A method for mass positioning and welding of orthodontic personalized brace base plates

Abstract

This invention discloses a method for mass production and positioning welding of personalized orthodontic appliance base plates. This invention offers high efficiency and greater precision and stability in the fabrication of personalized multi-tooth or full-mouth orthodontic appliances: ① By arranging personalized base plates on a substrate and utilizing 3D printing technology, personalized base plates for multiple teeth or full mouths can be printed and fabricated in one go, significantly improving efficiency compared to the prior art of printing personalized base plates individually; ② Positioning and limiting components on the substrate and positioning plate allow for precise one-time positioning of welding holes and corresponding personalized base plates, followed by positioning welding through these holes. This not only increases efficiency but also reduces the accumulation of errors from individual positioning, insertion, bonding, or welding, resulting in smaller errors and greater precision and stability; ③ The appliance body and positioning plate can be mass-produced in a standardized manner, further improving the fabrication efficiency of personalized orthodontic appliances and reducing costs.

Description

Technical Field

[0001] This invention relates to the field of orthodontic appliance manufacturing technology, and in particular to a method for mass positioning and welding of the base plate of a personalized orthodontic appliance. Background Art

[0002] Orthodontic appliances typically consist of two parts: the base plate and the main body of the appliance. The main body usually includes grooves, bracket wings, and archwire locking devices. In appliance manufacturing, a standardized base plate and main body are aligned and welded together in a welding machine to obtain the final appliance product. However, appliances manufactured using this method, being standardized products, are difficult to meet the needs of personalized treatment goals.

[0003] In orthodontic treatment, to accurately match the patient's tooth morphology, precisely control tooth movement, and achieve personalized treatment goals, it is necessary to fabricate personalized orthodontic appliances that suit the patient's tooth morphology and final treatment objectives. This is especially true in lingual orthodontic treatment, where patients exhibit significant individual differences in lingual morphology. Therefore, after setting the target tooth alignment based on the treatment goals, it is crucial to precisely determine the three-dimensional position of the appliance body, the personalized base plate, and the tooth surface, and then fabricate the personalized appliance.

[0004] Currently, there are three main methods for preparing personalized orthodontic appliances:

[0005] ① Integral Casting Personalized Orthodontic Appliances: These appliances are designed using software to create three-dimensional data of the appliance. After producing a corresponding personalized wax model, the appliance is formed through integral casting and post-processing.

[0006] ②3D metal printed personalized orthotics: These orthotics are printed as a whole using a 3D metal printer and then polished to form the orthotics.

[0007] The orthodontic bodies prepared by the above two methods have low processing precision, and it is difficult to polish the fine structures such as the grooves of the orthodontic body. The production efficiency is low, and it is difficult to achieve mass production of personalized self-locking orthodontic bodies with complex structures.

[0008] ③ Personalized Orthodontic Manufacturing Through Partial Interlocking and Positioning of Individual Orthodontic Appliances: This method first prepares an orthodontic body with positioning grooves or blocks, and a personalized base plate with corresponding positioning structures. Then, the production of a single orthodontic appliance is completed through partial interlocking of the individual appliance body with the personalized base plate. However, this method involves designing positioning structures on both the individual appliance body and the base plate. These structures are less than 2mm in size, which is too small, leading to large local errors in 3D printing, making precise and stable positioning and welding difficult. Furthermore, this method is only suitable for positioning and welding of single orthodontic appliances, resulting in low production efficiency.

[0009] Specific existing technologies corresponding to the above methods include, for example, the invention patent with application publication number CN 112472331 A, "A method for manufacturing a personalized lingual orthodontic appliance"; the invention patent with authorization publication number CN 106955167 B, "A method for preparing a modular personalized lingual orthodontic appliance and the appliance prepared by the method"; and the invention patent with authorization publication number CN 105030349 B, "A method for manufacturing a personalized lingual straight wire self-ligating orthodontic appliance". The manufacturing steps include casting a metal appliance base plate-connector, a metal appliance body, and a lingual tube; assembling the appliance body, appliance base plate-connector, and self-ligating spring by welding them together using a fixture; and having a welding positioning block on each side of the base plate-connector. During welding, the appliance body and the base plate are fixed together by laser welding using a fixture. For example, the invention patent CN114762629 A, entitled "A Method for Opening a Mold for a Personalized Lingual Braces Base Plate and a Method for Producing Personalized Lingual Braces Using the Mold Obtained by the Method," provides a method for opening a mold for a personalized lingual braces base plate. The method determines the size of the mold base plate based on the size range of the personalized lingual braces base plate for different tooth positions. The tooth model is assembled and adjusted within the mold base plate, and the final personalized lingual braces base plate mold (a concave model cavity) is obtained through Boolean operations. However, in the implementation of this method, the mold preparation for producing the personalized braces base plate is challenging because different patients have significant differences in the position of the braces body and the shape of the personalized base plate. Different personalized base plate molds need to be prepared for each patient, increasing the overall manufacturing process and difficulty, making mass production difficult.

[0010] In summary, existing technologies using integral casting personalized aligners and 3D metal printing personalized aligners both suffer from difficulties in mass production of personalized self-ligating aligners with complex structures, resulting in low production efficiency. Alternatively, when fabricating personalized aligners by partially splicing and positioning individual aligners, the aligners and base plates are too small (2-4mm), the 3D metal printing positioning structure is too tiny, resulting in large local errors and making it difficult to accurately and stably position and weld them. Furthermore, these technologies are only suitable for positioning and welding personalized aligners for single teeth, leading to low production efficiency. Summary of the Invention

[0011] Therefore, based on the above background, the present invention provides a method for batch positioning and welding of personalized orthodontic appliance base plates, which can print personalized base plates for multiple teeth or the entire mouth of teeth as a whole, and weld the personalized base plates to the corresponding appliance body at the same time. This method is not only highly efficient, but also more precise and stable.

[0012] The technical solution provided by this invention is as follows:

[0013] A method for mass positioning and welding of base plates for personalized orthodontic appliances, comprising the following steps:

[0014] S1: Obtain the patient's three-dimensional digital dental information, use design software to construct an initial dental model based on the dental information, and continue to use design software to perform virtual tooth arrangement based on the initial dental model to obtain a patient-specific target dental model that meets the treatment goals.

[0015] S2: Using design software, based on the initial and target dental models, the main body of the orthodontic appliance is three-dimensionally positioned on the initial dental model, and a personalized base plate corresponding to each tooth is designed in combination with the tooth surface morphology and occlusal state.

[0016] The personalized base plate has a first welding surface for welding to its corresponding orthodontic body; the orthodontic body has a second welding surface corresponding to the first welding surface;

[0017] S3: In the design software, design and construct a three-dimensional model of the base, and combine the arrangement of the limiting structure of the orthodontic body corresponding to the teeth on the positioner. Transform the personalized base plate designed in step S2 into coordinates and arrange it on the three-dimensional model of the base.

[0018] S4: After aligning the second welding surface of the corrector body with the first welding surface of the corresponding personalized base plate using design software, obtain the welding edge shape coordinates and calculate and generate an automated laser welding path.

[0019] S5: After making the base with personalized base plates, perform grinding and polishing.

[0020] The base with personalized base plates can be manufactured directly using 3D printing technology in one piece.

[0021] Alternatively, a base can be made using CNC technology first, and then a personalized base plate can be printed on the base using an SLM printer with three-dimensional positioning.

[0022] S6: Place the base with the personalized base plate arranged after grinding and polishing in step S5 on the worktable of the laser welding machine. Embed or clamp the main body of the orthodontic appliance corresponding to the teeth into the positioner through the corresponding limiting structure. Then, position and connect the positioner to the base through the positioning and limiting structure.

[0023] Alternatively, a CNC robotic arm can be used to perform CNC positioning based on the arrangement of the personalized base plates on the base and the relative position of the corrector body embedded or clamped by the limiting structure on the locator, so as to position and fit the first welding surface of the personalized base plate with the corresponding second welding surface of the corrector body.

[0024] S7: Using a laser welding machine, according to the automated laser welding path obtained in step S4, firstly, partially weld the first welding surface of the partially exposed personalized base plate to the welding edge of the second welding surface of the positioning and fitting orthodontic body, and initially weld and fix the orthodontic body and the personalized base plate. Then, manually or with a CNC robotic arm, remove the locator to fully expose the welding edge. Then, according to the automated laser welding path obtained in step S4, complete the full welding of the welding edge between the orthodontic body and the personalized base plate.

[0025] S8: After the personalized base plate of the welded orthodontic body is cut off from the base plate, the personalized base plate is polished to obtain the personalized orthodontic for clinical use.

[0026] Preferably, the personalized base plates arranged on the base in step S3 can correspond to one or more sets of orthodontic appliances for all teeth of one patient, or one or more sets of orthodontic appliances for all teeth of multiple patients, or orthodontic appliances for multiple teeth of one or more patients.

[0027] Preferably, the design software in steps S1 to S4 is one of 3shape, Maestro-ortho, Bluesky-ortho, and Meshlab.

[0028] Preferably, the 3D printing technology in step S5 is one of metal 3D printing, 3D printing wax pattern technology, or resin photopolymerization 3D printing technology.

[0029] Preferably, the base and the locator are both flat plates.

[0030] Preferably, the positioning limiting component includes a positioning pin and a positioning slot corresponding to the positioning pin.

[0031] Preferably, the positioning pin is located on the base plate, and the positioning slot is located on the positioning plate.

[0032] Preferably, the main body of the orthodontic appliance is mass-produced in a standardized manner using metal powder injection molding technology or computer-controlled precision machining technology according to the teeth at the corresponding positions.

[0033] Preferably, the positioner is mass-produced using metal powder injection molding technology, computer digital control precision machining technology, or 3D printing technology;

[0034] Preferably, in step 3, only the three-dimensional model of the base 1 can be designed and constructed in the design software, and the personalized base plate 4 designed in step S2 can be transformed in coordinates and arranged on the three-dimensional model of the base 1.

[0035] In step S6, the base with personalized base plates arranged in step S5 is placed on the worktable of the laser welding machine. The CNC robotic arm that holds the corrector body is positioned and controlled according to the three-dimensional coordinate positioning, and the first welding surface of the corrector body is positioned and attached to the second welding surface of the corresponding personalized base plate one by one.

[0036] In step S7, the automated laser welding path obtained in step S4 is used to complete the welding of the corrector body and the personalized base plate edge one by one.

[0037] The beneficial effects of adopting the above technical solution are as follows:

[0038] This invention offers high efficiency and greater precision and stability in the fabrication of personalized orthodontic appliances for multiple teeth or full mouths.

[0039] ① By arranging personalized base plates on a substrate, and using 3D printing technology, personalized base plates corresponding to multiple teeth or the entire mouth of teeth can be printed and prepared in one go. Compared with the existing technology, which prints personalized base plates one by one, its efficiency is significantly improved.

[0040] ② By using the positioning and limiting components on the base plate and the positioning plate, the welding hole and the corresponding personalized base plate can be accurately positioned in one go. Then, positioning welding is performed through the welding hole. This not only has high efficiency, but also reduces the accumulation of errors from individual positioning, insertion, bonding or welding, resulting in smaller errors and greater accuracy and stability.

[0041] ③ The standardized mass production of the main body and positioning plate of the orthodontic appliance can further improve the production efficiency of personalized orthodontic appliances and reduce costs. Attached Figure Description

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 : A schematic diagram of the substrate structure of the present invention Figure 1 .

[0044] Figure 2 : A schematic diagram of the substrate structure of the present invention Figure 2 .

[0045] Figure 3 : This is a schematic diagram of the positioning plate of the present invention. Figure 1 .

[0046] Figure 4: This is a schematic diagram of the positioning plate of the present invention. Figure 2 .

[0047] Figure 5 : This is a schematic diagram of the structure of the orthodontic appliance body corresponding to one of the teeth in this invention.

[0048] Figure 6 : This is a reference for the usage state of the orthodontic device body after welding with the corresponding personalized base plate of the present invention. Figure 1 .

[0049] Figure 7 : This is a reference for the usage state of the orthodontic device body after welding with the corresponding personalized base plate of the present invention. Figure 2 .

[0050] Figure 8 : This refers to the initial dental model corresponding to step S1 of the present invention.

[0051] Figure 9 : This is a schematic diagram of step S4 in the welding process of the present invention.

[0052] Figure 10 : This is a schematic diagram of step S8 in the welding process of the present invention. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "vertical," "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0055] In the description of this invention, "first feature" and "second feature" may include one or more of the indicated features. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of the indicated features.

[0056] The present invention will be further described below with reference to the accompanying drawings.

[0057] Example 1: Refer to Figures 1 to 10 The method for welding the base plate of a personalized multi-tooth orthodontic appliance includes the following steps:

[0058] S1: Obtain the patient's three-dimensional digital dental information, use design software to construct an initial dental model based on the dental information, and continue to use design software to perform virtual tooth arrangement based on the initial dental model to obtain a patient-specific target dental model that meets the treatment goals.

[0059] In this step, the 3D digital information of the teeth and jaws is obtained by directly scanning the teeth and jaws intraorally using a digital intraoral 3D scanner. Then, an initial tooth and jaw model and a target tooth and jaw model are constructed using one of the following design software: 3shape, Maestro-ortho, Bluesky-ortho, or Meshlab. An example of the initial tooth and jaw model constructed is shown below. Figure 8 As shown.

[0060] S2: Using design software, based on the initial dental model and the target dental model, the main body 3 of the orthodontic appliance is three-dimensionally positioned on the initial dental model, and a personalized base plate 4 corresponding to each tooth is designed in combination with the tooth surface morphology and occlusal state.

[0061] The personalized base plate 4 has a first welding surface 41 for welding to its corresponding orthodontic body 3; the orthodontic body 3 has a second welding surface 311 corresponding to the first welding surface 41.

[0062] S3: In the design software, design and construct a three-dimensional model of the base 1, and combine the arrangement of the limiting structure of the orthodontic body corresponding to the teeth on the positioner. Transform the personalized base plate 4 designed in step S2 into coordinates and arrange it on the three-dimensional model of the base 1.

[0063] The shape of the orthodontic appliance varies depending on the position of the teeth in the entire dentition. For example, buccal-lingual tubes (a type of orthodontic appliance, whose structure also includes the appliance body and base plate, a standard technique that will not be elaborated upon) are typically used for the first and second molars. Therefore, the limiting structure of the appliance body on the locator differs for teeth in different positions to better accommodate or clamp the appliance body for better insertion and fixation.

[0064] More specifically, the morphology of the second welding surface of the orthodontic appliance body, which corresponds to different teeth and has morphological differences, also varies to some extent with its corresponding first welding surface. However, as... Figure 1 As shown, the first welding surface can be a regular plane, for example... Figure 1 As shown, the shape can be trapezoidal, square, or even curved. Any edge shape that facilitates path recognition and automated welding by the welding machine is acceptable, but regular planes are preferred.

[0065] Specifically, the locators involved in this step can be mass-produced using 3D printing. That is, the arrangement of the limiting structure of the main body of the orthodontic appliance corresponding to teeth in different positions is fixed. The arrangement of the personalized base plate of the orthodontic appliance corresponding to teeth in different positions corresponds to the limiting structure of the main body of the orthodontic appliance, and its arrangement is also fixed.

[0066] The locator can be made of materials such as metal, resin, or plastic.

[0067] In specific implementation, the personalized base plate 4 arranged on the base 1 in step S3 can correspond to one or more sets of orthodontic main bodies for one patient's entire dentition, or one or more sets of orthodontic main bodies for the entire dentition of multiple patients, or orthodontic main bodies for multiple teeth of one or more patients.

[0068] For example, the personalized base plates arranged on base 1 can correspond to a set of orthodontic appliances for a patient's entire dentition;

[0069] Alternatively, the personalized base plates arranged on base 1 can correspond to two or more sets of orthodontic appliance bodies for a patient's entire dentition;

[0070] Alternatively, the personalized base plates arranged on the base 1 can correspond to one set of orthodontic appliances for each of the two patients' full dentitions, that is, a total of two sets of full dentition appliance bodies. The above is not limited, and the corresponding orthodontic appliance bodies can be designed and arranged on the base according to actual needs.

[0071] S4: After aligning the second welding surface 311 of the corrector body 3 with the first welding surface 41 of the corresponding personalized base plate using design software, the coordinates of the welding edge shape are obtained, and an automated laser welding path is calculated and generated.

[0072] S5: After making the base with the personalized base plate 4, perform grinding and polishing.

[0073] The base with the personalized base plate 4 can be manufactured directly using 3D printing technology in one piece.

[0074] Alternatively, CNC technology can be used to create the base 1 first, and then an SLM printer can be used to 3D position and print a personalized base plate 4 on the base 1.

[0075] S6: Place the base 1 with the personalized base plate 4 arranged after grinding and polishing in step S5 on the worktable of the laser welding machine. Embed or clamp the locator 2 with the corresponding limiting structure 23. Then, connect the locator 2 to the base through the positioning and limiting structure.

[0076] Alternatively, a CNC robotic arm can be used to perform CNC positioning based on the arrangement of the personalized base plate 4 on the base and the relative position of the corrector body embedded or clamped by the limiting structure 23 on the positioner, so as to position and fit the first welding surface 41 of the personalized base plate 4 with the second welding surface 311 of the corresponding corrector body 3.

[0077] S7: Using a laser welding machine, according to the automated laser welding path obtained in step S4, the first welding surface 41 of the partially exposed personalized base plate 4 is partially welded to the welding edge of the second welding surface 311 of the positioning and fitting orthodontic body 3, so that the orthodontic body 3 and the personalized base plate 4 are initially welded and fixed. Then, the positioner 2 is removed manually or by CNC robotic arm to fully expose the welding edge. Then, the welding edge of the orthodontic body and the personalized base plate is fully welded according to the automated laser welding path obtained in step S4.

[0078] S8: After the personalized base plate of the welded orthodontic body is cut off from the base plate, the personalized base plate is polished to obtain the personalized orthodontic for clinical use.

[0079] In one embodiment, the base 1 is a flat plate, for example... Figure 1 and Figure 2 As shown, where Figure 1 The above is the base designed or printed in step S3, on which personalized base plates are arranged. The personalized base plates are arranged in rows on the same straight line to facilitate better one-time positioning. The base plates are, for example, H-shaped or I-shaped plates, depending on the implementation method. Correspondingly, the corresponding corrector main limiting structure on the positioner is arranged in a straight line.

[0080] Preferably, the base has a through hole in the middle, and at least one horizontal plate is provided on each side wall of the through hole. The personalized base plates are arranged on the horizontal plates and the frame of the base plate to facilitate the arrangement of the personalized base plates in a row.

[0081] The positioning and limiting structure includes positioning posts 12 and positioning slots 22 corresponding to the positioning posts 12. The positioning posts 12 are located on the base 1, and the positioning slots 22 are located on the positioner 2. In this embodiment, the positioning posts are distributed at least at the four corners of the base plate 1 to facilitate better stable positioning.

[0082] The main body 3 of the orthodontic appliance is mass-produced in a standardized manner using metal powder injection molding technology or computer-controlled precision machining technology according to the corresponding position of the teeth. The shape of the main body of the orthodontic appliance varies for teeth in different locations, such as a buccal tube. The main body 3 of the orthodontic appliance is mass-produced in a standardized manner according to teeth in different locations. The corresponding orthodontic appliance body 3 is selected according to the personalized base plate on the base corresponding to the teeth in different locations. Specifically, the main body of the orthodontic appliance is provided with a standard welding block 31 according to the corresponding personalized base plate. The welding block 31 has a standard second welding surface 311.

[0083] Alternatively, in another embodiment, the positioner 2 is mass-produced using metal powder injection molding technology, computer digital control precision machining technology, or 3D printing technology; the limiting structure includes a limiting hole, and a snap-fit ​​structure is designed in the limiting hole according to the shape of the orthodontic body (designing different snap-fit ​​structures according to the shape is existing technology and will not be described in detail here) to embed and snap or clamp and fix the orthodontic body.

[0084] Alternatively, in a specific application, the limiting hole should allow the welding edges of the first and second welding surfaces to be exposed after the corrector body is installed on the positioner, so that the laser of the laser welding machine can directly weld the welding edges.

[0085] Alternatively, in another embodiment, a magnet is provided within the limiting hole to attract and further stabilize the orthodontic body partially embedded therein through magnetic attraction. When the orthodontic body is embedded into or clamped onto the positioning device 2 via the corresponding limiting structure 23, the bracket wings of the orthodontic body face the limiting hole and are inserted into the limiting hole until they are snapped or magnetically secured.

[0086] Figure 9 This is a schematic diagram showing the connection between the positioner and the base via a positioning and limiting structure. Figure 10 The diagram shows the operation of removing the locator in step S7. The locator 2 is moved upwards, and the locator is separated from the main body of the corrector after being welded to the personalized base plate.

[0087] The design software used in steps S1 to S4 is one of 3shape, Maestro-ortho, Bluesky-ortho, or Meshlab.

[0088] Example 2: Compared with Example 1, in step 3, only the three-dimensional model of the base 1 can be designed and constructed in the design software. The personalized base plate 4 designed in step S2 is transformed by coordinate transformation and arranged on the three-dimensional model of the base 1.

[0089] In other words, the arrangement of the personalized base plates in this step does not need to consider the locator, and its arrangement is more flexible.

[0090] In step S6, the base 1 with the personalized base plates 4 made in step S5 is placed on the worktable of the laser welding machine. The CNC robotic arm that holds the corrector body 3 is positioned and controlled according to the three-dimensional coordinate positioning, and the first welding surface 311 of the corrector body 3 is positioned and attached to the second welding surface 41 of the corresponding personalized base plate 4 one by one.

[0091] In step S7, the automated laser welding path obtained in step S4 is used to complete the welding of the corrector body and the personalized base plate edge one by one.

[0092] Compared to Example 1, this embodiment allows for the welding of the main body of a multi-tooth orthodontic appliance in one go without the need for a locator.

[0093] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A method for mass positioning and welding of the base plate of a personalized orthodontic appliance, characterized in that, It includes the following steps: S1: Obtain the patient's three-dimensional digital dental information, use design software to construct an initial dental model based on the dental information, and continue to use design software to perform virtual tooth arrangement based on the initial dental model to obtain a patient-specific target dental model that meets the treatment goals. S2: Using design software, based on the initial and target dental models, the main body of the orthodontic appliance is three-dimensionally positioned on the initial dental model, and a personalized base plate corresponding to each tooth is designed in combination with the tooth surface morphology and occlusal state. The personalized base plate has a first welding surface for welding to its corresponding orthodontic body; the orthodontic body has a second welding surface corresponding to the first welding surface; S3: In the design software, design and construct a three-dimensional model of the base, and combine the arrangement of the limiting structure of the orthodontic body corresponding to the teeth on the positioner. Transform the personalized base plate designed in step S2 into coordinates and arrange it on the three-dimensional model of the base. The locator is equipped with a limiting structure for the main body of the orthodontic appliance corresponding to teeth in different positions; S4: After aligning the second welding surface of the corrector body with the first welding surface of the corresponding personalized base plate using design software, obtain the welding edge shape coordinates and calculate and generate an automated laser welding path. S5: After making the base with personalized base plates, perform grinding and polishing. The base with its personalized base plates is manufactured using 3D printing technology in a single piece. Alternatively, a base can be made using CNC technology first, and then a personalized base plate can be printed on the base using an SLM printer for three-dimensional positioning. S6: Place the base with personalized base plates arranged after grinding and polishing in step S5 on the worktable of the laser welding machine. Embed or clamp the main body of the orthodontic appliance corresponding to the teeth into the positioner through the corresponding limiting structure. Then, position and connect the positioner to the base through the positioning and limiting structure. Alternatively, a CNC robotic arm can be used to perform CNC positioning based on the arrangement of the personalized base plates on the base and the relative position of the corrector body embedded or clamped by the limiting structure on the locator, so as to position and fit the first welding surface of the personalized base plate with the corresponding second welding surface of the corrector body. S7: Using a laser welding machine, according to the automated laser welding path generated in step S4, the first welding surface of the partially exposed personalized base plate is partially welded to the welding edge of the second welding surface of the positioning and fitting orthodontic body, so as to initially weld and fix the orthodontic body and the personalized base plate. Then, the positioner is removed manually or by CNC robotic arm to fully expose the welding edge. Then, the welding edge of the orthodontic body and the personalized base plate is fully welded according to the automated laser welding path generated in step S4. S8: After the personalized base plate of the welded orthodontic body is cut off from the base plate, the personalized base plate is polished to obtain the personalized orthodontic body.

2. The method for mass positioning and welding of a personalized orthodontic appliance base plate according to claim 1, characterized in that, In step S3, the personalized base plates arranged on the base can correspond to one or more sets of orthodontic appliances for all teeth of one patient, or one or more sets of orthodontic appliances for all teeth of multiple patients, or orthodontic appliances for multiple teeth of one or more patients.

3. The method for mass positioning and welding of the base plate of a personalized orthodontic appliance according to claim 1, characterized in that, The design software used in steps S1 to S4 is one of 3shape, Maestro-ortho, Bluesky-ortho, or Meshlab.

4. The method for mass positioning and welding of the base plate of a personalized orthodontic appliance according to claim 1, characterized in that, The 3D printing technology in step S5 is one of metal 3D printing, 3D printing wax pattern technology, or resin photopolymerization 3D printing technology.

5. The method for mass positioning and welding of the base plate of a personalized orthodontic appliance according to claim 1, characterized in that, The base and the locator are both flat plates.

6. The method for mass positioning and welding of the base plate of a personalized orthodontic appliance according to claim 4, characterized in that, The positioning and limiting structure includes a positioning pin and a positioning slot corresponding to the positioning pin.

7. The method for mass positioning and welding of a personalized orthodontic appliance base plate according to claim 6, characterized in that, The positioning pin is located on the base, and the positioning slot is located on the locator.

8. The method for mass positioning and welding of the base plate of a personalized orthodontic appliance according to claim 1, characterized in that, The main body of the orthodontic appliance is mass-produced in a standardized manner using metal powder injection molding technology or computer-controlled precision machining technology, according to the required shape of the corresponding tooth position.

9. A method for mass positioning and welding of a personalized orthodontic appliance base plate according to claim 4, characterized in that, The positioner is mass-produced using metal powder injection molding technology, computer digital control precision machining technology, or 3D printing technology.

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