Dental correction system

Abstract

The utility model discloses a dental orthodontic system which comprises an upper jaw shell-shaped tooth appliance worn on the upper jaw and an extraoral arch, the extraoral arch comprises an inner arch and an outer arch, the inner arch comprises an inner arch body, the two ends of the inner arch body are respectively provided with a mounting part, each mounting part comprises two parallel connecting rods which are arranged at a first preset distance in the gingival jaw direction, the first preset distance ranges from 0.6 mm to 2 mm; a mounting boss with an opening structure on the near middle side is arranged on the buccal side surface of a cavity, corresponding to a single tooth in a back tooth area, of the upper jaw shell-shaped tooth appliance, the two connecting rods enter and are accommodated in the mounting boss through the opening structure, and the extra-oral arch is mounted in a manner that the mounting part is matched with the mounting boss in an inserting manner; a second preset distance is formed between the mounting boss and the edge, close to the gum, of the cheek side surface of the cavity of the tooth where the mounting boss is located, and the second preset distance is 1-3 mm; a third preset distance is formed between the mounting boss and the edge of the side, close to the occlusal surface, of the buccal side surface of the cavity of the tooth where the mounting boss is located, and the third preset distance ranges from 1 mm to 3 mm.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, more specifically to the field of oral orthodontic appliances, and in particular to a dental correction system. Background Art

[0002] Extraoral orthopedic appliances use the extraoral structures of the head, neck, occipital bone, neck, forehead, chin, etc. as the anti-base, and use orthopedic force to act on the teeth and jaws to regulate the growth and development of the jaws and change the growth direction of the bones to achieve the purpose of correcting maxillofacial deformities. Extraoral arches have the functions of strengthening support (preventing molars from moving mesial), pushing molars distally, depressing molars, and expanding or narrowing the dental arch. Its biggest advantage is that it uses the support of the extraoral skull to exert force on the teeth in the mouth, and will not exert force on non-acting teeth.

[0003] In recent years, more and more orthodontic manufacturers have begun to study the use of an extraoral bow in combination with the increasingly popular shell-shaped dental appliance, which is installed on the buccal side of the posterior teeth area of the shell-shaped dental appliance, so that the combined shell-shaped dental appliance can align the teeth and improve the growth of the jaw. In the current prior art, when wearing and installing the extraoral bow device, the oral part needs to install the two free ends of the inner bow in the extraoral bow on the buccal side of the posterior teeth area. At present, a retaining part is set on each buccal side of the posterior teeth area, and then the two free ends of the inner bow are respectively inserted into the retaining parts on the left and right sides for installation. However, the current extraoral bow is only fixed with a retaining part set on the buccal side of the posterior teeth area on the left and right sides of the patient, which is easy to rotate up and down, affecting the traction direction and thus affecting the traction effect. Although there is currently a method of setting two retaining parts in the front and back of the buccal area of the posterior teeth area on the left and right sides of the patient to solve the problem of the extraoral bow rotating up and down due to the small number of retaining points, this installation structure of the two front and back retaining parts significantly increases the foreign body sensation in the patient's mouth, which brings a very bad feeling to the patient. Utility Model Content

[0004] The technical problem solved by the utility model is to overcome the defects of the prior art and provide a dental correction system which can not only prevent the extraoral arch from rotating, but also reduce the volume of the boss installed inside the mouth of the extraoral arch, reduce the foreign body sensation, and improve the patient's acceptance.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A dental orthodontic system includes a maxillary shell-shaped tooth appliance worn on the maxilla and an extraoral arch. The extraoral arch includes an inner arch and an outer arch. The inner arch includes an inner arch body. Installation parts are respectively arranged at two ends of the inner arch body. The installation part includes two connecting rods that are parallel and are arranged at a first preset distance in the gingivomandibular direction. The first preset distance is 0.6 mm - 2 mm. The maxillary shell-shaped tooth appliance is an integral shell, and the shell includes a plurality of cavities for accommodating the patient's maxillary teeth. An installation boss with an opening structure on the mesial side is arranged on the buccal surface of the cavity corresponding to a single tooth in the posterior tooth area of the maxillary shell-shaped tooth appliance. The two connecting rods enter and are accommodated in the installation boss through the opening structure. The extraoral arch is installed on the maxillary shell-shaped tooth appliance through the plug-in fit between the installation part and the installation boss. Wherein, the installation boss includes an installation channel, and the inner contour shape and size of the installation channel satisfy: two of the connecting rods can be accommodated simultaneously; or, the installation boss includes two installation channels that are parallel to each other, and the inner contour shapes and sizes of the two installation channels respectively match the outer contour shapes and sizes of the two connecting rods, and the two connecting rods are respectively accommodated in the two installation channels. The installation boss is arranged at a second preset distance from the edge of the buccal surface of the cavity where the installation boss is located near the gingiva side. The second preset distance is 1 mm - 3 mm. The installation boss is arranged at a third preset distance from the edge of the buccal surface of the cavity where the installation boss is located near the occlusal surface side. The third preset distance is 1 mm - 3 mm.

[0007] Preferably, the length dimension of the installation boss in the gingivomandibular direction is greater than or equal to its width dimension in the mesiodistal direction.

[0008] Preferably, the inner arch body includes a first connecting piece connected to the outer arch, a second connecting piece horizontally connected to the installation part, and a transition piece arranged between the first connecting piece and the second connecting piece and extending towards the occlusal surface direction in the anterior tooth area. The distal end of the first connecting piece and the proximal end of the second connecting piece are respectively connected to two ends of the transition piece, and the whole is in a "Z" shape.

[0009] Preferably, the single tooth in the posterior tooth area is any one of tooth No. 4 to tooth No. 7.

[0010] Preferably, a limiting part is arranged at one end of the installation channel far from the opening structure. The two connecting rods enter the installation channel through the opening structure and abut against the limiting part, so as to limit the insertion position of the connecting rods in the installation channel along the entering direction.

[0011] Preferably, magnets with opposite magnetic poles are respectively provided at the distal middle ends of the two connecting rods and the proximal middle end of the limiting part, so that the two connecting rods are mutually attracted to the limiting part when inserted into the installation channel.

[0012] Preferably, two elastic sheets are provided on the distal tooth side of the installation boss, symmetrically arranged along the central axis in the mesiodistal direction of the installation boss. The two connecting rods slide into the installation boss from the side where the two elastic sheets are located to the proximal tooth side and are accommodated in the installation channel, and the two elastic sheets clamp and limit the two connecting rods to prevent the connecting rods from detaching from the installation boss in the distal tooth direction.

[0013] Preferably, the elastic sheet has an arc-shaped structure, and the concave surface of the elastic sheet faces the buccal surface on the distal tooth side of the installation boss.

[0014] Preferably, the installation channel includes a guiding part and a accommodating part arranged in sequence in the mesiodistal direction. The guiding part is arranged at one end of the opening structure. The size of the end of the guiding part away from the accommodating part is larger than the size of the end of the guiding part connected to the accommodating part. The inner contour shape and size of the accommodating part are the same as the outer contour shape and size of the connecting rod accommodated therein, and the connecting rod enters and is accommodated in the accommodating part through the guiding part.

[0015] Preferably, the installation boss is integrally formed on the buccal surface of the posterior tooth area of the upper shell-shaped tooth orthodontic appliance.

[0016] Preferably, the installation boss and the upper shell-shaped tooth orthodontic appliance are of a split design and are installed on the buccal surface of the posterior tooth area of the upper shell-shaped tooth orthodontic appliance by means of bonding, welding, etc.

[0017] Compared with the prior art, the present utility model adopts the above technical solutions and has at least one of the following beneficial effects:

[0018] (1) The dental orthodontic system provided by the present utility model installs the connecting rod by arranging an installation boss on the buccal side of the cavity corresponding to a single tooth in the posterior tooth area of the maxillary shell-shaped tooth orthodontic appliance. On the one hand, the installation boss has a small volume, resulting in a weak foreign body sensation in the patient's mouth and being more conducive to improving the patient's acceptance. On the other hand, by accommodating the two connecting rods in the installation boss, with the two connecting rods arranged vertically in the gingival-jaw direction at both ends of the inner arch body, two fixed points are formed in the installation boss after installation, which can prevent the inner arch from rotating up and down after installation and be relatively stable, ensuring that the overall traction direction of the extraoral arch will not change, thus facilitating the achievement of the expected traction effect. At the same time, by installing the two connecting rods of the extraoral arch body on the maxillary shell-shaped tooth orthodontic appliance, when the extraoral arch is pulled backward in the sagittal direction after installation, the inner arch applies a sagittal backward traction force to the maxillary shell-shaped tooth orthodontic appliance, causing the teeth accommodated in the maxillary shell-shaped tooth orthodontic appliance to move distally as a whole, so that while aligning the teeth using the maxillary shell-shaped tooth orthodontic appliance, the growth improvement of the jaw bone can also be achieved.

[0019] (2) The dental orthodontic system provided by the present utility model can also set the installation boss near the edge and occlusal surface of the maxillary shell-shaped tooth orthodontic appliance at a certain distance from the edge and occlusal surface of the maxillary shell-shaped tooth orthodontic appliance, which can avoid the flanging or deformation of the maxillary shell-shaped tooth orthodontic appliance caused by excessive extraoral traction force, resulting in a change in the direction of the corresponding installation boss, thus affecting the traction direction of the extraoral arch and ultimately causing an undesired traction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same numerical labels represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation.

[0021] Figure 1 is a schematic structural diagram of the dental orthodontic system in an embodiment of the present utility model;

[0022] Figure 2 is Figure 1 a schematic structural diagram of the extraoral arch in the shown embodiment;

[0023] Figure 3 is a schematic structural diagram of the dental orthodontic system in another embodiment of the present utility model, showing a Figure 1 different installation boss structure from the shown embodiment;

[0024] Figure 4 is a schematic structural diagram of the dental orthodontic system in yet another embodiment of the present utility model, showing a Figure 1The different extraoral arch structures in the illustrated embodiments;

[0025] Figure 5 is Figure 1 The schematic structural diagram of the limiting part in the illustrated embodiments;

[0026] Figure 6 is Figure 3 The schematic structural diagram of the limiting part in the illustrated embodiments;

[0027] Figure 7 is Figure 3 The schematic structural diagram of the mounting boss in one perspective in the illustrated embodiments;

[0028] Figure 8 is Figure 7 The schematic cross-sectional view of the mounting boss along the A-A' section;

[0029] Figure 9 is Figure 3 The schematic structural diagram of the mounting channel in one perspective in the illustrated embodiments;

[0030] Figure 10 is Figure 9 The schematic cross-sectional view of the mounting channel along the B-B' section;

[0031] Figure 11 is Figure 1 The schematic structural diagram of the mounting channel in one perspective in the illustrated embodiments;

[0032] Figure 12 is Figure 11 The schematic cross-sectional view of the mounting channel along the C-C' section. Detailed implementation manners

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will elaborate on each implementation manner of the present utility model in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each implementation manner of the present utility model, many technical details are proposed for the readers to better understand the present utility model. However, even without these technical details and various changes and modifications based on the following implementation manners, the technical solutions required to be protected by the present utility model can still be achieved. The division of the following various embodiments is for convenience of description and should not constitute any limitation to the specific implementation manners of the present utility model.

[0034] The directional terms such as "upper", "lower", "left", and "right" used in the description in this article are the directions in the drawings and do not refer to special limitations. Unless otherwise clearly specified and limited, the terms "connected" or "joined" in this article should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. It can be directly connected or indirectly connected through an intermediate medium.

[0035] In each embodiment of the present utility model, the "posterior tooth area" mentioned is defined according to the classification of teeth on pages 36-38 of the second edition of "Introduction to Stomatology" published by Peking University Medical Press, including premolars and molars, teeth numbered 4-8 in the FDI notation, and teeth numbered 1-3 in the FDI notation in the anterior tooth area. The teeth in the anterior tooth area include central incisors, lateral incisors, and canines.

[0036] Please refer to Figure 1 and Figure 2 as shown. The present application provides a dental orthodontic system 100, which includes a maxillary shell-shaped tooth orthodontic appliance 1 worn on the maxilla and an extraoral arch 2. The extraoral arch 2 includes an inner arch 3 and an outer arch 4. The inner arch 3 includes an inner arch body 31. Mounting portions 32 are respectively provided at both ends of the inner arch body 31. The mounting portion 32 includes two connecting rods 33 that are parallel and arranged at a first preset distance L1 in the gingivomarginal direction. The first preset distance L1 is 0.6 mm - 2 mm. Further explanation, during production, due to manufacturing errors, the two connecting rods 33 may not be strictly parallel, and there may be an error of approximately 0 - 5°, which is also within the protection scope of the present application. The parallel arrangement described here means that the central axes of the two connecting rods 33 are parallel to each other; in the present application, the two connecting rods 33 are arranged at a first preset distance L1 in the gingivomarginal direction, and the first preset distance L1 also refers to the distance between the central axes of the two connecting rods 33 in the gingivomarginal direction. Among them, in the present application, the first preset distance L1 can be within the range of 0.6 mm - 2 mm.

[0037] The maxillary shell tooth appliance 1 is an integral shell, and the shell includes a plurality of cavities for accommodating the maxillary teeth 10 of the patient. An installation boss 5 with an opening structure on the mesial side is provided on the buccal surface of the cavity corresponding to a tooth 101 in the posterior tooth area of the maxillary shell tooth appliance 1. The two connecting rods 33 enter and are accommodated in the installation boss 5 through the opening structure, and the extraoral arch 2 is installed on the maxillary shell tooth appliance 1 through the plug-in fit of the installation part 32 and the installation boss 5. When worn, the installation part 32 is generally located corresponding to the position of the posterior teeth in the patient's oral cavity, usually one of the teeth No. 4-7 on the left and right sides of the patient. Among them, the installation boss 5 includes an installation channel 51, and the inner contour shape and size of the installation channel 51 satisfy: two connecting rods 33 can be accommodated simultaneously. For example, in the gingivomandibular direction, the length dimension of the installation channel 51 in the gingivomandibular direction is at least the sum of the length dimensions of the two connecting rods 33 in the gingivomandibular direction and the distance between the two connecting rods 33 in the gingivomandibular direction; in the distal tooth direction, the height dimension of the installation channel 51 in the distal tooth direction is at least the height dimension of the connecting rod 33 in the distal tooth direction; the installation channel 51 is at least a channel having the length dimension and the height dimension.

[0038] Among them, the installation boss 5 is arranged at a second preset distance L2 from the edge of the buccal surface of the cavity of the tooth 101 where the installation boss 5 is located near the gingiva, and the second preset distance L2 is 1 mm - 3 mm. In addition, the installation boss 5 is arranged at a third preset distance L3 from the edge of the buccal surface of the cavity of the tooth 101 where the installation boss 5 is located near the occlusal surface, and the third preset distance L3 is 1 mm - 3 mm. Since the traction force of the extraoral arch 2 during extraoral traction is relatively large, usually greater than the intraoral traction force. If the installation boss 5 is close to the edge of the buccal surface of the cavity of the tooth 101 where the installation boss 5 is located near the gingiva or close to the occlusal surface, during the traction process, the relatively large traction force is likely to cause the edge of the buccal surface of the cavity of the tooth 101 where the installation boss 5 is located near the gingiva to warp or the edge near the occlusal surface to deform, which will cause the direction of the installation boss 5 to change, thus affecting the traction direction of the extraoral arch 2 and ultimately resulting in an undesired change in the traction effect. Through the experimental verification of the inventors of the present application, when L2 or L3 is less than 1 mm, the edge near the gingiva or the edge near the occlusal surface is likely to warp or deform; when L2 is greater than 3 mm, it will affect the arrangement of the installation boss 5 in the gingivomandibular direction, that is, it will cause the installation boss 5 to be arranged near the occlusal surface; when L3 is greater than 3 mm, it will cause the installation boss 5 to be arranged near the gingiva side. Therefore, in the present application, the preferred range of the second preset distance and the third preset distance is 1 mm - 3 mm.

[0039] Such a structural design, by setting a mounting boss 5 on the buccal side of the cavity corresponding to a single tooth in the posterior tooth area of the maxillary shell-shaped dental appliance 1, for mounting the connecting rod 33, on the one hand, the mounting boss 5 is small in size, the patient's foreign body sensation in the mouth is weak, and it is more conducive to improving the patient's acceptance; on the other hand, by accommodating the two connecting rods 33 in the mounting boss 5, the two connecting rods 33 arranged in the gingival and jaw direction at both ends of the inner arch body 31 form two fixing points in the mounting boss 5, so that the inner arch 3 will not rotate up and down after installation, and is relatively stable, so as to ensure that the overall traction direction of the extraoral arch 2 will not change, thereby facilitating the realization of the expected traction effect.

[0040] It is further explained that the length dimension of the mounting boss 5 in the gingival-maxillary direction is greater than or equal to its width dimension in the mesiodistal direction. In the present application, the mounting boss 5 is arranged on the buccal side of the cavity corresponding to a single tooth 101. Usually, the diameter dimension of the connecting rod 33 can be 1mm, and the width dimension of the mounting boss 5 in the mesiodistal direction can be 3-4 times the diameter dimension of the connecting rod 33, which is about 3mm-4mm. After installation, the outer contour of the connecting rod 33 has sufficient contact area with the inner contour of the mounting channel after being installed on the mounting boss 5 to ensure the stability of the connecting rod 33 after insertion; the length dimension of the mounting boss 5 in the gingival-maxillary direction is at least greater than the width dimension of the two connecting rods 33 in the gingival The height dimension in the jaw direction, the spacing between the two connecting rods 33 in the jaw-gingival direction, and the sum of the thicknesses of the walls of the one or two mounting channels; when designing, it is more convenient to determine the width dimension of the mounting boss 5 in the mesiodistal direction according to the ratio. For the length dimension of the mounting boss 5 in the jaw-gingival direction, when the mounting boss 5 and the edge of the buccal surface of the cavity of the tooth 101 where the mounting boss 5 is located are set at a second preset distance L2 near the gum side, and the mounting boss 5 and the edge of the buccal surface of the cavity of the tooth 101 where the mounting boss 5 is located are set at a third preset distance L3 near the occlusal side, the length dimension can be designed to be greater than or equal to the width dimension, which is convenient for design.

[0041] In another embodiment, see Figure 3 The mounting boss 5 may include two mounting channels 52, the two mounting channels 52 are parallel to each other, and the inner contour shape and size of the two mounting channels 52 are respectively matched with the outer contour shape and size of the two connecting rods 33, and the two connecting rods 33 are respectively accommodated in the two mounting channels 52; further explanation: in the present application, the spacing between the two mounting channels 52 arranged parallel to each other in the gingival and jaw direction is the first preset distance L1, and during installation, the inner arch 11 is inserted in parallel in the distal direction, so that the two connecting rods 33 are inserted in parallel into the two mounting channels 52, and the installation is completed.

[0042] In another embodiment, please refer to Figure 4 as shown. After the two connecting rods 33 are installed in the posterior tooth area of the maxillary shell-shaped tooth aligner 1, generally, there is a certain distance between the inner arch body 31 after wearing and the occlusal surface in the gingivomandibular direction. And the anterior tooth area part of the inner arch body 31 needs to be connected to the outer arch outside the mouth. At this time, the part of the outer arch connected to the outside of the mouth will inevitably hang the patient's upper lip towards the gingiva, which will increase the discomfort of the patient. To relieve this discomfort, the inner arch body 31 of the present application includes a first connecting member 311 connected to the outer arch 4, a second connecting member 313 horizontally connected to the mounting portion 32, and a transition member 313 disposed towards the occlusal surface in the anterior tooth area and located between the first connecting member 311 and the second connecting member 312. The far middle end of the first connecting member 311 and the near middle end of the second connecting member 312 are respectively connected to both ends of the transition member 313, presenting an overall "Z" shape. Among them, the first connecting member 311 is disposed near the occlusal surface of the patient's maxilla. Regarding the setting relationship between the first connecting member 311 and the second connecting member 312, the core concept is that there is a certain height difference between the first connecting member 311 and the second connecting member 312 in the gingivomandibular direction, so that the inner arch body 31 can be in a position near the occlusal surface in the anterior tooth area. In this way, after the first connecting member 311 is connected to the outer arch, the position of the part of the outer arch connected to the outside of the mouth is more fitted to the position between the upper and lower lips when the patient is in the natural lip-closed state. The patient's upper lip will not be hung towards the gingiva, which is beneficial to relieve the discomfort of the patient. Therefore, the first connecting member 311 and the second connecting member 312 can be arranged in parallel in the mesiodistal direction or at a certain angle. The present application does not make any restrictions.

[0043] Further preferably, please refer to Figure 5As shown. In particular, when the mounting boss 5 has a mounting channel 51, a limiting portion 6 is provided at one end of the mounting channel 51 away from the opening structure. The limiting portion 6 can be provided at the far middle end of the mounting channel 51, or can also be a limiting partition provided in the mounting channel 51. After the two connecting rods 33 enter the mounting channel 51 through the opening structure, the insertion ends of the connecting rods 33 abut against the limiting portion to limit the insertion positions of the two connecting rods 33 in the mounting channel 51 along the entering direction. When the mounting boss 5 has a mounting channel 51, if the limiting portion 6 is not provided, the entire mounting portion 32 may pass through the mounting channel 51. When the inner bow is pulled backward in the sagittal direction by the outer bow, the position of the mounting portion 32 cannot be limited, thus affecting the traction effect of the extraoral bow. Moreover, the mounting portion 32 passing through the mounting channel 51 may even scratch the oral muscles of the patient. Further explanation, in this embodiment, there is one opening structure, and the opening structure is provided at the near middle end of the mounting channel 51. The size of the opening structure is the same as the overall cross-sectional size of the two connecting rods 33. After the connecting rods enter the mounting channel, the far middle ends of the two connecting rods 33 can be limited at the opening structure to prevent the connecting rods 33 from rotating and shaking up and down.

[0044] Optionally, please refer to Figure 6 As shown. When the inside of the mounting boss 5 has two mounting channels 52, two limiting portions 6 can also be respectively provided at the ends of the two mounting channels 52 away from the opening structure. The setting positions and functions of the two limiting portions 6 are the same as those in the case where the inside of the mounting boss 5 has two mounting channels 52 as described above, and will not be elaborated here. Further explanation, in this embodiment, there are two opening structures, and the sizes of the two opening structures are respectively the same as the cross-sectional sizes of the two connecting rods 33. After the connecting rods 33 enter the mounting channels, the far middle ends of the two connecting rods 33 are respectively stably limited at the opening structures to prevent the connecting rods 33 from rotating and shaking up and down.

[0045] Further preferably, for more convenient and rapid installation, the present application is respectively provided with magnets (not shown) with opposite magnetic poles at the far middle ends of the two connecting rods 33 and the near middle ends of the limiting portion 6, so that the two connecting rods 33 are mutually adsorbed with the limiting portion 6 when inserted into the mounting channel, to guide the rapid installation of the entire mounting portion 32.

[0046] Further preferably, please refer to Figure 7 and Figure 8As shown, two elastic sheets 53 are symmetrically arranged along the central axis of the proximal and distal directions of the mounting boss 5 on the distal side of the mounting boss 5, and the two connecting rods 33 slide into the mounting boss 5 from the distal side where the two elastic sheets 53 are located to the proximal side along the insertion direction X and are accommodated in the mounting channel, and the two elastic sheets 53 clamp and limit the two connecting rods 33 to limit the connecting rods 33 from being separated from the mounting boss 5 in the distal direction, that is, in the direction opposite to the insertion direction X. Further explanation, when such a structural design is used, the distal side of the mounting boss 5 is a discontinuous structure, that is, the two elastic sheets 53 are not connected, and have an opening, and the opening is connected to the mounting channel. When in use, the connecting rod 33 is first pressed against the distal side of the mounting boss 5, and then force is applied along the insertion direction X to slide the connecting rod 33 into the mounting channel in the mounting boss 5, thus providing a more convenient installation method.

[0047] Further preferably, the elastic sheet 53 is in an arc-shaped structure, and the inner concave surface of the elastic sheet 53 is arranged toward the buccal surface of the distal tooth side of the mounting boss 5. In this way, the connecting rod 33 can be guided when sliding in the insertion direction X, so that the connecting rod 33 can quickly slide into the mounting channel in the mounting boss 5, thereby once again facilitating people's installation of the inner arch 1 and the maxillary shell-shaped dental appliance 1.

[0048] Further preferably, see Figure 9 and Figure 10 As shown, when the mounting boss 5 includes two mounting channels, the mounting channel 52 includes a guide portion 54 and a receiving portion 55 arranged in sequence along the proximal and distal directions, the guide portion 54 is arranged at one end of the opening structure, the dimension D1 of the end of the guide portion 54 away from the receiving portion 55 is larger than the dimension D2 of the end of the guide portion 54 connected to the receiving portion 55, the inner contour shape and size of the receiving portion 55 are consistent with the outer contour shape and size of the connecting rod 33 received therein, and the connecting rod 33 enters and is received in the receiving portion 55 via the guide portion 54. In this embodiment, the number of the guide portions 54 and the receiving portions 55 is consistent with the number of the connecting rods 33, and the inner contour shape and size of each of the receiving portions 55 are consistent with the outer contour shape and size of the connecting rod 33 received therein. Such a structural design can further facilitate doctors or patients to install the extraoral bow in the patient's narrow oral space, that is, the larger guide portion 54 can guide the connecting rod 33 to pass smoothly, thereby facilitating entry and accommodation in the accommodating portion 55.

[0049] Optionally, see Figure 11 and Figure 12As shown, when the mounting boss 5 includes a mounting channel, the mounting channel 51 includes a guiding portion 54 arranged successively in the mesiodistal direction and a receiving portion 55 communicated with the guiding portion 54. The guiding portion 54 is arranged at one end of the opening structure. The size D4 of the end of the guiding portion 54 away from the receiving portion 55 is larger than the size D5 of the end of the guiding portion 54 connected to the receiving portion 55. Herein, in this embodiment, the inner contour shape and size of the receiving portion are consistent with the outer contour shape and size of the connecting rod 33 received therein. The connecting rod 33 enters and is received in the receiving portion 55 through the guiding portion 54. In this embodiment, the inner contour shape and size of the receiving portion 55 being consistent with the outer contour shape and size of the connecting rod 33 received therein means that the inner contour shape and size of the receiving portion 55 are consistent with the overall outer contour and shape of the two connecting rods 33.

[0050] In one embodiment, the mounting boss is integrally formed on the buccal surface of the posterior tooth area of the maxillary shell-shaped tooth orthodontic appliance. Such a structure is beneficial to the processing of the maxillary shell-shaped tooth orthodontic appliance. For example, when processed by the thermoforming process, mounting bumps with the same shape and size as the mounting boss can be designed at the corresponding positions of the dental cast, and then after being integrally processed by thermoforming, the mounting channel can be formed by machining at the proximal end of the cavity of the mounting boss.

[0051] In another embodiment, the mounting boss and the maxillary shell-shaped tooth orthodontic appliance can also be designed as a split structure. The maxillary shell-shaped tooth orthodontic appliance and the mounting boss are processed and manufactured separately, and then installed on the buccal surface of the posterior tooth area of the maxillary shell-shaped tooth orthodontic appliance by means of bonding, welding, etc. Such a split structure design will not damage the structure of the maxillary shell-shaped tooth orthodontic appliance, will not affect its wrapping force on the teeth, and thus will not affect the orthodontic force of the maxillary shell-shaped tooth orthodontic appliance itself, while ensuring the orthodontic force of the maxillary shell-shaped tooth orthodontic appliance and the traction force of the extraoral arch.

[0052] It should be noted that, without contradiction, the above embodiments can be freely combined as needed to form different new implementation schemes. The implementation schemes formed by such combination are all within the protection scope of this application. To save the space of the application text, they will not be elaborated herein.

[0053] The above is only the preferred implementation mode of this application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the creation of this utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as within the protection scope of this application.

[0054] Similarly, the above description is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A dental orthodontic system, comprising a maxillary shell-shaped tooth orthodontic appliance worn on the maxilla and an extraoral arch. The extraoral arch includes an inner arch and an outer arch. It is characterized in that, The inner arch includes an inner arch body. Installation parts are respectively arranged at both ends of the inner arch body. The installation part includes two connecting rods that are parallel and arranged at a first preset distance in the gingivomandibular direction. The first preset distance is 0.6 mm - 2 mm; The maxillary shell-shaped tooth orthodontic appliance is an integral shell. The shell includes a plurality of cavities for accommodating the maxillary teeth of the patient. An installation boss with an opening structure on the mesial side is arranged on the buccal surface of the cavity corresponding to a single tooth in the posterior tooth area of the maxillary shell-shaped tooth orthodontic appliance. The two connecting rods enter and are accommodated in the installation boss through the opening structure. The extraoral arch is installed on the maxillary shell-shaped tooth orthodontic appliance through the plug-in fit between the installation part and the installation boss; wherein, The installation boss includes an installation channel. The inner contour shape and size of the installation channel satisfy: it can accommodate the two connecting rods simultaneously; or, the installation boss includes two installation channels. The two installation channels are parallel to each other, and the inner contour shapes and sizes of the two installation channels respectively match the outer contour shapes and sizes of the two connecting rods. The two connecting rods are respectively accommodated in the two installation channels; The installation boss is arranged at a second preset distance from the edge of the buccal surface of the cavity where the installation boss is located near the gingiva side of the tooth. The second preset distance is 1 mm - 3 mm; The installation boss is arranged at a third preset distance from the edge of the buccal surface of the cavity where the installation boss is located near the occlusal surface side of the tooth. The third preset distance is 1 mm - 3 mm.

2. The dental orthodontic system according to claim 1, wherein The length dimension of the installation boss in the gingivomandibular direction is greater than or equal to its width dimension in the mesiodistal direction.

3. The dental orthodontic system according to claim 1, wherein, The inner arch body includes a first connecting piece connected to the outer arch, a second connecting piece horizontally connected to the installation part, and a transition piece arranged between the first connecting piece and the second connecting piece and extending towards the occlusal surface direction in the anterior tooth area. The distal end of the first connecting piece and the proximal end of the second connecting piece are respectively connected to both ends of the transition piece, presenting a "Z" shape as a whole.

4. The dental orthodontic system according to claim 1, wherein One tooth in the posterior tooth area is any one of tooth No. 4 to tooth No.

7.

5. The dental orthodontic system according to claim 1, characterized in that, A limiting part is arranged at one end of the installation channel away from the opening structure. The two connecting rods enter the installation channel through the opening structure and abut against the limiting part, so as to limit the insertion position of the connecting rods in the installation channel along the entering direction.

6. The dental orthodontic system according to claim 5, characterized in that, Magnets with opposite magnetic poles are respectively arranged at the distal ends of the two connecting rods and the proximal end of the limiting part, so that the two connecting rods are mutually adsorbed with the limiting part when inserted into the installation channel.

7. The dental orthodontic system according to claim 1, wherein, Two elastic sheets are symmetrically arranged along the central axis of the mounting boss in the mesiodistal direction on the distal side of the mounting boss, and the two connecting rods slide into the mounting boss from the side where the two elastic sheets are located to the proximal side and are accommodated in the mounting channel, and the two elastic sheets clamp and limit the two connecting rods to prevent the connecting rods from disengaging from the mounting boss in the distal direction.

8. The dental orthodontic system according to claim 7, wherein, The elastic sheet is in an arc-shaped structure, and the inner concave surface of the elastic sheet is arranged toward the buccal surface of the distal tooth side of the mounting boss.

9. The dental orthodontic system according to claim 1, wherein, The installation channel includes a guide portion arranged in sequence along the proximal-distal direction and a receiving portion connected to the guide portion, the guide portion is arranged at one end of the opening structure, the size of the end of the guide portion away from the receiving portion is larger than the size of the end of the guide portion connected to the receiving portion, the inner contour shape and size of the receiving portion are consistent with the outer contour shape and size of the connecting rod received therein, and the connecting rod enters and is received in the receiving portion through the guide portion.

10. The dental orthodontic system according to claim 1, wherein The mounting boss is integrally formed on the buccal surface of the posterior tooth area of the maxillary shell-shaped dental appliance.

11. The dental orthodontic system according to claim 1, wherein, The mounting boss is designed as a separate body from the maxillary shell-shaped dental appliance and is mounted on the buccal surface of the posterior teeth area of the maxillary shell-shaped dental appliance by bonding or welding.

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