Lingual device for orthodontic retention and periodontal fixation splint and method for making the same

Abstract

The present invention discloses a lingual device for orthodontic retention and periodontal fixation splint and a manufacturing method thereof; the maxillary part includes a first retaining part and a pair of first guiding parts, the first retaining part is used to fit the lingual side of the crown of the maxillary anterior teeth and the maxillary canines and the maxillary first molars on both sides of the maxillary anterior teeth, one end of each first guiding part is connected to the first molar of the maxillary on one side of the first retaining part, and the other end extends along the crown of the maxillary first molar to the occlusal surface of the maxillary first molar; the mandibular part includes a second retaining part and a pair of second guiding parts, the second retaining part is used to fit the lingual side of the crown of the mandibular anterior teeth and the mandibular canines and the mandibular first molars on both sides of the mandibular anterior teeth, one end of each second guiding part is connected to the first molar of the mandibular on one side of the second retaining part, and the other end extends along the crown of the mandibular first molar to the occlusal surface of the mandibular first molar. The lingual device of this scheme is convenient for oral hygiene maintenance and clinical precise positioning and bonding.

Description

Technical Field

[0001] The present invention belongs to the field of medical technology, and more specifically, relates to a lingual device for orthodontic retention and periodontal fixation splints and a manufacturing method thereof. Background Art

[0002] After orthodontic treatment, there is a tendency for recurrence due to periodontal tissue reconstruction, soft tissue effects, and growth and development factors. In order to maintain a good correction effect, it is usually necessary to wear a retainer after the treatment. Common retainer types are divided into removable retainers and fixed retainers. Among them, fixed retainers are mainly lingual retainers, which have good aesthetics, are independent of patient cooperation, and can effectively prevent anterior tooth crowding and recurrence of tooth extraction gaps. In addition, lingual retainers can also act as periodontal splints for orthodontic patients with periodontitis. However, existing lingual retainers have problems such as being unfavorable to oral hygiene, complicated bending processes, clinical placement relying on doctor experience, and easy to fall off.

[0003] Therefore, we look forward to developing a lingual device and manufacturing method for orthodontic retention and periodontal fixation splints that has a simple structure, strong bonding strength, and is easy to use clinically, so as to increase the ability of teeth to withstand occlusal forces and further improve patient comfort, treatment effects, and prognosis. Summary of the invention

[0004] The purpose of the present invention is to provide a lingual device for orthodontic retention and periodontal fixation splint and a manufacturing method thereof, which is convenient for oral hygiene maintenance and clinical precise positioning and bonding, while increasing the bonding area, improving the bonding strength, optimizing the stability of the device in the mouth, and improving the patient's comfort. It has a simple structure and is convenient for clinical use.

[0005] In order to achieve the above-mentioned object, the present invention provides a lingual device for orthodontic retention and periodontal fixation splint, comprising: an upper jaw portion and a lower jaw portion;

[0006] The maxillary portion includes a first retaining portion and a pair of first guiding portions, wherein the first retaining portion is used to fit the lingual side of the crowns of the maxillary anterior teeth and the maxillary canines and the maxillary first molars on both sides of the maxillary anterior teeth, and one end of each of the first guiding portions is connected to a side of the first retaining portion close to the maxillary first molar, and the other end extends along the crown of the maxillary first molar to the occlusal surface of the maxillary first molar;

[0007] The mandibular portion includes a second retaining portion and a pair of second guiding portions, the second retaining portion being used to fit the lingual side of the crowns of the mandibular anterior teeth and the mandibular canines and mandibular first molars on both sides of the mandibular anterior teeth, one end of each second guiding portion being connected to one side of the second retaining portion close to the mandibular first molar, and the other end extending along the crown of the mandibular first molar to the occlusal surface of the mandibular first molar.

[0008] Optionally, the transverse cross-sections of the first retaining portion and the second retaining portion are both semicircular, including a straight side and an arc side, the straight side is used to fit with the tooth crown, and the arc side faces the tongue side;

[0009] The straight side surfaces of the first retaining portion and the second retaining portion are granular, and the arc side surfaces are smooth.

[0010] Optionally, one end of each first guide portion is connected to the mesial part of the maxillary first molar on one side of the first retention portion, and the other end extends along the central groove of the occlusal surface of the maxillary first molar to the distal fossa of the occlusal surface of the maxillary first molar.

[0011] Optionally, one end of each first guide portion is connected to the lingual side of the maxillary first molar on one side of the first retention portion, and the other end extends along the crown of the maxillary first molar to the central groove of the occlusal surface of the maxillary first molar.

[0012] Optionally, one end of each second guide portion is connected to the lingual side of the mandibular first molar on one side of the second retention portion, and the other end extends along the crown of the mandibular first molar to the central groove of the occlusal surface of the mandibular first molar.

[0013] Optionally, the first retaining portion is integrally formed with the pair of first guide portions, and the second retaining portion is integrally formed with the pair of second guide portions.

[0014] Optionally, the first retaining portion and the second retaining portion have a width of 0.8-1.2 mm and a thickness of 0.4 mm-1.0 mm.

[0015] Optionally, the width of the first guide portion at the connection with the first retaining portion is 0.4 mm to 0.6 mm, and the thickness is 0.4 mm to 0.6 mm, and the thickness of the second guide portion is the same as that of the second retaining portion.

[0016] Optionally, the upper jaw and the lower jaw are made of alloy.

[0017] The present invention also provides a manufacturing method for manufacturing the above-mentioned lingual device for orthodontic retention and periodontal fixation splint, the manufacturing method comprising the following steps:

[0018] 1) Obtaining scan data of the patient's oral cavity or oral cavity model;

[0019] 2) establishing a virtual dental model including the crowns of the upper and lower teeth and the occlusal relationship of the patient according to the scan data;

[0020] 3) establishing virtual models of the upper jaw and the lower jaw respectively on the dental model according to the shape of the dental arch;

[0021] 4) outputting three-dimensional image data of the virtual models of the maxillary part and the mandibular part, and obtaining the maxillary part and the mandibular part according to the three-dimensional image data;

[0022] 5) Polishing and grinding the upper jaw and the lower jaw to make the surfaces exposed in the patient's oral cavity delicate and smooth.

[0023] Optionally, the step 2) includes:

[0024] The scanned data is input into medical image processing and three-dimensional design software to establish a virtual dental model including the crowns of the patient's upper and lower teeth and the occlusal relationship.

[0025] Optionally, the step 3) includes:

[0026] 3.1) According to the shape of the maxillary dental arch, a virtual model of the first retention part is established on the lingual side of the maxillary crown;

[0027] 3.2) establishing a pair of virtual models of the first guide parts on the virtual model of the first retention part to form the maxillary part;

[0028] 3.3) According to the shape of the mandibular dental arch, a virtual model of the second retention part is established on the lingual side of the mandibular crown;

[0029] 3.4) Building a pair of virtual models of the second guide parts on the virtual model of the second retention part to form the mandibular part.

[0030] Optionally, the step 4) includes:

[0031] 4.1) Outputting the three-dimensional image data of the virtual models of the maxillary part and the mandibular part in STL format;

[0032] 4.2) inputting the three-dimensional image data into a 3D printer;

[0033] 4.3) Printing the upper jaw and the lower jaw by using the 3D printer.

[0034] Optionally, the step 5) includes:

[0035] 5.1) polishing the upper jaw and the lower jaw with 320, 600, 800 and 1000 sandpapers in sequence;

[0036] 5.2) Polishing is performed using woolen cloth and aluminum oxide aqueous suspension.

[0037] The beneficial effects of the present invention are as follows: when in use, the maxillary part and the mandibular part are placed on the dental arch according to the positioning of the first guide part and the second guide part respectively, and the maxillary part is removed after marking the lingual side of the teeth on the root side of the maxillary part with a fluid resin, and the first guide part is removed with a bur and repositioned according to the marked position, and finally the maxillary part and the mandibular part are fixed on the corresponding dental arch with a light-curing resin to achieve precise positioning and reduce the difficulty of bonding. The present invention is conducive to clinical precise positioning bonding and oral hygiene maintenance, and at the same time adopts a personalized design to match the patient's crown, increase the bonding area, improve the bonding strength, and optimize the stability of the device in the mouth; and the structure is simple, which improves the patient's comfort and is convenient for clinical use.

[0038] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0040] Figure 1 A schematic structural diagram of a lingual device for orthodontic retention and periodontal fixation splint according to an embodiment of the present invention is shown.

[0041] Figure 2 A schematic structural diagram of a lingual device for orthodontic retention and periodontal fixation splint according to another embodiment of the present invention is shown.

[0042] Description of Reference Numerals

[0043] 1. First retaining portion; 2. First guiding portion; 3. Second retaining portion; 4. Second guiding portion. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0045] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] The present invention discloses a lingual device for orthodontic retention and periodontal fixation splint, comprising: an upper jaw portion and a lower jaw portion;

[0047] The maxillary portion includes a first retaining portion and a pair of first guiding portions, the first retaining portion is used to fit the lingual side of the crowns of the maxillary anterior teeth and the maxillary canines and the maxillary first molars on both sides of the maxillary anterior teeth, one end of each first guiding portion is connected to a side of the first retaining portion close to the maxillary first molar, and the other end extends along the crown of the maxillary first molar to the occlusal surface of the maxillary first molar;

[0048] The mandibular part includes a second retention part and a pair of second guide parts. The second retention part is used to fit the lingual side of the crowns of the mandibular anterior teeth and the mandibular canines and mandibular first molars on both sides of the mandibular anterior teeth. One end of each second guide part is connected to one side of the second retention part close to the mandibular first molar, and the other end extends along the crown of the mandibular first molar to the occlusal surface of the mandibular first molar.

[0049] Specifically, when in use, the maxillary part and the mandibular part are placed on the dental arch according to the positioning of the first guide part and the second guide part, respectively, and the maxillary part is removed after marking the lingual side of the teeth on the root side of the maxillary part with a fluid resin, and the first guide part is removed with a bur and positioned again according to the marked position, and finally the maxillary part and the mandibular part are fixed on the corresponding dental arch with a light-curing resin to achieve precise positioning and reduce the difficulty of bonding. The present invention is conducive to clinical precise positioning bonding and oral hygiene maintenance, and at the same time adopts a personalized design to match the patient's crown, increase the bonding area, improve the bonding strength, optimize the stability of the device in the mouth, and has a simple structure, which improves the patient's comfort and is convenient for clinical use.

[0050] Furthermore, the first retaining portion and the second retaining portion are both arranged across the spaces between the teeth, thereby avoiding blockage of the inter-tooth overflow channel.

[0051] As an optional solution, the transverse cross-sections of the first retention portion and the second retention portion are both semicircular, including a straight side and an arc side, the straight side is used to fit the crown, and the arc side faces the tongue side;

[0052] The straight side surfaces of the first retaining portion and the second retaining portion are granular, and the arc side surfaces are smooth.

[0053] Specifically, the above-mentioned transverse cross section refers to a cross section perpendicular to the length direction of the first retaining portion (or the second retaining portion).

[0054] Furthermore, one side surface of the first retention part and the second retention part is designed to be flat and have particles, which can cooperate with the resin to fit tightly on the lingual side of the crown, and the other side surface is designed to be arc-shaped and smooth, which is easy to clean.

[0055] As an optional solution, one end of each first guide portion is connected to the mesial part of the maxillary first molar on one side of the first retention portion, and the other end extends along the central groove of the occlusal surface of the maxillary first molar to the distal fossa of the occlusal surface of the maxillary first molar.

[0056] As an optional solution, one end of each first guide portion is connected to the lingual side of the maxillary first molar on one side of the first retention portion, and the other end extends along the crown of the maxillary first molar to the central groove of the occlusal surface of the maxillary first molar.

[0057] Specifically, when one end of the first guide portion is connected to the lingual side of the maxillary first molar on one side of the first retention portion, the connection point is located at the lingual side of the maxillary first molar at a position one-third of the distance from the maxillary first molar to the distal end.

[0058] Furthermore, the above two configurations of the first guide portion can both quickly achieve accurate positioning, and can be flexibly selected according to the patient's crown shape and oral condition during specific use.

[0059] As an optional solution, one end of each second guide portion is connected to the lingual side of the mandibular first molar on one side of the second retention portion, and the other end extends along the crown of the mandibular first molar to the central groove of the occlusal surface of the mandibular first molar.

[0060] Specifically, the central groove extending to the occlusal surface of the mandibular first molar does not affect the occlusion and can also play a positioning role.

[0061] As an optional solution, the first retaining portion is integrally formed with the pair of first guiding portions, and the second retaining portion is integrally formed with the pair of second guiding portions.

[0062] Specifically, the lingual device of the present solution is designed by computer based on the patient's dental arch data and then integrally formed through 3D printing technology. It is highly consistent with the shape of the patient's dental arch, further improving the intraoral stability.

[0063] As an optional solution, the first retaining portion and the second retaining portion have a width of 0.8 mm to 1.2 mm and a thickness of 0.4 mm to 1.0 mm.

[0064] Specifically, the above-mentioned width refers to the distance between the edge of the first retention part (or the second retention part) close to the root side and the edge close to the occlusal surface side, and the thickness refers to the distance between the lingual surface of the first retention part (or the second retention part) and the crown side surface.

[0065] When the lingual device of the present solution is used as an orthodontic retainer, the thickness of the first retaining portion and the second retaining portion is 0.4mm to 0.7mm; when the lingual device of the present solution is used as a periodontal fixation splint, the thickness of the first retaining portion and the second retaining portion is 0.6mm to 1.0mm.

[0066] As an optional solution, the width of the first guide portion at the connection with the first retaining portion is 0.4 mm to 0.6 mm, the thickness is 0.4 mm to 0.6 mm, and the thickness of the second guide portion is the same as that of the second retaining portion.

[0067] Specifically, since the first guide part needs to be ground off during use, the thickness should not be too large to avoid wasting more time on grinding off. Since the second guide part is always connected to the teeth during use, it must have a certain strength and is therefore set to be the same thickness as the second retaining part.

[0068] As an option, the upper jaw part and the lower jaw part are made of alloy.

[0069] The present invention also discloses a manufacturing method for manufacturing the above-mentioned lingual device for orthodontic retention and periodontal fixation splint, comprising the following steps:

[0070] 1) Obtaining scan data of the patient's oral cavity or oral cavity model;

[0071] 2) Establish a virtual dental model including the patient's upper and lower tooth crowns and occlusal relationship based on the scan data;

[0072] 3) Building virtual models of the maxillary and mandibular parts on the dental model according to the shape of the dental arch;

[0073] 4) outputting three-dimensional image data of the virtual models of the maxillary and mandibular parts, and obtaining the maxillary and mandibular parts according to the three-dimensional image data;

[0074] 5) Polish and grind the maxillary and mandibular parts to make the surfaces exposed in the patient's mouth delicate and smooth.

[0075] Specifically, the lingual device made by this method can be highly compatible with the patient's dental arch, improve the patient's comfort, reduce the difficulty of bonding, and is conducive to clinical precise positioning of bonding, increasing the bonding area, improving the bonding strength, and optimizing the stability of the device in the mouth.

[0076] Furthermore, intraoral direct scanning or model scanning is used to obtain scanning data, which reduces the number of processes and is fast and accurate.

[0077] As an option, step 2) includes:

[0078] The scan data is input into medical image processing and 3D design software to create a virtual jaw model containing the patient's upper and lower tooth crowns and occlusal relationship.

[0079] As an option, step 3) includes:

[0080] 3.1) According to the shape of the maxillary dental arch, a virtual model of the first retention part is established on the lingual side of the maxillary crown;

[0081] 3.2) establishing a pair of virtual models of the first guide parts on the virtual model of the first retention part to form the maxillary part;

[0082] 3.3) According to the shape of the mandibular dental arch, a virtual model of the second retention part is established on the lingual side of the mandibular crown;

[0083] 3.4) Building a pair of virtual models of the second guide parts on the virtual model of the second retention part to form the mandibular part.

[0084] As an option, step 4) includes:

[0085] 4.1) Output the three-dimensional image data of the maxillary and mandibular virtual models in STL format;

[0086] 4.2) Inputting the three-dimensional image data into the 3D printer;

[0087] 4.3) Print the upper and lower jaws using a 3D printer.

[0088] Specifically, selective laser cladding technology or other 3D printing technology is used.

[0089] As an option, step 5) includes:

[0090] 5.1) Use 320, 600, 800, and 1000 sandpaper to polish the upper and lower jaws in turn;

[0091] 5.2) Polishing is performed using woolen cloth and aluminum oxide aqueous suspension.

[0092] Example 1

[0093] Figure 1 A schematic structural diagram of a lingual device for orthodontic retention and periodontal fixation splint according to this embodiment is shown.

[0094] like Figure 1 As shown, the lingual device for orthodontic retention and periodontal fixation splint is made of alloy and includes:

[0095] The maxillary part includes an integrally formed first retention part 1 and a pair of first guide parts 2. The first retention part 1 is attached to the maxillary anterior teeth and the maxillary canines and the lingual side of the crowns of the maxillary first molars on both sides of the maxillary anterior teeth. One end of each first guide part 2 is connected to the mesial part of the maxillary first molar on one side of the first retention part 1, and the other end extends along the central groove of the occlusal surface of the maxillary first molar to the distal fossa of the occlusal surface of the maxillary first molar.

[0096] The mandibular part includes an integrally formed second retention part 3 and a pair of second guide parts 4. The second retention part 3 is attached to the lingual side of the crowns of the mandibular incisors and the mandibular canines and mandibular first molars on both sides of the mandibular incisors. One end of each second guide part 4 is connected to the lingual side of the mandibular first molar on one side of the second retention part 3, and the other end extends along the crown of the mandibular first molar to the central groove of the occlusal surface of the mandibular first molar.

[0097] The transverse cross-sections of the first retaining portion 1 and the second retaining portion 3 are both semicircular, including a straight side and an arc side. The straight side surfaces of the first retaining portion 1 and the second retaining portion 3 are granular and are used to fit the crown. The arc side surfaces are smooth and face the lingual side.

[0098] Among them, the width of the first retention part 1 and the second retention part 3 is 1mm, the thickness is 0.4mm~0.7mm when used as an orthodontic retainer, and the thickness is 0.6mm~1.0mm when used as a periodontal fixation splint. The width of the first guide part 2 at the connection with the first retention part 1 is 0.5mm, and the thickness is 0.5mm. The second guide part 4 has the same thickness as the second retention part 3.

[0099] When in use, place the maxillary part and the mandibular part on the dental arch according to the positioning of the first guide part and the second guide part respectively, without bonding first. After placement, use fluid resin to make 2 to 4 positioning buttons as positioning marks on the gingival side of the first retention part, take out the maxillary part, use a bur to remove the first guide part, and then position it again according to the marked position. Finally, use light-curing resin to retain the maxillary and mandibular parts on the corresponding dental arches to achieve precise positioning and reduce the difficulty of bonding.

[0100] The method for making a lingual device for orthodontic retention and periodontal fixation splint comprises the following steps:

[0101] 1) Obtaining scan data of the patient's oral cavity or oral cavity model;

[0102] 2) Input the scan data into medical image processing and 3D design software (3shape-ApplianceDesigner) to create a virtual dental model including the patient's upper and lower tooth crowns and occlusal relationship;

[0103] 3) According to the shape of the maxillary dental arch, a virtual model of the first retention part is established on the lingual side of the maxillary crown;

[0104] 4) establishing a pair of virtual models of the first guide parts on the virtual model of the first retention part to form the maxillary part;

[0105] 5) According to the shape of the mandibular dental arch, a virtual model of the second retention part is established on the lingual side of the mandibular crown;

[0106] 6) establishing a pair of virtual models of the second guide parts on the virtual model of the second retention part to form the mandibular part;

[0107] 7) Outputting the three-dimensional image data of the maxillary and mandibular virtual models in STL format;

[0108] 8) Inputting the three-dimensional image data into the 3D printer;

[0109] 9) Printing the upper and lower jaws by 3D printer;

[0110] 10) Use 320, 600, 800, and 1000 sandpaper to polish the lingual side of the maxillary and mandibular parts;

[0111] 11) Use woolen cloth and aluminum oxide aqueous suspension to polish the polished area.

[0112] If the lingual device is lost, it can be remade following the above steps.

[0113] Through personalized design, the addition of guide parts and improvement of surface roughness, the lingual device is more conducive to oral hygiene maintenance and clinical precise positioning and bonding; at the same time, personalized design is used to increase the bonding area, improve the bonding strength, and optimize the stability of the device in the mouth; the structure is simple, the patient comfort is good and it is easy to use in clinical practice.

[0114] Example 2

[0115] Figure 2 A schematic structural diagram of a lingual device for orthodontic retention and periodontal fixation splint according to this embodiment is shown.

[0116] like Figure 2 As shown, the difference between this embodiment and embodiment 1 is that one end of each first guide portion 2 is connected to the lingual side of the maxillary first molar on one side of the first retention portion 1, and the other end extends along the crown of the maxillary first molar to the central groove of the occlusal surface of the maxillary first molar.

[0117] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A lingual device for orthodontic retention and periodontal fixation splint, characterized in that: include: maxillary and mandibular parts; The maxillary portion includes a first retaining portion and a pair of first guiding portions, wherein the first retaining portion is used to fit the lingual side of the crowns of the maxillary anterior teeth and the maxillary canines and the maxillary first molars on both sides of the maxillary anterior teeth, and one end of each of the first guiding portions is connected to a side of the first retaining portion close to the maxillary first molar, and the other end extends along the crown of the maxillary first molar to the occlusal surface of the maxillary first molar; The mandibular portion includes a second retaining portion and a pair of second guiding portions, wherein the second retaining portion is used to fit the lingual side of the crowns of the mandibular anterior teeth and the mandibular canines and the mandibular first molars on both sides of the mandibular anterior teeth, and one end of each second guiding portion is connected to a side of the second retaining portion close to the mandibular first molar, and the other end extends along the crown of the mandibular first molar to the occlusal surface of the mandibular first molar; The transverse cross-sections of the first retaining portion and the second retaining portion are both semicircular, including a straight side and an arc side, the straight side is used to fit with the crown, and the arc side faces the tongue side; The straight side surfaces of the first retaining portion and the second retaining portion are granular, and the arc side surfaces are smooth; One end of each of the first guide portions is connected to the mesial portion of the maxillary first molar on one side of the first retention portion, and the other end extends along the central groove of the occlusal surface of the maxillary first molar to the distal fossa of the occlusal surface of the maxillary first molar; One end of each second guide portion is connected to the lingual side of the mandibular first molar on one side of the second retention portion, and the other end extends along the crown of the mandibular first molar to the central groove of the occlusal surface of the mandibular first molar.

2. The lingual device for orthodontic retention and periodontal fixation splint according to claim 1, characterized in that: One end of each first guide portion is connected to the lingual side of the maxillary first molar on one side of the first retention portion, and the other end extends along the crown of the maxillary first molar to the central groove of the occlusal surface of the maxillary first molar.

3. A manufacturing method for manufacturing a lingual device for orthodontic retention and periodontal fixation splint according to any one of claims 1 to 2, characterized in that: The production method comprises the following steps: 1) Obtaining scan data of the patient's oral cavity or oral cavity model; 2) establishing a virtual dental model including the upper and lower tooth crowns and occlusal relationship of the patient according to the scan data; 3) establishing virtual models of the upper jaw and the lower jaw respectively on the dental model according to the shape of the dental arch; 4) outputting three-dimensional image data of the virtual models of the maxillary part and the mandibular part, and obtaining the maxillary part and the mandibular part according to the three-dimensional image data; 5) Polishing and grinding the upper jaw and the lower jaw to make the surfaces exposed in the patient's oral cavity delicate and smooth.

4. The method according to claim 3, characterized in that: The step 2) comprises: The scanned data is input into medical image processing and three-dimensional design software to create a virtual dental model including the crowns of the patient's upper and lower teeth and the occlusal relationship.

5. The manufacturing method according to claim 3, characterized in that: The step 3) comprises: 3.1) According to the shape of the maxillary dental arch, a virtual model of the first retention part is established on the lingual side of the maxillary crown; 3.2) establishing a pair of virtual models of the first guide parts on the virtual model of the first retention part to form the maxillary part; 3.3) Building a virtual model of the second retention part on the lingual side of the mandibular crown according to the shape of the mandibular dental arch; 3.4) Building a pair of virtual models of the second guide parts on the virtual model of the second retention part to form the mandibular part.

6. The method according to claim 3, characterized in that: The step 4) comprises: 4.1) Outputting the three-dimensional image data of the virtual models of the maxillary part and the mandibular part in STL format; 4.2) inputting the three-dimensional image data into a 3D printer; 4.3) Printing the upper jaw and the lower jaw by means of the 3D printer.

7. The manufacturing method according to claim 3, characterized in that: The step 5) comprises: 5.1) polishing the upper jaw and the lower jaw with 320, 600, 800 and 1000 sandpapers in sequence; 5.2) Polishing is performed using woolen cloth and aluminum oxide aqueous suspension.

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