阅读说明：本技术 基于螺旋ct三维重建技术的口腔正畸装置及其方法 (Orthodontic device based on spiral CT three-dimensional reconstruction technology and method thereof ) 是由 代巧荣 于 2020-06-28 设计创作，主要内容包括：本发明涉及一种基于螺旋CT三维重建技术的口腔正畸装置及其方法,属于口腔正畸领域,其包括弓丝和若干托槽,还包括牙齿假模,牙齿假模的各个齿面上固定连接有若干连接块,连接块上分别可拆卸连接有定位块,各个定位块上共同连接有定位带,若干托槽位于定位块的顶侧或底侧且分别与定位块可拆卸连接,弓丝穿设在各个托槽上。本发明具有通过在牙齿假模上对矫治器进行预安装和调试,减少了向患者口腔内安装矫治器时口腔内操作时间,减轻了患者的不适感,同时通过预安装成整体的矫治器,减少了单个托槽发生偏斜影响矫正质量的情况的效果。(The invention relates to an orthodontic device based on a spiral CT three-dimensional reconstruction technology and a method thereof, belonging to the field of orthodontic, wherein the orthodontic device comprises an arch wire, a plurality of support grooves and a tooth dummy, wherein each tooth surface of the tooth dummy is fixedly connected with a plurality of connecting blocks, the connecting blocks are respectively detachably connected with positioning blocks, each positioning block is jointly connected with a positioning belt, a plurality of support grooves are positioned at the top side or the bottom side of the positioning block and are respectively detachably connected with the positioning block, and the arch wire is arranged on each support groove in a penetrating way. The invention has the advantages that the dental prosthesis is pre-installed and debugged, so that the operation time in the oral cavity when the dental prosthesis is installed in the oral cavity of a patient is reduced, the discomfort of the patient is relieved, and meanwhile, the condition that the correction quality is influenced by the deflection of a single bracket is reduced by pre-installing the dental prosthesis into the integral dental prosthesis.)

1. The utility model provides an orthodontic device based on spiral CT three-dimensional reconstruction technique, includes arch wire (2) and a plurality of support groove (1), its characterized in that: the tooth artificial model is characterized by further comprising a tooth artificial model (3), a plurality of connecting blocks (31) are fixedly connected to each tooth surface of the tooth artificial model (3), the connecting blocks (31) are respectively detachably connected with positioning blocks (4), each positioning block (4) is jointly connected with a positioning belt (41), a plurality of support grooves (1) are located on the top side or the bottom side of each positioning block (4) and are respectively detachably connected with the positioning blocks (4), and arch wires (2) penetrate through the support grooves (1).

2. The orthodontic appliance based on the spiral CT three-dimensional reconstruction technique of claim 1, wherein: the connecting block (31) and the positioning block (4) are opposite in side, a first inserting block and a first slot (311) are respectively formed in the side, and the first inserting block and the first slot (311) are in tight fit.

3. The orthodontic appliance based on the spiral CT three-dimensional reconstruction technique of claim 2, wherein: and a belt groove for the positioning belt (41) to pass through is formed in the positioning block (4).

4. The orthodontic appliance based on the spiral CT three-dimensional reconstruction technique of claim 3, wherein: the positioning belt (41) is made of low-temperature thermoplastic high polymer materials.

5. The orthodontic appliance based on the spiral CT three-dimensional reconstruction technique of claim 4, wherein: the dental prosthesis is characterized in that tensioning clamping blocks (32) are arranged on two sides of the dental prosthesis (3), a tensioning bolt (321) is connected to each tensioning clamping block (32) in a threaded mode, and a tensioning clamping plate (322) is fixedly arranged on each tensioning bolt (321).

6. The orthodontic appliance based on the spiral CT three-dimensional reconstruction technique of claim 1, wherein: the side walls of the bracket (1) opposite to the positioning block (4) are respectively provided with a second slot (11) and a second insert block which are tightly matched with each other, wherein the second slot (11) is arranged on the bracket (1).

7. The orthodontic appliance based on the spiral CT three-dimensional reconstruction technique of claim 6, wherein: the tooth artificial model is characterized in that a pressing groove (12) is formed in the side wall, away from the tooth artificial model (3), of one side of the second slot (11), the pressing groove (12) extends to the surface of the bracket (1), an elastic pressing piece (121) is fixedly connected to the side wall of the pressing groove (12), one side, facing the second inserting block, of the elastic pressing piece (121) is fixedly provided with a pressing convex rib (1211) and is pressed towards the second inserting block, and a ridge groove (441) is formed in the position, matched with the pressing convex rib (1211), of the second inserting block.

8. The orthodontic appliance based on the spiral CT three-dimensional reconstruction technique of claim 7, wherein: the tooth artificial model is characterized in that elastic swing rods (13) are arranged on two sides of a second slot (11) on the side wall, far away from the tooth artificial model (3), of the support groove (1), one end of each elastic swing rod (13) is fixedly connected with the side wall of the support groove (1), a clamping piece (131) is fixedly arranged at one side, facing the second slot (11), of the other end of each elastic swing rod (13), each clamping piece (131) extends towards the corresponding compression groove (12), each clamping piece (131) bends towards the corresponding compression groove (12) and then bends towards the corresponding elastic pressing piece (121) again, and finally extends to one side, facing the second insertion block, of each elastic pressing piece (121), a jacking bulge (1311) is fixedly arranged on each clamping piece (131), and each jacking bulge (1311) is located between each clamping piece (131) and each spring.

9. The orthodontic appliance based on the spiral CT three-dimensional reconstruction technique of claim 1, wherein: one side of the bracket (1) facing the tooth artificial model (3) is pasted with a protective paster.

10. An orthodontic method based on a spiral CT three-dimensional reconstruction technology, comprising the orthodontic device based on the spiral CT three-dimensional reconstruction technology of any one of claims 1 to 9, characterized by comprising the following steps:

a1, carrying out spiral CT scanning on the oral cavity of a patient, and carrying out three-dimensional modeling according to volume data obtained by scanning;

a2, repairing the defects of the three-dimensional model, and reducing the defects of a cavity, a section and a ghost in the three-dimensional model;

a3, engraving and processing a tooth dummy (3) by a numerical control engraving machine;

a4, fixedly installing connecting blocks (31) on the tooth surface of a tooth artificial model (3), connecting positioning blocks (4) on the connecting blocks (31), and installing and connecting each bracket (1) and the positioning blocks (4);

a5, soaking and softening a positioning belt (41) made of a low-temperature thermoplastic high polymer material in hot water, penetrating through each positioning block (4), and tensioning the positioning belt (41) until the positioning belt (41) is solidified again;

a6, threading an arch wire (2) on each bracket (1);

a7, connecting each positioning block (4) with a bracket (1) and taking the bracket (1) off from a dental dummy (3), tearing off the protective sticker on each bracket (1), and smearing dental adhesive on one surface of the bracket (1) facing to the tooth;

a8, adhering the brackets (1) together into the oral cavity of a patient, separating all the positioning blocks (4) from the brackets (1) after the brackets (1) are adhered firmly, and taking out the whole body consisting of the positioning blocks (4) and the positioning belts (41) from the oral cavity of the patient to finish the installation of the appliance.

Technical Field

The invention relates to the technical field of orthodontic, in particular to an orthodontic device based on a spiral CT three-dimensional reconstruction technology and a method thereof.

Background

The spiral CT scanning enables the X-ray bulb tube to perform continuous rotary scanning around a human body, meanwhile, a medical scanning detection mode that a scanning bed automatically feeds at a constant speed is adopted, information of a continuous layer is obtained, the information is also called volume data, and a three-dimensional reconstruction technology is a technology for establishing a three-dimensional data model according to the volume data obtained after the spiral CT scanning. Orthodontics is a general concept in orthodontics and refers to a general term for correction of deformities of teeth and orofacial parts. The method not only comprises the tooth correction technologies such as wearing a corrector, repairing teeth and implanting false teeth, but also comprises surgical operations such as tooth extraction and osteotomy. The steel wire correction is one of the tooth correction devices which is commonly used, namely a device made of metal or ceramic and the like and fixed on the surface of a tooth by using a special adhesive in the process of correcting the tooth is used for accommodating and fixing an orthodontic steel wire and transmitting correction force to the tooth, thereby achieving the purpose of correcting the malpositioned tooth.

When the existing steel wire orthodontic device is installed, a doctor directly bonds a bracket to a tooth, then wears an arch wire to each bracket, positions the arch wire and completes the installation of the orthodontic device.

The above prior art solutions have the following drawbacks: this kind of mode of installation, because the support groove is by doctor according to experience on bonding to the tooth one by one, the condition that the deviation appears in the support groove position of taking place individuality during the bonding easily, the doctor need prize the support groove down when the deviation appears, then will remain the glue on the tooth through the dental drill and grind and bond again, complex operation and set up time are long. Meanwhile, after the arch wire is installed, a doctor needs to adjust the arch wire in the oral cavity of a patient, so that the patient feels uncomfortable.

Disclosure of Invention

In view of the defects of the prior art, one of the objectives of the present invention is to provide an orthodontic device based on spiral CT three-dimensional reconstruction technology, which has the effects of reducing the deviation of each bracket during installation and reducing the time for operating in the oral cavity of a patient.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides an orthodontic device based on spiral CT three-dimensional reconstruction technique, includes arch wire and a plurality of support groove, still includes the tooth false mould, fixedly connected with a plurality of connecting blocks on each flank of tooth false mould, can dismantle respectively on the connecting block and be connected with the locating piece, each be connected with the location area jointly on the locating piece, a plurality of support groove is located the top side or the bottom side of locating piece and can dismantle with the locating piece respectively and be connected, the arch wire is worn to establish on each support groove.

By adopting the technical scheme, the dental prosthesis film is manufactured by modeling and processing volume data obtained by spiral CT scanning, the overall size and shape of the dental prosthesis and the teeth of the simulated patient oral cavity are highly similar, a carrier is provided for the overall shape fitting of the bracket and the dental prosthesis by fixedly arranging the connecting block on the tooth surface of the dental prosthesis and detachably connecting the positioning block and the connecting block, then the bracket is detachably connected with each positioning block, the relative position of each positioning block is fixed by using a positioning belt, when a doctor detaches the positioning block and the bracket together from the dental prosthesis, the force of the arch wire acting on the bracket is transmitted to each positioning block, the relative position of each bracket is kept unchanged by each positioning block with the relatively fixed position, then each bracket is coated with adhesive and is adhered with the oral cavity of the patient, the positioning block is separated from the bracket after the adhesive is firm, the process that the ware was rescued to patient's oral cavity installation to completion that can be quick is because each holds in the palm the groove and links into an organic whole, and the position if the deviation appears during the installation, then can cause whole obvious slope or deviation, and the visual observation of being convenient for and the adjustment of being convenient for are installed the patient oral cavity together with each support groove, have reduced the time of operating in patient oral cavity, have reduced the patient and have felt uncomfortable possibility.

The present invention in a preferred example may be further configured to: the connecting block is characterized in that one side, opposite to the positioning block, of the connecting block is provided with a first inserting block and a first slot respectively, and the first inserting block is tightly matched with the first slot.

Through adopting above-mentioned technical scheme, because first inserted block and first slot tight fit, thereby the doctor locating piece makes first inserted block and first slot insert to close to the pressure of connecting block direction during the installation to realized being connected of connecting block and compact heap, connected back doctor taps the locating piece, reduces the clearance between first inserted block and the first slot tank bottom, promotes the reliability to holding in the palm the groove location.

The present invention in a preferred example may be further configured to: and a belt groove for the positioning belt to pass through is formed in the positioning block, and the belt groove is communicated with the side wall of one side of the positioning block, which is far away from the bracket.

Through adopting above-mentioned technical scheme to make the doctor can follow the locating piece and keep away from the one side of holding in the palm the groove and be connected whole location area and each support groove, the connecting band is hard material, thereby fixes a position the relative position of each locating piece.

The present invention in a preferred example may be further configured to: the positioning belt is made of a low-temperature thermoplastic high polymer material.

By adopting the technical scheme, because the positioning belt is made of the low-temperature thermoplastic polymer material, after the positioning belt is soaked in hot water and softened, a doctor penetrates the positioning belt through the positioning blocks, and adjusts the positioning shape according to the actual distribution position of the positioning blocks, so that the re-hardened positioning belt is more suitable for the dental prosthesis in shape, and the condition that the deviation occurs in the positions of the brackets after the appliance is taken down from the dental prosthesis due to the shape deviation of the positioning belt is reduced.

The present invention in a preferred example may be further configured to: the tooth artificial model is characterized in that tensioning clamping blocks are arranged on two sides of the tooth artificial model, tensioning bolts are connected to the tensioning clamping blocks in a threaded mode, and tensioning clamping plates are fixedly arranged on the tensioning bolts.

Through adopting above-mentioned technical scheme, penetrate each locating piece at the location area and before the location area solidifies again, take both ends taut with the location, make whole location area tensioning, then press from both sides tight splint and tensioning piece through rotating the tensioning bolt, press from both sides tight location to it at the in-process of location area solidification.

The present invention in a preferred example may be further configured to: and a second slot and a second inserting block which are tightly matched with each other are respectively arranged on the side walls of the bracket opposite to the positioning block, wherein the second slot is arranged on the bracket.

Through adopting above-mentioned technical scheme, the cooperation of second slot and second inserted block has realized that the locating piece is connected with holding in the palm the groove, simultaneously because the second slot sets up on holding in the palm the groove, has reduced and has appeared unnecessary protruding fish tail patient's oral cavity or cause uncomfortable possibility on holding in the palm the groove.

The present invention in a preferred example may be further configured to: the tooth artificial model is characterized in that a pressing groove is formed in the side wall of one side, away from the tooth artificial model, of the second slot, the pressing groove extends to the surface of the support groove, an elastic pressing piece is fixedly connected to the side wall of the pressing groove, a pressing convex edge is fixedly arranged on one side, facing the second inserting block, of the elastic pressing piece and is pressed towards the second inserting block, and a ridge groove is formed in the position, matched with the pressing convex edge, of the second inserting block.

Through adopting above-mentioned technical scheme, owing to set up the elasticity preforming, when the second inserted block stretches into the second slot, the elasticity preforming compresses tightly the second inserted block, simultaneously through the edge groove with compress tightly the cooperation of bead with the second inserted block chucking to the condition of locating piece and the unexpected separation of support groove has been reduced.

The present invention in a preferred example may be further configured to: the tooth artificial model is characterized in that elastic swing rods are arranged on two sides, located in the second slot, of the side wall, away from the tooth artificial model, of the support groove, one end of each elastic swing rod is fixedly connected with the side wall of the support groove, clamping pieces are fixedly arranged at the other ends of the elastic swing rods towards one side of the second slot, extend towards the compression groove direction, are bent towards the compression groove direction and extend towards the elastic pressing piece direction again, and finally extend towards one side, facing the second insert block, of the elastic pressing piece, the jacking bulges are fixedly arranged on the clamping pieces, and the jacking bulges are located between the clamping pieces and the spring pressing piece.

Through adopting above-mentioned technical scheme, when needing to separate locating piece and support groove, the doctor passes through dental forceps from the tight two elasticity pendulum rods of both sides clamp, and the clamping piece on two elasticity pendulum rods is when to the direction motion that is close to each other, and two jacking archs move towards one side of second inserted block to the elasticity preforming to make the one side bending type of elasticity preforming to keeping away from the second slot, and make and compress tightly the separation of bead and edge groove, easily make the locating piece and the separation of fixed slot.

The present invention in a preferred example may be further configured to: and a protective sticker is pasted on one side of the bracket facing the dental artificial model.

By adopting the technical scheme, the protective paster is arranged, so that the possibility that foreign matters and dust are stained on the sticking surface of the bracket to influence the subsequent sticking quality when the relative positioning is carried out on each bracket on the dental artificial model is reduced.

The invention also aims to provide an orthodontic method based on the spiral CT three-dimensional reconstruction technology, which comprises the following steps: a1, carrying out spiral CT scanning on the oral cavity of a patient, and carrying out three-dimensional modeling according to volume data obtained by scanning;

a2, repairing the defects of the three-dimensional model, and reducing the defects of a cavity, a section and a ghost in the three-dimensional model;

a3, engraving and processing a tooth dummy by a numerical control engraving machine;

a4, fixedly installing connecting blocks on the tooth surface of the tooth artificial model, connecting positioning blocks on the connecting blocks, and installing and connecting the brackets with the positioning blocks;

a5, soaking and softening a positioning belt made of a low-temperature thermoplastic high polymer material in hot water, penetrating through each positioning block, and tensioning the positioning belt until the positioning belt is cured again;

a6, threading an arch wire on each bracket;

a7, connecting each positioning block with a bracket, taking the bracket from the dental dummy, tearing off the protective paster on each bracket, and smearing dental adhesive on one surface of each bracket facing to the tooth;

a8, bonding all the brackets together into the oral cavity of a patient, separating all the positioning blocks from the brackets after the brackets are firmly bonded, and taking out the whole body formed by the positioning blocks and the fixing belts from the oral cavity of the patient to finish the installation of the appliance.

By adopting the technical scheme, the three-dimensional model is established according to the data that the spiral CT scans and is obtained, and simulate the dental dummy of the processing department of the tooth shape of the patient through the numerical control engraving and milling, the pre-installation of the bracket and the arch wire is carried out on the dental dummy, and under the fixation of each positioning block and the positioning belt, the arch wire customized according to the oral cavity condition of the patient and the appliance formed by the bracket are transferred to the oral cavity of the patient, the installation of the appliance can be completed after the bonding is completed and the positioning block is taken down, the time for operating in the oral cavity of the patient is shortened, and the condition that the deviation of a single bracket affects the correction effect is reduced.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the appliance is pre-installed and debugged on the dental dummy, so that the operation time in the oral cavity when the appliance is installed in the oral cavity of a patient is reduced, the discomfort of the patient is relieved, and meanwhile, the situation that the correction quality is influenced by the deflection of a single bracket is reduced by pre-installing the appliance into a whole;

2. the positioning belt is made of the low-temperature thermoplastic high polymer material, so that the positioning belt is more adaptive to the actual oral condition of a patient after being solidified, and the possibility that the actual setting condition of each bracket is influenced by the shape deviation of the positioning belt is reduced.

Drawings

Fig. 1 is a schematic structural view of an orthodontic device embodying the entirety of an embodiment of the present application.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B in fig. 1.

FIG. 4 is a schematic diagram of an explosion structure for embodying the structure of each part of the connecting block, the positioning block and the bracket in the embodiment.

FIG. 5 is a schematic diagram of various structures on a bracket according to the present embodiment.

In the figure, 1, bracket; 11. a second slot; 12. a compaction groove; 121. elastic tabletting; 1211. pressing the convex ribs; 13. an elastic swing link; 131. a clip; 1311. jacking bulges; 2. an arch wire; 3. a dental prosthesis; 31. connecting blocks; 311. a first slot; 32. tensioning the clamping block; 321. tensioning the bolt; 322. tensioning the clamping plate; 4. positioning blocks; 41. a positioning belt; 42. a first insert block; 43. a belt groove is formed; 44. a second insert block; 441. a ridge groove; 5. a protective sticker.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment of the application discloses an orthodontic device based on a spiral CT three-dimensional reconstruction technology,

as shown in fig. 1, the dental prosthesis comprises an orthodontic device and a dental prosthesis 3, wherein the orthodontic device comprises an arch wire 2 and a plurality of brackets 1, the dental prosthesis 3 is manufactured according to a three-dimensional model after actual spiral CT scanning of the oral cavity of a patient, and the distribution and the form of each tooth on the dental prosthesis 3 are highly similar to those of the teeth of the patient. The tooth surface of the dental prosthesis 3 is fixedly provided with a connecting block 31, the connecting block 31 is detachably connected with positioning blocks 4, the positioning blocks 4 are connected with each other through positioning belts 41, and the shapes of the positioning belts 41 are set and adjusted according to the actual tooth distribution of the dental prosthesis 3, so that the positioning blocks 4 still keep relative positions when being connected with the connecting block 31 after being detached from the connecting block 31. Each bracket 1 is detachably connected with the lower side of the positioning block 4, and one side of the bracket 1 is abutted against the tooth surface of the tooth false membrane. The doctor sets up through the tooth distribution of tooth false mould 3 and splices a plurality of support grooves 1 and arch wire 2 in advance to through setting up locating piece 4 and location area 41 will correcting after each locating piece 4 of ware intercommunication is pulled down from tooth false mould 3, locating piece 4 and fixed band bear the orthodontic force of arch wire 2 and make each position of holding in the palm groove 1 keep static relatively, the doctor coats on the support groove 1 and will correct the ware and install in the patient oral cavity after scribbling the adhesive, compare in pasting each support groove 1 on patient's tooth one by one and wear to establish the mode of arch wire 2 at last, the time length of operation in patient's mouth has been reduced to the needs. Meanwhile, when the bracket 1 is connected with the arch wire 2 and forms a whole with relatively fixed position, when the bracket 1 inclines or deviates, the whole appliance can obviously incline and deviate, and the appliance is convenient for a doctor to observe by naked eyes and correct in time.

As shown in fig. 2 and 4, the tooth surface of the dental prosthesis 3 is provided with a coupling groove, and the connecting block 31 is inserted into the coupling groove and fixedly coupled to the groove wall of the coupling groove by an adhesive. A first slot 311 is formed in one side of the connecting block 31, which is far away from the connecting slot, a first inserting block is fixedly connected to a position, corresponding to the first slot 311, of the positioning block 4, and the first inserting block is tightly matched with the first slot 311. The first slot 311 is communicated with the top side of the connecting block 31, so that the first slot 311 can be inserted from the top end of the first slot and can be gradually abutted against the bottom of the slot during installation.

As shown in fig. 3, the dental prosthesis 3 is fixedly connected with the tension clamping blocks 32 at two sides of the teeth, the tension bolts 321 are screwed on the tension clamping blocks 32, the tension clamping plates 322 are fixedly arranged on the tension bolts 321, and after the positioning belt 41 is connected with each positioning block 4, the tension clamping plates 322 are matched with the tension clamping blocks 32 to clamp two ends of the positioning belt 41, so as to tension the positioning belt 41.

As shown in fig. 4, a second insert block is fixedly connected to the lower side of the positioning block 4, and a second slot 11 is formed in the top side of the bracket 1. Offer on the lateral wall of holding in the palm groove 1 and keeping away from tooth false mould 3 with the groove 12 that compresses tightly of second slot 11 intercommunication, compress tightly the spring preforming of fixed connection on the cell wall of groove 12 orientation downside, the spring preforming is fixed to be equipped with towards one side of second inserted block and compresses tightly bead 1211, the edge groove 441 has been offered on the second inserted block with compressing tightly the relative position of bead 1211, the spring preforming supports tightly the second inserted block to second inserted block direction, and through the cooperation that compresses tightly bead 1211 and edge groove 441, the condition that the unexpected separation of locating piece 4 and support groove 1 leads to locating piece 4 to holding in the palm the position of groove 1 to fail has been reduced

As shown in fig. 5, the two sides of the holding groove 1, which are located in the pressing groove 12, are provided with an elastic swing link 13 parallel to the surface of the holding groove 1, one end of the elastic swing link 13 is fixedly connected with the surface of the holding groove 1, and the other end is fixedly connected with a clamping piece 131, the clamping piece 131 firstly extends towards the pressing groove 12, then bends and extends into the second slot 11 and bends towards the second insert again towards the spring pressing piece. One end of the clamping piece 131 close to the spring pressing piece is provided with a jacking protrusion 1311 towards one side of the spring pressing piece, when the positioning block 4 is required to be separated from the bracket 1, a doctor clamps the two elastic swing rods 13 through dental forceps, the two clamping pieces 131 move towards the lower side of the spring pressing piece, so that the spring pressing piece is jacked towards the direction far away from the second inserting block through the jacking protrusion 1311, the pressing convex rib 1211 is separated from the groove wall of the edge groove 441, and then the positioning block 4 is separated from the bracket 1 through another forceps.

As shown in fig. 5, a protective sticker is attached to the side of the bracket 1 facing the dental prosthesis 3 for reducing the possibility that the bracket 1 is contaminated by foreign materials and affects the bonding effect before being installed in the oral cavity of a patient.

The implementation of this embodiment is as follows: through the three-dimensional model that establishes according to spiral CT's scanning result, through the tooth false mould 3 of cnc engraving and milling machine support plastics material, through assembling in advance the correction device on tooth false mould 3, then once only shift and paste in patient's oral cavity, the step that has reduced the operation in patient's oral cavity collection of needs has reduced operating time promptly, and because the correction device volume after assembling is great, it is more obvious when taking place to incline or skew, be easily discovered by the doctor and adjust.

The embodiment of the application also discloses an orthodontic method based on the spiral CT three-dimensional reconstruction technology, which comprises the following steps:

a1, carrying out spiral CT scanning on the oral cavity of a patient, and carrying out three-dimensional modeling according to volume data obtained by scanning, wherein the modeling is generally carried out by using a surface shadow display method (SSD), a volume imaging method (VR), a Maximum Intensity Projection (MIP) method and a curved surface reconstruction Method (MPR);

a2, repairing the defects of the three-dimensional model, and reducing the defects of a cavity, a section and a ghost in the three-dimensional model;

a3, introducing the repaired three-dimensional model into a numerical control engraving and milling machine, converting a three-dimensional model file into a file format recognized by the numerical control engraving and milling machine through a computer, or manually reconstructing a three-dimensional model capable of being recognized by the numerical control engraving and milling machine according to the existing three-dimensional model, and engraving and processing a tooth dummy through the numerical control engraving and milling machine;

a4, fixedly installing connecting blocks 31 on the tooth surface of the tooth dummy 3, connecting positioning blocks 4 on the connecting blocks 31, and installing and connecting the brackets 1 and the positioning blocks 4;

a5, soaking and softening the positioning belts 41 made of low-temperature thermoplastic high polymer materials in hot water, penetrating through each positioning block 4, and tensioning the positioning belts 41 until the positioning belts 41 are solidified again;

a6, threading the arch wire 2 on each bracket 1, and bending the arch wire 2 between the brackets 1 to relatively fix the arch wire 2;

a7, connecting each positioning block 4 with the bracket 1, taking the bracket 1 off from the dental dummy 3, tearing off the protective sticker on each bracket 1, and smearing dental adhesive on one surface of the bracket 1 facing to the tooth;

a8, placing each bracket 1 into the oral cavity of a patient, adjusting the position to align and then bonding the brackets together into the oral cavity of the patient, separating all the positioning blocks 4 from the brackets 1 after the brackets 1 are firmly bonded, and taking out the whole body formed by the positioning blocks 4 and the fixing belts from the oral cavity of the patient to finish the installation of the appliance.

The implementation principle of the embodiment is as follows: by the method, the steps of operating in the mouth of a patient are reduced, the time for operating in the mouth is shortened, and the time for the patient to feel uncomfortable is reduced.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.