An auxiliary positioning device for micro-implant assisted rapid expansion of the upper jaw and a manufacturing method of the rapid expansion device of the upper jaw

Abstract

The application provides an auxiliary positioning device for micro-implant assisted maxillary rapid expansion and a manufacturing method of the maxillary rapid expansion device, and the auxiliary positioning device comprises a positioning guide plate, an implant pin seat positioning device and a screw expander positioning device used for positioning the implant pin in the mouth respectively. The implant pin position can be accurately positioned in the mouth through the customized positioning guide plate. In addition, the application adopts 3D printing to print the digital model of the patient's maxilla, the digital model of the micro-implant pin of the implant pin seat positioning device and the base part of the screw expander positioning device into one whole, and the positioning of the micro-implant pin printing model and the positioning base respectively provides the positioning of the implant pin and the screw expander, so that the final formed maxillary rapid expansion device is more accurate in the installation position in the mouth.

Description

[0001] This invention relates to the precise positioning of a maxillary rapid expander, specifically to an auxiliary positioning device for mini-implant-assisted maxillary rapid expander and a method for manufacturing the maxillary rapid expander. Background Technology

[0002] Micro-implant-assisted rapid palatal expansion (MARPE) is an orthodontic technique used to rapidly expand the maxillary palatal sutures to correct bony narrowing of the maxilla. A typical MARPE appliance consists of a spiral expander and four small micro-implants inserted through the gum line into the maxillary palatal bone plate, with the spiral expander mounted on the roof of the mouth. The micro-implants act as anchor points for the expander, and by rotating the spiral mechanism of the expander at a higher frequency, more efficient and effective palatal expansion is achieved.

[0003] Compared to traditional palatal expanders, the MARPE appliance has several advantages, including: 1. The micro-implant can directly apply expanding force to the palatal bones on both sides of the palatal suture, thus achieving more controllable and predictable expansion; 2. Compared to traditional expanders, MARPE treatment time is faster; 3. MARPE is relatively small, making it more comfortable for patients; 4. Compared to traditional expanders, the MARPE appliance has fewer side effects, such as significantly reducing molar tilting or root damage.

[0004] Because MARPE implants use micro-implants to penetrate the palatal mucosa and bone plate for retention, it is a somewhat invasive method. Therefore, the effectiveness of this method in achieving better results and reducing adverse side effects depends on the accurate positioning of the micro-implant and spiral expander. Insufficient implant length will affect MARPE retention, while excessive implant length can easily lead to damage to the nasal mucosa, causing symptoms such as nasal bleeding. Incorrect implant orientation may also damage the tooth root. Currently, there is no ideal method for positioning the micro-implant and spiral expander.

[0005] The rapid development of digital technology in orthodontics has recently changed some traditional workflows. The widespread clinical application of cone-beam computed tomography (CBCT), intraoral scanning / model scanning, and 3D printing technologies has made digital measurement and positioning of micro-implant-assisted maxillary rapid expansion devices possible. Two issues need to be addressed: 1. Precise positioning of the micro-implant in the palate; 2. Achieving stability of the palatal expander during the later fabrication process. Summary of the Invention

[0006] This invention provides an auxiliary positioning device for rapid maxillary expansion assisted by micro-implants. The rapid maxillary expander consists of a spiral expander, a connecting rod, and a band. The two sides of the spiral expander are connected to the band via the connecting rod. An implant holder is fixedly connected to the spiral expander or the connecting rod. The rapid maxillary expander is assembled on a maxillary solid model printed based on a digital three-dimensional model of the patient's oral cavity. Intraorally, the implant holder is connected to the implant clip of the implanted maxillary bone plate to fix the rapid maxillary expander.

[0007] The auxiliary positioning device includes a positioning guide plate for implanting nails in the positioning port, an implant nail holder positioning device, and a spiral expander positioning device.

[0008] The positioning guide plate is temporarily installed in the mouth by engaging with multiple teeth and has positioning holes for positioning the implant pins;

[0009] The implant pin holder positioning device includes a micro implant pin printing model and a metal retainer. The micro implant pin printing model is integrally formed with the maxillary solid model and protrudes from the maxillary surface of the maxillary solid model. The metal retainer is detachably fitted onto the micro implant pin printing model.

[0010] The spiral amplifier positioning device includes a detachable, snap-fit ​​positioning base and a top cover. Both the positioning base and the top cover have positioning grooves on their mating surfaces that conform to the outer contour of the spiral amplifier. The positioning base is integrally molded with the maxillary solid model.

[0011] After installing the positioning guide plate inside the mouth and installing the implant through the implant positioning hole, remove the positioning guide plate.

[0012] The spiral expander is installed on the positioning base of the maxillary solid model and the top cover is fastened to clamp and fix the spiral expander. The spiral expander is fixedly connected to the rings on both sides by the connecting rod. The metal clasp placed on the micro implant printing model is welded to the connecting rod or the spiral expander to form a maxillary rapid expander, with the metal clasp serving as the implant holder.

[0013] Furthermore, the metal retaining ring is provided with an elastic buckle that connects to the micro implant clip, and the outer edge of the metal retaining ring is provided with a welding sleeve. The welding sleeve is welded to the connecting rod or the spiral expander by welding wire, and one end of the welding wire passes through the welding sleeve and is welded and fixedly connected to the welding sleeve.

[0014] Furthermore, the micro-implant printed model protrudes from the palate of the maxillary solid model, and the micro-implant printed model has a step that engages with the elastic clip.

[0015] Furthermore, the positioning base is detachably connected to the top cover via a snap-fit ​​mechanism.

[0016] Furthermore, the positioning guide plate includes a crown portion that is fitted onto the tooth, an implant positioning seat that is close to the palate, and a connecting part for connecting the crown portion and the implant positioning seat. The crown portion, the implant positioning seat, and the connecting part are integrally formed, and the implant positioning hole is provided on the implant positioning seat.

[0017] The crown portion consists of a first crown fitted onto the incisor and a second crown fitted onto the molars on both sides. The first crown is separated from the second crown on both sides, and both the first and second crowns have observation holes.

[0018] A method for manufacturing a maxillary rapid expander based on the above-mentioned auxiliary positioning device, the method comprising the following steps:

[0019] S1. Obtain a digital 3D model of the patient's oral cavity;

[0020] S2. Import the digital model of the micro implant stub print model into the oral digital 3D model;

[0021] S3. Adjust the position of the digital model of the micro implant 3D model in the oral digital model to the ideal implantation position of the micro implant;

[0022] S4. Based on the tooth contour and micro-implant orientation of the digital three-dimensional model of the oral cavity, a positioning guide is designed, and the micro-implant printed model passes through the implant positioning hole of the positioning guide in the digital three-dimensional model.

[0023] S5. After fitting the digital model of the spiral amplifier and the spiral amplifier positioning device, import it into the digital three-dimensional model of the oral cavity, and adjust the position of the spiral amplifier positioning device according to the position of the micro implant printed model.

[0024] S6. Design of bands on both sides of the tooth contour based on the digital three-dimensional model of the oral cavity;

[0025] S7. Fit the digital model of the auxiliary positioning device with the digital three-dimensional model of the oral cavity, and use 3D printing technology to print a maxillary solid model with a micro implant printing model and a positioning base. The top cover and positioning guide are printed separately.

[0026] S8. Install the spiral expander into the positioning slot of the positioning base and fasten the top cover to clamp and fix the spiral expander, and fix the pre-made metal retaining ring on the micro implant pin printing model.

[0027] S9, the metal band is placed on the teeth on both sides of the maxillary solid model, the spiral expander is fixedly connected to the band by the connecting rod, and the metal clasp is welded to the connecting rod or the spiral expander to form a maxillary rapid expander, with the metal clasp serving as the implant holder;

[0028] S10. Remove the top cover and take out the prepared maxillary rapid expander.

[0029] Furthermore, in step S1, after performing CBCT scanning and intraoral dental scanning, the CBCT scanning model is fitted with the intraoral dental scanning model to obtain a digital three-dimensional model of the patient's oral cavity.

[0030] The innovation of this invention lies in:

[0031] 1) Adjust the position of the micro implant 3D model in the oral digital model until the micro implant is in the ideal implantation position. Then, design a positioning guide based on the tooth contour of the oral digital 3D model and the orientation of the micro implant 3D model. Since the positioning guide has implant positioning holes corresponding to the orientation of the micro implant, the positioning guide can quickly and accurately locate the implantation position of the micro implant when it is printed and installed in the mouth.

[0032] 2) 3D printing is used to print the patient's maxilla, the micro-implant model of the implant holder positioning device, and the base of the spiral expander positioning device into a single unit. When assembling the maxillary rapid expander on the maxillary solid model, the spiral expander is clamped and fixed to the base in the optimal installation position. A metal retainer is then fixedly placed on the micro-implant model. After the spiral expander is connected to the retainer via a steel wire connecting rod, the metal retainer is welded to the steel wire connecting rod, serving as the implant holder. During the assembly of the maxillary rapid expander on the model, this invention provides positioning for the implant and spiral expander through the micro-implant model and positioning base, respectively, resulting in a more precise intraoral installation of the final maxillary rapid expander. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a digital three-dimensional model of the patient's oral cavity obtained by fitting a CBCT scan model with an intraoral dental scan model according to the present invention.

[0035] Figure 2 A schematic diagram illustrating the importation of a digital model of a micro implant digitized model into a digital 3D model of a patient's oral cavity;

[0036] Figure 3 for Figure 2 Cross-sectional view;

[0037] Figure 4 In order to be in Figure 2 A diagram showing the adjustment of the implant nail position based on the original design;

[0038] Figure 5 A schematic diagram for designing a positioning guide plate in a digital model;

[0039] Figure 6 A schematic diagram for importing the digital 3D model of the positioning base;

[0040] Figure 7 A schematic diagram of a spiral expander on a positioning base in a digital 3D model;

[0041] Figure 8 In order to be in Figure 7 A schematic diagram of a top cover superimposed on a base;

[0042] Figure 9 A schematic diagram for importing a digital 3D model of a metal clasp;

[0043] Figure 10 A schematic diagram showing the assembly of a maxillary rapid expander onto a maxillary solid model;

[0044] Figure 11 This is a cross-sectional view of the mating of the metal clasp and the micro implant pin;

[0045] Figure 12 This is a 3D diagram showing the combination of a metal retainer and a micro implant. Detailed Implementation

[0046] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0047] To fully understand this invention, detailed steps and structures will be presented in the following description to illustrate the technical solution of this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0048] The current method for fabricating a maxillary rapid expander involves printing a maxillary model based on a template and customizing the band. The band 13 is then placed on the teeth on both sides of the maxillary model. The spiral expander 11 is connected to the band 13 via a wire, and the implant holder is welded to the wire. However, this method has the following drawbacks: neither the implant holder nor the spiral expander 11 has auxiliary positioning during installation, and the final fixation position is often not ideal. This also results in the micro-implant being installed in an undesirable position, and the drilling depth of the micro-implant relies entirely on the dentist's experience; too deep or too shallow a depth is unsuitable.

[0049] This invention provides an auxiliary positioning device comprising a positioning guide plate for positioning implant pins, implant pin holders, and a spiral expander, respectively, a positioning device for the implant pin holder, and a positioning device for the spiral expander. The structures of the positioning guide plate, the implant pin holder positioning device, and the spiral expander positioning device are further described below:

[0050] Positioning guide plate

[0051] The positioning guide 50 is customized according to the patient's oral cavity and the position of the micro-implant print model 41 positioned in the model. After being worn in the mouth, it can quickly locate the implant position. Figure 5 As shown, the positioning guide plate 50 consists of a crown portion 52 that fits onto the tooth, an implant positioning seat 53 that fits tightly against the maxillary surface, and a connecting portion 54 for connecting the crown portion and the implant positioning seat. The crown portion 52, the implant positioning seat 53, and the connecting portion 54 are integrally formed, and two implant positioning holes 51 are provided on the implant positioning seat 53.

[0052] The crown portion 52 consists of a first crown 52-1 fitted onto the incisor and second crowns 52-2 fitted onto the two molars on either side. The first crown 52-1 is disconnected from the second crowns 52-2 on both sides. Both the first crown 52-1 and the second crown 52-2 have observation holes 52-3. The positioning guide plate 50 with this structural form improves the stability of the overall structure and reduces the amount of printing material and customization difficulty.

[0053] After the positioning guide plate 50 is customized in the model, it is printed out as a whole and installed into the mouth. The two implant positioning holes 51 of the positioning guide plate 50 provide installation positioning for the implants in the mouth.

[0054] Plant nail holder positioning device

[0055] like Figures 11-12As shown, the implant clasp positioning device includes a micro implant stub print model 41 and a metal clasp 42. The micro implant stub print model 41 is integrally formed with the maxillary solid model 20 printed based on a digital 3D model of the patient's oral cavity. The micro implant stub print model 41 protrudes vertically from the maxillary surface. In the maxillary solid model 20, the metal clasp 42 is detachably fitted onto the micro implant stub print model 41, and the metal clasp 42 fitted onto the micro implant stub print model 41 is non-rotatable.

[0056] The metal retaining ring 42 is equipped with an elastic buckle 42-1 that connects to the micro implant clip, and a welding sleeve 42-2 is provided on the outer edge of the metal retaining ring 42. The welding sleeve 42-2 is welded to the connecting rod 12 or the spiral expander 11 by welding wire. One end of the welding wire passes through the welding sleeve 42-2 and is welded and fixedly connected to the welding sleeve 42-2. The welding sleeve 42-2 allows the metal retaining ring 42 to be quickly welded to the connecting rod 12 or the spiral expander 11, improving assembly efficiency. At the same time, the welding wire can be inserted into the welding sleeve 42-2, which also improves the stability of the welding and thus improves the connection strength.

[0057] The upper end of the micro implant 41 protrudes from the maxillary surface of the maxillary solid model 20, and the micro implant 41 is provided with a step that cooperates with the elastic buckle 42-1. When the maxillary rapid expander is assembled on the maxillary solid model 20, the metal clasp 42 can be prevented from moving.

[0058] Spiral Amplifier Positioning Device

[0059] The spiral expander positioning device includes a positioning base 31 and a top cover 32 that are detachably snapped together. Figure 6 This diagram illustrates the positioning base 31 within the digital model of the maxilla in a 3D model. Figure 7 In order to be in Figure 6 A schematic diagram of the spiral amplifier 11 superimposed on the original structure. Figure 8 In order to be in Figure 7 A schematic diagram of the superimposed upper cover 32. Both the positioning base 31 and the upper cover 32 have positioning grooves on their mating surfaces that conform to the outer contour of the spiral expander 11. The positioning base 31 is integrally formed with the maxillary solid model 20. When the positioning base 31 and the upper cover 32 are fastened together, they clamp the spiral expander 11 in the middle, forming a sandwich clamping and positioning mechanism. To ensure the stability of the fastened assembly, the positioning base 31 and the upper cover 32 are provided with a snap-fit ​​structure to keep them relatively fixed after fastening. When the upper cover 32 is fastened onto the positioning base 31, the two are firmly joined, tightly clamping the spiral expander 11 in the middle and preventing displacement. Furthermore, after the maxillary rapid expander is assembled onto the maxillary solid model 20, the upper cover 32 can be removed to take out the maxillary rapid expander.

[0060] Furthermore, the fastening surfaces of the positioning base 31 and the top cover 32 are provided with positioning grooves that fit the outer contour of the spiral expander 11. After the positioning base 31 and the top cover 32 are fastened together, the outer contour of the spiral expander 11 fits the positioning grooves of the positioning base 31 and the top cover 32, eliminating the gap between the positioning base 31, the top cover 32 and the spiral expander 11, so that the spiral expander 11 and the sandwich-type auxiliary device 30 are firmly integrated into one unit. Since the positioning base 31 is integrally printed with the maxillary solid model 20, it means that after the positioning base 31 and the top cover 32 are fastened together, the position of the spiral expander 11 in the middle is equivalent to the installation position inside the patient's mouth.

[0061] The following is a further explanation of the manufacturing method of the maxillary rapid expander based on the auxiliary positioning device of the present invention:

[0062] Step S1: Obtain a digital 3D model of the patient's oral cavity. In this invention, the digital 3D model of the oral cavity is obtained by fitting a cone-beam computed tomography (CBCT) model and an intraoral scan / model scan model. The specific steps are: 1. Obtain data on the soft and hard tissues of the patient's oral cavity through an oral CBCT scan, and reconstruct the CBCT model in 3D; 2. Obtain 3D digital images of the patient's teeth and mucosal surface information through an intraoral 3D optical scan; 3. Accurately reconstruct the target tissue using the CBCT scan model combined with the 3D optical scan model. The final result is... Figure 1 The image shows a digital 3D model of the maxilla.

[0063] Step S2: Import the digital model of the implant clasp positioning device into the oral cavity digital 3D model, such as... Figure 2 As shown.

[0064] S3. Adjust the position of the micro-implant printing model 41 in the oral digital 3D model until the micro-implant is in the ideal implantation position, thereby determining the subsequent implantation position of the implant in the oral cavity.

[0065] S4. Based on the tooth contour of the digital 3D oral model and the micro-implant print model 41, design a positioning guide 50 in one orientation, such as... Figure 5 As shown. In the digital 3D model, the micro implant pin printed model 41 passes through the implant pin positioning hole 51 of the positioning guide plate 50.

[0066] S5. After fitting the digital models of the spiral expander 11 and the spiral expander positioning device, import them into the digital three-dimensional model of the oral cavity, and adjust the position of the spiral expander positioning device according to the position of the micro-implant printing model 41. For example, if the maxillary rapid expander is equipped with two implant holders, then the midline of the spiral expander positioning device is located on the central axis of the two micro-implant printing models 41 (e.g., Figure 7Among them, the fitted digital model of the spiral amplifier 11 and the spiral amplifier positioning device are inseparable. The fitted state of the spiral amplifier 11 and the digital model of the spiral amplifier positioning device is: the positioning base and the top cover tightly clamp the spiral amplifier 11 in the middle.

[0067] S6. Based on the digital 3D model of the oral cavity, design the bands 13 on both sides of the tooth contour, such as... Figure 9 As shown.

[0068] S7. Fit the digital model of the auxiliary positioning device with the digital three-dimensional model of the oral cavity, and use 3D printing technology to print the maxillary solid model 20 with the micro implant printing model 41 and the positioning base 31. The upper cover 32 and the positioning guide plate 50 are printed separately, and the metal clasp 42 is made of prefabricated metal parts.

[0069] S8. Install the spiral expander 11 into the positioning groove of the positioning base 31 and fasten the top cover 32 to clamp and fix the spiral expander 11, and fix the pre-made metal retaining ring 42 on the micro implant pin printing model 41.

[0070] S9, the fabricated metal band 13 is placed on both sides of the teeth of the maxillary solid model 20. The spiral expander 11 is fixedly connected to the band 13 on both sides via the connecting rod 12. The metal retainer 42 is welded to the connecting rod 12 or the spiral expander 11 to form a maxillary rapid expander. The metal retainer 42 serves as the implant holder. Figure 10 As shown.

[0071] S10. Remove the top cover 32 and take out the prepared maxillary rapid expander.

[0072] The intraoral installation process of the maxillary rapid expander is as follows:

[0073] 1) First, position and install the implant: First, put the positioning guide plate 50 into the patient's mouth. After the positioning guide plate 50 is in place, pass the micro implant through the implant positioning hole of the positioning guide plate 50 and install it in place.

[0074] 2) Intraoral fixation of the maxillary rapid expander: The assembled maxillary rapid expander is worn intraorally, and the metal clasp is fastened to the micro implant to complete the fixation of the maxillary rapid expander.

[0075] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. An auxiliary positioning device for rapid maxillary expansion assisted by micro-implants, comprising a spiral expander (11), a connecting rod (12), and a band (13), wherein the two sides of the spiral expander (11) are connected to the band (13) via the connecting rod (12), and an implant holder is fixedly connected to the spiral expander (11) or the connecting rod (12). The rapid maxillary expansion is assembled on a maxillary solid model (20) printed based on a digital three-dimensional model of the patient's oral cavity. The implant holder is connected to the implant clip of the implanted maxillary bone plate intraorally to fix the rapid maxillary expansion device. The device is characterized in that... The auxiliary positioning device includes a positioning guide plate (50) for planting nails in the positioning port, a nail holder positioning device, and a spiral expander (11) positioning device. The positioning guide (50) is temporarily installed in the mouth by clamping with multiple teeth and has positioning holes (51) for positioning the implant. The implant pin holder positioning device includes a micro implant pin printing model (41) and a metal clasp (42). The micro implant pin printing model (41) is integrally formed with the maxillary solid model (20) and protrudes from the maxillary surface of the maxillary solid model (20). The metal clasp (42) can be detachably fitted onto the micro implant pin printing model (41). The spiral expander positioning device includes a detachable positioning base (31) and a top cover (32) that are fastened together. The fastening surfaces of the positioning base (31) and the top cover (32) are provided with positioning grooves that fit the outer contour of the spiral expander (11). The positioning base (31) is integrally formed with the maxillary solid model (20). After installing the positioning guide plate (50) in the mouth and installing the implant nail in the mouth through the implant nail positioning hole (51), remove the positioning guide plate (50). The spiral expander (11) is installed on the positioning base (31) of the maxillary solid model (20) and the top cover (32) is fastened to clamp and fix the spiral expander (11). The spiral expander (11) is fixedly connected to the ring (13) on both sides by the connecting rod (12). The metal clasp (42) placed on the micro implant printing model (41) is welded to the connecting rod (12) or the spiral expander (11) to form a maxillary rapid expander. The metal clasp (42) serves as the implant holder.

2. The auxiliary positioning device for rapid maxillary expansion assisted by micro-implant as described in claim 1, characterized in that, The metal clasp (42) is provided with an elastic buckle (42-1) that is connected to the micro implant buckle, and the outer edge of the metal clasp (42) is provided with a welding sleeve (42-2). The welding sleeve (42-2) is welded to the connecting rod (12) or the spiral expander (11) by welding wire. One end of the welding wire passes through the welding sleeve (42-2) and is welded and fixedly connected to the welding sleeve (42-2).

3. The auxiliary positioning device for rapid maxillary expansion assisted by micro-implantation as described in claim 2, characterized in that, The micro implant print model (41) protrudes from the palate of the maxillary solid model (20), and the micro implant print model (41) has a step that cooperates with the elastic buckle (42-1).

4. The auxiliary positioning device for rapid maxillary expansion assisted by micro-implantation as described in claim 1, characterized in that, The positioning base (31) is detachably connected to the top cover (32) by a snap fastener.

5. The auxiliary positioning device for rapid maxillary expansion assisted by micro-implantation as described in claim 1, characterized in that, The positioning guide plate (50) includes a crown portion (52) that is fitted onto the tooth, an implant positioning seat (53) that is close to the maxillary palate, and a connecting portion (54) for connecting the crown portion (52) and the implant positioning seat (53). The crown portion (52), the implant positioning seat (53), and the connecting portion (54) are integrally formed, and the implant positioning hole (51) is provided on the implant positioning seat (53). The crown portion (52) consists of a first crown (52-1) fitted onto the incisor and a second crown (52-2) fitted onto the molars on both sides. The first crown (52-1) is separated from the second crown (52-2) on both sides. Both the first crown (52-1) and the second crown (52-2) are provided with observation holes (52-3).

6. A method for manufacturing a maxillary rapid expander based on the auxiliary positioning device according to any one of claims 1-5, characterized in that, The manufacturing method includes the following steps: S1. Obtain a digital 3D model of the patient's oral cavity; S2. Import the digital model of the micro implant stub print model (41) into the oral digital three-dimensional model; S3. Adjust the position of the digital model of the micro implant printing model (41) in the oral digital three-dimensional model to the ideal implantation position of the micro implant; S4. Based on the tooth contour of the digital three-dimensional model of the oral cavity and the orientation design of the micro implant printing model (41), the positioning guide (50) is designed. In the digital three-dimensional model, the micro implant printing model (41) passes through the implant positioning hole (51) of the positioning guide (50). S5. After fitting the digital models of the spiral expander (11) and the spiral expander positioning device, import them into the oral digital three-dimensional model, and adjust the position of the spiral expander positioning device according to the position of the micro implant printing model (41). S6. Design of bands on both sides of the tooth contour based on the digital three-dimensional model of the oral cavity (13). S7. Fit the digital model of the auxiliary positioning device with the digital three-dimensional model of the oral cavity, and use 3D printing technology to print a maxillary solid model (20) with a micro implant printing model (41) and a positioning base (31). The top cover (32) and the positioning guide plate (50) are printed separately. S8. Install the spiral expander (11) into the positioning groove of the positioning base (31) and fasten the top cover (32) to clamp and fix the spiral expander (11), and fix the pre-made metal retaining ring (42) on the micro implant pin printing model (41). S9, the fabricated band (13) is placed on the teeth on both sides of the maxillary solid model (20), the spiral expander (11) is fixedly connected to the band (13) on both sides by the connecting rod (12), and the metal clasp (42) is welded to the connecting rod (12) or the spiral expander (11) to form a maxillary rapid expander, with the metal clasp (42) serving as the implant holder; S10. Remove the top cover (32) and take off the prepared maxillary rapid expander.

7. The manufacturing method as described in claim 6, characterized in that, In step S1, after performing CBCT scanning and intraoral dental scanning, the CBCT scanning model is fitted to the intraoral dental scanning model to obtain a digital three-dimensional model of the patient's oral cavity.

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