Dental orthodontic device

Abstract

The utility model discloses dental treatment device includes first shell body and the first protruding part of protruding setting in the posterior dental area of first shell body, and second shell body and the second protruding part of protruding setting in the posterior dental area of second shell body, the side of first protruding part to the occlusal surface of counteracting is formed with the first guide surface of inclined setting, and the first guide surface is plane, and the mesial end and distal end of first guide surface have first preset height difference in gingival jaw upward, the side of second protruding part to the occlusal surface of counteracting is formed with the second guide surface of inclined setting, and the second guide surface is plane, and the mesial end and distal end of second guide surface have second preset height difference in gingival jaw upward, when wearing, the first guide surface and the second guide surface interact, and guide first shell body and second shell body relative movement in the sagittal direction, to adjust the relative position of upper jaw and lower jaw to target position, wherein, at target position, the profile of first guide surface and second guide surface is basically matched.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, more specifically to the field of dental appliances, and particularly to a dental orthodontic device that can adjust the relative positional relationship between the upper and lower jaws. Background Technology

[0002] Malocclusion refers to imbalances in the position and relationship of teeth, dental arches, jawbones, and craniofacial structures. Common symptoms include crowded teeth, interdental spaces, and reverse overbite. Most malocclusions occur during childhood growth and development due to congenital genetic factors or acquired environmental factors such as diseases, poor oral habits, and delayed tooth eruption. Malocclusions can also develop after growth and development due to trauma, periodontal disease, etc., resulting in conditions such as misaligned teeth, abnormal occlusal relationships between the upper and lower dental arches, abnormalities in the size, shape, and position of the jawbone, and facial deformities.

[0003] Shell-shaped orthodontic appliances are devices used to treat malocclusion. They are made of safe, elastic, and transparent polymer materials, allowing the treatment process to be completed almost imperceptibly to others. For malocclusion cases involving sagittal jaw position factors, jaw position reconstruction is required to correct the jaw position, achieving mandibular anterior or posterior guidance.

[0004] Existing clear aligners for jaw reconstruction include TB (short for Twin-block, also known as double-block appliance) and reverse TB. TB promotes mandibular bone growth while retracting the upper anterior teeth; while reverse TB mainly adjusts the occlusal slope to functionally inhibit mandibular advancement and promote maxillary bone development, thus treating underbite.

[0005] Existing design approaches are as follows: One approach involves designing the amount of mandibular and maxillary movement and the shape of the guide plate based on the maximum position where the mandible can protrude or retract. The interaction between the guide plates of the upper and lower jaws guides the mandible to protrude or retract to its maximum position during wear. Another approach, as provided in Chinese patent CN202321026171.2, involves designing an "overcorrection" movement based on the maximum position where the mandible can protrude or retract, ensuring that the actual movement of the mandibular teeth exceeds the predetermined movement.

[0006] However, in practical applications, when patients wear orthodontic appliances designed with the aforementioned existing technologies, they need to guide their mandible forward or backward to the designed position in a "one-step" manner. Clinically, this may cause discomfort to patients, thereby affecting the orthodontic effect and progress.

[0007] Therefore, it is of great significance to study a dental orthodontic device that is simple in structure, comfortable to wear, and capable of adjusting the relative position of the upper and lower jaws. Utility Model Content

[0008] The technical problem solved by this invention is to overcome the defects of the existing technology and provide a dental orthodontic device that is simple in structure, comfortable to wear, and capable of adjusting the relative position of the upper and lower jaws.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A dental orthodontic appliance includes: a first shell-shaped body for accommodating a patient's maxillary teeth and a first protrusion protruding from the posterior tooth region of the first shell-shaped body; and a second shell-shaped body for accommodating a patient's mandibular teeth and a second protrusion protruding from the posterior tooth region of the second shell-shaped body. The first protrusion has an inclined first guide surface on its side facing the opposing occlusal surface. The first guide surface is planar, and its mesial and distal ends have a first preset height difference in the gingival-occlusal direction. The second protrusion has an inclined second guide surface on its side facing the opposing occlusal surface. The second guide surface is planar, and its mesial and distal ends have a second preset height difference in the gingival-occlusal direction. The difference between the first preset height difference and the second preset height difference is within a threshold range. When worn, the first guide surface and the second guide surface interact to guide the first shell-shaped body and the second shell-shaped body to move relative to each other in the sagittal direction, thereby adjusting the relative position of the maxilla and mandible to a target position, wherein, at the target position, the contours of the first guide surface and the second guide surface are substantially matched.

[0011] With this design, during the wearing process, the first and second guide surfaces can be gradually and progressively fitted into place under the action of chewing force, giving the patient an adaptive process to slowly bite and guide the relative position of the upper and lower jaws to the target position. Compared with the "one-step" wearing and correction of appliances with TB or reverse TB structures, patients are more likely to adapt and cooperate, which helps to improve patient compliance and treatment efficiency.

[0012] Preferably, the gingival-maxillary height of the first guiding surface gradually decreases from the mesial end to the distal end, and the gingival-maxillary height of the second guiding surface gradually increases from the mesial end to the distal end; wherein, when the first guiding surface and the second guiding surface interact, the second shell-shaped body moves backward relative to the first shell-shaped body in the sagittal direction, guiding the patient's mandible to move backward in the sagittal direction.

[0013] Preferably, the gingival-maxillary height of the first guide surface gradually increases from the mesial end to the distal end, and the gingival-maxillary height of the second guide surface gradually decreases from the mesial end to the distal end; wherein, when the first guide surface and the second guide surface interact, the second shell-shaped body moves forward relative to the first shell-shaped body in the sagittal direction, guiding the patient's mandible to move forward in the sagittal direction.

[0014] Preferably, the first guide surface and the second guide surface are respectively set at a preset angle to the patient's occlusal plane, wherein the preset angle is 5°-60°. By setting the preset angle, the angle setting of the guide surface can be selected according to the specific situation of the patient, providing a variety of options and making it suitable for widespread application.

[0015] Preferably, the target position is: the incisal edges of the maxillary incisors and the incisal edges of the mandibular incisors are opposite each other in the sagittal direction.

[0016] Preferably, the total height of the first protrusion and the second protrusion in the gingival-maxillary direction satisfies the preset maxillary occlusal height when the patient's upper and lower jaws are adjusted to the target position.

[0017] Preferably, the total height of the first and second protrusions in the gingival direction is such that it opens the vertical occlusion of the patient's maxillary and mandibular incisors by 0-1.5 mm. This total height setting is used to eliminate occlusal interference between the patient's upper and lower jaws; that is, at this total height setting, there is no occlusal interference between the upper and lower jaws in the patient's mouth, providing the possibility for sagittal movement of the mandible and avoiding the inability to move due to occlusal interference.

[0018] Preferably, the first protrusion and the second protrusion cover at least two teeth in the posterior tooth region in the mesiodistal direction.

[0019] Preferably, the first protrusion and the second protrusion cover at least the second premolar and the first molar in the mesiodistal direction of the posterior tooth region.

[0020] Preferably, the first protrusion covers the mesial end of the maxillary first premolar to the distal end of the maxillary last molar in a mesiodistal direction, and the second protrusion covers the distal end of the mandibular last molar to the mesial end of the mandibular first premolar in a mesiodistal direction. This arrangement, on the one hand, expands the support area of ​​the first and second protrusions, dispersing the orthodontic force and reducing local stress concentration; on the other hand, it binds all the posterior teeth in the maxillary and mandibular posterior regions together as a whole to bear force, allowing the mandibular posterior teeth to complete sagittal movement together, which helps achieve the desired orthodontic effect.

[0021] Preferably, the mesial-to-distal length of the first protrusion and the mesial-to-distal length of the second protrusion are 15mm-35mm.

[0022] Preferably, the buccal-lingual width of the first protrusion is 0.8-1.2 times the buccal-lingual width of the tooth it covers, and the buccal-lingual width of the second protrusion is 0.8-1.2 times the buccal-lingual width of the posterior tooth it covers. This width setting satisfies occlusal stability while avoiding contact or abrasion with the patient's buccal mucosa, thus improving comfort.

[0023] Preferably, the buccal-lingual width of the first protrusion and the second protrusion is greater than or equal to the buccal-lingual width of the most anterior mesiodistal tooth they cover, and less than or equal to the buccal-lingual width of the most posterior mesiodistal tooth they cover.

[0024] Preferably, the cheek-tongue width of the first protrusion and the second protrusion is 6mm-12mm.

[0025] Preferably, the first protrusion and the first shell-shaped body are integrally formed, and the second protrusion and the second shell-shaped body are integrally formed. This configuration simplifies the manufacturing process, for example, by integrally forming the part through hot pressing or additive manufacturing; it also improves the strength of the structural component and eliminates the risk of parts falling off.

[0026] Preferably, both the first and second protrusions are hollow structures, and a reinforcing member is provided on the hollow structure to enhance its strength. The reinforcing member is a solid-phase filler, fixed to the hollow structure by bonding or welding; alternatively, the reinforcing member is a two-phase filler, injected into the hollow structure in liquid phase and then solidified; or, the reinforcing member is a concave or convex structure extending along the gingival-maxillary direction, formed by the concave or convex surfaces of the buccal and / or lingual sides of the hollow structure. The reinforcing member enhances the mechanical strength of the hollow structure, ensuring that it does not deform during occlusion and thus guaranteeing the orthodontic effect.

[0027] Preferably, when the reinforcing member is a concave or convex structure extending along the gingival direction, the concave or convex structure penetrates the buccal and / or lingual side of the hollow structure along the gingival direction. This configuration maximizes the hollow structure's resistance to deformation in the gingival direction, resulting in optimal reinforcement.

[0028] Preferably, the first protrusion and the first shell-shaped body are separate components. The posterior tooth region of the first shell-shaped body protrudes towards the opposing jaw to form a first mounting platform. The top surface of the first mounting platform protrudes towards the opposing jaw to form a first positioning structure. The bottom surface of the first protrusion is recessed towards the jaw to form a second positioning structure that matches the first positioning structure. The first protrusion is positioned and bonded to the first mounting platform by matching the first positioning structure and the second positioning structure. Alternatively, the second protrusion and the second shell-shaped body are separate components. The posterior tooth region of the second shell-shaped body protrudes towards the opposing jaw to form a second mounting platform. The top surface of the second mounting platform protrudes towards the opposing jaw to form a third positioning structure. The bottom surface of the second protrusion is recessed towards the jaw to form a fourth positioning structure that matches the third positioning structure. The second protrusion is positioned and bonded to the second mounting platform by matching the third positioning structure and the fourth positioning structure. The separate design provides a way to replace the first protrusion and the second protrusion. When the first protrusion or the second protrusion needs to be adjusted according to the actual situation, only the first protrusion or the second protrusion needs to be replaced separately, without having to replace the first shell-shaped body or the second shell-shaped body together, thus saving costs.

[0029] Preferably, the material stiffness of the first mounting platform is greater than that of the first protrusion, and the material stiffness of the second mounting platform is greater than that of the second protrusion. This stiffness setting increases the stability of the support provided by the first mounting platform and the second mounting platform to the first protrusion and the second protrusion, respectively.

[0030] Preferably, a dental arch portion is provided on the lingual side of the posterior tooth region of the first shell-shaped body. The two ends of the dental arch portion are respectively connected to the gingival margin or adjacent to the gingival margin on the left and right sides of the posterior tooth region of the first shell-shaped body. The dental arch portion applies force to the posterior tooth region of the first shell-shaped body through elastic deformation, thereby applying an expanding or contracting force to the multiple teeth contained within the first shell-shaped body. In this way, dental arch morphology adjustment and jawbone position correction can be achieved simultaneously, shortening the treatment cycle. Attached Figure Description

[0031] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same numerical reference numerals are denoted as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0032] Figure 1 This is a schematic diagram of the structure of a dental orthodontic device according to Embodiment 1 of this utility model;

[0033] Figure 2This is a schematic diagram of another dental orthodontic device in Embodiment 1 of this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of another dental orthodontic device in Embodiment 1 of this utility model;

[0035] Figure 4 This is a schematic diagram of the structure of a second shell-shaped body in Embodiment 1 of this utility model;

[0036] Figure 5 This is a schematic diagram of another second shell-shaped body in Embodiment 1 of this utility model;

[0037] Figure 6 This is a schematic diagram of the structure of another second shell-shaped body in Embodiment 1 of this utility model;

[0038] Figure 7 for Figure 6 A magnified view of part A in the diagram;

[0039] Figure 8 This is a schematic diagram of the dental orthodontic device with an installation platform in Embodiment 1 of this utility model;

[0040] Figure 9 This is a schematic diagram of the dental orthodontic device with an arch section in Embodiment 1 of this utility model;

[0041] Figure 10 This is a schematic diagram of the dental orthodontic device in Embodiment 2 of this utility model. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed by this utility model can be implemented even without these technical details and with various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of this utility model.

[0043] The directional terms "up," "down," "left," and "right" used in this document refer to the directions shown in the accompanying drawings and do not imply any specific limitation. Unless otherwise explicitly stated or limited, the term "connection" in this document should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part of a structure. It can refer to a direct connection or an indirect connection through an intermediate medium.

[0044] In the various embodiments of this invention, the term "posterior tooth region" is defined according to the classification of teeth in the 2nd edition of *Introduction to Stomatology*, published by Peking University Medical Press, pages 36-38. It includes premolars and molars, teeth marked as 4-8 using the FDI notation, and teeth marked as 1-3 using the FDI notation for the anterior tooth region. The teeth in the anterior tooth region include the central incisors, lateral incisors, and canines.

[0045] As described in the background section, TB or reverse TB structures are commonly used for adjusting the relative position of the upper and lower jaws. However, these structures are designed based on the maximum forward or backward position of the mandible, determining the amount of movement and guide plate shape for the upper and lower jaws. The interaction between the upper and lower jaw guide plates guides the mandible to its maximum forward or backward position during wear. Alternatively, based on the maximum forward or backward position of the mandible, an "overcorrection" movement is designed, making the actual movement of the mandibular teeth greater than the predetermined movement. However, in practical applications, with appliances designed using these existing technologies, patients need to have their mandible guided forward or backward to the designed position in a "one-step" process. Clinically, patients report significant discomfort and high resistance to wearing the appliances, severely impacting the treatment effect and progress.

[0046] Therefore, this application provides a dental orthodontic device, including a first shell-shaped body for accommodating the patient's maxillary teeth and a first protrusion protruding from the posterior tooth region of the first shell-shaped body, and a second shell-shaped body for accommodating the patient's mandibular teeth and a second protrusion protruding from the posterior tooth region of the second shell-shaped body; the first protrusion has an inclined first guide surface on the side facing the opposing occlusal surface, the first guide surface being planar, and the mesial and distal ends of the first guide surface having a first preset height difference in the gingival-occlusal direction; the second protrusion has an inclined second guide surface on the side facing the opposing occlusal surface, the second guide surface being planar, and the mesial and distal ends of the second guide surface having a second preset height difference in the gingival-occlusal direction; and the difference between the first preset height difference and the second preset height difference is within a threshold range; when worn, the first guide surface and the second guide surface interact to guide the first shell-shaped body and the second shell-shaped body to move relative to each other in the sagittal direction, so as to adjust the relative position of the maxilla and mandible to a target position, wherein, at the target position, the contours of the first guide surface and the second guide surface are substantially matched. When wearing the dental orthodontic appliance provided in this application, the first guide surface and the second guide surface can be gradually and progressively put into place under the action of chewing force, which can give the patient an adaptive process, slowly bite, and guide the relative position of the upper and lower jaws to the target position. Compared with the "one-step" wearing and orthodontic treatment using appliances with TB or reverse TB structure, the patient is more likely to adapt and cooperate, which is conducive to improving patient compliance and improving treatment efficiency.

[0047] The following will provide a detailed explanation in conjunction with the illustrations.

[0048] Example 1

[0049] Please refer to Figure 1 As shown, the dental orthodontic device 100 of this application includes a first shell-shaped body 1 for accommodating the patient's maxillary teeth and a first protrusion 2 protruding from the posterior tooth region of the first shell-shaped body 1, and a second shell-shaped body 3 for accommodating the patient's mandibular teeth and a second protrusion 4 protruding from the posterior tooth region of the second shell-shaped body 3. The first protrusion 2 has an inclined first guide surface 21 on the side facing the opposing occlusal surface, and the mesial and distal ends of the first guide surface 21 have a first preset height difference h1 in the gingival-occlusal direction. The second protrusion 4 has an inclined second guide surface 41 on the side facing the opposing occlusal surface, and the mesial and distal ends of the second guide surface 41 have a second preset height difference h2 in the gingival-occlusal direction. Through the height difference of the guide surfaces, when the first guide surface 21 and the second guide surface 41 interact, the orthodontic force on the opposing jaw can generate components in the sagittal and vertical directions, thereby simultaneously achieving control in both the sagittal and vertical directions. Preferably, the first preset height difference h1 and the second preset height difference h2 are equal. Of course, it is understood that during production and processing, the first preset height difference h1 and the second preset height difference h2 may not be equal due to the precision of the processing technology. If the difference between the first preset height difference h1 and the second preset height difference h2 is within a threshold range, for example, the difference is greater than 0 or less than or equal to 5 mm, it is also acceptable. When worn, the first guide surface 21 and the second guide surface 41 interact to guide the first shell-shaped body 1 and the second shell-shaped body 3 to move relative to each other in the sagittal direction, so as to adjust the relative position of the upper and lower jaws to the target position, wherein, at the target position, the contours of the first guide surface 21 and the second guide surface 41 are basically matched. Preferably, both the first guide surface 21 and the second guide surface 41 are planar. The planar design of the first guide surface 21 and the second guide surface 41 can reduce the resistance when the first guide surface 21 and the second guide surface 41 interact, making it easier to guide the first shell-shaped body 1 and the second shell-shaped body 3 to move relative to each other in the sagittal direction. In addition, the planar design can also ensure the stability of the orthodontic force transmission and avoid torque dispersion caused by curved surface contact.

[0050] In this embodiment, the first protrusion 2 is thicker at the front and thinner at the rear, meaning that the first guiding surface 21 of the first protrusion 2 is inclined downwards from the distal end towards the mesial end, and the gingival-maxillary height of the first guiding surface 21 gradually decreases from the mesial end to the distal end. The second protrusion 4 is thinner at the front and thicker at the rear, meaning that the second guiding surface 41 of the second protrusion 4 is inclined upwards from the distal end towards the mesial end, and the gingival-maxillary height of the second guiding surface 41 gradually increases from the mesial end to the distal end. When the first guiding surface 21 and the second guiding surface 41 interact, the second shell-shaped body 3 moves backwards relative to the first shell-shaped body 1 in the sagittal direction, guiding the patient's mandible to move backwards in the sagittal direction.

[0051] To further explain, when a patient wears the dental orthodontic appliance 100 of this application, during chewing, on the one hand, the first guide surface 21 and the second guide surface 41 can be gradually put into place under the action of chewing force, which can give the patient an adaptive process, slowly bite, and guide the relative position of the upper and lower jaws to the target position. Compared with the "one-step" wearing and orthodontic treatment using an appliance with a reverse TB structure, the patient is more likely to adapt and cooperate, which is conducive to improving patient compliance and improving treatment efficiency.

[0052] The degree of Class III bony malocclusion varies from patient to patient; please refer to [link / reference needed]. Figure 2As shown, the first guide surface 21 and the second guide surface 41 are adapted by setting different inclination degrees. Specifically, the first guide surface 21 and the second guide surface 41 are respectively set at a preset angle α with the patient's occlusal plane S, wherein the preset angle α is 5°-60°. The occlusal plane S is a reference plane and also an imaginary plane, referring to the imaginary plane formed by the mesial contact point of the maxillary central incisor to the mesial buccal apex of the bilateral first molars. This occlusal plane is parallel to the nasolabial line and basically bisects the intermaxillary distance. Specifically, in some embodiments, the preset angle α is 5°, which requires a smaller amount of mandibular retraction for these patients; in other embodiments, the preset angle α is 60°, which typically requires a larger amount of mandibular retraction for these patients. When using an orthodontic appliance with a reverse TB structure, the "one-step" wearing method rapidly pulls the relative position of the patient's upper and lower jaws to the target position at the moment of wearing, which is difficult for patients to accept clinically. However, using the dental orthodontic device 100 of this application, the patient can gradually wear the appliance in a "progressive" manner under the action of chewing force. During the "progressive" process, the patient can... The patient gradually adapts to a position they can accept, continuing to adapt under the influence of chewing force until the device is properly fitted. This effectively resolves the patient's resistance to "one-step" fitting. Of course, in some other embodiments, the preset angle α can also be 15°, 30°, 45°, etc., which can be selected according to the patient's specific situation. This application provides multiple options for the dental orthodontic device 100 by setting the preset angle α. According to the inventor's clinical data, a preset angle α range of 5°-60° can be applied to most patients with Class III skeletal malocclusion.

[0053] Furthermore, the preset angle α between the first guide surface 21 and the patient's occlusal plane S and the preset angle α between the second guide surface 41 and the patient's occlusal plane S are equal, that is, preferably the first guide surface 21 and the second guide surface 41 are arranged parallel to each other. This arrangement can further reduce the resistance when the first guide surface 21 and the second guide surface 41 interact, and make it easier to guide the first shell-shaped body 1 and the second shell-shaped body 3 to move relative to each other in the sagittal direction. Of course, it is understood that due to manufacturing processes and other reasons, the preset angle α between the first guide surface 21 and the patient's occlusal plane S and the preset angle α between the second guide surface 41 and the patient's occlusal plane S may not be equal. The inventors believe that an angle difference of ±5° is acceptable.

[0054] To further clarify, the target position in this application is set as follows: when the relative position of the patient's upper and lower jaws is at the target position, the incisal edges of the patient's maxillary incisors are opposite each other in the sagittal direction. Of course, it is understood that the target position can also be set as follows: when the relative position of the patient's upper and lower jaws is at the target position, the incisal edges of the patient's maxillary incisors cover the incisal edges of the mandibular incisors within a range of 1mm-3mm in the sagittal direction. It is also understood that the target position in this application can be set as any target position during the orthodontic stage. For example, during progressive mandibular retraction, the target position can be set according to the retraction amount in each stage. This application does not limit the dental orthodontic appliance of this application to the final target position; it can also be used in stages during progressive orthodontic treatment.

[0055] To further explain, in order to eliminate occlusal interference between the upper and lower jaws when adjusting their relative position, in this application, the total height H of the first protrusion 2 and the second protrusion 4 in the gingival direction satisfies the following: the preset occlusal height of the upper and lower jaws when the patient's upper and lower jaws are adjusted to the target position. That is, after the first protrusion 2 and the second protrusion 4 are respectively set in the posterior tooth area of ​​the upper and lower jaws, the total height H of the two is sufficient to eliminate the occlusal interference between the patient's upper and lower jaws. In other words, under the setting of this total height H, there is no occlusal interference between the upper and lower jaws in the patient's mouth, which provides the possibility for the mandible to retract, so as to avoid the inability to retract due to occlusal interference.

[0056] In some implementations, see Figure 1 As shown, there is no height difference between the distal end of the first protrusion 2 and the posterior tooth surface of the first shell-shaped body, and there is also no height difference between the mesial end of the second protrusion 4 and the posterior tooth surface of the second shell-shaped body; in other embodiments, see... Figure 2 As shown, it is feasible to have a certain height setting between the distal end of the first protrusion 2 and the posterior tooth surface of the first shell-shaped body, or it is feasible to have a certain height setting between the mesial end of the second protrusion 4 and the posterior tooth surface of the second shell-shaped body; the different occlusal heights can be determined clinically according to the different needs of different patients.

[0057] Further, please see Figure 3As shown, the total height H of the first protrusion 2 and the second protrusion 4 in the gingival direction is designed to open the occlusal joint of the patient's maxillary incisors and mandibular incisors in the vertical direction by 0-1.5 mm. That is, the occlusal height h3 of the mandibular incisors and mandibular incisors in the vertical direction is opened to a range greater than 0 and less than or equal to 1.5 mm, in order to relieve occlusal contact interference. For example, if the patient does not have individual teeth that are excessively elongated, the occlusal height h3 of the maxillary incisors and mandibular incisors can be greater than 0. For example, opening the occlusal height h3 by 0.1 mm can relieve occlusal interference. Similarly, it can be specifically set according to the specific situation of different patients' maxilla and mandible, for example, the occlusal height h3 can be set to open by 0.5 mm, 1 mm or 1.5 mm.

[0058] For further explanation of the proximal and distal lengths L2 of the first protrusion 2 and the second protrusion, please refer to [link / reference needed]. Figure 1 As shown, the first protrusion 2 covers the mesial end of the maxillary first premolar to the distal end of the maxillary last molar in a mesiodistal direction, and the second protrusion 4 covers the distal end of the mandibular last molar to the mesial end of the mandibular first premolar in a mesiodistal direction. In this embodiment, the distal end of the last molar refers to the distal end of the occlusal surface of the last molar, and the mesial end of the first premolar refers to the mesial end of the occlusal surface of the first premolar. In other embodiments, the distal end of the last molar may also be the farthest end of the last molar, and the mesial end of the first premolar may also be the closest end of the first premolar. For example, in children during their growth and development period, when both the upper and lower jaws have erupted their sixth teeth, the mesiodistal length L1 of the first protrusion is designed to cover the mesiomediate end of the upper fourth tooth to the distal end of the upper sixth tooth, and the mesiodistal length L2 of the second protrusion is designed to cover the distal end of the lower sixth tooth to the mesiomediate end of the lower fourth tooth. This design, on the one hand, expands the support area of ​​the first protrusion 2 and the second protrusion 4, dispersing the orthodontic force and reducing local stress concentration; on the other hand, it binds all the posterior teeth in the upper and lower jaws into a unified force distribution, allowing the lower posterior teeth to move posteriorly together, which helps achieve the desired orthodontic effect. In other embodiments, the mesiodistal length L2 of the first protrusion 2 and the second protrusion 4 covers at least two tooth positions in the posterior tooth area to ensure the stability of the upper and lower jaw occlusion; in still other embodiments, the first protrusion 2 and the second protrusion 4 cover at least the second premolar and the first molar in the posterior tooth area in the mesiodistal direction, which can be specifically set according to the patient's dental condition.

[0059] Furthermore, the mesiodistal length L1 of the first protrusion and the mesiodistal length L2 of the second protrusion are 15mm-35mm. The mesiodistal lengths L2 of the first protrusion and the second protrusion are consistent. This arrangement ensures stable contact between the upper and lower jaws. Specifically, in one embodiment, the mesiodistal lengths L1 of the first protrusion and L2 of the second protrusion are 15mm, 25mm, or 35mm, selected individually based on the specific case.

[0060] Further explanation is provided regarding the buccal-lingual width of the first protrusion 2 and the second protrusion 4. The buccal-lingual width of the first protrusion 2 can be set to 0.8-1.2 times the buccal-lingual width of the tooth it covers, and the buccal-lingual width of the second protrusion 4 can be set to 0.8-1.2 times the buccal-lingual width of the posterior tooth it covers. Specifically, if the first protrusion 2 and the second protrusion 4 are too narrow in the buccal-lingual direction, their stability is poor. The wider the first protrusion 2 and the second protrusion 4 are in the buccal-lingual direction, the higher their stability. This results in a more stable connection with the clear aligner and a more stable occlusal contact with the opposing jaw. Considering that clear aligners are usually manufactured using a thermoforming process, if the buccal-lingual width is too large, it will be difficult to remove the film. Therefore, it is not advisable to set an excessively wide buccal-lingual width. Furthermore, an excessively wide buccal-lingual dimension will also press against the patient's buccal mucosa, causing strong discomfort to the patient. Therefore, in the inventor's clinical trials, preferably, the buccal-lingual width of the first protrusion 2 and the second protrusion 4 can be set to be consistent with the buccal-lingual width of the teeth they cover, that is, the buccal-lingual width of the first protrusion 2 and the second protrusion 4 can be set to 1 times the buccal-lingual width of the posterior teeth they cover. Please refer to [reference needed]. Figure 4 As shown, the second shell-shaped body 3 and the second protrusion 4 worn on the lower jaw are used for illustration. The buccal-lingual width D of the second protrusion is basically consistent with the buccal-lingual width of the tooth it covers. In some embodiments, the buccal-lingual width D of the first protrusion 2 and the second protrusion can be set to 1.2 times the buccal-lingual width of the posterior tooth it covers. In other embodiments, the buccal-lingual width D of the first protrusion 2 and the second protrusion can be set to 0.8 times the buccal-lingual width of the posterior tooth it covers. Of course, if the invisible aligner is manufactured using additive manufacturing, the buccal-lingual width D of the first protrusion 2 and the second protrusion can be set with the guiding principle of not abutting the buccal mucosa.

[0061] Furthermore, when considering the buccal-lingual width D of the first protrusion 2 and the second protrusion, the buccal-lingual width D of the first protrusion 2 or the second protrusion can be set to be greater than or equal to the buccal-lingual width of the mesiodistal most anterior tooth it covers, and less than or equal to the buccal-lingual width of the mesiodistal most posterior tooth it covers. Preferably, the buccal-lingual width D of the first protrusion 2 or the second protrusion can be set to be equal to the buccal-lingual width of the mesiodistal most posterior tooth it covers. This setting can balance connection stability and patient wearing comfort; for example, Figure 4 As shown, the buccal-lingual width D of the second protrusion is set based on the buccal-lingual width of the patient's last mandibular tooth, namely the seventh mandibular tooth. The advantage of this setting is that it can meet the requirements of stable contact without irritating the patient's buccal mucosa.

[0062] Furthermore, the buccal-lingual width D of the first protrusion 2 and the second protrusion 4 is 6mm-12mm. The buccal-lingual width of the first protrusion 2 and the second protrusion 4 is consistent. This arrangement can ensure stable contact between the upper and lower jaws. Specifically, in one embodiment, the buccal-lingual width of the first protrusion 2 and the second protrusion 4 can be set to 6mm, 10mm or 12mm, whichever is selected according to clinical needs.

[0063] To further explain, the first protrusion 2 and the first shell-shaped body 1 are integrally formed, and the second protrusion 4 and the second shell-shaped body 3 are integrally formed. This configuration simplifies the manufacturing process, allowing for integral forming via hot-pressing or additive manufacturing; it also improves the strength of the structural components and eliminates the risk of parts falling off.

[0064] Furthermore, both the first protrusion 2 and the second protrusion 4 are hollow structures, such as the dental orthodontic device 100 formed by a hot-pressing film process followed by a demolding process. Of course, this is not limited to the hot-pressing film process; it is only used to help understand the hollow structure of this application. When both the first protrusion 2 and the second protrusion 4 are hollow structures, to increase the mechanical strength of the first protrusion 2 and the second protrusion 4, it is necessary to provide reinforcing members on the hollow structures to enhance their strength. Please refer to... Figure 5As shown, in some embodiments, the reinforcing member is a solid filler 5, such as a pre-processed dental resin block conforming to entry standards. The solid filler 5 is fixed to the hollow structure by bonding or welding. Preferably, the outer contour shape and size of the solid filler 5 are consistent with the inner contour shape and size of the hollow structure. In another embodiment, the reinforcing member can also be a two-phase filler. The two-phase filler is injected into the hollow structure in a liquid phase and then solidified into a solid phase. For example, a through hole is opened in the hollow structure to inject the two-phase filler. The two-phase filler is injected into the hollow structure in a liquid phase through the through hole. After solidification, its final state is similar to that of a structure filled with solid filler 5, which can be used for reference. Figure 5 As shown. Besides enhancing the mechanical strength of the hollow structure by filling it with a filler, it can also be achieved by adding a reinforcing member to the hollow structure. In some embodiments, the reinforcing member is a concave or convex structure formed by the concave or convex surfaces of the buccal and / or lingual sides of the hollow structure, extending along the gingival-maxillary direction. Please refer to [reference needed]. Figure 6 and Figure 7 In one embodiment shown, the buccal surface of the hollow structure of the second protrusion 4 protrudes outward to form an outwardly convex structure 6 extending along the gingival-maxillary direction, and the lingual surface of the hollow structure of the second protrusion 4 is concave inward to form a concave structure 7 extending along the gingival-maxillary direction; furthermore, the concave structure or the outwardly convex structure is provided to penetrate the buccal and / or lingual sides of the hollow structure along the gingival-maxillary direction. This arrangement can maximize the anti-deformation ability of the hollow structure in the gingival-maxillary direction, and achieve the best enhancement effect.

[0065] Of course, it is understandable that the hollow structure of the second protrusion 4 has both buccal and lingual surfaces that bulge outward to form an outwardly convex structure 6 extending along the gingival-maxillary direction; or, the hollow structure of the second protrusion 4 has both buccal and lingual surfaces that are concave inward to form a concave structure 7 extending along the gingival-maxillary direction; or, only one side of the hollow structure of the second protrusion 4 has a buccal and lingual surface that bulges outward to form an outwardly convex structure 6 extending along the gingival-maxillary direction; or, only one side of the hollow structure of the second protrusion 4 has a buccal and lingual surface that is concave inward to form a concave structure 7 extending along the gingival-maxillary direction. All of these are the solutions to be protected in this application. Similarly, the setting position and forming method of the hollow structure of the first protrusion 2 are the same as the setting position and forming method of the hollow structure of the second protrusion 4, and will not be described again here.

[0066] Furthermore, the first protrusion 2 and the first shell-shaped body 1 can also be configured separately. This separate configuration provides a way to replace the first protrusion 2 and the second protrusion 4. When it is necessary to adjust the first protrusion 2 or the second protrusion 4 according to the actual situation, only the first protrusion 2 or the second protrusion 4 needs to be replaced separately, without having to replace the first shell-shaped body 1 or the second shell-shaped body 3 together, thus saving costs.

[0067] For details, please refer to Figure 8As shown, a first mounting platform 8 protrudes from the posterior tooth region of the first shell-shaped body 1 towards the opposing jaw. The top of the first mounting platform 8 protrudes towards the opposing jaw to form a first positioning structure 81. The bottom of the first protrusion 2 is recessed towards the opposing jaw to form a second positioning structure 22 that matches the first positioning structure 81. The first protrusion 2 is positioned and fixed to the first mounting platform 8 by matching the first positioning structure 81 and the second positioning structure 22. The second protrusion 4 and the second shell-shaped body 3 are separate. The posterior tooth region of the second shell-shaped body 3 protrudes towards the opposing jaw to form a second mounting platform 9. The top of the second mounting platform 9 protrudes towards the opposing jaw to form a third positioning structure 91. The bottom of the second protrusion 4 is recessed towards the opposing jaw to form a fourth positioning structure 42 that matches the third positioning structure 91. The second protrusion 4 is positioned and fixed to the second mounting platform 9 by matching the third positioning structure 91 and the fourth positioning structure 42. Furthermore, in this embodiment, the first positioning structure 81 and the third positioning structure 91 are protruding structures with a "T"-shaped longitudinal section, and the second positioning structure 22 and the fourth positioning structure 42 are "T"-shaped groove structures that match the "T"-shaped protruding structures. The advantage of such a T-shaped match is that, while positioning, it can also restrict the first protruding part 2 from detaching from the first shell-shaped body 1 vertically upward, and restrict the second protruding part 4 from detaching from the second shell-shaped body 3 vertically upward. During installation, the first protrusion 2 and the second protrusion 4 can be aligned with the "T"-shaped protrusion structure and the "T"-shaped groove structure, and then pushed from the buccal side to the lingual side for installation. Furthermore, medical adhesive can be used for further fixation. For example, medical adhesive can be applied to the bottom surfaces of the first protrusion 2 and the second protrusion 4. After installation, the adhesive can further strengthen the fixation effect between the first protrusion 2 and the first mounting platform 8, and between the second protrusion 4 and the second mounting platform 9, thereby making the dental orthodontic device 100 more secure after assembly. Of course, it is understood that the first positioning structure 81 and the third positioning structure 91, in addition to the "T"-shaped protrusion structure described in this embodiment, can be any other type or type of protrusion structure. For example, the cross-section of the protrusion structure can be polygonal, elliptical, or irregular. There is no limitation on the specific structure; any protrusion structure that can achieve positioning matching with the second positioning structure 22 and the fourth positioning structure 42 can be implemented.

[0068] In other embodiments, the first positioning structure (not shown in the figure) may also be a groove structure formed by the top surface of the first mounting platform 8 being concave in the direction of the jaw. Correspondingly, the second positioning structure 22 is a protrusion structure formed by the bottom surface of the first protrusion 2 being convex outward in the direction of the opposing jaw and matching the first positioning structure. Similarly, the third positioning structure may also be a groove structure formed by the top surface of the second mounting platform 9 being concave in the direction of the jaw. Correspondingly, the fourth positioning structure 42 is a protrusion structure formed by the bottom surface of the second protrusion 4 being convex outward in the direction of the opposing jaw and matching the third positioning structure.

[0069] Furthermore, the material stiffness of the first mounting platform 8 is greater than that of the first protrusion 2, and the material stiffness of the second mounting platform 9 is greater than that of the second protrusion 4. This stiffness setting can increase the stability of the first mounting platform 8 and the second mounting platform 9 in providing support to the first protrusion 2 and the second protrusion 4, respectively.

[0070] In some embodiments, a dental arch portion 10 is provided on the lingual side of the posterior tooth region of the first shell-shaped body 1. The two ends of the dental arch portion 10 are respectively connected to the gingival margin or adjacent to the gingival margin on the lingual side of the posterior tooth region on the left and right sides of the first shell-shaped body 1. The dental arch portion 10 applies force to the posterior tooth region of the first shell-shaped body 1 through elastic deformation, thereby applying an expanding or contracting force to the multiple teeth contained within the first shell-shaped body 1. In this way, dental arch morphology adjustment and jawbone position correction can be achieved simultaneously, shortening the treatment cycle. The dental arch portion 10 is strip-shaped, spanning the palate and connecting the teeth on both sides of the posterior tooth region. Its width can cover the width of at least one tooth. Specifically, please refer to... Figure 9 As shown, the width of the dental arch portion 10 covers the posterior tooth region, including tooth #6, part of the distal portion of tooth #5, and part of the mesial portion of tooth #7. Of course, it can also connect to other teeth in the posterior tooth region, and can include one or more teeth; these are not listed here. Furthermore, in this embodiment, the dental arch portion 10 is also provided with a reinforcing structure 11 to enhance its mechanical strength. The reinforcing structure 11 spans the length direction of the dental arch portion 10. Preferably, the reinforcing structure 11 penetrates the length direction of the dental arch portion 10, thus achieving the best reinforcing effect and the strongest resistance to deformation along the length direction. Of course, it is understood that the reinforcing structure 11 is not mandatory; for example, when the mechanical strength of the dental arch portion 10 is sufficient, the reinforcing structure 11 is unnecessary.

[0071] Example 2

[0072] To achieve the purpose of this invention, this application also provides a dental orthodontic device 100, which differs from Embodiment 1 in that it targets a different type of malocclusion and adjusts the direction of mandibular sagittal alignment.

[0073] For details, please refer to Figure 10 As shown, in this embodiment, the first protrusion 2 is thinner at the front and thicker at the back, meaning that the first guiding surface 21 of the first protrusion 2 is inclined upwards from the distal end towards the mesial end, and the gingival-maxillary height of the first guiding surface 21 gradually increases from the mesial end to the distal end; the second protrusion 4 is thicker at the front and thinner at the back, meaning that the second guiding surface 41 of the second protrusion 4 is inclined downwards from the distal end towards the mesial end, and the gingival-maxillary height of the second guiding surface 41 gradually decreases from the mesial end to the distal end. When the first guiding surface 21 and the second guiding surface 41 interact, the second shell-shaped body 3 moves forward in the sagittal direction relative to the first shell-shaped body 1, guiding the patient's mandible to move forward in the sagittal direction, which is beneficial for the correction of Class II malocclusion. When a patient wears the dental orthodontic appliance 100 of this application, the first guide surface 21 and the second guide surface 41 can be gradually and progressively fitted into place under the action of chewing force during chewing. This provides the patient with an adaptive process, allowing for slow biting and guiding the relative position of the upper and lower jaws to the target position. Compared to using an orthodontic appliance with a TB structure for "one-step" fitting and treatment, the patient is more likely to adapt and cooperate, which helps to improve patient compliance and treatment efficiency.

[0074] The other technical features of Embodiment 2 are the same as those of Embodiment 1, and will not be repeated here.

[0075] It should be noted that the above embodiments can be freely combined as needed to form different new implementation schemes without causing contradictions. All implementation schemes formed by such combinations are within the protection scope of this application. In order to save space in the application text, they will not be described in detail here.

[0076] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the inventive principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this application.

[0077] Similarly, the above descriptions are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dental orthodontic appliance, characterized in that, include: A first shell-shaped body for accommodating the patient's maxillary teeth and a first protrusion protruding from the posterior tooth region of the first shell-shaped body; and a second shell-shaped body for accommodating the patient's mandibular teeth and a second protrusion protruding from the posterior tooth region of the second shell-shaped body. The first protrusion has an inclined first guide surface on the side facing the occlusal surface. The first guide surface is planar, and the proximal and distal ends of the first guide surface have a first preset height difference in the gingival-occlusal direction. The second protrusion has an inclined second guide surface on the side facing the opposing occlusal surface. The second guide surface is planar, and its proximal and distal ends have a second predetermined height difference in the gingival-occlusal direction; and, The difference between the first preset height difference and the second preset height difference is within the threshold range; When worn, the first guide surface and the second guide surface interact to guide the first shell-shaped body and the second shell-shaped body to move relative to each other in the sagittal direction, so as to adjust the relative position of the upper and lower jaws to the target position, wherein the contours of the first guide surface and the second guide surface are substantially matched at the target position.

2. The dental orthodontic device according to claim 1, characterized in that, The gingival-maxillary height of the first guiding surface gradually decreases from the mesial end to the distal end, while the gingival-maxillary height of the second guiding surface gradually increases from the mesial end to the distal end. When the first guiding surface and the second guiding surface interact, the second shell-like body moves backward relative to the first shell-like body in the sagittal direction, guiding the patient's mandible to move backward in the sagittal direction.

3. The dental orthodontic device according to claim 1, characterized in that, The gingival-maxillary height of the first guiding surface gradually increases from the mesial end to the distal end, while the gingival-maxillary height of the second guiding surface gradually decreases from the mesial end to the distal end. When the first guiding surface and the second guiding surface interact, the second shell-like body moves forward relative to the first shell-like body in the sagittal direction, guiding the patient's mandible to move forward in the sagittal direction.

4. The dental orthodontic device according to any one of claims 1 to 3, characterized in that, The first guide surface and the second guide surface are respectively set at a preset angle to the patient's occlusal plane, wherein the preset angle is 5°-60°.

5. The dental orthodontic appliance according to any one of claims 1 to 3, characterized in that, The target position is: the incisal edges of the maxillary incisors and the mandibular incisors are opposite each other in the sagittal direction.

6. The dental orthodontic device according to any one of claims 1 to 3, characterized in that, The total height of the first protrusion and the second protrusion in the gingival-maxillary direction satisfies the preset maxillary occlusal height when the patient's upper and lower jaws are adjusted to the target position.

7. The dental orthodontic appliance according to any one of claims 1 to 3, characterized in that, The total height of the first and second protrusions in the gingival direction is such that it can open the bite of the patient's maxillary incisors and mandibular incisors in the vertical direction by 0-1.5 mm.

8. The dental orthodontic appliance according to any one of claims 1 to 3, characterized in that, The first protrusion and the second protrusion cover at least two teeth in the posterior region in the mesiodistal direction.

9. The dental orthodontic device according to claim 8, characterized in that, The first protrusion and the second protrusion cover at least the second premolar and the first molar in the mesiodistal direction of the posterior tooth region.

10. The dental orthodontic device according to claim 8, characterized in that, The first protrusion covers the mesial end of the maxillary first premolar to the distal end of the maxillary last molar in a mesiodistal direction, and the second protrusion covers the distal end of the mandibular last molar to the mesial end of the mandibular first premolar in a mesiodistal direction.

11. The dental orthodontic appliance according to any one of claims 1 to 3, characterized in that, The mesial-to-distal length of the first protrusion and the mesial-to-distal length of the second protrusion are 15mm-35mm.

12. The dental orthodontic device according to any one of claims 1 to 3, characterized in that, The buccal-lingual width of the first protrusion is 0.8-1.2 times the buccal-lingual width of the tooth it covers, and the buccal-lingual width of the second protrusion is 0.8-1.2 times the buccal-lingual width of the posterior tooth it covers.

13. The dental orthodontic device according to claim 12, characterized in that, The buccal-lingual width of the first protrusion and the second protrusion is greater than or equal to the buccal-lingual width of the most anterior mesiodistal tooth they cover, and less than or equal to the buccal-lingual width of the most posterior mesiodistal tooth they cover.

14. The dental orthodontic appliance according to any one of claims 1 to 3, characterized in that, The cheek-tongue width of the first protrusion and the second protrusion is 6mm-12mm.

15. The dental orthodontic appliance according to any one of claims 1 to 3, characterized in that, The first protrusion and the first shell-shaped body are integrally formed, and the second protrusion and the second shell-shaped body are integrally formed.

16. The dental orthodontic device according to claim 15, characterized in that, Both the first protrusion and the second protrusion are hollow structures, and a reinforcing member is provided on the hollow structure to enhance its strength; wherein, the reinforcing member is a solid phase filler, which is fixed in the hollow structure by bonding or welding, or, the reinforcing member is a two-phase filler, which is injected into the hollow structure in liquid phase and then solidifies into solid phase, or, the reinforcing member is an inward or outward structure formed by the inward or outward concavity of the buccal and / or lingual surfaces of the hollow structure extending along the gingival-maxillary direction.

17. The dental orthodontic device according to claim 16, characterized in that, When the reinforcing member is a concave or convex structure extending along the gingival direction, the concave or convex structure penetrates the buccal and / or lingual sides of the hollow structure along the gingival direction.

18. The dental orthodontic appliance according to any one of claims 1 to 3, characterized in that, The first protrusion and the first shell-shaped body are separate components. The posterior tooth region of the first shell-shaped body protrudes towards the opposing jaw to form a first mounting platform. The top of the first mounting platform protrudes towards the opposing jaw to form a first positioning structure. The bottom of the first protrusion is recessed towards the jaw to form a second positioning structure that matches the first positioning structure. The first protrusion is positioned and bonded to the first mounting platform by matching the first positioning structure and the second positioning structure. The second protrusion and the second shell-shaped body are separate components. The posterior tooth region of the second shell-shaped body protrudes towards the opposing jaw to form a second mounting platform. The top of the second mounting platform protrudes towards the opposing jaw to form a third positioning structure. The bottom of the second protrusion is recessed towards the jaw to form a fourth positioning structure that matches the third positioning structure. The second protrusion is positioned and bonded to the second mounting platform by matching the third positioning structure and the fourth positioning structure.

19. The dental orthodontic device according to claim 18, characterized in that, The material stiffness of the first mounting platform is greater than that of the first protrusion, and the material stiffness of the second mounting platform is greater than that of the second protrusion.

20. The dental orthodontic appliance according to any one of claims 1 to 3, characterized in that, The first shell-shaped body has a dental arch on the lingual side of the posterior tooth region. The two ends of the dental arch are respectively connected to the gingival margin or adjacent to the gingival margin on the lingual side of the posterior tooth region on the left and right sides of the first shell-shaped body. The dental arch applies force to the posterior tooth region of the first shell-shaped body through elastic deformation, so as to apply an expansion force or a contraction force to the multiple teeth contained in the first shell-shaped body.

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