Invisible braces, extraoral bows matched therewith and invisible correction extraoral bow system having the same

Abstract

The present invention provides an invisible correction extraoral bow system, comprising invisible braces and an extraoral bow, wherein a bag-shaped structure is provided on the buccal side of the posterior teeth of the invisible braces, wherein a receiving cavity is provided in the bag-shaped structure, wherein the receiving cavity passes through the bag-shaped structure to form a bag opening, and wherein the bag opening is arranged toward the maxillary incisors; wherein the extraoral bow comprises an arch body and a reinforcement block, wherein the reinforcement block is connected to the arch foot of the inner arch of the arch body, and the reinforcement block is detachably plugged into the receiving cavity through the bag opening. The invisible correction extraoral bow system can combine the extraoral bow with the invisible braces to realize traction. The present invention also provides an invisible braces used in the invisible correction extraoral bow system and an extraoral bow matched with the invisible braces.

Description

Technical Field

[0001] The invention relates to a tooth correction device, in particular to an invisible brace, an extraoral bow matched therewith and an invisible correction extraoral bow system having the same. Background Art

[0002] Bracketless invisible orthodontic technology is relative to traditional fixed orthodontic technology. Its braces are made of medical resin diaphragm. There are no correction devices such as bands, brackets, archwires, etc. of fixed orthodontic appliances, so it is called "bracketless". The braces made of transparent resin diaphragm are not easily detected when worn in the mouth, so they are called "invisible". Bracketless invisible orthodontic appliances achieve the purpose of tooth correction through continuous small-range tooth movement. Compared with traditional orthodontic appliances, bracketless invisible orthodontic appliances have many advantages such as beautiful appearance, comfort, and good oral hygiene maintenance.

[0003] However, for the early correction of mild maxillary protrusion deformity without tooth extraction, traditional orthodontic appliances can use extraoral bows to assist in pushing the molars backwards, so as to achieve the overall retraction of the upper anterior teeth to achieve the correction purpose; relying solely on bracketless invisible braces for correction can easily lead to the lip tilting forward of the upper incisors when pushing the molars backwards, making it difficult to achieve the predetermined correction goal. Limited by the molding process of bracketless invisible braces, it is difficult to directly introduce extraoral forces into the bracketless invisible braces system, and it is difficult to organically combine the extraoral bow with the bracketless invisible braces. In recent years, there have been some studies on combining extraoral forces with bracketless invisible braces to achieve traction. Currently, traction on bracketless invisible braces is mainly achieved through the following methods:

[0004] (1) Make some incisions on the edge of the invisible braces to form a hookable shape, and hang the rubber band directly on the incision to achieve the traction effect. However, this method destroys the continuity of the edge of the invisible braces, reduces the area of ​​the invisible braces wrapped around the teeth, and indirectly affects the correction effect; at the same time, because the rubber band acts directly on the incision, it will cause the edge of the incision to curl up, which not only causes the invisible braces to deform and affect the correction effect, but also easily causes damage to the patient's oral mucosa.

[0005] (2) Cutting a notch on the edge of the invisible braces to accommodate the traction piece makes it easier for the traction piece to be attached to the teeth without contacting the invisible braces. However, this method will reduce the overall wrapping of the invisible braces on the teeth, indirectly affecting the correction effect. At the same time, because the traction piece is attached to the tooth surface and does not contact the invisible braces, when traction is performed, the point of action is the tooth on which it is located rather than the entire dentition, which may cause the tooth to move in an unexpected direction.

[0006] (3) Installing a traction hook on the invisible braces, for example, pasting the traction hook on the surface of the invisible braces. This method is to use chemical bonding or hot melting to paste the traction device on the invisible braces; some methods punch holes in the invisible braces, design the traction hook into two parts, and then pass the traction hook through the hole on the invisible braces and snap the two parts of the traction hook together. For example, Chinese invention patent application CN111297495A discloses a traction hook added to the side of a bracketless invisible braces chair, which includes a traction part and a connecting part. During assembly, a technician's pliers is used to punch holes in the bracketless braces. During assembly, the connecting column of the connecting part is passed through the hole punched on the bracketless braces, so that the connecting column and the connecting hole on the traction part are interference fit. However, this traction method still has the following problems in actual application:

[0007] a: Drilling holes at the traction site of the bracketless appliance will destroy the integrity of the bracketless invisible appliance, affect the covering effect of the bracketless invisible appliance on the teeth, and limit the movement of the teeth at the traction site;

[0008] b: The traction hook adopts a split structure, but because the traction hook is made of the same material as the bracketless invisible braces, when it is subjected to a large extraoral force, the traction part and the connecting part are easily deformed and separated, and the bracketless invisible braces cannot be pulled, resulting in an inability to apply a large external force to the bracketless invisible braces, and the correction effect is poor;

[0009] c: Although the inner connecting piece is a thin sheet that fits closely with the appliance, the traction part will deform after being subjected to force. Therefore, the inner connecting piece cannot effectively transmit the external force exerted on the force-bearing column to the entire bracketless appliance, and excessive force will weaken the effect. In addition, in order to protect the appliance as much as possible and reduce the impact of drilling on the bracketless appliance, the aperture of the hole should be minimized, resulting in a smaller contact area between the connecting column of the connecting part and the bracketless appliance, and the traction is carried out by a columnar traction hook, so the connecting column is easily tilted under force. After the connecting column is tilted, it will act on the bracketless appliance, which is easy to cause the bracketless appliance to deform and cause adverse effects on other teeth.

[0010] d: If the extraoral bow is connected by a traction hook, the arch foot of the extraoral bow is hooked on the force-bearing column. Since the force-bearing column is rod-shaped, it cannot position the force direction of the extraoral bow. The force direction of the extraoral bow acting on the bracketless orthodontic appliance can only be set by adjusting the inclination angle of the extraoral bow, and then the inclination angle of the extraoral bow is fixed by a high-position traction head cap; however, the high-position traction head cap may still become loose when worn on the patient's head, making it difficult to accurately control the force direction of the extraoral traction force.

[0011] Regarding the combination of an extraoral arch and an invisible orthodontic appliance, currently, the more commonly used method is to install a tubular structure on the invisible orthodontic appliance, and then insert the arch wire of the extraoral arch into the tubular structure. For example, Chinese Patent Application CN110063801A discloses an invisible orthodontic appliance. An outer tube is connected to the buccal side of the occlusal plate of the invisible orthodontic appliance. The extraoral traction arch is made of a wire, and its inner end in the mouth is inserted into the outer tube. However, when using the method of inserting the arch wire of the extraoral arch into the tubular structure, due to the limitations of their own structures, the contact surface between the extraoral arch and the tubular structure and between the tubular structure and the invisible orthodontic appliance is relatively small, mostly single-point or linear contact, which easily causes excessive local stress on the invisible orthodontic appliance, resulting in deformation, causing unnecessary movement of other teeth, and affecting the final orthodontic effect. In addition, in Chinese Patent Application CN110063801A, the extraoral arch is not a whole, and it is easy to have an imbalance in the three-dimensional direction of the forces on both sides, poor control of the (occlusal) plane, and poor control of the symmetry of the dental arch; moreover, the extraoral arch is connected to the occlusal plates of the upper and lower dental braces, and the acting force does not directly act on the molar area, so the effect of pushing the molars distally and inhibiting the forward movement of the maxilla is not good.

[0012] "Occlusion" in this article is a professional term in stomatology, and its English is occlusion. The characters "牙" and "合" are the left and right parts of a single character, which cannot be found in the common font library, so they are written separately as "牙合". Summary of the Invention

[0013] The present invention aims to solve at least one of the technical problems proposed in the above-mentioned background technology, and provides an invisible orthodontic extraoral arch system, which can combine the extraoral arch with the invisible dental brace to achieve traction.

[0014] To achieve the above object, the technical solution adopted by the present invention is:

[0015] An invisible orthodontic extraoral arch system, the invisible orthodontic extraoral arch system includes an invisible dental brace and an extraoral arch. A pocket structure is provided on the buccal side of the posterior teeth area of the upper jaw of the invisible dental brace. A receiving cavity is provided in the pocket structure. The receiving cavity penetrates through one side of the pocket structure to form a pocket opening, and the pocket opening is arranged towards the direction of the upper incisors; the extraoral arch includes an arch body and a reinforcing block. The reinforcing block is connected to the arch wire of the inner arch of the arch body, and the reinforcing block is detachably inserted into the receiving cavity through the pocket opening.

[0016] Further, the bag-shaped structure is a hollow quadrangular prism structure, including two parallel and oppositely arranged bottom plates, an end plate and two opposite inclined plates, the bottom plate is in the shape of an isosceles trapezoid, the end plate and the inclined plate are both rectangular, the end plate is connected to the upper bottom edge of the bottom plate, the two inclined plates are inclined and respectively connected to the two inclined edges of the bottom plate, the bottom plate, the end plate and the inclined plate together surround the receiving cavity, and one end of the bottom plate away from the end plate and the end of the inclined plate away from the end plate together surround the bag opening; one of the bottom plates is fixedly bonded to the buccal side of the invisible braces;

[0017] The reinforcing block is a quadrangular prism structure that is plugged into the bag-shaped structure, including two parallel and opposite bottom surfaces, two parallel and opposite end surfaces and two opposite inclined surfaces. The bottom surface is an isosceles trapezoidal shape, and the end surfaces and inclined surfaces are both rectangular. One of the end surfaces is connected to the lower bottom edge of the bottom surface, and the other end surface is connected to the upper bottom edge of the bottom surface. The two inclined surfaces are inclined and respectively connected to the two inclined edges of the bottom surface. The bow foot of the inner bow of the bow body is pre-buried in the end with the larger cross-section of the reinforcing block. When the reinforcing block is plugged into the accommodating cavity, the end surface of the reinforcing block with a smaller cross-section can be against the end plate, and the two inclined surfaces can respectively contact the inner walls of the two inclined plates in parallel.

[0018] Furthermore, the hole wall surrounding the receiving cavity has a first inclined portion so that the cross-sectional area of ​​the receiving cavity gradually decreases in the direction away from the bag opening; the reinforcing block has a second inclined portion, and the second inclined portion can be in parallel contact with the first inclined portion.

[0019] Furthermore, the bag-shaped structure and the reinforcement block are both made of resin, and the reinforcement block includes a main body and a buffer part that are connected to each other. The main body is made of hard resin, and the buffer part is made of soft lining resin. The buffer part is located at one end of the reinforcement block that is inserted into the accommodating cavity, and the buffer part can elastically offset the bag-shaped structure; the bow foot of the inner bow of the bow body is connected to the main body.

[0020] Furthermore, the pocket-shaped structure covers the distal part of the maxillary second premolar area and the distal part of the first molar area.

[0021] Furthermore, the invisible braces include an inner layer of invisible braces and an outer layer of invisible braces which are sleeved together, the buccal side of the posterior tooth area of ​​the outer layer of invisible braces protrudes toward the buccal direction to form an outer layer of cavitation, and the outer layer of cavitation and the inner layer of invisible braces together form a bag-shaped structure with a receiving cavity, and the receiving cavity penetrates the side of the outer layer of cavitation toward the maxillary incisor to form the bag opening.

[0022] Furthermore, the body of the extraoral bow is an integrated structure.

[0023] The present invention also provides an invisible brace, wherein a bag-shaped structure is provided on the buccal side of the posterior tooth area of ​​the invisible brace, wherein a receiving cavity is provided in the bag-shaped structure, wherein the receiving cavity passes through the bag-shaped structure to form a bag opening, and the bag opening is arranged toward the maxillary incisors.

[0024] Furthermore, the invisible braces include an inner layer of invisible braces and an outer layer of invisible braces which are sleeved together, the buccal side of the posterior tooth area of ​​the outer layer of invisible braces protrudes toward the buccal direction to form an outer layer of cavitation, and the outer layer of cavitation and the inner layer of invisible braces together form a bag-shaped structure with a receiving cavity, and the receiving cavity penetrates the side of the outer layer of cavitation toward the maxillary incisor to form the bag opening.

[0025] The present invention also provides an extraoral bow that cooperates with the invisible braces. The extraoral bow includes a bow body and a reinforcement block. The reinforcement block is connected to the bow foot of the inner bow of the bow body. The reinforcement block is detachably plugged into the accommodating cavity through the bag opening.

[0026] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0027] The invisible braces are connected to the body of the extraoral arch through the bag-shaped structure and the reinforcement block, and the extraoral arch and the invisible braces can be combined to achieve traction. During correction, the extraoral traction force is transmitted to the bag-shaped structure through the reinforcement block, and then transmitted to the invisible braces through the bag-shaped structure, and then to the periodontium and maxilla. Since the bag-shaped structure is located in the maxillary posterior teeth area of ​​the invisible braces, the extraoral traction force can be mainly on the periodontium and maxilla in the maxillary molar area, while achieving the purpose of inhibiting the forward development of the maxilla, it can more effectively achieve the purpose of non-invasively pushing the molars to the distal. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of the invisible braces and the bag-shaped structure in a preferred embodiment of the present invention.

[0029] Figure 2 It is a three-dimensional schematic diagram of the bag-shaped structure in a preferred embodiment of the present invention.

[0030] Figure 3 It is a perspective structural diagram of a preferred embodiment of the present invention when the bag-shaped structure and the reinforcement block are plugged together.

[0031] Figure 4 It is a schematic diagram of the three-dimensional structure in which the bag-shaped structure and the reinforcement block are in a separated state in a preferred embodiment of the present invention.

[0032] Figure 5 It is a schematic diagram of the structure of the invisible correction extraoral bow system in a preferred embodiment of the present invention when viewed from above.

[0033] Figure 6 This is a schematic top view of the invisible braces and the bag-shaped structure in another embodiment of the present invention.

[0034] Figure 7 for Figure 6 Enlarged view at A.

[0035] Main component symbols

[0036] 2. Invisible braces; 21. Inner invisible braces; 23. Outer invisible braces; 25. Outer cavitation; 3. Extraoral arch; 30. Arch body; 31. Reinforcement block; 32. Inner arch; 321. Bending part; 323. Bend; 33. Outer arch; 34. Bottom surface; 35. End surface; 36. Inclined surface; 37. Main body; 38. Buffering part; 4. Bag-shaped structure; 40. Accommodating cavity; 41. Bag mouth; 42. Bottom plate; 43. End plate; 44. Inclined plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] Please also see Figures 1 to 5 A preferred embodiment of the present invention provides an invisible correction extraoral bow system, including invisible braces 2 and an extraoral bow 3. The invisible braces 2 are maxillary braces used to be worn on the patient's maxillary dentition; the extraoral bow 3 is connected to the invisible braces 2 to apply extraoral force to the invisible braces 2, thereby assisting in correcting teeth.

[0041] The structure of the invisible braces 2 is substantially the same as that of the prior art, except that, in this embodiment, a bag-shaped structure 4 is provided on the buccal side of the posterior tooth region of the invisible braces 2. A receiving cavity 40 is provided in the bag-shaped structure 4, and the receiving cavity 40 passes through one side of the bag-shaped structure 4 to form a bag opening 41, which is arranged toward the maxillary incisor. In this embodiment, the bag-shaped structure 4 is a hollow quadrangular prism structure fixedly bonded to the buccal side of the posterior teeth area of ​​the invisible braces 2. Specifically, the bag-shaped structure 4 includes two parallel and oppositely arranged bottom plates 42, an end plate 43 and two opposite inclined plates 44. The bottom plate 42 is in the shape of an isosceles trapezoid, and the end plate 43 and the inclined plate 44 are both rectangular. The end plate 43 is connected to the upper bottom edge of the bottom plate 42, and the two inclined plates 44 are inclinedly arranged and respectively connected to the two inclined edges of the bottom plate 42; the bottom plate 42, the end plate 43 and the inclined plate 44 together enclose the receiving cavity 40, and the end of the bottom plate 42 away from the end plate 43 and the end of the inclined plate 44 away from the end plate 43 together enclose the bag opening 41. Due to the inclined arrangement of the two inclined plates 44, the cross section of the receiving cavity 40 gradually decreases in the direction away from the bag opening 211, and the bag-shaped structure 4 is a quadrangular prism structure with one end larger and the other end smaller.

[0042] One of the bottom plates 42 is fixedly bonded to the buccal side of the posterior tooth area of ​​the invisible braces 2. The "posterior tooth area" is defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38, including premolars and molars, which are shown as teeth 4-8 by the FDI marking method, and teeth 1-3 by the FDI marking method in the anterior tooth area. In this embodiment, the trapezoidal bottom plate 42 of the bag-shaped structure 4 covers the distal part of the maxillary second premolar area and the distal part of the first molar area. The receiving cavity 40 runs through the end of the bag-shaped structure 4 with a larger cross-section; and because the two inclined plates 44 are inclined, the cross-section of the receiving cavity 40 gradually decreases in the direction away from the bag opening 41. Preferably, the length of the bag-shaped structure 4 is 5-15 mm, the bag opening 41 of the receiving cavity 40 is roughly a rectangle of 10*8 mm-6*4 mm, the end of the receiving cavity 40 with a smaller cross section is roughly a rectangle of 8*6 mm-5*3 mm, and the thickness of the end plate 43, the inclined plate 44 and the bottom plate 42 are all about 1 mm, so that when the bag-shaped structure 4 is fixedly bonded to the invisible braces 2, it will not produce too much foreign body sensation. The bag-shaped structure 4 is made of resin material. Preferably, the bag-shaped structure 4 and the invisible braces 2 are made of the same material, and the bag-shaped structure 4 and the invisible braces 2 are chemically fixedly bonded with the same resin material as the invisible braces 2.

[0043] The extraoral bow 3 is most commonly used for patients with maxillary protrusion deformity, which is manifested as lip inclination of the upper front teeth and maxillary protrusion, which affects the appearance. When the maxillary protrusion deformity is treated with non-extraction invisible correction, it is difficult to achieve the predetermined correction goal by simply relying on the invisible brace without brackets. The interaction of forces can easily lead to the aggravation of the lip inclination of the upper incisors when the molars are pushed backwards, and it is difficult to achieve the predetermined correction goal. The use of the extraoral bow can assist in pushing the molars backwards, and use the extraoral force to achieve the overall inward retraction of the maxillary teeth, reduce the protrusion and achieve the correction purpose. The extraoral bow is a device that connects the inside and outside of the oral cavity and transmits the extraoral force to the inside of the mouth. It usually includes an inner bow and an outer bow. The main functions are to strengthen the support (prevent the molars from moving near), push the molars to the distal, and lower the molars. The extraoral bow 3 used in this embodiment includes a bow body 30 and a reinforcement block 31. The reinforcement block 31 is connected to the bow foot of the bow body 30, and the reinforcement block 31 is detachably plugged into the receiving cavity 40 through the bag opening 41. In this embodiment, the legs of the bow body 30 are embedded in the reinforcing block 31 .

[0044] The structure of the arch body 30 is roughly the same as the extraoral arch structure in the prior art, both of which include an inner arch 32 and an outer arch 33 connected to each other. The difference lies in the arrangement of the reinforcement block 31. The reinforcement block 31 is fixedly connected to the arch foot of the inner arch 32. The reinforcement block 31 is detachably plugged into the receiving cavity 40 through the bag opening 41, thereby realizing the combination of the extraoral arch 3 and the invisible braces 2. While the extraoral arch 3 is used to correct the maxillary protrusion by external force, the bracketless invisible correction is also used to align the teeth and coordinate the upper and lower dental arches.

[0045] In this embodiment, the reinforcing block 31 is a quadrangular prism structure plugged with the bag-shaped structure 4, which includes two parallel and opposite bottom surfaces 34, two parallel and opposite end surfaces 35, and two opposite inclined surfaces 36. The bottom surface 34 is in an isosceles trapezoidal shape, and the end surfaces 35 and the inclined surfaces 36 are both rectangular, and one end surface 35 is connected to the lower bottom edge of the bottom surface 34, and the other end surface 35 is connected to the upper bottom edge of the bottom surface 34. The two inclined surfaces 36 are inclined and respectively connected to the two inclined edges of the bottom surface 34. Since the two inclined surfaces 36 are inclined, the reinforcing block 31 forms a quadrangular prism structure with one end larger than the other end. In this embodiment, the foot of the inner arch 32 is embedded in the end of the reinforcing block 31 with a larger cross section, and the end of the reinforcing block 31 with a smaller cross section is inserted into the receiving cavity 40 through the bag opening 41. When the reinforcing block 31 is inserted into the receiving cavity 40, the two inclined surfaces 36 can be parallel to the inner walls of the two inclined plates 44 respectively, and the end surface 35 with a smaller cross section of the reinforcing block 31 can be against the inner wall of the end plate 43 of the bag-shaped structure 4. In this embodiment, the reinforcing block 31 includes a body 37 and a buffer part 38 connected to each other. The body 37 is made of hard resin, such as thermosetting resin (polymethyl methacrylate), which is located at the end of the reinforcing block 31 with a larger cross section, and the foot of the inner arch 32 is embedded in the body 37; the buffer part 38 is made of soft lining resin, such as methyl acrylate soft plastic, silicone rubber, etc., and its hardness is less than that of the body 37. The buffer part 38 is located at the end of the reinforcing block 31 with a smaller cross section, and the buffer part 38 can elastically offset the inner wall of the end plate 43 with a smaller cross section in the bag-shaped structure 4. Preferably, the buffer portion 38 and the body 37 are bonded by chemical bonding; the end face 35 with a larger cross section in the reinforcing block 31 is roughly a rectangle of 10*8mm-6*4mm, and the end face 35 with a smaller cross section in the reinforcing block 31 is roughly a rectangle of 8*6mm-5*3mm. Preferably, the buffer portion 38 and the body 37 are bonded by chemical bonding, the length of the buffer portion 38 is about 1 / 3 of the length of the reinforcing block 31, and the length of the body 37 is about 2 / 3 of the length of the reinforcing block 31; the length of the reinforcing block 31 is the vertical distance between the two end faces 35. The edges of the reinforcing block 31 are all rounded (blunted) to make a smooth transition at the junction.

[0046] In this embodiment, the body 30 of the extraoral bow 3 preferably adopts an integrated structure in which the outer bow 33 and the inner bow 32 are connected to each other in the prior art. It can adjust the angle between the plane of the inner bow 32 of the extraoral bow 3 and the plane of the outer bow 33 of the extraoral bow 3 to achieve the purpose of rotating the occlusal plane clockwise or counterclockwise, and can also play a control effect on cases with abnormal vertical development of the maxillary bone. The extraoral bow 3 of the integrated structure also includes two types: symmetrical and asymmetrical. When an asymmetrical extraoral bow structure is adopted, it can also coordinate the left and right force balance and adjust the maxillary midline deviation through the asymmetrical extraoral bow 3. The body 30 of the extraoral bow 3 can also have different models to be suitable for patients of different age groups. In this embodiment, the inner bow 32 is also bent with a curved portion 321 near the foot of the reinforcing block 31. The setting of the curved portion 321 allows medical personnel to adjust the length of the inner bow 32 to prevent the inner bow 32 from pressing against the invisible braces 2 and causing unexpected correction effects. One end of the inner bow 32 embedded in the reinforcing block 31 is also bent with a bent portion 323, which is embedded in the reinforcing block 31, making the connection between the inner bow 32 and the reinforcing block 31 more reliable and preventing the inner bow 32 from being twisted relative to the reinforcing block 31 by external force.

[0047] When manufacturing the above-mentioned invisible orthodontic extraoral arch system, the invisible braces 2, the bag-shaped structure 4 and the reinforcement block 31 are manufactured by computer digital simulation technology and hot pressing molding technology. During the manufacturing process, the arch foot of the inner arch 32 of the extraoral arch 3 is fixedly connected and embedded in the end with a larger cross-section of the reinforcement block 31. Its manufacturing belongs to the existing technology and will not be repeated here to omit space.

[0048] When installing the above-mentioned invisible correction extraoral bow system, the bag-shaped structure 4 is fixedly bonded to the maxillary posterior teeth area of ​​the invisible braces 2, and the bag opening 41 of the bag-shaped structure 4 is oriented toward the maxillary incisors; the invisible braces 2 containing the bag-shaped structure 4 is worn in the mouth, and then the reinforcing block 31 connected to the inner arch 32 of the extraoral bow 3 is loaded into the receiving cavity 40 of the bag-shaped structure 4, and the outer arch 33 of the extraoral bow 3 is connected to the head cap to generate correction force, so that the extraoral correction force acts on the periodontium and maxilla, thereby achieving tooth correction and functional correction of the early jaw of adolescents. The above-mentioned invisible correction extraoral bow system is mainly worn at night, and it is recommended to be worn for about 12 hours a day. It has a low impact on daily social and learning life, and effectively maintains the advantages of invisible correction in terms of beauty and comfort.

[0049] In the above-mentioned invisible correction extraoral arch system, the invisible braces 2 are connected to the inner arch 32 of the extraoral arch 3 through the bag-shaped structure 4 and the reinforcement block 31. During correction, the extraoral traction force is transmitted to the bag-shaped structure 4 through the reinforcement block 31, and then transmitted to the periodontium and maxilla through the bag-shaped structure 4 and the invisible braces 2. Since the bag-shaped structure 4 is arranged in the posterior tooth area of ​​the invisible braces 2, the extraoral traction force can mainly act on the periodontium and maxilla in the maxillary molar area, and while achieving the purpose of inhibiting the forward development of the maxilla, it can more effectively achieve the effect of non-invasively pushing the molars to the distal. In addition, in this embodiment, the bag-shaped structure 4 covers the distal of the maxillary second premolar area and the distal of the first molar area, which can greatly increase the force application area of ​​the extraoral traction force on the invisible braces 2, and improve the efficiency and effect of correction.

[0050] In the above-mentioned invisible correction extraoral arch system, the bag-shaped structure 4 is connected to the invisible braces 2 by means of fixed bonding, and there is no need to punch or cut the invisible braces 2, which will not destroy the integrity and covering effect of the invisible braces 2. The complete invisible braces 2 can apply force to the entire row of teeth as a whole to achieve the correction of the entire dentition, and avoid setting it on a single tooth, which causes unnecessary movement of the single tooth. When the extraoral traction force acts on the maxillary molar area through the combined structure of the reinforcement block 31 and the bag-shaped structure 4, the reaction force of the invisible braces 2 pushing the maxillary molars distally will be offset or reduced by the combined structure of the reinforcement block 31 and the bag-shaped structure 4, reducing the impact on other teeth, reducing the requirement for the maxillary anterior teeth to support the molars distally, and accelerating the invisible correction speed of the anterior teeth depression.

[0051] In the above-mentioned invisible correction extraoral bow system, the extraoral bow 3 is combined with the invisible braces 2 through the reinforcing block 31 and the bag-shaped structure 4. Compared with the columnar traction hook or tubular structure of the prior art, the reinforcing block 31 and the bag-shaped structure 4 are not easy to deform or tilt under the action of external force, and the force-bearing surface with the invisible braces 2 is larger, so that the extraoral traction force can be more evenly transmitted to the invisible braces 2. Therefore, the probability of deformation of the invisible braces 2 can also be reduced, and the adverse effects on other teeth during the correction process can be reduced. At the same time, the way of reinforcing block 31 and bag-shaped structure 4 plugging can make it easier to disassemble and assemble the extraoral bow 3.

[0052] In the above-mentioned invisible orthodontic extraoral bow system, the reinforcing block 31 is plugged into the bag-shaped structure 4 after passing through the bag opening 41. Due to the orientation design of the bag opening 41 and the limiting effect of the accommodating cavity 40, the reinforcing block 31 will not fall out of the bag-shaped structure 4 under the traction force of the extraoral bow 3. Under the premise of ensuring safety, the doctor can apply a larger external force to the bracketless orthodontic appliance through the extraoral bow 3 according to the patient's condition.

[0053] The above invisible correction extraoral bow system can also limit the angle position of the reinforcement block 31 connected to the extraoral bow 3 through the receiving cavity 40. Compared with the method of connecting the extraoral bow 3 through the traction hook in the prior art, it can more accurately control the direction of the extraoral traction force. When the bag-shaped structure 4 is fixed, the doctor can set the installation angle of the bag-shaped structure 4 according to the specific situation of each patient, which is more convenient to formulate a personalized correction plan for the patient.

[0054] The above-mentioned invisible correction extraoral arch system has a bag-shaped structure 4 that is a hollow quadrangular prism structure and has an inclined plate 44 that is arranged obliquely. The reinforcement block 31 has an inclined surface 36 that is in parallel contact with the inner wall of the inclined plate 44 of the bag-shaped structure 4. During correction, not only can the extraoral force be transmitted through the contact between the end face 35 of the reinforcement block 31 and the end plate 43 of the bag-shaped structure 4, but the contact area between the reinforcement block 31 and the bag-shaped structure 4 can also be further increased through the cooperation between the inclined surface 36 and the inclined plate 44, so that the extraoral traction force can be more evenly transmitted to the invisible braces 2.

[0055] The reinforcement block 31 of the above-mentioned invisible orthodontic extraoral bow system includes a main body 37 and a buffer part 38 which are connected to each other. The main body 37 is made of hard resin, which can better support the extraoral bow 3. The buffer part 38 is made of soft lining resin. The soft lining resin has a certain elasticity and a certain buffering effect. It can apply a more moderate and uniform external force to the bag-shaped structure 4 and the invisible braces 2 through the soft lining resin, thereby further reducing the deformation of the invisible braces 2.

[0056] The formation of the bag-shaped structure 4 is not limited to this embodiment. Figure 6 and Figure 7 In another embodiment, the invisible brace 2 includes an inner invisible brace 21 and an outer invisible brace 23 which are connected together by pressing, and the buccal side of the maxillary posterior teeth region of the outer invisible brace 23 bulges toward the buccal side to form an outer cavitation 25, and the outer cavitation 25 penetrates the side of the outer invisible brace 23 facing the inner invisible brace 21 and together with the inner invisible brace 21, forms the bag-shaped structure 4 with the receiving cavity 40, and the receiving cavity 40 penetrates the side of the outer cavitation 25 facing the maxillary incisor to form the bag opening 41. During manufacturing, a hole can be opened on the side of the outer cavitation 25 facing the maxillary incisor to obtain the bag opening 41. It can not only achieve the complete covering effect of the teeth through the inner invisible braces 21, but also form a bag-shaped structure 4 that can be connected to the extraoral arch 3 between the inner invisible braces 21 and the outer invisible braces 23. The bag-shaped structure 4 is formed by pressing the inner invisible braces 21 and the outer invisible braces 23 together. It is easier to manufacture and does not require chemical bonding or hot melting for connection. It has lower cost and no toxic substances that are unfriendly to the human body will be produced after the material is hot-melted.

[0057] The embodiment of the present invention further provides an invisible brace 2 used in the invisible brace. The buccal side of the maxillary posterior teeth area of ​​the invisible brace 2 is provided with a bag-shaped structure 4, and a receiving cavity 40 is provided in the bag-shaped structure 4. The receiving cavity 40 passes through one side of the bag-shaped structure 4 to form a bag opening 41, and the bag opening 41 is arranged toward the maxillary incisors. The embodiment of the present invention further provides an extraoral bow 3 used in conjunction with the invisible brace 2. The extraoral bow 3 includes a bow body 30 and a reinforcement block 31. The reinforcement block 31 is connected to the bow foot of the inner bow 32 of the bow body 30, and the reinforcement block 31 is detachably plugged into the receiving cavity 40 through the bag opening 41.

[0058] It can be understood that the shapes of the bag-shaped structure 4, the receiving cavity 40, and the reinforcement block 31 are not limited to the present embodiment. For example, in other embodiments, the bag-shaped structure 4 may also be in a cubic shape, and the receiving cavity 40 and the reinforcement block 31 may be a quadrangular prism-shaped cavity with a trapezoidal bottom surface in the present embodiment.

[0059] It can be understood that the receiving cavity 40 is not limited to the quadrangular prism-shaped cavity with a trapezoidal bottom surface in the present embodiment. For example, in other embodiments, the hole wall surrounding the receiving cavity 40 has one or more first inclined portions so that the cross-sectional area of ​​the receiving cavity 40 gradually decreases in the direction away from the bag opening 41; the reinforcing block 31 is correspondingly provided with one or more second inclined portions, and the second inclined portions can be in parallel contact with the first inclined portions.

[0060] It is understandable that the bottom plate 42 of the bag-shaped structure 4 may also cover only the maxillary second premolar area, or only the first molar area. The dimensions of the bag-shaped structure 4 and the reinforcement block 31 may be set to other values ​​as required.

[0061] It can be understood that the invisible braces 2 can also be provided with a retention cavity (not shown), and a bonding attachment (not shown) is provided on the corresponding tooth surface, the outer surface of the bonding attachment is consistent with the inner surface of the retention cavity, and the bonding attachment is mechanically engaged with the inner wall of the retention cavity, so that the invisible braces 2 is fixed on the teeth, which can play a retention role. It belongs to the prior art and will not be described here for the sake of space omission.

[0062] It can be understood that the connection method between the reinforcement block 31 and the arch foot of the inner arch 32 of the extraoral arch 3 is not limited to the present embodiment. For example, they can also be connected by a threaded connection.

[0063] Other unexplained parts of the present invention are the same as those of the prior art.

[0064] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. An invisible correction extraoral bow system, characterized in that: The invisible correction extraoral arch system comprises an invisible brace (2) and an extraoral arch (3); a bag-shaped structure (4) is provided on the buccal side of the maxillary posterior teeth of the invisible brace (2); a receiving cavity (40) is provided in the bag-shaped structure (4); the receiving cavity (40) passes through one side of the bag-shaped structure (4) to form a bag opening (41); the bag opening (41) is arranged toward the maxillary incisors; the extraoral arch (3) comprises an arch body (30) and a reinforcement block (31); the reinforcement block (31) is connected to the arch foot of the inner arch of the arch body (30); the reinforcement block (31) is detachably plugged into the receiving cavity (40) through the bag opening (41); The bag-shaped structure (4) is a hollow quadrangular prism structure, comprising two parallel and oppositely arranged bottom plates (42), an end plate (43) and two oppositely arranged inclined plates (44); the bottom plate (42) is in the shape of an isosceles trapezoid; the end plate (43) and the inclined plate (44) are both rectangular; the end plate (43) is connected to the upper bottom edge of the bottom plate (42); the two inclined plates (44) are inclinedly arranged and respectively connected to the two inclined edges of the bottom plate (42); the bottom plate (42), the end plate (43) and the inclined plate (44) together enclose the receiving cavity (40); one end of the bottom plate (42) away from the end plate (43) and one end of the inclined plate (44) away from the end plate (43) together enclose the bag opening (41); one of the bottom plates (42) is fixedly bonded to the buccal side of the invisible braces (2); The reinforcing block (31) is a quadrangular prism structure plugged into the bag-shaped structure (4), comprising two parallel and opposite bottom surfaces (34), two parallel and opposite end surfaces (35) and two opposite inclined surfaces (36); the bottom surface (34) is in the shape of an isosceles trapezoid; the end surfaces (35) and the inclined surfaces (36) are both rectangular; one end surface (35) is connected to the lower bottom edge of the bottom surface (34); the other end surface (35) is connected to the upper bottom edge of the bottom surface (34); the two inclined surfaces (36) are inclinedly arranged and respectively connected to the two inclined surfaces of the bottom surface (34); the foot of the inner bow of the bow body (30) is pre-buried in the end of the reinforcing block (31) with a larger cross section; when the reinforcing block (31) is plugged into the receiving cavity (40), the end surface (35) with a smaller cross section of the reinforcing block (31) can abut against the end plate (43); and the two inclined surfaces (36) can respectively contact the inner walls of the two inclined plates (44) in parallel; The hole wall surrounding the receiving cavity (40) has a first inclined portion, so that the cross-sectional area of ​​the receiving cavity (40) gradually decreases in a direction away from the bag opening (41); the reinforcing block (31) has a second inclined portion, and the second inclined portion can be in parallel contact with the first inclined portion.

2. The invisible correction extraoral bow system according to claim 1, characterized in that: The bag-shaped structure (4) and the reinforcing block (31) are both made of resin. The reinforcing block (31) comprises a main body (37) and a buffer portion (38) which are connected to each other. The main body (37) is made of hard resin, and the buffer portion (38) is made of soft lining resin. The buffer portion (38) is located at one end of the reinforcing block (31) which is inserted into the receiving cavity (40). The buffer portion (38) can elastically resist the bag-shaped structure (4). The bow foot of the inner bow of the bow body (30) is connected to the main body (37).

3. The invisible correction extraoral bow system according to claim 1, characterized in that: The pocket structure (4) covers the distal part of the maxillary second premolar area and the distal part of the first molar area.

4. The invisible correction extraoral bow system according to claim 1, characterized in that: The invisible braces (2) comprise an inner invisible brace (21) and an outer invisible brace (23) which are sleeved together, the buccal side of the posterior tooth area of ​​the outer invisible brace (23) protrudes in the buccal direction to form an outer cavitation bubble (25), the outer cavitation bubble (25) and the inner invisible brace (21) together form a bag-shaped structure (4) having a receiving cavity (40), and the receiving cavity (40) penetrates the side of the outer cavitation bubble (25) facing the maxillary incisor to form the bag opening (41).

5. The invisible correction extraoral bow system according to claim 1, characterized in that: The bow body (30) of the extraoral bow (3) is an integrated structure.

6. An invisible brace (2), characterized in that: The invisible braces (2) are provided with a bag-shaped structure (4) on the buccal side of the posterior teeth area, and a receiving cavity (40) is provided in the bag-shaped structure (4). The receiving cavity (40) passes through one side of the bag-shaped structure (4) to form a bag opening (41), and the bag opening (41) is arranged toward the maxillary incisors. The bag-shaped structure (4) is a hollow quadrangular prism structure, comprising two parallel and oppositely arranged bottom plates (42), an end plate (43) and two oppositely arranged inclined plates (44), the bottom plate (42) is in the shape of an isosceles trapezoid, and the end plate (43) is in the shape of a and the inclined plate (44) are both rectangular, the end plate (43) is connected to the upper bottom edge of the bottom plate (42), the two inclined plates (44) are inclinedly arranged and respectively connected to the two inclined edges of the bottom plate (42), the bottom plate (42), the end plate (43) and the inclined plate (44) together form the receiving cavity (40), and one end of the bottom plate (42) away from the end plate (43) and one end of the inclined plate (44) away from the end plate (43) together form the pocket (41); one of the bottom plates (42) is fixedly bonded to the buccal side of the invisible braces (2).

7. The invisible braces (2) according to claim 6, characterized in that: The invisible braces (2) comprise an inner invisible brace (21) and an outer invisible brace (23) which are sleeved together, the buccal side of the posterior tooth area of ​​the outer invisible brace (23) protrudes in the buccal direction to form an outer cavitation bubble (25), the outer cavitation bubble (25) and the inner invisible brace (21) together form a bag-shaped structure (4) having a receiving cavity (40), and the receiving cavity (40) penetrates the side of the outer cavitation bubble (25) facing the maxillary incisor to form the bag opening (41).

8. An extraoral bow (3) matched with the invisible braces (2) according to claim 6, characterized in that: The extraoral arch (3) comprises an arch body (30) and a reinforcing block (31), wherein the reinforcing block (31) is connected to the arch foot of the inner arch of the arch body (30), and the reinforcing block (31) is detachably plugged into the receiving cavity (40) through the bag opening (41); the reinforcing block (31) is a quadrangular prism structure plugged into the bag-shaped structure (4), comprising two parallel and opposite bottom surfaces (34), two parallel and opposite end surfaces (35) and two opposite inclined surfaces (36), wherein the bottom surface (34) is in the shape of an isosceles trapezoid, and the end surfaces (35) and the inclined surfaces (36) are both rectangular. One end face (35) is connected to the lower bottom edge of the bottom face (34), and the other end face (35) is connected to the upper bottom edge of the bottom face (34). The two inclined faces (36) are arranged obliquely and are respectively connected to the two inclined faces of the bottom face (34). The foot of the inner bow of the bow body (30) is pre-buried in the end of the reinforcing block (31) with a larger cross section. When the reinforcing block (31) is inserted into the receiving cavity (40), the end face (35) of the reinforcing block (31) with a smaller cross section can abut against the end plate (43), and the two inclined faces (36) can respectively contact the inner walls of the two inclined plates (44) in parallel.

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