Bow expander and use method thereof

Abstract

The invention relates to an arch expander and a use method, and relates to the technical field of orthodontics. An arch expanding device comprises two symmetrically-arranged palate base plates, and each palate base plate comprises a front palate base plate and a rear palate base plate which are arranged front and back; spiral distance adjusting assemblies are connected between the front palate part base plates of the two upper palate part base plates and between the rear palate part base plates of the two upper palate part base plates; a hyperbolic labial arch clamping ring is connected to the front palate part base plate of the two upper palate part base plates, and clamping rings are arranged on the rear palate part base plates of the two upper palate part base plates respectively; one side surface, far away from the upper jaw, of each upper palate part base is provided with an angle expansion triangular bracket capable of applying force to the front palate part base. The using method of the arch expanding device is used for the arch expanding device. According to the arch expanding device and the using method, adaptive adjustment can be carried out according to the radians of the upper jaws of different patients, force can be continuously and stably applied to the upper jaw bone when the arch expanding device is used, reformation of the upper jaw bone tissue is promoted, and the effects of arch expanding and surface shape improving are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of oral orthodontics, and in particular relates to a self-expander and a use method thereof. Background Art

[0002] Arch expanders, also known as dental arch expansion spirals, are generally composed of a retaining clasp, a hyperbolic labial arch, and a base. They are used to treat facial collapse caused by insufficient maxillary development, deep nasolabial grooves, bony crossbites, bony partial crossbites, and dental crossbites caused by the temporomandibular joint. Arch expanders use orthopedic force to widen the width of the jaw, the width and length of the dental arch to improve facial soft and hard tissue defects, and are therefore widely used.

[0003] The inventor has found through research that the curvature of the upper jaw of different patients is slightly different. At present, in the actual use of the expander, the palate base model is relatively fixed and is generally adjusted by changing the left and right position. There is a lack of an expander that can be adjusted according to the curvature of the upper jaw of different patients, and the maxillary bone cannot be continuously and stably applied during the expansion, making it difficult to achieve the effect of changing the defects of facial soft and hard tissues. Summary of the invention

[0004] We hope to provide an expander that can be adjusted according to the curvature of the maxilla of different patients, and can continuously and stably apply force to the maxilla during use, thereby promoting the re-formation of maxillary tissue, so as to achieve the effect of expanding the arch and improving the facial shape.

[0005] In a first aspect, the present application provides an expander, which adopts the following technical solution: An expander, comprising two symmetrically arranged upper palate bases, each of the upper palate bases comprising an anterior palate base and a posterior palate base arranged front and back; A spiral pitch adjustment component is connected between the front palate bases of the two upper palate bases and between the back palate bases of the two upper palate bases; The front palate bases of the two upper palate bases are connected with a hyperbolic lip bow clasp, and the rear palate bases of the two upper palate bases are respectively provided with clasps; A side of each upper palate base away from the upper palate is provided with an angle expansion triangular bracket capable of adding force to the front palate base.

[0006] By adopting the above technical solution, the expander is first placed in the upper jaw of the patient, and the hyperbolic lip arch clasps set on the two anterior palatal bases are placed between the upper lip and the front incisors and lateral incisors to block the force of the lips on the upper dental arch. The clasps on the two posterior palatal bases are respectively buckled on the two molars on both sides. The distance between the two anterior palatal bases and the distance between the two posterior palatal bases are adjusted using a spiral distance adjustment component, and the angle of the anterior palatal base and the posterior palatal base are adjusted using an angle expansion triangle bracket to make the expander conform to the current shape of the patient's upper jaw. Then, the expander is taken out of the patient's mouth and one end of the angle expansion triangle bracket is fixed to the posterior palatal base.

[0007] Every day after wearing it or at certain intervals, the distance between the two anterior palatal bases and the distance between the two posterior palatal bases can be adjusted using the spiral distance adjustment component according to the daily expansion degree of the upper dental arch. At the same time, according to the lifting degree of the upper jaw, the angle expansion triangle bracket is adjusted so that the upper palate base can continuously apply upward force to the upper jaw. The patient can wear the expander at night or when it is convenient, and can take it off when eating. The clasp can be removed to complete the removal.

[0008] Optionally, each of the angle expansion triangular brackets comprises a threaded rod, a first support rod and a second support rod; One end of the two support rods is fixed together and fixedly connected to the first universal ball, the other ends of the two support rods are arranged at an angle, the threaded rod is threadedly connected in sequence and passes through the first support rod and the second support rod, and the end of the threaded rod is provided with a second universal ball; The first universal ball is connected to the rear palate base, and the second universal ball is connected to the front palate base.

[0009] By adopting the above technical solution, the curvature of the upper jaw of different patients is different. Before installing the expander for the patient, the expander is first adjusted according to the patient's upper jaw. Specifically, the expander is first placed in the patient's upper jaw, the rear palate base is rotated with the first universal ball as the center of the ball, and the front palate base is rotated with the second universal ball as the center of the ball. After adjusting in place, the first universal ball and the rear palate base are fixed. The second universal ball and the front palate base can be fixed after trying it again. Since the front palate base is limited by the curvature of the upper jaw and the lips act on the hyperbolic lip bow clamp, the second universal ball and the front palate base can also be not fixed. The threaded rod can be rotatably connected with the second universal ball, and two or one threaded rod can be rotated in a targeted manner to hold two or one front palate base upwards, so that the position of the maxillary underdevelopment can be targeted to apply force, and the maxillary bone can be lifted. Two angle expansion triangle brackets are set, and force can be applied in a targeted manner according to the slightly different positions of the maxilla on both sides.

[0010] Optionally, the spiral pitch adjustment assembly includes a bidirectional lead screw, an adjustment block fixed in the middle of the bidirectional lead screw, and a guide rod arranged on one side of the bidirectional lead screw; The front palate bases of the two upper palate bases are respectively threadedly connected to the two ends of the bidirectional lead screw, and the front palate bases of the two upper palate bases are respectively slidably connected to the two ends of the guide rod; The rear palate bases of the two upper palate bases are respectively threadedly connected to the two ends of the bidirectional lead screw, and the rear palate bases of the two upper palate bases are respectively slidably connected to the two ends of the guide rod.

[0011] By adopting the above technical solution, the adjusting block is driven to rotate, and the bidirectional screw rotates with the adjusting block, thereby making the two front palatal bases approach or move away from each other, and / or making the two rear palatal bases approach or move away from each other.

[0012] Optionally, the two edges of the upper palate base that diverge from each other form a curved arc that matches the upper teeth.

[0013] By adopting the above technical solution, the edge of the upper palate base forms a certain curvature, which can form a position match between the upper teeth, which is conducive to the positioning of the upper palate base. In addition, since the setting of the upper palate base will make the tongue feel foreign, the edge is located between the upper teeth and the lower pressure, which can increase the space distance between the upper and lower jaws and reduce the discomfort of wearing.

[0014] Optionally, a side expansion component is symmetrically provided on one side of the posterior palatal base toward the lower dental arch, and the side expansion component is located on the inner side of the edge, and the lower teeth can drive the side expansion component to squeeze the posterior palatal base outward.

[0015] By adopting the above technical solution, when the lower teeth and upper teeth are occluding, especially when the lower molars are occluding the upper molars, the normal lower molars will generate a force on the upper molars. In this application, a lateral expansion component is set up and the lower molars act on the lateral expansion component, so that the lateral expansion component generates an outward expansion force on the posterior palatal base, thereby achieving the effect of expanding the arch by continuously applying force to one side.

[0016] Optionally, the side expansion component includes a first main expansion ear and a first auxiliary expansion ear respectively arranged on the inner and outer sides of the edge, a first rotating blade is arranged between the first main expansion ear and the first auxiliary expansion ear and on the side away from the edge, one side of the first rotating blade is rotatably connected to the posterior palate base, and a first driving plate is arranged on the side of the first rotating blade facing the lower teeth.

[0017] By adopting the above technical solution, when the upper and lower molars are occluded, the lower molar acts on the first driving plate and causes it to rotate at a certain angle, the first driving plate drives the first rotary plate to rotate, one end of the first rotary plate drives the first main expanded ear to elastically deform toward the upper dental arch side, and the first main expanded ear presses the posterior palate base toward the outer side of the upper dental arch. The other end of the first rotary plate drives the first auxiliary expanded ear to elastically deform toward the upper dental arch side, and the first auxiliary expanded ear presses the upper dental arch upward or outward, driving the maxillary bone to expand or lift outward.

[0018] Optionally, the first driving plate is arranged in an arc shape on the side facing the lower teeth.

[0019] By adopting the above technical solution, the arc-shaped first driving plate and the tooth surface of the lower molar are more matched, and it is less likely to cause discomfort.

[0020] Optionally, the side expansion assembly comprises a second main expansion ear and a second auxiliary expansion ear respectively arranged on the inner side and the outer side of the edge, the second main expansion ear and the second auxiliary expansion ear are rotatably connected to one side close to the edge, an arc plate supporting the second auxiliary expansion ear is arranged on the edge, and an elastic member is connected between the second main expansion ear and the second auxiliary expansion ear; A second rotating blade is arranged between the second main ear expansion and the second auxiliary ear expansion and on a side away from the edge. One side of the second rotating blade is rotatably connected to the rear palate base. A second driving plate is arranged on the side of the second rotating blade facing the lower teeth.

[0021] By adopting the above technical solution, when the upper and lower molars are not occluding, the elastic member presses against the second main ear expansion, and the second main ear expansion presses against the posterior palate base toward the outer side of the upper dental arch. When the upper and lower molars are occluding, the lower molar acts on the second drive plate and causes it to rotate at a certain angle, and the second drive plate drives the second rotary plate to rotate, overcoming the elastic force of the elastic member. One end of the second rotary plate drives the second main ear expansion to elastically deform toward the upper dental arch, and the second main ear expansion presses the posterior palate base toward the outer side of the upper dental arch. The other end of the second rotary plate drives the second auxiliary ear expansion to elastically deform toward the upper dental arch, and the second auxiliary ear expansion presses the upper dental arch upward or outward, driving the maxillary bone to expand or lift outward.

[0022] Optionally, the second driving plate is arranged in an arc shape on the side facing the lower teeth.

[0023] By adopting the above technical solution, the arc-shaped second driving plate is more matched with the tooth surface of the lower molar, and is less likely to cause discomfort.

[0024] In a second aspect, the present application provides a method for using an expander, which is used for the aforementioned expander and adopts the following technical solution: An expander for the above expander, comprising the steps of: Place the palatal base into the upper jaw of the patient, and place the hyperbolic lip bow clasp between the upper lip and the front incisors. The clasp is placed on the outside of the two molars on both sides. Use the screw distance adjustment assembly to adjust the distance between the two front palatal bases and the distance between the two rear palatal bases respectively; The back palate base is rotated with the first universal ball as the center, and the front palate base is rotated with the second universal ball as the center. After being adjusted into place, the first universal ball and the back palate base are fixed, and the second universal ball and the front palate base are fixed; The threaded rod is rotated to push upward to hold the anterior palatal base.

[0025] By adopting the above technical solution, the setting of the universal ball allows the positions of the anterior palate base and the posterior palate base to be pre-adjusted according to the curvature of the upper jaw of different patients, and then the expander can be taken out of the patient's mouth, and the first universal ball is fixed first. Then the expander is placed in the patient's mouth and the position of the posterior palate base is adjusted again, and then the second universal ball is fixed. The expander with the adjusted position is placed in the patient's mouth again, and the threaded rod is rotated to hold the anterior palate base upward, so that the position of the maxillary bone underdeveloped can be targeted for force.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: Wearing the expander, the position of the anterior palate base and the posterior palate base can be adjusted through the universal ball to adapt to the curvature of the upper jaw of different patients. The angle of the expander triangle bracket can be adjusted to maintain a continuous and stable force on the maxillary bone, promote the re-formation of the maxillary bone tissue, so as to achieve the effect of expanding the arch and improving the face shape. Compared with the previous spiral expander, the expander has the advantage of being able to apply force to the position of insufficient bone development. According to the principle of Wolff's law, the alveolar bone of the upper teeth can change according to the different force directions under the action of the bite force, and keep the bone volume stable. Therefore, this expander can change the position of the upper dental arch to meet the purpose of medical and aesthetic needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a front view of the expander according to the first embodiment of the present application; Figure 2 is a top view of the expander according to the first embodiment of the present application; Figure 3 is a bottom view of the expander according to the first embodiment of the present application; Figure 4 is a schematic diagram of an angle expansion triangular bracket of the expander according to the first embodiment of the present application; Figure 5 is a front view of the expander according to the second embodiment of the present application; Figure 6 yes Figure 5 Enlarged view of point A in the middle; Figure 7 It is a front view of the expander embodying the third embodiment of the present application.

[0028] Description of reference numerals: 1. Hyperbolic lip bow clasp; 2. clasp; 3. First universal ball; 4. Second universal ball; 5. First rod body; 6. Second rod body; 7. Lower molar; 10. Upper palate base; 11. Anterior palate base; 12. Posterior palate base; 13. Edge; 131. Arc plate; 20. Screw pitch adjustment assembly; 21. Bidirectional lead screw; 22. Adjustment block; 23. Guide rod; 30. Angle expansion triangular bracket; 31. Threaded rod; 32. First support rod; 33. Second support rod; 40. Side expansion assembly; 41. First main expansion ear; 42. First auxiliary expansion ear; 43. First rotary vane; 44. First drive plate; 45. Second main expansion ear; 46. Second auxiliary expansion ear; 47. Elastic member; 48. Second rotary vane; 49. Second drive plate. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0030] The embodiment of the present application discloses an expander.

[0031] Embodiment 1 See also Figure 1 , Figure 2 and Figure 3 , an expander, including an upper palate base 10 for fixing to the upper palate. Two upper palate bases 10 are symmetrically arranged, each including a front palate base 11 and a rear palate base 12 arranged front and back, forming two symmetrically arranged front palate bases 11 and two symmetrically arranged rear palate bases 12. The material of the upper palate base 10 can be resin.

[0032] A spiral distance adjustment component 20 for adjusting the distance between the two front palatal bases 11 is connected between the two front palatal bases 11. Another spiral distance adjustment component 20 for adjusting the distance between the two rear palatal bases 12 is also connected between the two rear palatal bases 12.

[0033] A hyperbolic lip bow clasp 1 for blocking the force exerted by the lips on the upper dental arch is connected between the two front palatal bases 11, and the two ends of the hyperbolic lip bow clasp 1 are respectively connected to the two sides of the two front palatal bases 11. The two sides of the hyperbolic lip bow clasp 1 are higher than the middle, forming high ears that block the lips. A clasp 2 for buckling with the molars is respectively arranged on the two sides of the two rear palatal bases 12 that are away from each other.

[0034] Please also read Figure 4An angle expansion triangular bracket 30 capable of adding force to the front palate base 11 is connected between the front palate base 11 and the back palate base 12 of each upper palate base 10. The angle expansion triangular bracket 30 is located on the side of the upper palate base 10 away from the upper palate.

[0035] Two angle expansion triangular brackets 30 are symmetrically arranged, which include a threaded rod 31, a first support rod 32 and a second support rod 33. One end of the two support rods is fixed together and fixedly connected to the first universal ball 3, and the other ends of the two support rods are arranged at an angle. The threaded rod 31 is threadedly connected in sequence and passes through the first support rod 32 and the second support rod 33, and the end of the threaded rod 31 is provided with a second universal ball 4.

[0036] When the expander is not matched with the patient, the first universal ball 3 is rotatably connected to the posterior palatal base 12, and the second universal ball 4 is rotatably connected to the anterior palatal base 11. The purpose of such arrangement is to adjust the position of the posterior palatal base 12 according to the upper jaw morphology of the patient, and the anterior palatal base 11 can also be adjusted in angle relative to the posterior palatal base 12, so that the entire upper palatal base 10 is suitable for the current patient's needs.

[0037] After adjusting the patient's upper jaw and determining the positions of the front palate base 11 and the back palate base 12, the first universal ball 3 and the back palate base 12 can be fixed. Then, the patient is tried on again and the second universal ball 4 and the front palate base 11 are fixed. The threaded rod 31 can rotate relative to the second universal ball 4, and the threaded rod 31 is rotated to push the front palate base 11 upward, thereby applying force to the position where the maxillary bone is underdeveloped.

[0038] There are two screw pitch adjustment assemblies 20, each of which includes a bidirectional lead screw 21, an adjustment block 22 fixed in the middle of the bidirectional lead screw 21, and guide rods 23 arranged on both sides of the bidirectional lead screw 21. The two front palatal bases 11 are respectively threadedly connected to the two ends of the bidirectional lead screw 21, and the two front palatal bases 11 are respectively slidably connected to the two ends of the guide rod 23. The two rear palatal bases 12 are respectively threadedly connected to the two ends of the bidirectional lead screw 21, and the two rear palatal bases 12 are respectively slidably connected to the two ends of the guide rod 23.

[0039] Each surface of the adjustment block 22 is provided with a socket. The dentist inserts the tool into the socket and rotates the adjustment block 22. The bidirectional screw 21 rotates with the adjustment block 22 to make the two front palatal bases 11 approach or move away from each other or the two rear palatal bases 12 approach or move away from each other. After wearing for a certain period of time, the upper dental arch will gradually expand. The adjustment block 22 can be used to adjust the distance between the two front palatal bases 11 and the distance between the two rear palatal bases 12. At the same time, according to the lifting degree of the upper jaw, the threaded rod 31 is rotated so that the front palatal base 11 can continuously apply force to the upper jaw upward.

[0040] The two upper palate bases 10 are separated from one side to form an edge 13, which has an upward curvature and forms a position match between the upper teeth, which is beneficial to the positioning of the upper palate base 10. The space distance between the upper and lower jaws is increased to reduce the foreign body sensation caused by wearing.

[0041] Embodiment 2 See also Figure 5 and Figure 6 The difference between the second embodiment and the first embodiment is that in the second embodiment, a side expansion component 40 is provided on the side of the posterior palatal base 12 facing the lower dental arch, and two side expansion components 40 are symmetrically arranged on the two posterior palatal bases 12 .

[0042] The side expansion assembly 40 includes a first main expansion ear 41 and a first auxiliary expansion ear 42 which are respectively arranged on the inner side and the outer side of the edge 13. The first main expansion ear 41 and the first auxiliary expansion ear 42 are elastic arc plates which are spliced ​​together, and the cross section after splicing is elliptical.

[0043] A first rotary piece 43 is arranged between the cantilever end of the first main expanded ear 41 and the cantilever end of the first auxiliary expanded ear 42, a first rod body 5 is arranged on the rear palate base 12, the first rotary piece 43 is rotatably connected to the first rod body 5, and a first driving plate 44 is arranged on the side of the first rotary piece 43 facing the lower teeth.

[0044] When the upper and lower molars are engaged, the lower molar 7 acts on the first drive plate 44 and causes it to rotate at a certain angle. The first drive plate 44 drives the first rotary plate 43 to rotate. One end of the first rotary plate 43 drives the first main expanded ear 41 to elastically deform toward the upper dental arch side, and the first main expanded ear 41 presses the posterior palate base 12 toward the outer side of the upper dental arch. The other end of the first rotary plate 43 drives the first auxiliary expanded ear 42 to elastically deform toward the upper dental arch side, and the first auxiliary expanded ear 42 presses the upper dental arch upward or outward, driving the maxillary bone to expand or lift. When the upper and lower molars are separated, the first main expanded ear 41 and the first auxiliary expanded ear 42 drive the first rotary plate 43 to reset under their own elastic action.

[0045] The first driving plate 44 is arranged in an arc shape on the side facing the lower molar 7, so that it can better match the tooth surface and reduce the discomfort of the wearer.

[0046] Embodiment 3 See also Figure 7 The difference between the third embodiment and the first embodiment is that in the third embodiment, a side expansion component 40 is provided on the side of the posterior palatal base 12 facing the lower dental arch, and there are two side expansion components 40 which are symmetrically arranged on the two posterior palatal bases 12 .

[0047] The side expansion assembly 40 includes a second main expansion ear 45 and a second auxiliary expansion ear 46 respectively arranged on the inner side and the outer side of the edge 13. The second main expansion ear 45 and the second auxiliary expansion ear 46 are elastic arc plates and are spliced ​​together. The cross section after splicing is elliptical. The second main expansion ear 45 and the second auxiliary expansion ear 46 are rotatably connected near the side of the edge 13. The edge 13 is provided with an arc plate 131 supporting the second auxiliary expansion ear 46. An elastic member 47 is connected between the second main expansion ear 45 and the second auxiliary expansion ear 46. The elastic member 47 is a spring, and two of them are provided.

[0048] A second rotating piece 48 is arranged between the cantilever end of the second main expanded ear 45 and the cantilever end of the second auxiliary expanded ear 46, a second rod body 6 is arranged on the rear palate base 12, the second rotating piece 48 is rotatably connected with the second rod body 6, and a second driving plate 49 is arranged on the side of the second rod body 6 facing the lower teeth. The second driving plate 49 is arranged in an arc shape on the side facing the lower molar 7, so that it can better match the tooth surface and reduce the discomfort of the wearer.

[0049] When the upper and lower molars are not occluded, the elastic member 47 presses against the second main ear 45, and the second main ear 45 presses against the posterior palate base 12 on the outer side of the upper dental arch. When the upper and lower molars are occluded, the lower molar 7 acts on the second drive plate 49 and causes it to rotate at a certain angle, and the second drive plate 49 drives the second rotary plate 48 to rotate, overcoming the elastic force of the elastic member 47. One end of the second rotary plate 48 drives the second main ear 45 to elastically deform toward the upper dental arch, and the second main ear 45 presses the posterior palate base 12 on the outer side of the upper dental arch. The other end of the second rotary plate 48 drives the second auxiliary ear 46 to elastically deform toward the upper dental arch, and the second auxiliary ear presses the upper dental arch upward or outward, driving the maxillary bone to expand or lift. When the upper and lower molars are separated, the second main ear 45 and the second auxiliary ear 46 drive the second rotary plate 48 to reset under the action of the elastic member.

[0050] The embodiment of the present application also discloses a processing method for the above-mentioned expander.

[0051] See also Figure 1 , Figure 2 and Figure 3 , a method for using an expander, comprising the following steps: Step S1: Place the upper palate base 10 in the upper jaw of the patient, place the hyperbolic lip bow clasp 1 between the upper lip and the front incisors, and place the clasp 2 on the outside of the two molars on both sides.

[0052] Step S2: using the spiral distance adjustment component 20 to adjust the distance between the two front palatal bases 11 and the distance between the two rear palatal bases 12 respectively.

[0053] Specifically, the rotating adjustment block 22 drives the bidirectional lead screw 21 to rotate, and the rotation of the bidirectional lead screw 21 causes the two upper palate bases 10 to move closer or farther away, so that the clasp 2 can buckle the two molars.

[0054] Step S3: Rotate the rear palate base 12 with the first universal ball 3 as the center, and rotate the front palate base 11 with the second universal ball 4 as the center. After adjusting to the right position, fix the first universal ball 3 and the rear palate base 12, and fix the second universal ball 4 and the front palate base 11.

[0055] Specifically, place the expander into the upper jaw of the patient, rotate the posterior palate base 12 with the first universal ball 3 as the center, and rotate the anterior palate base 11 with the second universal ball 4 as the center. After adjusting the angles of the front and rear palate bases 12 to the right position, take out the expander first, fix the first universal ball 3 and the posterior palate base 12. For the convenience of operation, the second universal ball 4 and the anterior palate base 11 can be left unfixed first.

[0056] Put the expander into the patient's mouth again and adjust the position of the front palate base 11. Since the front palate base 11 is limited by the curvature of the upper jaw and the lips act on the hyperbolic lip bow clamp 1, the second universal ball 4 and the front palate base 11 can be left unfixed, or the expander can be taken out and the second universal ball 4 and the front palate base 11 can be fixed.

[0057] Step S4: Rotate the threaded rod 31 to push the front palate base 11 upward, thereby applying force to the position where the maxillary bone is underdeveloped.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bow expander, characterized in that: It comprises two symmetrically arranged upper palate bases (10), each of the upper palate bases (10) comprising a front palate base (11) and a rear palate base (12) arranged front and back; A spiral pitch adjustment component (20) is connected between the front palate bases (11) of the two upper palate bases (10) and between the rear palate bases (12) of the two upper palate bases (10); The front palate bases (11) of the two upper palate bases (10) are connected to a hyperbolic lip bow clasp (1), and the rear palate bases (12) of the two upper palate bases (10) are respectively provided with clasps (2); Each of the upper palate bases (10) is provided with an angle expansion triangular bracket (30) capable of applying force to the front palate base (11) on a side away from the upper palate.

2. The expander according to claim 1, characterized in that: Each of the angle expansion triangular brackets (30) comprises a threaded rod (31), a first support rod (32) and a second support rod (33); One end of the two support rods is fixed together and fixedly connected to the first universal ball (3), and the other ends of the two support rods are arranged at an angle, the threaded rod (31) is threadedly connected in sequence and passes through the first support rod (32) and the second support rod (33), and the end of the threaded rod (31) is provided with a second universal ball (4); The first universal ball (3) is connected to the rear palate base (12), and the second universal ball (4) is connected to the front palate base (11).

3. The expander according to claim 1, characterized in that: The screw pitch adjustment assembly (20) comprises a bidirectional lead screw (21), an adjustment block (22) fixed to the middle of the bidirectional lead screw (21), and a guide rod (23) arranged on one side of the bidirectional lead screw (21); The front palate bases (11) of the two upper palate bases (10) are respectively threadedly connected to the two ends of the bidirectional lead screw (21), and the front palate bases (11) of the two upper palate bases (10) are respectively slidably connected to the two ends of the guide rod (23); The rear palate bases (12) of the two upper palate bases (10) are respectively threadedly connected to the two ends of the bidirectional lead screw (21), and the rear palate bases (12) of the two upper palate bases (10) are respectively slidably connected to the two ends of the guide rod (23).

4. The expander according to claim 1, characterized in that: The two edges (13) of the upper palate base (10) that diverge from each other form a curved arc that matches the upper teeth on both sides.

5. The expander according to claim 4, characterized in that: A side expansion component (40) is symmetrically arranged on one side of the posterior palatal base (12) facing the lower dental arch, and the side expansion component (40) is located on the inner side of the edge (13). The lower teeth can drive the side expansion component (40) to squeeze the posterior palatal base (12) outward.

6. The expander according to claim 5, characterized in that: The side expansion assembly (40) comprises a first main expansion ear (41) and a first auxiliary expansion ear (42) respectively arranged on the inner side and the outer side of the edge (13); a first rotary blade (43) is arranged between the first main expansion ear (41) and the first auxiliary expansion ear (42) and on a side away from the edge (13); one side of the first rotary blade (43) is rotatably connected to the rear palate base (12); and a first driving plate (44) is arranged on a side of the first rotary blade (43) facing the lower teeth.

7. The expander according to claim 6, characterized in that: The first driving plate (44) is arranged in an arc shape on a side facing the lower teeth.

8. The expander according to claim 5, characterized in that: The side expansion assembly (40) comprises a second main expansion ear (45) and a second auxiliary expansion ear (46) respectively arranged on the inner side and the outer side of the edge (13); the second main expansion ear (45) and the second auxiliary expansion ear (46) are rotatably connected on a side close to the edge (13); an arc plate (131) supporting the second auxiliary expansion ear (46) is arranged on the edge (13); and an elastic member (47) is connected between the second main expansion ear (45) and the second auxiliary expansion ear (46); A second rotary blade (48) is provided between the second main expanded ear (45) and the second auxiliary expanded ear (46) and on a side away from the edge (13); one side of the second rotary blade (48) is rotatably connected to the rear palate base (12); and a second driving plate (49) is provided on a side of the second rotary blade (48) facing the lower teeth.

9. The expander according to claim 8, characterized in that: The second driving plate (49) is arranged in an arc shape on a side facing the lower teeth.

10. A method for using an expander, used for the expander according to any one of claims 2 to 9, characterized in that: Includes steps: The palate base (10) is placed in the upper jaw of the patient, the hyperbolic lip bow clasp (1) is placed between the upper lip and the front incisor, and the clasp (2) is respectively arranged on the outer sides of the two molars on both sides; Using a spiral distance adjustment component (20) to adjust the distance between the two front palatal bases (11) and the distance between the two rear palatal bases (12); The rear palate base (12) is rotated with the first universal ball (3) as the center of the ball, and the front palate base (11) is rotated with the second universal ball (4) as the center of the ball. After the adjustment is in place, the first universal ball (3) and the rear palate base (11) are fixed, and the second universal ball (4) and the front palate base (12) are fixed; The threaded rod (31) is rotated to push the front palate base (11) upward.

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