole is formed in the first pressing plate, and the screw hole penetrates through the first pressing plate. An avoiding hole is formed in the second pressing plate and can communicate with the screw hole in the state that the first pressing plate and the second pressing plate are overlapped. And the locking structure is used for locking the first pressing plate and the second pressing plate in an overlapped state. The ejection screws are matched with the screw holes and used for penetrating from one side of the first pressing plate to the other side of the first pressing plate. When the orthodontic wire is subjected to a simulation test, the orthodontic wire is clamped through the first pressing plate and the second pressing plate, the orthodontic wire passes through the avoiding hole, then the ejection screw penetrates through the screw hole and abuts against the orthodontic wire, and the deformation of the orthodontic wire is controlled through the screwing depth of the ejection screw. Therefore, through the orthodontic wire application simulation device, the deformation state of the orthodontic wire in clinical application can be conveniently simulated, and the orthodontic wire application simulation device is simple and stable in structure and easy to operate.

The invention provides a bracket-free invisible orthodontic appliance produced based on a tooth multi-position overlapping model and a manufacturing method of the bracket-free invisible orthodontic appliance, and belongs to the field of invisible orthodontic appliances in an orthodontic technology. The orthodontic appliance comprises a dental cast and a tooth socket which covers the surface of the dental cast and is matched with the dental cast. After a digital tooth jaw model of a patient is obtained, one or more teeth are allowed to overlap in a plurality of design positions; an overlapping body is obtained through model Boolean operation; and the tooth socket is directly printed on the overlapping body tooth model or is obtained through indirect hot-pressing mold forming. Compared with a traditional invisible orthodontic appliance, the invisible orthodontic appliance of the invention has the following advantages that: the tooth socket has certain gaps on certain tooth surfaces, buccal lingual surfaces or mesiodistal middle surfaces, the tooth socket has more changeable shapes, and navigation of tooth movement or effective anchorage management by adjusting the orthodontic force is facilitated, so that the orthodontic efficiency of the invisible tooth socket is improved; and tooth eruption can be guided, the inter-jaw relationship is adjusted through locking of the teeth, and a certain growth improvement effect is achieved.

The invention belongs to the field of medical instruments, and relates to a three-groove variable-crown-angle straight wire arch bracket which comprises a bracket body, an incisal end bracket wing and a gingival end bracket wing are arranged on the bracket body, a horizontal groove is formed in the bracket body, an incisal end groove and a gingival end groove are formed below the incisal end bracket wing and the gingival end bracket wing respectively, and the horizontal groove is communicated with the incisal end groove and the gingival end groove. Crown angles and torque angles of the incisal end groove and the gingival end groove are the same as those of the horizontal grooves. By adopting the concept of three grooves and combining with the design of the arc-shaped groove side wall, the contact between the orthodontic arch wire and the bracket side wall is changed from linear contact to point contact, so that the friction force between the orthodontic arch wire and the bracket side wall is reduced, the common problem that the backward moving resistance of teeth is large in the existing straight wire bracket is solved, the mode of the traditional straight wire orthodontic technology is changed, and the orthodontic effect of the orthodontic arch bracket is improved. Correcting control is more accurate, moving resistance is small, moving speed is high, and the correcting treatment course is effectively shortened.

The invention discloses a positioning unit, a positioner and a positioning method of an orthodontic bracket. The positioning unit of an orthodontic bracket comprises bracket positioning blocks and occlusion positioning blocks, which are in detachable connection, wherein each occlusion positioning block is used for coupling with the occlusal surface of a tooth; each bracket positioning block is used for coupling with an orthodontic bracket and releasing the orthodontic bracket onto teeth; and an arch wire channel is formed in each bracket positioning block in the mesiodistal direction, and is used for leading an arch wire which is arranged in an arch wire slot of the orthodontic bracket to pass through. According to the positioning unit and the positioner, the arch wire channel is providedto prevent the arch wire slot from being occupied and can be coupled with the orthodontic bracket carrying an arch wire, and the arch wire is taken along during indirect bonding, so that the operationtime and operation steps can be reduced, pain of a patient can be relieved, the workload of a doctor can be reduced, and the development of the orthodontic technology can be greatly promoted.

The invention belongs to the technical field of tooth orthodontics and in particular relates to a double-wire straight wire arch correction device and a tooth correcting method. The device consists of a bottom plate and a double-wire arch supporting groove which is fixedly connected to the bottom plate, wherein a main groove and an auxiliary groove which are parallel to each other are formed on the double-wire arch supporting groove; the main groove is positioned on a combined side of the teeth and is a square groove; and the auxiliary groove is positioned on the root side of the teeth and has the same width and depth as those of the main groove, and the bottom of the auxiliary groove is arc-shaped. The tooth correcting method comprises the following steps of: aligning and leveling the teeth in the main groove by using a titanium-nickel round wire at the initial stage of the correction; using a stainless steel round wire in the main groove after the teeth are aligned in the main groove, controlling the root of the teeth in the auxiliary groove by using the titanium-nickel round wire, namely aligning the root of the teeth; and closing the gap by independently using a stainless steel square wire in the main groove after the root of the teeth is controlled. The root control correction force can be obviously reduced, the risk of absorbing the root of the teeth in the correcting process is reduced, the process of bending the clinical arch wire can be simplified, the treatment defect brought by error of the bent arch wire is overcome, and the double-wire straight wire arch correction device and the tooth correcting method can be applied to tooth extraction cases.

The invention relates to an orthodontic technology for correcting malposed tooth deformity. The orthodontic technology comprises three stages of operation steps, wherein the first stage is an occlusion opening stage, and is used for a patient who deeply covers and occludes upper and lower teeth and does not completely leak lower anterior teeth; the second stage is a gap closing stage, and is used for a patient who closes a gap during tooth extraction; the third stage is a fine adjustment stage, and is used for adjusting the occlusion tightness of upper and lower jaws in the later period. In order to overcome the defects in the prior art, a thermal activation arch wire has the advantages that the gap can be closed while the arch wire is aligned, and a special thermal activation rocking chair arch wire is required to be matched during gap closing, so that the normal inclination of anterior teeth can be effectively controlled and maintained when the tooth extraction gap is closed by the arch wire in the mode; due to the thermal activation performance, the gap can be closed while the arch wire is aligned, so that the treatment period is greatly shortened.

The invention provides an automatic dental digital model segmentation method, which belongs to the technical field of dental orthodontics and comprises the following steps: acquiring a dental digital model of a patient; simplifying the dental digital model; performing coordinate system standardization and feature extraction on the dental digital model; the dental digital model is input into a deep learning model for tooth segmentation, the deep learning model needs two steps of use operation, the first step is a training process of the deep learning model, and the first step mainly comprises the following steps: firstly, simplifying the acquired dental digital model of a patient, and removing meaningless redundant triangular patches; secondly, coordinate system standardization and feature extraction are carried out on the dental digital model, and extracted feature information serves as an information source of a deep learning model and is a main basis for segmentation; then, the extracted feature information is input into a deep learning model for training, so that the deep learning model automatically learns proper hyper-parameters, and a deep learning model capable of realizing tooth segmentation is formed; and finally, simplifying the dental digital model, standardizing the coordinate system of the dental digital model, extracting features, and recording the structure and hyper-parameters of the deep learning model capable of realizing tooth segmentation. By means of the method, the dental digital model can be automatically and efficiently segmented, and a basis is provided for the steps of tooth orthodontic diagnosis, virtual tooth arrangement and the like in the later period.

The invention discloses an active and passive integrated self-ligating bracket, and relates to the technical field of dental orthodontics, the active and passive integrated self-ligating bracket comprises a main body, the lower end of the main body is provided with a base plate, the upper end of the main body is provided with a bracket body, one side of the bracket body is provided with a locking device, and one side of the main body is provided with an auxiliary device; an elastic assembly is arranged on one side of the auxiliary device. Under the combined action of the arch wire groove, the side plate, the clamping mechanism and the reed, the bracket can be prevented from being pulled off from teeth due to excessive dental calculus in the teeth, the bracket can be clamped on the teeth, and under the combined action of the base, the elastic locking plate, the upper elastic cushion, the separation blade and the lower elastic cushion, the elasticity and the toughness of the bracket can be improved, so that the safety of the bracket is improved. According to the dental calculus bracket, the bracket cannot be damaged due to the effect of dental calculus, the locking capacity of the bracket can be improved under the combined action of a locking plate, a viscous adhesive tape, a mounting plate, an anti-corrosion coating and a micro screw, and the bracket can be stably connected with teeth.

The invention discloses an accessory, and belongs to the technical field of orthodontics. The accessory is used for adhering to the surface of a tooth, and is matched with transparent orthodontic apparatus installed on the tooth, the transparent orthodontic apparatus is used to accommodate the accessory and apply an acting force to the accessory, the accessory comprises a connecting surface and four recessed portions, wherein the connecting surface is arranged at one end of the accessory, the connecting surface adheres to the tooth, the four recessed portions are arranged on the peripheral surface of the accessory at intervals, the acting force is decomposed on the recessed portions, component forces on the recessed portions act on the tooth, and thereby each recessed portion can make thetooth move in three-dimensional directions. According to the accessory of the invention, the force of the transparent orthodontic apparatus acting on the accessory is decomposed through the four recessed portions, the recessed portions can make the tooth move in three-dimensional directions, the applicability to different deformed teeth is improved, and the correction effect is improved. At the same time, the component forces on the recessed portions act on the tooth, the force couple is reduced, the tilt movement of the tooth is reduced, and the correction effect is further improved.

The invention relates to the technical field of oral maxillofacial surgery and orthodontics, and provides a dental bone mixed supporting type external intraoral distraction osteogenesis device and a using method. The dental bone mixed supporting type external intraoral distraction osteogenesis device comprises a retention nail, a traction nail and a traction piece, the retention nail is used for being fixed to the upper end of bone cortex, the traction nail is used for being fixed to a dental surface to be adjusted, the retention nail and the traction nail are connected through the traction piece, and the traction piece is used for providing elastic force for the retention nail to be away from the traction nail. By means of the technical scheme of the dental bone mixed supporting type external intraoral distraction osteogenesis device, the problem that in the prior art, distraction osteogenesis is difficult to operate is solved.

The present invention relates to the technical field of digital orthodontics, in particular to a tooth modeling method suitable for digital orthodontics with gingiva, which adopts the following steps: A. Using the segmented crown surface to establish a tooth local coordinate system; B. Through the root coordinate axis of the coordinate system, determine the cross-sectional profile of the tooth root; C. Carry out two-dimensional triangulation on the bottom surface of the tooth root, and add position constraints and tangential constraints to control the convex shape; D. Use the clustering method based on plane approximation and two Three-dimensional triangulation to generate the tooth side mesh; E. Use the Hermite surface interpolation algorithm to optimize the side mesh; F. Fusion the shape of the crown, bottom surface, and side surface to make the tooth a closed and complete triangular mesh model; it can only rely on The 3D model obtained by the scanner accurately reconstructs the teeth and gums to form a complete closed triangular network model, which can be used for orthodontic digital applications such as tooth arrangement design, orthodontic animation demonstration and 3D printing.

The invention belongs to the technical field of digital orthodontics in the field of digital medical treatment, and in particular relates to a method for detecting the state of orthodontic treatment of teeth in the course of orthodontic treatment. The invention utilizes the photographed teeth of the patient, and based on the computer two-dimensional image processing technology and the computer three-dimensional modeling technology, to detect the patient's tooth correction state at low cost. The invention makes it possible for the patient to detect the state of orthodontic treatment at home, without the need for the patient to go to the hospital for oral scanning or tooth bite, which greatly reduces the cost of the patient and the hospital. At the same time, the solution of the present invention directly uses the patient's tooth model before orthodontic treatment to detect the patient's orthodontic status, so the patient's previous digital orthodontic solution can be directly reused, greatly reducing the cost of orthodontics.

The invention discloses a children interdental space retainer and belongs to the technical field of orthodontics. One end of the outer shell is in interference clamping connection with the preformed crown, a supporting spring, a telescopic rod and a connecting plate are arranged in the outer shell, one end of the telescopic rod is connected with the inner bottom face of the outer shell, the other end of the telescopic rod is connected with the connecting plate, and the outer side of the telescopic rod is sleeved with the supporting spring. The two ends of the supporting spring abut against the inner bottom face of the outer shell and the connecting plate respectively, the connecting plate is connected with one end of a screw rod, the outer side of the screw rod is in threaded connection with a nut, the other end of the screw rod is connected with a baffle, and the end face of the nut is rotationally connected with the outer end face of the outer shell through a bearing. The use length of the supporting spring is changed through driving of the screw, then the use length of the gap retainer can be changed along with jaw growth, the problem that in clinic, a child needs to see a doctor continuously and a new gap retainer needs to be manufactured due to growth and development is solved, the doctor seeing cost of a patient is reduced, and the chair-side operation time of the patient is shortened.

The invention particularly relates to a preparation method of a lingual orthodontic device for tooth correction, and solves the problems that an existing lingual orthodontic technology is difficult toinstall in application, and orthodontic wire correction force cannot be kept consistent all the time. The preparation method of the lingual orthodontic device for tooth correction comprises the following steps of S1, establishing a digital tooth model; S2, determining the shape of each bottom plate; S3, determining the shape of an orthodontic band-shaped body; S4, preparing the orthodontic band-shaped body; S5, preparing the bottom plates; and S6, assembling the orthodontic band-shaped body and the bottom plates. According to the method, the purposes of easy installation and light correctionare realized, the pain in the tooth correction process is effectively reduced, the tooth movement efficiency is improved, the operation amount of doctors is reduced, meanwhile, the wearing comfort ofpatients is improved, the lingual orthodontic technical level is effectively improved, and the method has positive popularization significance.

The invention relates to the technical field of orthodontics, and discloses an arch wire bending method. The arch wire bending method comprises the following steps: step 1: introducing a design outline drawing or design curve data of an arch wire into a cutting machine, and using the cutting machine to cut a groove on a thin plate according to the design outline drawing or the design curve data, specifically, the shape of the groove is consistent with the designed shape of the arch wire; step 2: clamping the arch wire to be bent into the groove; step 3: pressing at least one first pressing plate to be above the thin plate; step 4: placing the first pressing plate and the thin plate in a heating device for heating and heat preservation, and after the arch wire is formed, taking the first pressing plate and the thin plate out of the heating device; and step 5: removing the first pressing plate from the thin plate, taking the arch wire out of the groove, and performing the surface treatment on the arch wire. The arch wire bending method has the advantages of simple operation, high bending precision and low cost.