Lower jaw advancing device with adjusting part

Abstract

The utility model relates to a mandibular advancement device with an adjusting part, which comprises an upper tray assembly, a lower tray assembly and the adjusting part, and the upper tray assembly comprises an upper support and an upper moldable part; the lower tray assembly comprises a lower bracket and a lower moldable part; the upper tray assembly and / or the lower tray assembly are / is made of at least two different materials; the adjusting part is configured to connect the upper tray assembly and the lower tray assembly in a buckling manner and adjust the position of the lower tray assembly relative to the position of the upper tray assembly; specifically, the buckling mode is that at least one protrusion is arranged on one side of the upper tray assembly and / or one side of the lower tray assembly, and the protrusions are configured to be connected with the upper support and the lower support in an extrusion mode.

Description

Technical Field

[0001] This invention relates to a mandibular advancement device, and more particularly to a device for preventing, reducing or eliminating snoring and / or obstructive sleep apnea. Background Art

[0002] There is a close link between snoring and sleep apnea and obstructive sleep apnea (OSA), as snoring is often a common symptom or precursor of OSA. OSA is a sleep disorder characterized by pauses or reductions in breathing during sleep due to partial or complete obstruction of the upper airway. This obstruction is usually caused by the relaxation of soft tissues during sleep, the collapse of the tongue base and soft palate, resulting in restricted airflow. Snoring is essentially due to the vibration of the obstructed airflow in a restricted space, producing a characteristic noise. This obstruction can be partial or completely block the airway. When the airway is completely blocked, sleep apnea occurs, resulting in a brief cessation of breathing, which causes oxygen deficiency in the brain and body and interrupts the normal sleep cycle. Although snoring and sleep apnea can be regarded as common phenomena to some extent, when their occurrence frequency increases or becomes severe enough to affect sleep quality and health, attention needs to be paid. Especially in the case of OSA, this obstruction may occur dozens or even hundreds of times, triggering multiple apneas every night, seriously disturbing sleep. This not only causes excessive daytime sleepiness and inattention in users, but also increases the risk of chronic diseases such as cardiovascular diseases and diabetes.

[0003] The severity of obstructive sleep apnea (OSA) cannot be underestimated, as it can have a wide and serious impact on the health and life of users. OSA is a common but underestimated sleep disorder, and its severity can range from mild to severe. One of the symptoms is an increased risk of cardiovascular diseases. The continuous airway obstruction leads to a decrease in blood oxygen levels, causing an increase in blood pressure and the load on the cardiovascular system, thus increasing the risk of cardiovascular diseases. In addition, OSA is also closely related to metabolic diseases such as diabetes and obesity, and may lead to a decline in cognitive function, emotional and mental health problems, as well as an increased risk of dangerous behaviors and accidents. Facing the severity of OSA, treatment becomes particularly important.

[0004] Currently, there are multiple options for treating snoring, sleep apnea, or obstructive sleep apnea (OSA). Among them, continuous positive airway pressure (CPAP) therapy is one of the most commonly used methods, but it has drawbacks such as inconvenience in use, adaptation problems, mask leakage, and sleep interference. Therefore, some users turn to oral appliances as an alternative method. Among them, the mandibular advancement device (MAD) is a common oral appliance. This device improves the airflow in the throat passage by adjusting the position of the mandible relative to the maxilla, thereby improving sleep quality and reducing or eliminating the symptoms of snoring and / or sleep apnea.

[0005] The main limitation of the mandibular advancement device is that its manufacturing process requires a custom model based on the user's teeth or oral cavity. Given the uniqueness of each person's oral structure and tooth position, the custom model is designed to ensure the fit of the mandibular advancement device to the user's teeth and oral cavity to provide the best effect and comfort. However, this customization process usually requires assembly, molding, or adjustment by dental professionals and manufacturing laboratories, which is not only time-consuming and laborious but also costly.

[0006] With the development of digital technology, other methods for customizing mandibular advancement devices have emerged, such as oral scanning technology combined with computer-aided design and manufacturing (CAD / CAM) or 3D printing technology. Although these methods have shortened the production time, they still require the participation of dental professionals and manufacturing laboratories. In addition, although these methods may reduce a part of the cost, their overall cost is still relatively high. Summary of the Utility Model

[0007] In view of the above limitations, the present utility model provides a mandibular advancement device that is durable, easy to wear, and easy to use. This device can adapt to the user's tooth structure and reduces the production cost. Secondly, the objective of the present utility model is to provide a comfortable solution that effectively alleviates the symptoms of snoring and / or sleep apnea. Most importantly, the present utility model provides a simple and easy-to-use mandibular advancement device, which can be easily used and worn even by ordinary non-technical users without relying on dental professionals and manufacturing laboratories for an expensive and time-consuming customization process, thereby reducing the user's cost of use.

[0008] A mandibular advancement device with an adjustment part, comprising:

[0009] The shape of the upper tray assembly is arched to conform to the curve of the user's maxillary dentition;

[0010] The shape of the lower tray assembly is arched to conform to the curve of the user's mandibular dentition;

[0011] The upper tray assembly includes an upper bracket and an upper plasticizable component;

[0012] The lower tray assembly includes a lower bracket and a lower plastically deformable member;

[0013] The upper tray assembly and / or the lower tray assembly are made of at least two different materials;

[0014] An adjusting portion, configured to connect the upper tray assembly and the lower tray assembly in a snap-fit manner and adjust the position of the lower tray assembly relative to the upper tray assembly;

[0015] Wherein, the snap-fit form is specifically that at least one protrusion is provided on one side of the upper tray assembly and / or the lower tray assembly, and the protrusion is configured to squeeze and connect the upper bracket and the lower bracket.

[0016] In one embodiment, the upper tray assembly is for contacting the maxillary dentition of the user.

[0017] In one embodiment, the lower tray assembly is for contacting the mandibular dentition of the user.

[0018] In one embodiment, the upper plastically deformable member is configured to be softened after being heated so as to be adjusted and shaped into a shape matching the maxillary dentition of the user when the user bites.

[0019] In one embodiment, the lower plastically deformable member is configured to be softened after being heated so as to be adjusted and shaped into a shape matching the mandibular dentition of the user when the user bites.

[0020] The present utility model also discloses a mandibular advancement device with an adjusting portion, including:

[0021] The upper tray assembly includes an upper bracket and an upper plastically deformable member;

[0022] The lower tray assembly includes a lower bracket and a lower plastically deformable member;

[0023] The upper tray assembly and / or the lower tray assembly are made of at least two different materials;

[0024] An adjusting portion, configured to connect the upper tray assembly and the lower tray assembly in a snap-fit manner and adjust the position of the lower tray assembly relative to the upper tray assembly;

[0025] Wherein, the snap-fit form is specifically that at least one protrusion is provided on one side of the upper tray assembly and / or the lower tray assembly, and the protrusion is configured to squeeze and connect the upper bracket and the lower bracket;

[0026] Wherein, the upper bracket and the lower bracket have inner walls and outer walls, and the distance between the inner walls and the outer walls is at least partially 0.3 - 8 mm.

[0027] In one embodiment, the protrusion is disposed on the outer wall surface of the upper bracket, and the protrusion receiving portion is disposed on the outer wall surface of the lower bracket and is opposite to the protrusion.

[0028] In one embodiment, the protrusion is disposed on the outer wall surface of the lower bracket, and the protrusion receiving portion is disposed on the outer wall surface of the upper bracket and is opposite to the protrusion.

[0029] In one embodiment, at least a part of the upper deformable member and the lower deformable member is made of a flexible thermoplastic material.

[0030] In one embodiment, the upper bracket and the lower bracket are at least partially made of a relatively rigid material compared to the upper deformable member and the lower deformable member.

[0031] The present utility model also discloses a mandibular advancement device with an adjustment portion, comprising:

[0032] The upper tray assembly includes an upper bracket and an upper deformable member;

[0033] The lower tray assembly includes a lower bracket and a lower deformable member;

[0034] The upper tray assembly and / or the lower tray assembly is made of at least two different materials;

[0035] The adjustment portion is configured to connect the upper tray assembly and the lower tray assembly in a snap - fit form and adjust the position of the lower tray assembly relative to the upper tray assembly;

[0036] Wherein, the inner walls of the upper bracket and the lower bracket form an angle with the horizontal plane in the range of 20 - 150°.

[0037] In one embodiment, the sum of the weights of the upper bracket and the lower bracket is between 3 - 50 g.

[0038] In one embodiment, the overall weight range of the mandibular advancement device is between 8 - 80 g.

[0039] In one embodiment, the snap - fit structure of the adjustment portion adopts an I - shape, an F - shape, an E - shape or a symmetric E - shape.

[0040] In one embodiment, the adjustment portion can adjust multiple gears.

[0041] The present utility model also discloses a mandibular advancement device with an adjustment portion, comprising:

[0042] The upper tray assembly includes an upper bracket and a plastically deformable upper member;

[0043] The lower tray assembly includes a lower bracket and a plastically deformable lower member;

[0044] At least two different materials are used to make the upper tray assembly and / or the lower tray assembly;

[0045] The adjusting part is configured to connect the upper tray assembly and the lower tray assembly in a snap - fit form and adjust the position of the lower tray assembly relative to the upper tray assembly;

[0046] Wherein, the upper bracket and the lower bracket have an inner wall, an outer wall and a bottom wall;

[0047] The upper bracket and the lower bracket have one or more of the following characteristics:

[0048] The vertical distance between the inner wall, the outer wall and the bottom wall is 0.5 - 20 mm;

[0049] The perimeter of the outer wall ranges from 2 to 200 mm;

[0050] The area of the outer wall ranges from 50 to 2000 square millimeters.

[0051] In one embodiment, the thickness of the bottom walls of the upper bracket and the lower bracket is both 0.5 - 20 mm.

[0052] In one embodiment, the upper tray assembly and / or the lower tray assembly includes channel columns. When the upper tray assembly and the lower tray assembly are combined, the gaps between the upper and lower tray assemblies and the channel columns together form an air flow channel.

[0053] In one embodiment, the number of the channel columns is odd.

[0054] In one embodiment, the number of the air flow channels is even and has a symmetric structure.

[0055] Implementing the mandibular advancement device with an adjusting part of the present utility model has at least the following beneficial effects:

[0056] 1) Mandibular advancement devices usually require relatively precise distance adjustment. Precise distance adjustment can effectively avoid the risk of over-adjustment, which may lead to excessive advancement distance, causing soreness and discomfort in the mandibular joint and the oral cavity, and even potentially triggering problems such as mandibular joint disorders, oral ulcers, and other soft tissue contusions. Secondly, by gradually increasing the mandibular advancement distance through precise adjustment, users can adapt to the device more easily, and the wearing process is more comfortable, thus improving compliance and willingness to wear. In addition, the gradual increase in the mandibular advancement distance through precise adjustment helps users better adapt to the treatment process and ultimately improves the treatment effect of the device. There are also other structures on the market that can be precisely adjusted, but there are still many problems. For example, although bolt adjustment can be precisely adjusted, due to the addition of extra small parts, the bolts are prone to loosening. Once they fall off, they may enter the esophagus or even the airway from the oral cavity, posing a relatively high potential danger. There is also another structure of an external connecting arm. If it is made of rigid material, it is easy to scratch the oral cavity edge; while if it is made of flexible material, it is prone to loosening and difficult to fix. The gear structure is similar in appearance to the buckle structure, but its composition is different. Usually, it is necessary to push forcefully back and forth to adjust the advancement distance, and the gear structure needs to be made of relatively rigid material to avoid loosening or wear. Commonly, polycarbonate (PC) material is used. However, mandibular advancement devices usually require heating and shaping of the shapeable parts, and PC material will produce bisphenol A when heated, thus causing harm to the human body. In addition, it is difficult to align the relatively thin gear edges left and right, which may lead to inconsistent advancement distances on the left and right, thus affecting the treatment effect. To solve these problems, the present utility model adopts a buckle structure with special designs such as I-shaped, F-shaped, E-shaped, and symmetric E-shaped. The special buckle design can not only ensure the wall thickness required during the production process but also ensure the structural stability. Whether it is I-shaped, F-shaped, E-shaped, or symmetric E-shaped, they are all integral structures fixed by upper and lower buckling, so they are easier to operate during the joining process. The buckle structure of the present utility model provides a more reliable and flexible solution, meeting the precise requirements of the mandibular advancement device for distance adjustment, ensuring the stability of the function of the mandibular advancement device, and at the same time facilitating the operation and adjustment of users.

[0057] 2) The utility model adopts an integral buckle structure, enabling a multi-gear adjustment design on the same bracket. This design allows users to adjust the forward movement distance of the lower tray assembly according to their personal circumstances to select the most effective and comfortable position, thereby enhancing the compliance of the mandibular advancement device. Compared with using multiple different upper and lower bracket combinations, the utility model adopts a buckle structure with special designs such as I-shaped, F-shaped, E-shaped, and symmetric E-shaped. With only a pair of upper and lower brackets, it can achieve a more refined and multi-gear forward movement distance adjustment. This design not only eliminates the need for multiple brackets but also enables more gears of adjustment on the same bracket while ensuring the fineness of the adjustment range. This innovation provides a more economical and simpler solution, greatly reducing costs and operational complexity.

[0058] 3) The mandibular advancement devices on the existing market still have the problem of easy detachment. Feedback from a large number of users shows that during sleep, the mandibular advancement device often separates from the teeth, resulting in device detachment. Through test analysis, it is found that this detachment problem is mainly due to the need for the lower tray assembly to move forward relative to the upper tray assembly, and users may move or unconsciously open and close their mouths during sleep, all of which may cause the mandibular advancement device to be easily detached. Therefore, to solve this problem, the upper and lower tray assemblies need to have sufficient supporting force in the front and rear positions to ensure that the device can be firmly held in place during use. In addition, there are certain angular differences between each tooth, and they are not necessarily perpendicular to the horizontal plane. For example, the anterior teeth (central incisors and lateral incisors) usually have a certain labial inclination relative to the horizontal vertical plane, with an inclination angle of about 10 - 25°; the inclination angle of the canine teeth (labial direction) is usually between 5 - 15°; and the inclination angle of the molars (labial direction) is usually between 0 - 5°. The anterior teeth and canine teeth have a relatively large angle relative to the horizontal vertical plane, while the molars have a relatively small angle. This results in different supporting forces required for different teeth during occlusion. The existing mandibular advancement devices usually set the inner and outer walls of the bracket perpendicular to the bottom wall, and this design cannot conform to the natural shape of the teeth, leading to problems such as discomfort and easy detachment during wearing. Another common mandibular advancement device bracket is only composed of the bottom wall without inner and outer walls in the front and rear positions. This design lacks sufficient supporting force, making it easier for the teeth to slip out of the mandibular advancement device. After multiple tests on users with various tooth morphologies, the utility model provides an improved bracket design. The bracket has an inner wall and an outer wall to provide sufficient supporting force. In addition, an angle is formed between the inner wall of the bracket and the bottom wall to adapt to the natural angle of the anterior teeth inclined towards the lip side, thus better conforming to the shape of the teeth. Through this structural design, the mandibular advancement device of the utility model shows remarkable stability during the experiment, reducing the possibility of device detachment. At the same time, this design improves the wearing comfort and effectiveness, solving the main problems of existing products. Brief Description of the Drawings

[0059] Figure 1 Schematic structural diagram of the mandibular advancement device in an embodiment of the present utility model;

[0060] Figure 2 Exploded schematic structural diagram of the mandibular advancement device in an embodiment of the present utility model;

[0061] Figure 3 Schematic diagrams of the horizontal plane, sagittal plane, and coronal plane in multiple embodiments of the present utility model;

[0062] Figure 4 Top view of the combination of the upper bracket and the lower bracket in multiple embodiments of the present utility model;

[0063] Figure 5 In an embodiment of the present utility model, the bracket is in Figure 4 Cross-sectional view in the A-A direction;

[0064] Figure 6 Schematic diagram of the position of the channel column of the mandibular advancement device in an embodiment of the present utility model;

[0065] Figure 7 Schematic diagram of the number of channel columns of the mandibular advancement device in an embodiment of the present utility model;

[0066] Figure 8 Separation schematic diagram of the upper bracket and the lower bracket in an embodiment of the present utility model;

[0067] Figure 9 In an embodiment of the present utility model, the bracket is in Figure 4 Cross-sectional view in the B-B direction;

[0068] Figure 10 Cross-sectional schematic diagram of the shape of the adjustment part in an embodiment of the present utility model;

[0069] Figure 11 Exploded schematic structural diagram of the mandibular advancement device in the first embodiment of the present utility model;

[0070] Figure 12 Cross-sectional schematic diagram of the adjustment part in the first embodiment of the present utility model;

[0071] Figure 13 Cross-sectional schematic diagram of the adjustment part in the first embodiment of the present utility model;

[0072] Figure 14 Enlarged cross-sectional schematic diagram of the adjustment part in the first embodiment of the present utility model;

[0073] Figure 15Schematic exploded view of the mandibular advancement device in Embodiment 2 of the present utility model;

[0074] Figure 16 Schematic cross-sectional view of the adjustment part in Embodiment 2 of the present utility model;

[0075] Figure 17 Schematic cross-sectional view of the adjustment part in Embodiment 2 of the present utility model;

[0076] Figure 18 Enlarged schematic cross-sectional view of the adjustment part in Embodiment 2 of the present utility model. Detailed implementation manners

[0077] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0078] The present utility model provides a mandibular advancement device 1 having an adjustment part 4, including an upper tray assembly 2, a lower tray assembly 3 and an adjustment part 4. The shapes of the upper tray assembly 2 and the lower tray assembly 3 are arched to conform to the dental arch curve of the user. Among them, the upper tray assembly 2 is used to contact the upper dental arch of the user; the lower tray assembly 3 is used to contact the lower dental arch of the user.

[0079] The upper tray assembly 2 and / or the lower tray assembly 3 are made of at least two different materials. The materials for the upper tray assembly 2 and the lower tray assembly 3 have a wide selection range, and plastic or polymer materials applicable to oral medical devices and capable of being molded can be used. These materials include but are not limited to polypropylene (PP), polycarbonate (PC), polyethylene terephthalate (PET), polymethacrylate (PMMA), polyphenylsulfone (PPSU), polyethylene (PE), high-density polyethylene (HDPE), low-density polyethylene (LDPE), ethylene-vinyl acetate copolymer (EVA), thermoplastic polyurethane (TPU), styrene-ethylene-butene-styrene (SEBS), styrene-ethylene-styrene (SEPS), silicone rubber, etc. Each component of the upper tray assembly 2 and the lower tray assembly 3 can be made of a single material or a combination of multiple materials. This design of combining multiple materials can make full use of the characteristics of different materials to meet various requirements during the use of the mandibular advancement device 1. Polymer materials may contain various fillers, plasticizers, stabilizers, pigments, and other additives to meet different performance requirements and manufacturing needs. For example, nano-scale fillers can be added to enhance the strength and hardness of the material, or antibacterial agents can be added to improve the hygienic performance of the oral appliance.

[0080] Specifically, please refer to Figures 1 to 4 , the upper tray assembly 2 includes an upper bracket 21 and an upper shapeable component 22. Among them, the upper shapeable component 22 is made of a flexible thermoplastic material, which can be softened after being heated so as to be adjusted and shaped to match the user's maxillary dentition when the user bites. The upper bracket is made of a relatively rigid material at least in part compared with the upper shapeable component. The lower tray assembly 3 includes a lower bracket 31 and a lower shapeable component 32. Among them, the lower shapeable component 32 is made of a flexible thermoplastic material, which can be softened after being heated so as to be adjusted and shaped to match the user's mandibular dentition when the user bites. The lower bracket is made of a relatively rigid material at least in part compared with the lower shapeable component. In the present utility model, the tray assemblies 2 and 3 include the upper tray assembly 2 and the lower tray assembly 3, the brackets 21 and 31 include the upper bracket 21 and the lower bracket 31, and the shapeable components 22 and 32 include the upper shapeable component 22 and the lower shapeable component 32.

[0081] The present utility model allows for the adaptability adjustment of the mandibular advancement device 1 using a simple heating method. The preferred method is the "boiling and biting" method. The user only needs to put the mandibular advancement device 1 into hot water for heating, and then gently bite the mandibular advancement device 1 with the mouth to make it fit well with the user's teeth.

[0082] The shapeable components 31 and 32 soften after being heated, enabling the user to adjust and adapt more easily when first wearing the mandibular advancement device 1. This simple heating method allows the user to conveniently perform the adaptability adjustment by themselves without professional skills, thus improving the user's comfort and wearing experience.

[0083] The brackets 21 and 31 are partially made of relatively rigid materials to ensure the stability and support force of the overall structure of the mandibular advancement device 1, while the shapeable components 22 and 32 are made of thermoplastic materials to provide comfort and plasticity. To ensure the stability of the mandibular advancement device 1 during use, the heat distortion temperature of the materials of the brackets 21 and 31 is higher than that of the shapeable components 22 and 32 to avoid affecting the structure of the brackets 21 and 31 during the heating process. This choice of material combination aims to improve the balance of stability and comfort and ensure proper adjustment according to the dental arch during use.

[0084] To further increase the comfort of the user wearing the mandibular advancement device 1, furthermore, the mandibular advancement device 1 in this embodiment is made of lightweight materials. As Figure 5 shown, the brackets 21 and 31 have inner walls 211, 311, outer walls 212, 312, and bottom walls 213, 313. The overall weight of the brackets ranges between 3 - 50 g, and the overall weight of the mandibular advancement device 1 ranges between 8 - 80 g. The distance between the inner walls 211, 311 and the outer walls 212, 312 is at least part of 0.3 - 8 mm, that is, Figure 5 w1 in Figure 5 and the thickness of the bottom walls 213, 313 is 0.5 - 20 mm, that is, w2 in Among them, preferably, the distance between the inner walls 211, 311 and the outer walls 212, 312 is 1 - 1.6 mm, and the thickness of the bottom walls 213, 313 is 1 - 2 mm. Through this design, it can not only ensure the support force and stiffness required for the mandibular advancement device 1 but also avoid the brackets 21 and 31 being too heavy, thereby reducing the weight of the mandibular advancement device 1, reducing the burden on the oral cavity, and improving comfort.

[0085] The existing mandibular advancement device 1 on the market still has the problem of being prone to detachment. A large number of user feedback indicates that during sleep, the mandibular advancement device 1 often separates from the teeth, resulting in the device falling off. Through testing and analysis, it is found that this detachment problem is mainly due to the lower tray assembly 3 needing to move forward relative to the upper tray assembly 2, and the user may move or unconsciously open and close the mouth during sleep, all of which may cause the mandibular advancement device 1 to be prone to detachment. Therefore, to solve this problem, the upper and lower tray assemblies 2 and 3 need to have sufficient supporting force in the front and rear positions to ensure that the device can be firmly held in place during use. In addition, each tooth has a certain angular difference and is not necessarily perpendicular to the horizontal plane. For example, the anterior teeth (central incisors and lateral incisors) usually have a certain inclination towards the lip relative to the horizontal vertical plane, and the inclination angle is about 10 - 25°; the inclination angle of the canine teeth (in the labial direction) is usually between 5 - 15°; the inclination angle of the molar teeth (in the labial direction) is usually between 0 - 5°. The anterior teeth and canine teeth have a relatively large angle relative to the horizontal vertical plane, while the molar teeth have a relatively small angle relative to the horizontal vertical plane, which results in different supporting forces required for different teeth during occlusion. The existing mandibular advancement devices usually set the inner and outer walls of the bracket perpendicular to the bottom wall, and this design cannot conform to the natural shape of the teeth, resulting in problems such as discomfort and easy detachment during wearing. Another common mandibular advancement device bracket is only composed of the bottom wall and does not set inner and outer walls in the front and rear positions. This design does not have enough supporting force, making it easier for the teeth to slip out of the mandibular advancement device. After multiple tests on users with various tooth morphologies, the present utility model provides an improved bracket design, as Figure 5 shown, the brackets 21 and 31 have inner walls 211 and 311 and outer walls 212 and 312 to provide sufficient supporting force. Among them, the vertical distance between the inner walls 211 and 311, the outer walls 212 and 312 and the bottom walls 213 and 313 is 0.5 - 20 mm, that is Figure 5 h1 in, the perimeter range of the outer walls 212 and 312 is 2 - 200 mm, and the area range of the outer walls 212 and 312 is 50 - 2000 square millimeters. In addition, the included angle formed by the inner walls 211 and 311 of the bracket and the horizontal plane (in the direction towards the same outer wall 212, such as the inner wall 211 towards the outer wall 312) ranges from 20 - 150°, that is Figure 5 the angle α in, to adapt to the natural angle of the anterior teeth inclined towards the lip, so as to fit the shape of the teeth more closely. Among them, preferably, the included angle formed by the inner walls 211 and 311 of the bracket and the horizontal plane ranges from 45 - 90°. Through this structural design, the mandibular advancement device 1 of the present utility model shows remarkable stability during the experiment, reducing the possibility of the device falling off. At the same time, this design improves the wearing comfort and effectiveness, and solves the main problems of the existing products.

[0086] The upper tray assembly 2 and / or the lower tray assembly 3 includes a channel post 5. As Figure 6 , Figure 7 shown, in the present utility model, the channel posts 5 located at the same position all belong to the same channel post 5. The channel posts 5 can be all arranged on the upper tray assembly 2, or all arranged on the lower tray assembly 3, or part on the upper tray assembly 2 and part on the lower tray assembly 3. When the upper tray assembly 2 and the lower tray assembly 3 are combined, the tray assemblies 2, 3 and the channel posts 5 together form an air flow channel 6. The height of the channel post 5 is between 0.5 - 25 mm, and the area of the air flow channel 6 is between 2 - 500 mm 2 . Therefore, when the user wears the mandibular advancement device 1, the device will not be completely closed, and the external air flow can enter the user's oral cavity from the air flow channel 6, without restricting the free flow of the air flow in the user's oral cavity. At the same time, it also meets the usage needs of users who are accustomed to breathing through their mouths during sleep, avoiding the risk of suffocation.

[0087] Furthermore, the number of the channel posts 5 is odd, to ensure that there is always a channel post 5 at the center of the mandibular advancement device 1 (i.e., the position of the user's front teeth). The channel posts 5 divide the air flow channel 6 on both sides. Therefore, the number of the air flow channels 6 is even and has a symmetrical structure. When the upper and lower teeth bite, since the front teeth are longer, they are usually the first parts to come into contact with each other, so they will bear more pressure. By arranging the channel post 5 at the center of the mandibular advancement device 1, it can bear greater pressure, which is more conducive to the stability of the mandibular advancement device 1. In addition, the symmetrical structure of the air flow channel 6 helps to stabilize the air flow passing through, further improving the safety and stability of the mandibular advancement device 1.

[0088] The adjustment part 4 is configured to connect the upper tray assembly 2 and the lower tray assembly 3 in a snap - fit form, and adjust the position of the lower tray assembly 3 relative to the upper tray assembly 2. Among them, as Figure 8 , Figure 9 shown, the snap - fit form is specifically that at least one protrusion 41 is provided on one side of the upper tray assembly 2 and / or the lower tray assembly 3, and the protrusion 41 is configured to squeeze - connect the upper bracket 21 and the lower bracket 31. The adjustment part 4 includes a protrusion 41 and a protrusion receiving part 42, and can adjust multiple gears.

[0089] Specifically, as Figure 10As shown, the shapes of the adjusting part 4, namely the protrusion 41 and the protrusion receiving part 42, are designed in an I shape, an F shape, an E shape or a symmetric E shape. The mandibular advancement device 1 usually requires relatively fine distance adjustment. Fine distance adjustment can effectively avoid the risk of over-adjustment, which may lead to too large an advancement distance, causing soreness and discomfort in the mandibular joint and the oral cavity, and even possibly causing problems such as mandibular joint disorders, oral ulcers, and other soft tissue contusions. Secondly, by gradually increasing the mandibular advancement distance through fine adjustment, users can adapt to the device more easily, and the wearing process is more comfortable, thereby improving compliance and willingness to wear. In addition, the gradual increase in the mandibular advancement distance through fine adjustment helps users better adapt to the treatment process and ultimately improves the treatment effect of the device. There are also other structures on the market that can be finely adjusted, but there are still many problems. For example, although bolt adjustment can be finely adjusted, due to the addition of extra small parts, the bolts are prone to loosening. Once they fall off, they may enter the esophagus or even the airway from the oral cavity, posing a great potential danger. In addition, if the bolts are made of flexible materials, it will be difficult to fix them and they are prone to loosening; if they are made of rigid materials, the exposed parts are easy to scratch the inside of the oral cavity. Similarly, there is another structure of an external connecting arm. If it is made of rigid materials, it is easy to scratch the inside of the oral cavity; if it is made of flexible materials, it is prone to loosening and difficult to fix. The gear structure is similar in appearance to the buckle structure, but its composition is different. Usually, it is necessary to push forcefully back and forth to adjust the advancement distance, and the gear structure usually needs to be made of relatively rigid materials to avoid loosening or wear. Commonly, polycarbonate (PC) materials are used. However, the mandibular advancement device 1 usually requires heating and shaping of the plasticizable parts, and bisphenol A is generated when the PC material is heated, which can cause harm to the human body. In addition, it is difficult to align the relatively thin gear edges left and right, which may lead to inconsistent advancement distances on the left and right, thus affecting the treatment effect. To solve these problems, the present utility model adopts a buckle structure with special designs such as I shape, F shape, E shape, and symmetric E shape. The special buckle design can not only ensure the wall thickness required in the production process but also ensure the structural stability. Whether it is an I shape, an F shape, an E shape or a symmetric E shape, they are all an integral structure, which is fixed by upper and lower buckling, and is easier to operate compared to the way of moving back and forth to adjust the distance of the gear structure. The buckle structure of the present utility model provides a more reliable and flexible solution, meets the fine requirements of the mandibular advancement device for distance adjustment, ensures the stability of the function of the mandibular advancement device 1, and at the same time facilitates the operation and adjustment of users.

[0090] The utility model adopts an integral buckle structure, enabling a multi-gear adjustment design on the same brackets 21 and 31. This design allows users to adjust the forward movement distance of the lower tray assembly 3 according to their personal circumstances to select the most effective and comfortable position, thereby improving the compliance of the mandibular advancement device 1. Compared with using multiple different combinations of upper and lower brackets, the utility model adopts a buckle structure with special designs such as I-shaped, F-shaped, E-shaped, and symmetric E-shaped. With only a pair of upper and lower brackets 21 and 31, a more precise and multi-gear forward movement distance adjustment can be achieved. This design not only eliminates the need for multiple brackets but also enables more gears of adjustment on the same brackets 21 and 31 while ensuring the fineness of the adjustment range. This innovation provides a more economical and simpler solution, greatly reducing costs and operational complexity.

[0091] The following describes several structures of the mandibular advancement device 1 with an adjustment part 4 of the utility model in combination with specific examples.

[0092] Embodiment 1

[0093] A mandibular advancement device 1 in this embodiment includes an upper tray assembly 2, a lower tray assembly 3, and an adjustment part 4. The upper tray assembly 2 and the lower tray assembly 3 are arched in shape to conform to the dental arch curve of the user. Among them, the upper tray assembly 2 includes an upper bracket 21 and an upper moldable part 22, and the lower tray assembly 3 includes a lower bracket 31 and a lower moldable part 32. The adjustment part 4 is configured to connect the upper tray assembly 2 and the lower tray assembly 3 in a buckle form and adjust the position of the lower tray assembly 3 relative to the upper tray assembly 2. Specifically, the buckle form is that at least one protrusion 41 is provided on one side of the upper tray assembly 2 and / or the lower tray assembly 3, and the protrusion 41 is configured to squeeze and connect the upper bracket 21 and the lower bracket 31. The adjustment part 4 includes a protrusion 41 and a protrusion receiving part 42. In this embodiment, the tray assemblies 2 and 3 include the upper tray assembly 2 and the lower tray assembly 3, the brackets 21 and 31 include the upper bracket 21 and the lower bracket 31, and the moldable parts 22 and 32 include the upper moldable part 22 and the lower moldable part 32.

[0094] As Figure 11 shown, the brackets 21 and 31 have an inner wall 211, 311 and an outer wall 212, 312. Among them, the protrusion 41 is provided on the surface of the outer wall 212 of the upper bracket 21, and the protrusion receiving part 42 is provided on the surface of the outer wall 312 of the lower bracket 31 and is opposite to the protrusion 41.

[0095] In this embodiment, the forward movement distance for each gear shift is set to 2 mm. Not only to achieve a more stable fixation effect, but also to ensure that the protrusion 41 and the protrusion receiving part 42 are easy to produce and not easily broken, the protrusion 41 is set to be symmetric E-shaped. As Figure 12As shown, the overall width of the protrusion 41 is 5 mm, the overall length is 5 mm, the length of the protruding side of each E is 1 mm, that is Figure 12 d1 in Figure 12 , the length of the groove side is 1 mm, that is Figure 12 d2 in Figure 12 . Each time one gear is shifted, the forward movement distance is 2 mm, that is d1 + d2. Similarly, the protrusion receiving portion 42 corresponds to the protrusion 41 and has a symmetric E-shaped groove. The length of the protruding side of each E is Figure 14 d3 in

[0096] and the length of the groove side is Figure 13 d4 in Figure 13 . The d1 of the protrusion 41 corresponds to the d3 of the protrusion receiving portion 42, and the d2 of the protrusion 41 corresponds to the d4 of the protrusion receiving portion 42. For better fixing and assembly, the ratio of d3 to d1 is 1 - 1.2, and the ratio of d4 to d2 is 1 - 1.2. In addition, after the protrusion 41 and the protrusion receiving portion 42 are connected, the overlapping height of the protrusion 41 and the protrusion receiving portion 42 is 0.5 - 20 mm, that is Figure 13 h2 in Figure 13 . If the overlapping part is too small, the protrusion 41 and the protrusion receiving portion 42 are likely to separate by themselves; if the overlapping part is too large, the protrusion 41 and the protrusion receiving portion 42 need to move up and down a relatively large distance to separate, which is not convenient for operation. Therefore, preferably, the overlapping height of the protrusion 41 and the protrusion receiving portion 42 is 3 mm. Figure 13

[0097] Embodiment 2

[0098] A mandibular advancement device 1 of this embodiment includes an upper tray assembly 2, a lower tray assembly 3, and an adjustment part 4. The upper tray assembly 2 and the lower tray assembly 3 are in an arched shape to conform to the dental arch curve of the user. Among them, the upper tray assembly 2 includes an upper bracket 21 and an upper moldable part 22, and the lower tray assembly 3 includes a lower bracket 31 and a lower moldable part 32. The adjustment part 4 is configured to connect the upper tray assembly 2 and the lower tray assembly 3 in a snap - fit form and adjust the position of the lower tray assembly 3 relative to the upper tray assembly 2. Among them, the snap - fit form is specifically that at least one protrusion 41 is provided on one side of the upper tray assembly 2 and / or the lower tray assembly 3, and the protrusion 41 is configured to squeeze - connect the upper bracket 21 and the lower bracket 31. The adjustment part 4 includes a protrusion 41 and a protrusion receiving part 42. In this embodiment, the tray assemblies 2 and 3 include the upper tray assembly 2 and the lower tray assembly 3, the brackets 21 and 31 include the upper bracket 21 and the lower bracket 31, and the moldable parts 22 and 32 include the upper moldable part 22 and the lower moldable part 32.

[0099] The difference between this embodiment and Embodiment 1 is that the protrusion 41 and the protrusion receiving part 42 of the adjustment part 4 are arranged in reverse. As Figure 15 shown, the brackets 21 and 31 have inner walls 211, 311 and outer walls 212, 312. Among them, the protrusion 41 is arranged on the outer wall 312 surface of the lower bracket 31, and the protrusion receiving part 42 is arranged on the outer wall 212 surface of the upper bracket 21 and is opposite to the protrusion 41.

[0100] In this embodiment, the advancement distance for each shift is set to 2 mm. Not only to achieve a more stable fixation effect, but also to ensure that the protrusion 41 and the protrusion receiving part 42 are easy to produce and not easy to break, the protrusion 41 is set in a symmetric E - shape. As Figure 16 shown, the overall width of the protrusion 41 is 5 mm, the overall length is 5 mm, the length of the protruding side of each E is 1 mm, that is Figure 16 d1 in Figure 16 , the length of the groove side is 1 mm, that is Figure 16 d2 in Figure 16 , each time one shift is moved, the advancement distance is 2 mm, that is d1 + d2. Similarly, the protrusion receiving part 42 corresponds to the protrusion 41 and has a symmetric E - shaped groove. The length of the protruding side of each E is Figure 16 d3 in Figure 16 , and the length of the groove side is Figure 16 d4 in Figure 16 . The d1 of the protrusion 41 corresponds to the d3 of the protrusion receiving part 42, the d2 of the protrusion 41 corresponds to the d4 of the protrusion receiving part 42, and for better fixation and assembly, the ratio of d3 to d1 is 1 - 1.2, and the ratio of d4 to d2 is 1 - 1.2. In addition, after the protrusion 41 and the protrusion receiving part 42 are connected, the overlapping height of the protrusion 41 and the protrusion receiving part 42 is 0.5 - 20 mm, that is Figure 18The h2 in [description]. If the overlapping part is too small, the protrusion 41 and the protrusion receiving part 42 are likely to separate on their own; if the overlapping part is too large, the protrusion 41 and the protrusion receiving part 42 need to move up and down a relatively large distance to separate, which is not convenient for operation. Therefore, preferably, the overlapping height of the protrusion 41 and the protrusion receiving part 42 is 3 mm.

[0101] In other embodiments, the protrusion 41 and the protrusion receiving part 42 are made of materials with a relatively thin wall thickness such as metal and can be firmly connected. The forward movement distance for each gear shift can be set to less than 2 mm, so as to achieve a smaller and more precise distance adjustment. For example, the protrusion 41 is set in an E shape, as Figure 17 shown. The length of the protruding edge of each E in the protrusion 41 is 0.5 mm, that is, Figure 17 d1 in [description], and the length of the groove edge is 0.5 mm, that is, Figure 17 d2 in [description]. Each time a gear is shifted, the forward movement distance is 1 mm, that is, d1 + d2. Similarly, the protrusion receiving part 42 corresponds to the protrusion 41 and has an E-shaped groove. The length of the protruding edge of each E is Figure 17 d3 in [description], and the length of the groove edge is Figure 17 d4 in [description].

[0102] In addition, the technical features in the above embodiments can be combined as needed to obtain the mandibular advancement device 1 including all or part of the above technical features.

[0103] The mandibular advancement device 1 with the adjustment part 4 implementing the present utility model has at least the following beneficial effects:

[0104] 1) The mandibular advancement device 1 usually requires relatively precise distance adjustment. Precise distance adjustment can effectively avoid the risk of over-adjustment, which may lead to excessive advancement distance, causing soreness and discomfort in the mandibular joint and the oral cavity, and even potentially triggering problems such as mandibular joint disorders, oral ulcers, and other soft tissue contusions. Secondly, by gradually increasing the mandibular advancement distance through precise adjustment, users can adapt to the device more easily, and the wearing process is more comfortable, thereby improving compliance and willingness to wear. In addition, the gradual increase in the mandibular advancement distance through precise adjustment helps users better adapt to the treatment process and ultimately improves the treatment effect of the device. There are also other structures on the market that can be precisely adjusted, but there are still many problems. For example, although bolt adjustment can be precisely adjusted, due to the addition of extra small components, the bolts are prone to loosening. Once they fall off, they may enter the esophagus or even the airway from the oral cavity, posing a relatively high potential danger. There is also another structure with an external connecting arm. If it is made of rigid material, it is easy to scratch the oral cavity edge; if it is made of flexible material, it is prone to loosening and difficult to fix. The gear structure is similar in appearance to the buckle structure, but its composition is different. Usually, it is necessary to push forcefully back and forth to adjust the advancement distance, and the gear structure needs to be made of relatively rigid material to avoid loosening or wear. Commonly, polycarbonate (PC) material is used. However, the mandibular advancement device usually requires heating and shaping the shapeable components, and PC material will produce bisphenol A when heated, thus causing harm to the human body. In addition, it is difficult to align the relatively thin gear edges left and right, which may lead to inconsistent advancement distances on the left and right, thereby affecting the treatment effect. To solve these problems, the present utility model adopts a buckle structure with special designs such as I-shaped, F-shaped, E-shaped, and symmetric E-shaped. The special buckle design can not only ensure the wall thickness required during the production process but also ensure the stability of the structure. Whether it is I-shaped, F-shaped, E-shaped, or symmetric E-shaped, they are all an integral structure and are fixed by upper and lower buckling, so they are easier to operate during the joining process. The buckle structure of the present utility model provides a more reliable and flexible solution, meeting the precise requirements of the mandibular advancement device 1 for distance adjustment, ensuring the stability of the function of the mandibular advancement device 1, and at the same time facilitating the operation and adjustment of users.

[0105] 2) The utility model adopts an integral buckle structure, enabling a multi-gear adjustment design on the same bracket. This design allows users to adjust the forward movement distance of the lower tray assembly 3 according to their personal circumstances to select the most effective and comfortable position, thereby improving the compliance of the mandibular advancement device 1. Compared with using multiple different combinations of upper and lower brackets, the utility model adopts a buckle structure with special designs such as I-shaped, F-shaped, E-shaped, and symmetric E-shaped. With only a pair of upper and lower brackets 21 and 31, it is possible to achieve a more precise and multi-gear adjustment of the forward movement distance. This design not only eliminates the need for multiple brackets but also enables a relatively large number of gears of adjustment on the same bracket while ensuring the fineness of the adjustment range. This innovation provides a more economical and simpler solution, greatly reducing costs and operational complexity.

[0106] 3) The mandibular advancement devices on the existing market still have the problem of being prone to falling off. Feedback from a large number of users shows that during sleep, the mandibular advancement devices often separate from the teeth, resulting in the device falling off. Through test analysis, it is found that this falling-off problem is mainly due to the need for the lower tray assembly to move forward relative to the upper tray assembly, and the user may move or unconsciously open and close the mouth during sleep, all of which may cause the mandibular advancement device to be prone to falling off. Therefore, to solve this problem, the upper and lower tray assemblies 2 and 3 need to have sufficient supporting force in the front and rear positions to ensure that the device can be firmly held in place during use. In addition, there are certain angular differences between each tooth, and they are not necessarily perpendicular to the horizontal plane. For example, the anterior teeth (central incisors and lateral incisors) usually have a certain inclination towards the lip relative to the horizontal vertical plane, and the inclination angle is about 10 - 25°; the inclination angle of the canine teeth (in the labial direction) is usually between 5 - 15°; the inclination angle of the molar teeth (in the labial direction) is usually between 0 - 5°. The anterior teeth and canine teeth have a relatively large angle relative to the horizontal vertical plane, while the molar teeth have a relatively small angle relative to the horizontal vertical plane, which results in different supporting forces required for different teeth during the occlusion process. The existing mandibular advancement devices usually set the inner and outer walls of the bracket perpendicular to the bottom wall, and this design cannot conform to the natural shape of the teeth, resulting in problems such as discomfort and easy falling off during wearing. Another common mandibular advancement device bracket is only composed of the bottom wall, without setting inner and outer walls in the front and rear positions, and this design does not have enough supporting force, making it easier for the teeth to slip out of the mandibular advancement device. After multiple tests on users with various tooth shapes, the present utility model provides an improved bracket design. The brackets 21 and 31 have an inner wall 211 and an outer wall 212 to provide sufficient supporting force. In addition, a certain angle is formed between the inner wall 211 and the bottom wall 212 of the brackets 21 and 31 to adapt to the natural angle of the anterior teeth inclined towards the lip, so as to better conform to the shape of the teeth. Through this structural design, the mandibular advancement device 1 of the present utility model shows remarkable stability during the experiment, reducing the possibility of the device falling off. At the same time, this design improves the wearing comfort and effectiveness, solving the main problems of the existing products.

[0107] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0108] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A mandibular advancement device with an adjustment part, characterized in that, Comprising: The shape of the upper tray assembly is arched to conform to the curve of the user's maxillary dentition. The shape of the lower tray assembly is arched to conform to the curve of the user's mandibular dentition. The upper tray assembly includes an upper bracket and an upper moldable component. The lower tray assembly includes a lower bracket and a lower moldable component. The upper tray assembly and / or the lower tray assembly is made of at least two different materials. An adjustment part configured to connect the upper tray assembly and the lower tray assembly in a snap-fit manner and adjust the position of the lower tray assembly relative to the upper tray assembly. Wherein, the snap-fit form is specifically that at least one protrusion is provided on one side of the upper tray assembly and / or the lower tray assembly, and the protrusion is configured to squeeze and connect the upper bracket and the lower bracket.

2. The mandibular advancement device according to claim 1, wherein The upper tray assembly is used to contact the user's maxillary dentition.

3. The mandibular advancement device according to claim 1, wherein, The lower tray assembly is used to contact the user's mandibular dentition.

4. The mandibular advancement device according to claim 1, characterized in that, The upper moldable component is configured to be softened after being heated so as to be adjusted and molded into a shape matching the user's maxillary dentition when the user bites.

5. The mandibular advancement device according to claim 1, characterized in that, The lower moldable component is configured to be softened after being heated so as to be adjusted and molded into a shape matching the user's mandibular dentition when the user bites.

6. A mandibular advancement device having an adjustment portion, characterized in that, Comprising: The upper tray assembly includes an upper bracket and an upper moldable component. The lower tray assembly includes a lower bracket and a lower moldable component. The upper tray assembly and / or the lower tray assembly is made of at least two different materials. An adjustment part configured to connect the upper tray assembly and the lower tray assembly in a snap-fit manner and adjust the position of the lower tray assembly relative to the upper tray assembly. Wherein, the snap-fit form is specifically that at least one protrusion is provided on one side of the upper tray assembly and / or the lower tray assembly, and the protrusion is configured to squeeze and connect the upper bracket and the lower bracket; Wherein, the upper bracket and the lower bracket have an inner wall and an outer wall, and the distance between the inner wall and the outer wall is at least partially 0.3 - 8 mm.

7. The mandibular advancement device according to claim 6, wherein, The protrusion is provided on the outer wall surface of the upper bracket, and the protrusion receiving part is provided on the outer wall surface of the lower bracket and is opposite to the protrusion.

8. The mandibular advancement device according to claim 6, wherein The protrusion is provided on the outer wall surface of the lower bracket, and the protrusion receiving part is provided on the outer wall surface of the upper bracket and is opposite to the protrusion.

9. The mandibular advancement device according to claim 6, wherein, The upper moldable component and the lower moldable component are at least partially made of a flexible thermoplastic material.

10. The mandibular advancement device according to claim 6, wherein, The upper bracket and the lower bracket are at least partially made of a relatively rigid material compared to the upper moldable component and the lower moldable component.

11. A mandibular advancement device with an adjustment part, characterized in that, Comprising: The upper tray assembly includes an upper bracket and an upper moldable component. The lower tray assembly includes a lower bracket and a lower moldable component. The upper tray assembly and / or the lower tray assembly is made of at least two different materials. An adjustment part configured to connect the upper tray assembly and the lower tray assembly in a snap-fit manner and adjust the position of the lower tray assembly relative to the upper tray assembly. Wherein, the upper bracket and the lower bracket have an inner wall, and the included angle formed by the inner wall and the horizontal plane ranges from 20 - 150°.

12. The mandibular advancement device according to claim 11, wherein The sum of the weights of the upper bracket and the lower bracket is between 3 - 50 g.

13. The mandibular advancement device according to claim 11, characterized in that, The overall weight range of the mandibular advancement device is between 8 - 80 g.

14. The mandibular advancement device according to claim 11, wherein, The snap structure of the adjustment part adopts an I shape, an F shape, an E shape or a symmetric E shape.

15. The mandibular advancement device according to claim 11, wherein The adjustment part can adjust multiple gears.

16. A mandibular advancement device with an adjustment portion, characterized in that, Comprising: The upper tray assembly includes an upper bracket and a plastically deformable upper part; The lower tray assembly includes a lower bracket and a plastically deformable lower part; The upper tray assembly and / or the lower tray assembly are made of at least two different materials; An adjustment part, configured to connect the upper tray assembly and the lower tray assembly in a snap form and adjust the position of the lower tray assembly relative to the upper tray assembly; Wherein, the upper bracket and the lower bracket have an inner wall, an outer wall and a bottom wall; The upper bracket and the lower bracket have one or more of the following characteristics: The vertical distance between the inner wall, the outer wall and the bottom wall is 0.5 - 20 mm; The perimeter range of the outer wall is 2 - 200 mm; The area range of the outer wall is 50 - 2000 square millimeters.

17. The mandibular advancement device according to claim 16, wherein The thickness of the bottom walls of the upper bracket and the lower bracket is both 0.5 - 20 mm.

18. The mandibular advancement device according to claim 16, wherein, The upper tray assembly and / or the lower tray assembly include channel columns. When the upper tray assembly and the lower tray assembly are combined, the gaps between the upper and lower tray assemblies and the channel columns together form an air flow channel.

19. The mandibular advancement device according to claim 18, wherein, The number of the channel columns is odd.

20. The mandibular advancement device according to claim 18, wherein The number of the air flow channels is even and has a symmetric structure.

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