Shell-shaped dental instrument set and dental correction system thereof

Abstract

The utility model discloses a shell-shaped dental instrument set which comprises a first shell-shaped dental instrument and a second shell-shaped dental instrument which are used for gradually moving the dentition of a patient from a first layout to a second layout, and the first shell-shaped dental instrument and the second shell-shaped dental instrument are respectively worn by the patient during a non-sleep period and a sleep period. The second shell-shaped dental instrument comprises connecting rods which are respectively arranged on two sides of the upper jaw shell-shaped dental appliance and the lower jaw shell-shaped dental appliance, so that the lower jaw of the patient is kept at a preset position, and the first shell-shaped dental instrument and the second shell-shaped dental instrument have the same geometrical shape; alternatively, the first and second shell-shaped dental instruments have different geometries, the first shell-shaped dental instrument having a geometry corresponding to a first designed amount of movement and the second shell-shaped dental instrument having a geometry corresponding to a second designed amount of movement, the utility model can solve the problem that the expression rate of a shell-shaped tooth appliance is insufficient in the process of combining snore stopping and invisible correction, and correspondingly, the utility model further discloses a dental correction system.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of dental orthodontics, and in particular to a shell-shaped dental instrument set and a dental correction system thereof. Background Art

[0002] On the one hand, with the development of the times, people have higher and higher requirements for the aesthetics, comfort, effectiveness, convenience, and oral hygiene of braces. Traditional fixed correction methods can no longer meet these orthodontic needs, and bracketless invisible correction technology has emerged. Bracketless invisible correction technology is that patients wear a series of transparent shell braces to move their teeth from the initial position to the target position.

[0003] On the other hand, snoring is a symptom of making noises during sleep. Mild snoring is usually not a big problem if it is within an acceptable range. However, if the snoring symptoms are severe, it will not only affect the sleep quality of yourself and those around you, but may also turn into "obstructive sleep apnea", which will endanger your health.

[0004] There are many reasons for snoring. The most common reason is that the muscles that originally fixed and stretched the throat relax during sleep, causing the muscles in the mouth to retreat, which in turn causes the airway to become narrow. The narrowing of the airway makes the wind speed of the inhaled air stronger, causing the relaxed soft palate, uvula, tongue and tonsils to vibrate, thus making a sound. Therefore, for snoring caused by this reason, if the patient's lower jaw can be pulled forward to the ideal position during sleep to stretch the airway, snoring can be prevented.

[0005] At present, in order to solve the problem of snoring, various orthodontic manufacturers have gradually tried to combine snoring prevention with invisible correction technology. For example, a connecting rod is used to fix the upper jaw front teeth part and the lower jaw back teeth part on both sides of the shell-shaped dental appliance. When the patient wears the shell-shaped dental appliance during sleep, the patient's lower jaw can be kept in a forward position through the connecting piece, thereby opening the airway to suppress snoring.

[0006] Firstly, in the above-mentioned technology of combining snoring prevention and invisible correction, the shell-shaped dental device with snoring prevention function often only has snoring prevention function and is only used for patients to wear when sleeping. The connecting parts are generally fixed on the shell-shaped dental device and cannot be removed, and cannot provide correction function for patients during non-sleeping periods. Therefore, if it is possible to provide patients with snoring prevention function while providing dental correction, it will provide patients with better performance; secondly, if it is considered to provide patients with snoring prevention function while providing correction function and connect the upper and lower shell-shaped orthodontic appliances of each shell-shaped dental device through a connecting rod, since in the existing dental correction scheme, generally one dental orthodontic appliance is used for each correction step, therefore, during the correction process, as the correction progresses, the problem of insufficient correction force will gradually appear. At the same time, the setting of the connecting rod on the shell-shaped dental appliance will make the correction force insufficient, resulting in more correction steps, which in turn leads to a prolonged correction cycle and unsatisfactory correction effect. Utility Model Content

[0007] The main purpose of the utility model is to provide a shell-shaped dental instrument set and a dental correction system thereof, aiming to solve the problem of insufficient expression rate of the shell-shaped dental correction device caused in the process of combining snoring control with invisible correction.

[0008] To achieve the above-mentioned purpose, an embodiment of the present application provides a shell-shaped dental appliance set, including a first shell-shaped dental appliance and a second shell-shaped dental appliance for gradually moving a patient's dentition from a first layout to a second layout, the first shell-shaped dental appliance and the second shell-shaped dental appliance both including a maxillary shell-shaped dental appliance and a corresponding mandibular shell-shaped dental appliance, the maxillary shell-shaped dental appliance including a plurality of cavities for accommodating maxillary teeth, the mandibular shell-shaped dental appliance including a plurality of cavities for accommodating mandibular teeth, the first shell-shaped dental appliance and the second shell-shaped dental appliance are respectively used for patients to wear during non-sleeping periods and during sleeping periods, the second shell-shaped dental appliance also includes connecting rods respectively arranged on both sides of the maxillary shell-shaped dental appliance and the mandibular shell-shaped dental appliance, one end of each connecting rod is connected to a part of the maxillary shell-shaped dental appliance on one side close to the front teeth, and the other end is connected to a part of the mandibular shell-shaped dental appliance on the same side close to the posterior teeth, so as to keep the patient's lower jaw in a predetermined position, thereby opening the patient's airway and suppressing the patient's snoring.

[0009] Wherein: the upper and lower shell-shaped dental appliances of the first shell-shaped dental instrument have the same geometric shape as the upper and lower shell-shaped dental appliances of the corresponding second shell-shaped dental instrument; or, the upper and lower shell-shaped dental appliances of the first shell-shaped dental instrument have different geometric shapes from the upper and lower shell-shaped dental appliances of the corresponding second shell-shaped dental instrument, the first shell-shaped dental instrument has a geometric shape corresponding to a first designed movement amount to produce a first tooth movement amount that causes tooth movement, and the second shell-shaped dental instrument has a geometric shape corresponding to a second designed movement amount to at least maintain the first tooth movement amount produced by the first shell-shaped dental instrument.

[0010] Optionally, the elasticity of the shell-shaped dental appliance of the second shell-shaped dental appliance is different from the elasticity of the shell-shaped dental appliance of the first shell-shaped dental appliance.

[0011] Optionally, the elasticity of the shell-shaped dental appliance of the second shell-shaped dental appliance is greater than the elasticity of the shell-shaped dental appliance of the first shell-shaped dental appliance.

[0012] Optionally, the elasticity of the shell-shaped dental appliance of the second shell-shaped dental instrument is greater than the elasticity of the shell-shaped dental appliance of the first shell-shaped dental instrument based on the difference in at least one of the shell thickness and the elastic modulus of the material of the shell-shaped dental appliance of the second shell-shaped dental instrument and the first shell-shaped dental instrument.

[0013] Optionally, the elasticity of the shell-shaped dental appliance of the second shell-shaped dental instrument is the same as the elasticity of the shell-shaped dental appliance of the first shell-shaped dental instrument.

[0014] Optionally, a first designed movement amount of the shell-shaped dental appliance of the first shell-shaped dental instrument is greater than a second designed movement amount of the shell-shaped dental appliance of the second shell-shaped dental instrument.

[0015] Optionally, the connecting rod is a rigid member, one end of which is provided with a first assembly portion, which is connected to a first joint portion arranged at a position of the maxillary shell-shaped appliance of the second shell-shaped dental instrument close to the front teeth, and the other end is provided with a second assembly portion, which is connected to a second joint portion arranged at a position of the mandibular shell-shaped appliance of the second shell-shaped dental instrument close to the posterior teeth, so as to connect the connecting rod to the corresponding positions of the upper and lower mandibular shell-shaped appliances of the second shell-shaped dental instrument to keep the patient's mandible in a predetermined position.

[0016] Optionally, each assembly portion is fixed to the corresponding first joining portion or the second joining portion by bonding or welding.

[0017] Optionally, each assembly portion is detachably connected to the corresponding first engaging portion or the second engaging portion.

[0018] Optionally, each assembly portion is threadedly connected to the corresponding first engaging portion or second engaging portion.

[0019] Optionally, each assembly part includes an insertion rod fixedly connected to the end of the connecting rod, a locking part is provided on the end of the insertion rod away from the connecting rod, and a socket corresponding to the insertion rod is provided on the corresponding first joint part or the second joint part. After the insertion rod is inserted into the corresponding socket, the locking part is used to limit the insertion rod to the socket.

[0020] Optionally, each assembly part includes a fixed end and a plug-in end, the fixed end is fixedly connected to the connecting rod, the plug-in end is located at the part of the assembly part away from the connecting rod, the plug-in end includes a guide part and a deformation part arranged adjacent to the guide part, the first joint part and / or the second joint part is provided with a guide channel and a deformation part accommodating cavity arranged adjacent to the guide channel, when it is necessary to assemble the connecting rod with the second shell-shaped dental instrument, the first assembly part and / or the second assembly part is inserted into the guide channel corresponding to the first joint part and / or the second joint part, the deformation part is compressed and deformed under the guidance of the guide channel and passes through the guide channel to enter the deformation part accommodating cavity to restore its original shape, and the guide part is confined in the guide channel; when it is necessary to disassemble the connecting rod and pull out the first assembly part and / or the second assembly part, the deformation part enters the guide channel under the guidance of the guide channel and is compressed and deformed, and after passing through the guide channel, it is separated from the corresponding first joint part and / or the second joint part to achieve disassembly.

[0021] Optionally, a first guide slope is formed at a portion of the deformation portion close to the guide portion to facilitate the deformation portion to detach from the deformation portion accommodating cavity including the first guide slope, and a second guide slope is formed away from the guide portion and adjacent to the first guide slope to facilitate the deformation portion to be inserted into the guide channel.

[0022] Optionally, one of the first assembly part and the second assembly part is a hook part formed by one end of the connecting rod, and the other assembly part is fixedly connected or detachably connected to the corresponding first coupling part or the second coupling part, and the hook part hooks the corresponding first coupling part or the second coupling part so that the connecting rod is connected to the upper and lower shell-shaped dental braces of the second shell-shaped dental instrument.

[0023] Optionally, the other assembly portion is movably connected to the corresponding first engaging portion or second engaging portion.

[0024] To achieve the above-mentioned purpose, the present application also provides a dental correction system, comprising N shell-shaped dental instrument sets for progressively moving the patient's dentition from a first dentition layout to a second dentition layout, wherein at least M of the N shell-shaped dental instrument sets are the above-mentioned shell-shaped dental instrument sets, wherein M≦N, M, N are positive integers.

[0025] Optionally, the positions of the first joint portion and the second joint portion for connecting the connecting rod in the second shell-shaped dental instrument of each shell-shaped dental instrument set of the M shell-shaped dental instrument sets change with the position of the jaw in which they are located, so that in each correction step, after the connecting rod is connected to the maxillary shell-shaped dental appliance and the mandibular shell-shaped dental appliance through the first joint portion and the second joint portion, the patient's lower jaw can be maintained in the predetermined position.

[0026] Compared with the prior art, the utility model discloses a shell-shaped dental instrument set and a dental correction system thereof. By designing two shell-shaped dental instruments in one shell-shaped dental correction device set and using one of the shell-shaped dental instruments to design a connecting rod for the purpose of stopping snoring, the patient can wear only the shell-shaped dental instrument with the connecting rod during sleeping hours, and only wear the shell-shaped dental instrument without the connecting rod during non-sleeping hours, thereby shortening the wearing time of each shell-shaped dental instrument, solving the problem of insufficient correction force caused by long-term wearing of shell-shaped dental instruments, and improving the expression rate of the movement amount of the correction design while achieving snoring control. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] One or more embodiments are exemplarily described by the pictures in the corresponding drawings, and these exemplary descriptions do not constitute limitations on the embodiments.

[0028] Figure 1 It is a structural schematic diagram of a shell-shaped dental instrument set of the present application;

[0029] Figure 2 are A-A' and BB' cross-sectional views of the shell-shaped dental instrument set in some embodiments of the present application;

[0030] Figure 3 A-A' and BB' cross-sectional views of shell-shaped dental instrument sets in other embodiments of the present application;

[0031] Figure 4 It is a schematic diagram of the assembly explosion of the connecting member and the second shell-shaped dental appliance in some embodiments of the present application;

[0032] Figure 5-Figure 8 This is a schematic diagram of a detachable connection between the second assembly portion and the second engagement portion in some embodiments of the present application;

[0033] Fig. 9Schematic diagram of detachable connection between the second assembly portion and the second joint portion in other embodiments of the present application

[0034] Fig.10 Schematic diagram of connection between a connecting member and a second shell-shaped dental appliance in some other embodiments of the present application;

[0035] Fig.11 It is a schematic diagram of the disassembly of the second assembly portion and the second engagement portion on the mandibular shell-shaped dental appliance of the second shell-shaped dental instrument in some embodiments of the present application;

[0036] Fig.12 It is a schematic diagram of the active connection between the traction portion of the second assembly portion and the second engagement portion in some embodiments of the present application;

[0037] Fig.13 Schematic diagram of active connection between the traction portion of the second assembly portion and the second engagement portion in other embodiments of the present application;

[0038] Fig.14 This is a schematic structural diagram of a dental correction system in some other embodiments of the present application. DETAILED DESCRIPTION

[0039] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0040] The "posterior tooth area" mentioned in each embodiment of the present invention is defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38, including premolars and molars, which are teeth 4-8 in the FDI marking method, and teeth 1-3 in the anterior tooth area in the FDI marking method. The teeth in the anterior tooth area include central incisors, lateral incisors and canines.

[0041] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0042] The inventor of the present application has found that in the current technology of combining anti-snoring with invisible orthodontics, the shell-shaped dental appliance with anti-snoring function often only has the anti-snoring function and is only used for patients to wear when sleeping. The connecting parts are generally fixed on the shell-shaped dental appliance and cannot be removed, and it is impossible to provide the patient with the correction function during the non-sleeping period. Therefore, if the patient can be provided with the anti-snoring function while providing dental correction, better performance will be provided to the patient; secondly, if the upper and lower shell-shaped orthodontic appliances of each shell-shaped dental appliance are connected by a connecting rod while providing the correction function and providing the patient with the anti-snoring function, since in the existing dental correction schemes, generally one dental appliance is used for each correction step, therefore, during the correction process, as the correction progresses, the problem of insufficient correction force will gradually appear. At the same time, the setting of the connecting rod on the shell-shaped dental appliance will make the correction force insufficient, resulting in more correction steps, which in turn leads to a prolonged correction cycle and unsatisfactory correction effect.

[0043] Based on this, the utility model proposes a shell-shaped dental instrument set, including a first shell-shaped dental instrument and a second shell-shaped dental instrument for gradually moving a patient's dentition from a first layout to a second layout, the first shell-shaped dental instrument and the second shell-shaped dental instrument both including a maxillary shell-shaped dental appliance and a corresponding mandibular shell-shaped dental appliance, the maxillary shell-shaped dental appliance including a plurality of cavities for accommodating maxillary teeth, the mandibular shell-shaped dental appliance including a plurality of cavities for accommodating mandibular teeth, the first shell-shaped dental instrument and the second shell-shaped dental instrument are respectively used for patients to wear during non-sleeping periods and during sleeping periods, the second shell-shaped dental instrument also includes connecting rods respectively arranged on both sides of the maxillary shell-shaped dental appliance and the mandibular shell-shaped dental appliance, one end of each connecting rod is connected to a part of one side of the maxillary shell-shaped dental appliance close to the front teeth, and the other end is connected to the mandibular shell-shaped dental appliance. The part of the upper and lower jaws of the first shell-shaped dental appliance is close to the posterior teeth on the same side of the device to keep the patient's lower jaw in a predetermined position, thereby propping up the patient's airway and suppressing the patient's snoring. In some embodiments, the upper and lower jaw shell-shaped dental appliances of the first shell-shaped dental appliance and the upper and lower jaw shell-shaped dental appliances of the corresponding second shell-shaped dental appliance have the same geometric shape. The utility model designs two shell-shaped dental appliances with exactly the same geometric shapes in a shell-shaped dental appliance set, and uses one of the shell-shaped dental appliances to design a connecting rod for the purpose of stopping snoring. The patient can only wear the shell-shaped dental appliance with the connecting rod during sleeping hours, and only wear the shell-shaped dental appliance without the connecting rod during non-sleeping hours, thereby shortening the wearing time of each shell-shaped dental appliance, solving the problem of insufficient correction force caused by long-term wearing of shell-shaped dental appliances, and improving the expression rate of the correction design movement while achieving snoring.

[0044] In some embodiments, the geometric shapes of the upper and lower shell-shaped dental appliances of the first shell-shaped dental instrument and the corresponding upper and lower shell-shaped dental appliances of the second shell-shaped dental instrument may also be different, wherein the first shell-shaped dental instrument has a geometric shape corresponding to a first designed movement amount to produce a first tooth movement amount that causes tooth movement, and the second shell-shaped dental instrument has a geometric shape corresponding to a second designed movement amount to at least maintain the first tooth movement amount produced by the first shell-shaped dental instrument. The present application designs two shell-shaped dental instruments in a shell-shaped dental appliance set, which are respectively used to produce a larger first tooth movement amount and to maintain the first tooth movement amount, and a connecting rod is connected between the upper and lower shell-shaped dental appliances of the shell-shaped dental instrument that produces and maintains the first tooth movement amount to maintain the patient's lower jaw in a predetermined position, so as to open the patient's airway and suppress the patient's snoring. This not only ensures that the shell-shaped dental instrument of the present application can improve the expression rate with a larger designed movement amount in a treatment section of a treatment cycle, but also achieves the purpose of suppressing the patient's snoring.

[0045] The implementation details of the dental correction system described in this application will be specifically described below in conjunction with specific embodiments. The following content is only the implementation details provided for ease of understanding and is not necessary for implementing this solution.

[0046] Combination Figure 1As shown, the shell-shaped dental instrument set of the present application includes a first shell-shaped dental instrument 101 and a second shell-shaped dental instrument 102, wherein the first shell-shaped dental instrument 101 and the second shell-shaped dental instrument 102 both include an upper shell-shaped dental appliance (101a, 102a) and a corresponding lower shell-shaped dental appliance (101b, 102b), wherein the upper shell-shaped dental appliance (101a, 102a) includes a plurality of cavities for accommodating upper teeth, and the lower shell-shaped dental appliance (101b, 102b) includes a plurality of cavities for accommodating upper teeth, and the lower shell-shaped dental appliance (101b, 102b) includes a plurality of cavities for accommodating upper teeth, and the upper shell-shaped dental appliance (101a, 102a) includes a plurality of cavities for accommodating upper teeth, and the lower shell-shaped dental appliance (101b, 102b) includes a plurality of cavities for accommodating upper teeth, and the upper shell-shaped dental appliance (101a, 102a) includes a plurality of cavities for accommodating upper teeth, and the upper shell-shaped dental appliance (101b, 102b ... 01b, 102b) comprises a plurality of cavities for accommodating mandibular teeth, the maxillary shell-shaped dental appliance 101a of the first shell-shaped dental appliance 101 and the maxillary shell-shaped dental appliance 102a of the second shell-shaped dental appliance 102 have the same geometric shape, which is the same as the target layout (i.e., the second layout) of the patient's dentition in the current correction step, and the first shell-shaped dental appliance 101 and the second shell-shaped dental appliance 102 are worn at different treatment periods of a unit treatment cycle of the same correction step, and by being connected with the current The deformation of the cavity having the same second layout of the patient's dentition in the previous correction step realizes the movement of the teeth, so as to achieve the purpose of moving the patient's dentition from the first layout to the second layout. The first layout refers to the dentition layout of the patient before the correction in the current correction step. The unit treatment cycle can be one day, and different treatment periods can include sleeping periods and non-sleeping periods. For example, the first shell-shaped dental appliance 101 can be worn during the non-sleeping period of the day, and the second shell-shaped dental appliance 102 can be worn during the sleeping period of the day. The second shell-shaped dental appliance 102 also includes connecting rods 103 respectively arranged on both sides of its maxillary shell-shaped dental appliance 102a and mandibular shell-shaped dental appliance 102b, one end of each connecting rod 103 is connected to the part of the maxillary shell-shaped dental appliance 102a on one side close to the front teeth, and the other end is connected to the part of the mandibular shell-shaped dental appliance 102b on the same side close to the posterior teeth, so as to keep the patient's lower jaw in a predetermined position, thereby opening the patient's airway and suppressing the patient's snoring.

[0047] In this embodiment, the first shell-shaped dental appliance 101 and the second shell-shaped dental appliance 102 are prepared using a physical tooth model corresponding to the same correction step, and the physical tooth model represents the second layout of the current correction step of the patient's dentition. That is to say, in the prior art, a physical tooth model is often only used to generate one dental appliance, while in this embodiment, two dental appliances are generated based on the physical tooth model.

[0048] Although the shell-shaped dental appliances (101a and 101b) of the first shell-shaped dental appliance 101 and the shell-shaped dental appliances (102a and 102b) of the second shell-shaped dental appliance 102 have the same geometric shape, the correction force of the invisible correction technology is not only related to the geometric shape of the inner cavity of the appliance, but also to other factors, one of which is the overall elasticity of the shell-shaped dental appliance. Considering that the elasticity of the shell-shaped dental appliance is constantly changed in a unit treatment cycle (for example, one day), the patient's dentition cannot adapt, thereby causing discomfort to the patient, therefore, in some embodiments, the elasticity of the shell-shaped dental appliances (101a and 101b) of the first shell-shaped dental appliance 101 and the shell-shaped dental appliances (102a and 102b) of the second shell-shaped dental appliance 102 is preferably the same. Specifically, based on the physical tooth model, the first shell-shaped dental appliance can be manufactured using a first polymer film, and then, based on the same physical tooth model, the second shell-shaped dental appliance can be manufactured using a second polymer film. The second polymer membrane is a membrane made of the same material as the first polymer membrane, and the thickness of the membrane is also the same, such as Figure 2 As shown, of course, even if the membranes are made of the same material and have the same thickness, the two shell-shaped dental instruments obtained actually have errors due to errors in the manufacturing process. The errors caused by this manufacturing process are not considered in this embodiment.

[0049] Of course, based on different correction requirements, the elasticity of the shell-shaped dental appliance (101a and 101b) of the first shell-shaped dental device 101 and the shell-shaped dental appliance (102a and 102b) of the second shell-shaped dental device 102 may also be different. Generally speaking, during the correction process, the greater the overall elasticity of the shell-shaped dental appliance, the smaller the correction force, which can improve the overall comfort, but the correction process is relatively slow. The greater the overall elasticity of the shell-shaped dental appliance, the greater the correction force, the faster the correction speed, but it also brings about increased discomfort. Considering that the second shell-shaped dental appliance connected with a connecting rod for stopping snoring is worn during sleep, since wearing the connecting rod may cause discomfort to the patient, if a stronger correction force is added at this time, the patient's discomfort may be increased, thereby affecting the patient's sleep. Therefore, in other embodiments, the elasticity of the shell-shaped dental appliance (102a, 102b) of the second shell-shaped dental appliance 102 is greater than the elasticity of the shell-shaped dental appliance (101a) of the first shell-shaped dental appliance 101. Specifically, based on the physical tooth model, the first shell-shaped dental appliance can be manufactured using a first polymer film, and then, based on the same physical tooth model, the second shell-shaped dental appliance can be manufactured using a second polymer film. The second polymer film is a different type of film from the first polymer film. The elasticity of the film is closely related to the material or thickness of the film. Therefore, in some preferred embodiments, in order to make the shell-shaped dental appliance (102a, 102b) of the second shell-shaped dental appliance stronger than the shell-shaped dental appliance (101a) of the first shell-shaped dental appliance 01a, 101b) has greater elasticity, the material of the second polymer film used to prepare the second shell-shaped dental appliance has a greater elastic modulus than the material of the first polymer film used to prepare the first shell-shaped dental appliance, the polymer material of the first polymer film used to prepare the first shell-shaped dental appliance and the second polymer film used to prepare the second shell-shaped dental appliance can be one or a combination of materials such as PETG (polyester), PC (polycarbonate), TPU (polyurethane), etc., or can be one or more of amorphous thermoplastic polymers, semi-crystalline thermoplastic polymers and transparent thermoplastic polymers. The above-mentioned thermoplastic polymers are selected from polycarbonate, thermoplastic polyurethane, acrylic acid, polysulfone, polypropylene, polypropylene / ethylene copolymer, cycloolefin polymer / copolymer, poly-4-methyl-1-pentene or polyester / polycarbonate copolymer, styrene-based polymer materials, polyamide, polymethylpentene, polyetheretherketone and their combinations, as long as the elastic modulus of the polymer material of the second polymer film is greater than the elastic modulus of the polymer material of the first polymer film.

[0050] For the same material, the thickness affects the correction force. In other embodiments, in order to make the shell-shaped dental appliance (102a, 102b) of the second shell-shaped dental instrument have greater elasticity than the shell-shaped dental appliance (101a, 101b) of the first shell-shaped dental instrument, the shell-shaped dental appliance (102a, 102b) of the second shell-shaped dental instrument and the shell-shaped dental appliance (101a, 101b) of the first shell-shaped dental instrument can also be made of a membrane of the same material but the membrane has different thicknesses. Since when the materials are the same, the thicker the shell-shaped dental appliance, the greater the correction force. Therefore, the membrane used to prepare the shell-shaped dental appliance (102a, 102b) of the second shell-shaped dental instrument should have a smaller thickness than the membrane used to prepare the shell-shaped dental appliance (101a, 101b) of the first shell-shaped dental instrument, such as Figure 3 As shown, for example, the membrane thickness of the shell-shaped dental appliance (101a, 101b) used to prepare the first shell-shaped dental instrument is 0.6mm-2mm, and the membrane thickness of the shell-shaped dental appliance (102a, 102b) used to prepare the second shell-shaped dental instrument is 0.1mm-1.5mm. Therefore, in this embodiment, the membrane thickness of the shell-shaped dental appliance (102a, 102b) used to prepare the second shell-shaped dental instrument is designed to be smaller than the membrane thickness of the shell-shaped dental appliance (101a, 101b) used to prepare the first shell-shaped dental instrument, so that the second shell-shaped dental appliance generates a smaller correction force when worn, thereby improving the patient's comfort, facilitating the patient's wearing during sleep, and facilitating the patient's sleep.

[0051] In some embodiments, the geometric shapes of the upper and lower shell-shaped dental appliances (101a, 101b) of the first shell-shaped dental device 101 and the corresponding upper and lower shell-shaped dental appliances (102a, 102b) of the second shell-shaped dental device 102 may also be different, and the specific geometric shapes of the two can be designed separately according to the functions they need to achieve, wherein the function positioning of the upper and lower shell-shaped dental appliances (101a, 101b) of the first shell-shaped dental device 101 is mainly a correction function, which needs to cause a large tooth movement and generate a first tooth movement amount of tooth movement; the function positioning of the shell-shaped dental appliances (102a, 102b) of the second shell-shaped dental device is to stop snoring and generate a correction force in the opposite direction of tooth rebound, at least maintain the first tooth movement amount generated by the first shell-shaped dental device 101 on the teeth, so that the teeth do not move to their pre-correction positions and rebound.

[0052] Therefore, in order to realize the respective functions of the first shell-shaped dental appliance and the second shell-shaped dental appliance, in some embodiments, the shell-shaped dental appliance (101a, 101b) of the first shell-shaped dental appliance 101 has a geometric shape corresponding to a first design movement amount, the shell-shaped dental appliance (102a, 102b) of the second shell-shaped dental appliance 102 has a geometric shape corresponding to a second design movement amount, and the first design movement amount is greater than the second design movement amount of the shell-shaped dental appliance (102a, 102b) of the second shell-shaped dental appliance 102, that is, the upper and lower shell-shaped dental appliances (102a, 102b) of the first shell-shaped dental appliance 101 and the corresponding second shell-shaped dental appliance 102 The geometric shapes of the upper and lower shell-shaped dental appliances (102a, 102b) are different. The geometric shape corresponding to the first designed movement amount is used to generate the first tooth movement amount that causes tooth movement, and the geometric shape corresponding to the second designed movement amount is used to at least maintain the first tooth movement amount generated by the first shell-shaped dental device 101. For example, in the case of detorsion of the patient's mandibular canines, the first shell-shaped dental device 101 is worn during the day, and the first designed movement amount of the upper and lower shell-shaped dental appliances of the first shell-shaped dental device 101 is 2.5° or 3°, and the second shell-shaped dental device 102 with an anti-snoring function is worn at night, and the designed movement amount of the upper and lower shell-shaped dental appliances of the second shell-shaped dental device 102 is 2°. In this embodiment, the shell-shaped dental appliance of the first shell-shaped dental instrument is designed to cause a first tooth movement amount of tooth movement, and the shell-shaped dental appliance of the second shell-shaped dental instrument is designed to at least maintain the first tooth movement amount so that the position of the tooth does not rebound. When the first shell-shaped dental instrument is worn on the patient's teeth during a non-sleeping period, the shell-shaped dental appliance of the first shell-shaped dental instrument 101 applies a larger correction force and torque to the patient's teeth, causing a larger rate of tooth movement, thereby causing a larger amount of tooth movement, thereby improving the expression rate; when the second shell-shaped dental instrument 102 is worn on the patient's teeth during a sleeping period, The shell-shaped dental appliance of the second shell-shaped dental device 102 applies less correction force and torque to the patient's teeth, which improves the patient's comfort and facilitates the patient's sleep. At this time, the rate of tooth movement is small, which can be used to counteract the force of tooth rebound and play a role in maintaining the position of the teeth. When designing the second design movement amount of the second shell-shaped dental device 102, it is necessary to at least maintain the first tooth movement amount caused by the first shell-shaped dental device 101 for tooth correction when it is worn on the patient's dentition, so as to avoid the rebound phenomenon during the tooth correction process, that is, the second shell-shaped dental device 102 has at least the function of maintaining the first tooth movement amount.

[0053] In this embodiment, the first design movement amount and the second design movement amount should be within the threshold range of the design movement amount of the corresponding tooth in the current correction step. For the threshold range of the design movement amount of each tooth in the correction step, for example, for translation cases, the general single-step design movement amount is 0.25-0.33 mm, for torsion cases, the angle single-step design movement amount is 1-3 degrees, and the further torsion angle single-step design movement amount is 1.5-2.5 degrees. As long as the first design movement amount and the second design movement amount are within the above threshold range, and the first design movement amount of the shell-shaped dental appliance (101a, 101b) of the first shell-shaped dental appliance is greater than the second design movement amount of the shell-shaped dental appliance (102a, 102b) of the second shell-shaped dental appliance 102, it is sufficient. The present application makes specific restrictions on the design movement amount because in the design of the braces, the design movement amount of the dental appliance must comply with the biomechanical laws of tooth movement. If the design movement amount is too small, the correction force or torque applied to the teeth by the dental appliance will be insufficient, making it difficult to cause tooth movement; if the design movement amount is too large, it may cause periodontal tissue lesions, or the patient may not be able to wear the braces designed according to the design movement amount.

[0054] In some embodiments, for the second shell-shaped dental appliance 102 worn on the patient's dentition during sleep, the connecting rod 103 connected between the part of the maxillary shell-shaped dental appliance close to the front teeth and the part of the mandibular shell-shaped dental appliance close to the back teeth is a rigid member, one end of which is provided with a first assembly portion 1031 for connecting with a first joint portion 102a-1 set at a position close to the front teeth of the maxillary shell-shaped dental appliance 102a of the second shell-shaped dental appliance 102, and the other end is provided with a second assembly portion 1032 for connecting with a second joint portion 102a-2 set at a position close to the back teeth of the mandibular shell-shaped dental appliance 102, such as Figure 4 As shown, the connecting rod 103 is connected to the corresponding positions of the upper and lower shell-shaped appliances of the second shell-shaped dental instrument 102 to keep the patient's mandible in a predetermined position. In some embodiments, the first assembly part 1031, the second assembly part 1032 and the connecting rod 103 can be an integral structure, or the first assembly part 1031 and the second assembly part 1032 can be fixed to the two ends of the connecting rod 103 by bonding or welding, or the first assembly part 1031 and the second assembly part 1032 can also be connected to the connecting rod 103 in a detachable manner, and the present application is not limited thereto.

[0055] In the present application, the first joint portion 102a-1 is arranged at the portion of the maxillary shell-shaped dental appliance 102a close to the front teeth, and the second joint portion 102a-2 is arranged at the portion of the mandibular shell-shaped dental appliance 102b close to the posterior teeth, wherein the portion close to the front teeth can refer to the teeth in the posterior teeth area close to the front teeth, or can refer to the teeth in the anterior teeth area, and the portion close to the posterior teeth can refer to the teeth in the posterior teeth area, or can refer to the teeth in the anterior teeth area close to the posterior teeth. The setting positions of the first joint portion 102a-1 and the second joint portion 102a-2 can be set as long as the patient's lower jaw can be maintained in the preset position to open the patient's airway and suppress the patient's snoring.

[0056] In some embodiments, the second assembly portion 1032 located on the connecting rod 103 can be fixed to the surface of the second joint portion 102a-2 by bonding or welding. This method has a simple structure. The connecting rod 103 does not need to be disassembled after being assembled on the upper and lower shell-shaped dental appliances of the second shell-shaped dental instrument. The patient can directly wear the second shell-shaped dental instrument with the connecting rod at night to keep his lower jaw in a predetermined position, open the airway, and suppress the patient's snoring. However, the disadvantage of this method is that since the connecting rod 103 is fixed to the upper and lower shell-shaped dental appliances of the second shell-shaped dental instrument, in the process of forming a series of shell-shaped dental instrument sets corresponding to multiple correction steps, the corresponding connecting rod must be bonded or welded to the second shell-shaped dental instrument of each shell-shaped dental instrument set. In fact, the shape and structure of the connecting rods in most correction steps are the same and can be reused, which results in a waste of connecting rods.

[0057] Therefore, in order to make the connecting rod 103 reusable, in other embodiments, the second assembly portion 1032 located on the connecting rod 103 is detachably connected to the corresponding second coupling portion 102a-2. Through the detachable connection, the second shell-shaped dental instruments of different correction steps can share the connecting rod. That is to say, the entire correction process can only use two connecting rods, and the two connecting rods are respectively used to connect the two sides of the upper and lower shell-shaped dental appliances of the second shell-shaped dental instruments in each correction step. The two connecting rods are used in each correction step to keep the patient's mandible in a predetermined position to achieve the purpose of stopping snoring. In this embodiment, there is no need to equip each second shell-shaped dental instrument with a connecting rod, which reduces the number of connecting rods used and reduces costs.

[0058] The following describes the detachable connection method of the present application: In the present application, since the morphological structures of the first joining portion 102a-1 and the second joining portion 102a-2 can be the same, only the structural description of the second joining portion 102a-2 located on the mandibular shell-shaped dental appliance can be taken as an example, and the structure of the first joining portion is the same. In some embodiments, the second joint portion 102a-2 can be a mounting platform that is integrally formed with the mandibular shell-shaped dental appliance 102-b, away from the buccal surface of the mandibular shell-shaped dental appliance 102-b and protrudes from the buccal surface of the mandibular shell-shaped dental appliance 102-b, and a fixing hole for connecting and fixing with the second joint portion 102a-2 is formed on the mounting platform, and the mounting platform forms a second cavity, wherein the fixing hole can be in the form of a groove, but since the thickness of the diaphragm of the shell-shaped dental appliance is generally limited, the fixing hole in the form of a groove may make the connection strength between the fixing hole and the second assembly portion limited, therefore, the fixing hole can also be selected as a through hole structure, of course, in other embodiments, the second joint portion 102a-2 can also be prepared separately, and then fixed to the corresponding position of the buccal surface of the mandibular shell-shaped dental appliance 102-b by bonding or welding. The following takes the integrally formed second joint portion 102a-2 as an example to illustrate its connection with the second assembly portion 1032 of the connecting rod 103:

[0059] In some embodiments, the detachable connection between the second assembly portion 1032 and the second coupling portion 102a-2 can be a threaded connection. For example, the free end of the second assembly portion 1032 is provided with an external thread, and the second coupling portion 102a-2 of the mandibular shell-shaped dental appliance of each corresponding second shell-shaped dental instrument is provided with a corresponding fixing hole with an internal thread. During the sleep period, the free end of the second assembly portion 1032 is screwed into the fixing hole in a first direction to match the fixing hole on the second coupling portion 102a-2 for installation; when the shell-shaped dental appliance of the current correction stage is worn, the free end of the second assembly portion 1032 is screwed out of the fixing hole in a direction opposite to the first direction, thereby removing the connecting rod 103 from the upper and lower shell-shaped dental appliances for use in the next correction stage, wherein the first direction is clockwise.

[0060] In other embodiments, the detachable connection between the second assembly portion 1032 and the second joint portion 102a-2 may also be a pluggable connection. Specifically, the second assembly portion 1032 includes a fixed end and a pluggable end, the fixed end is fixedly connected to the connecting rod 103, and the pluggable end is located at a portion of the second assembly portion 1032 away from the connecting rod 103, such as Figure 5 As shown, the plug-in end includes a deformation portion 1032a and a guide portion 1032b disposed adjacent to the deformation portion 1032a. Correspondingly, a concave hollow structure 102a-20 is disposed on the second joint portion 102a-2. Figure 6-Figure 8 It is a schematic cross-sectional diagram of the plug-in end and the hollow structure in the buccolingual direction in this embodiment. Considering the limited thickness of the diaphragm, the second joint portion 102a-2 in this embodiment is a mounting platform for the mandibular shell-shaped dental appliance 102-b bonded or welded to the second shell-shaped dental instrument 102. The hollow structure 102a-20 on the mounting platform includes a guide channel 102a-21 and a deformation portion accommodating cavity 102a-22 adjacent to the guide channel 102a-21. When the connecting rod 103 needs to be installed on the mandibular and maxillary shell-shaped dental appliances of the second shell-shaped dental instrument, the deformation portion 1032a is elastically compressed when passing through the guide channel 102a-21, so that the deformation portion 1032a can pass through the guide channel 102a-21 and enter the deformation portion. The deformation part 1032a enters the deformation part accommodating cavity 102a-22, and then returns to the shape before being elastically compressed, and is clamped on the side where the guide channel 102a-21 is connected to the deformation part accommodating cavity 102a-22, and the deformation part 1032a is accommodated in the deformation part accommodating cavity 102a-22; when the connecting rod 103 needs to be disassembled, it is only necessary to pull the connecting rod along the pulling-out direction, and the deformation part 1032a is compressed and elastically deformed under the guidance of the guide channel 102a-21, and then passes through the guide channel 102a-21 in the reverse direction and disengages from the corresponding hollow structure of the second joint part 102a-2. The entire installation and disassembly process is simple and quick to operate, and is convenient for patients to operate.

[0061] In some preferred embodiments, in order to further facilitate the insertion and removal of the second assembly portion 1032, the deformation portion 1032a includes a first guide portion 1032a-1, a second guide portion 1032a-2 and a relief space 1032a-3, wherein the first guide portion 1032a-1 is arranged adjacent to the free end of the deformation portion 1032a to form a second guide slope that facilitates the insertion of the deformation portion 1032a into the guide channel, and the second guide portion 1032a-2 is arranged at the free end of the deformation portion 1032a. A first guide slope is formed between the first guide portion 1032a-1 and the guide portion 1032b, which facilitates the deformation portion 1032a to detach from the deformation portion accommodating cavity 102a-22; the release space 1032a-3 penetrates the deformation portion 1032a along the plugging and unplugging direction, and the end adjacent to the free end of the deformation portion 1032a is open, so as to provide a release space for the deformation portion 1032a to be compressed and elastically deformed when being inserted into or pulled out of the guide channel 102a-21. And the axial depth H of the relief space 1032a-3 is greater than or equal to the axial length L3 of the deformation part 1032a. Such structural design helps the relief space 1032a-3 to better meet the relief space required for the elastic deformation of the deformation part 1032a when inserted into or pulled out of the guide channel 102a-21, so as to ensure that the deformation part 1032a can be inserted into or pulled out of the guide channel 102a-21.

[0062] In other embodiments, Fig. 9 As shown, the second assembly portion 1032 includes an insertion rod fixedly connected to the end of the connecting rod 103, and a locking portion (not shown) is provided on the end of the insertion rod away from the connecting rod 103. A corresponding socket is provided on the second joint portion 102a-2, and the socket is a through-hole structure. After the insertion rod of the second assembly portion 1032 is inserted into the socket, at least the locking portion is exposed in the second cavity 1014 formed by the second joint portion 102a-2. When it is necessary to connect the connecting rod 103 with the upper and lower shell-shaped dental appliances of the second shell-shaped dental device 102, the assembly portion on the connecting rod is inserted into the socket on the corresponding joint portion. The locking portion is exposed to the second cavity formed by the corresponding engaging portion, and the locking portion can be used to limit the insertion rod in the insertion hole. For example, the locking portion can be a limiting hole formed on the insertion rod, and a limiting rod 1015 is inserted into the limiting hole so that the limiting rod interferes with the edge of the insertion hole of the second engaging portion to prevent it from falling off; when disassembly is required, the limiting rod only needs to be gently pulled out of the limiting hole, and the insertion rod of the second assembly portion can be pulled out of the insertion hole of the second engaging portion. The structure is simple and the operation is convenient. In a specific example, the limiting rod and the limiting hole can be connected by a thread or an interference fit.

[0063] In some embodiments, one of the first assembly part and the second assembly part can be connected to the corresponding joint part by hooking. In this case, one of the first assembly part and the second assembly part can be a hook formed by a corresponding end of the connecting rod 103, and the corresponding joint part forms a structure that can be hooked by the hook on the same side. The other of the first assembly part and the second assembly part can be connected to the corresponding first joint part or the second joint part by bonding, welding, threaded connection, pin connection, pluggable connection, etc. Fig.10 Taking the first assembly portion 1031 formed in a hook shape at the end of the connecting rod 103 as an example, the corresponding first engaging portion 102a-1 located at the portion of the maxillary shell-shaped dental appliance close to the front teeth has a shape and size that is convenient for the hook to hook. For example, the first engaging portion 102a-1 can be a traction buckle arranged on the buccal surface of the portion of the maxillary shell-shaped dental appliance close to the front teeth, and the second assembly portion of the connecting rod 103 can be connected by one of bonding, welding, threaded connection, pin connection, and pluggable connection. When the patient needs to wear the second shell-shaped dental device 102 during sleep, if the second assembly portion of the connecting rod has been fixed to the second joint portion of the mandibular shell-shaped dental appliance close to the posterior teeth, then the connecting rod is pulled to a preset position, and the first assembly portion in the shape of a hook is hooked on the first joint portion of the maxillary shell-shaped dental appliance close to the front teeth; if the second assembly portion of the connecting rod has not been assembled, the second assembly portion is fixed to the second joint portion of the mandibular shell-shaped dental appliance close to the posterior teeth through a detachable connection, and then the connecting rod is pulled to a preset position, and the first assembly portion in the shape of a hook is hooked on the first joint portion of the maxillary shell-shaped dental appliance close to the front teeth, so that the patient's lower jaw is kept in the preset position, thereby opening the patient's airway and preventing the lower jaw from retracting, thereby achieving the purpose of suppressing the patient's snoring.

[0064] In other embodiments, in order to make it more convenient for the patient to hook the first assembly portion of the hook with the first engaging portion, the second assembly portion 1032 and the second engaging portion 102a-2 are movably connected, so that the connecting rod 103 can rotate around the normal axis of the buccal side where the second engaging portion 102a-2 is located. When the connecting rod 103 needs to be worn during sleep, the second assembly portion of the connecting rod 103 can be movably connected to the second engaging portion 102a-2 first, and then the connecting rod 103 can be pulled so that its first assembly portion 1031 is located on the other side of the first engaging portion 102a-1, and then the bite is closed and the first assembly portion 1031 of the hook is hooked on the first engaging portion 102a-1, so that the patient's lower jaw remains in a predetermined position; if the connecting rod 103 is to be disassembled, the connecting rod 103 can be disengaged from the first engaging portion 102a-1 first, and then the connecting rod 103 can be rotated in the opposite direction to a position where there is no interference with the first engaging portion 102a-1.

[0065] To achieve the movable connection between the second assembly portion 1032 and the second joint portion 102a-2, in some preferred embodiments, as Fig.11 As shown, the second assembly portion 1032 includes a set portion 1032-1 and a traction portion 1032-2, the set portion 1032-1 is a through hole set at the corresponding end of the connecting rod 103, the second joint portion 102a-2 is provided with a through hole for connecting with the traction portion 1032-2, the traction portion 1032-2 is movably connected with the corresponding second joint portion 102a-2, in some specific examples, such as Fig.12 As shown, the traction part 1032-2 can be an integrated structure, which includes a base 1032-21, a connecting part 1032-22 extending from the middle of a surface of the base 1032-21, and a working part 10132-23 formed at the end of the connecting part 1032-22. In this example, in order to allow the traction part 1032-2 to rotate freely in the through hole, the through hole is a circular through hole. Correspondingly, the connecting part 1032-22 is a cylindrical structure, and the diameter of the through hole should be slightly larger than the diameter of the connecting part 1032-22. In this way, the traction part 1032-2 can be movably installed on the second joint part 102a-22. After the sleeve part 1032-1 of the second assembly part 1032 is sleeved on the working part 1032-23 of the traction part 1032-2, The traction portion 1032-2 can rotate around the normal axis of the buccal side surface where the second joint portion 102a-2 is located, so that the connecting rod 103 can rotate around the normal axis of the buccal side surface where the second joint portion 102a-2 is located after being installed through the second assembly portion 1032; in other specific examples, to facilitate the installation of the traction portion 1032-2, the traction portion 1032-2 can also be a split structure. For example, the connecting portion is extended from the surface of one side of the working portion, and the end of the connecting portion is connected to the base by a threaded connection. In this way, during installation, the connecting portion connected to the working portion can be first inserted into the through hole on the second joint portion 102a-2, and then the base and the connecting portion are threadedly connected, so that the traction portion 1032-2 can be movably connected to the second joint portion 102a-2.

[0066] In some other preferred embodiments, the second assembly portion 1032 includes an insertion rod 1032-3 fixedly connected to the end of the connecting rod 103, a through hole for the insertion rod 1032-3 to pass through is provided on the second joint portion 102a-2, and a second limiting structure is provided at one end of the insertion rod 1032-3 away from the connecting rod. When the insertion rod 1032-3 is inserted into the through hole, the second limiting structure is exposed in the second cavity 1014, and the second limiting structure is used to limit the insertion rod 1032-3 from being separated from the through hole. Fig.13As shown, at this time, the second limiting structure is only used to limit the insertion rod 1032-3 from being separated from the through hole but does not limit the rotation of the insertion rod 1032-3 in the through hole. In this embodiment, the second limiting structure includes a second limiting hole (not shown) located on the insertion rod 1032-3 and a limiting rod 1032-4 for inserting into the second limiting hole. When the insertion rod 1032-3 is inserted into the through hole and the second limiting hole of the second limiting structure is exposed to the second cavity 1014, the limiting rod 1032-4 is inserted into the second limiting hole to prevent the insertion rod from being disengaged from the through hole. At this time, the second limiting structure is only used to prevent the insertion rod from being disengaged and does not limit the rotation of the insertion rod in the through hole, so that the second assembly part 1032 is movably connected with the second joint part 102a-2. Similarly, in order to make the rotation of the insertion rod in the through hole more flexible, the through hole on the second joint part 102a-2 is a circular through hole. Correspondingly, the insertion rod 1032-3 is cylindrical, and the diameter of the through hole on the second joint part 102a-2 should be slightly larger than the corresponding cross-sectional diameter of the insertion rod 1032-3, so that when the insertion rod rotates, the hole wall of the through hole will not interfere with the rotation of the insertion rod.

[0067] In other embodiments, the present application also provides a dental correction system, comprising N shell-shaped dental instrument sets for progressively moving a patient's dentition from a first dentition layout to a second dentition layout, characterized in that at least M of the N shell-shaped dental instrument sets are the shell-shaped dental instrument sets of the aforementioned embodiments, wherein M≦N, M, and N are positive integers.

[0068] The first dentition layout can be the original dentition layout of the patient at the beginning of the correction, or it can be the dentition layout after a period of correction. The second dentition layout can be the final dentition layout of the patient after correction, or it can be the stage target layout after correction to a certain stage. Specifically, a three-dimensional digital model of teeth representing the first dentition layout is obtained. For example, a physical tooth model is made according to the patient's current tooth state, or the state of the teeth and surrounding tissues (such as gums, facial soft tissues) (for example, a plaster tooth model is made by taking an impression), and then the physical tooth model is scanned to generate a virtual tooth model representing the original state of the patient's teeth (corresponding to the basic tooth state). Of course, it is also possible to directly obtain images of teeth, or teeth and surrounding tissues through optical scanning, three-dimensional photography, three-dimensional video or medical CT scanning, and generate an original virtual tooth model through computer processing. This virtual tooth model can be digitally processed and displayed.

[0069] Then, based on the virtual tooth model of the first dentition layout and the second dentition layout, at least one correction parameter is set to automatically form a series of tooth correction states that gradually progress to the second dentition layout. The series of tooth correction states reflects the favorable changes to the tooth structure or arrangement after a series of correction steps are performed on the tooth model of the first dentition layout. Generally speaking, the entire correction process includes at least one correction step (for example, 20-40 correction steps), each correction step corresponds to a tooth correction state, and each tooth correction state corresponds to a target tooth three-dimensional digital model.

[0070] Next, a physical tooth model is generated based on the rapid prototyping process according to each target tooth 3D digital model, that is, a corresponding physical tooth model is manufactured according to a series of target tooth 3D digital models. The rapid prototyping technology may include the following typical prototyping processes: Stereolithography Apparatus (SLA), Laminated Object Manufacturing (LOM), Selected Laser Sintering (SLS), Fused Deposition Modeling (FDM), Three Dimensional Printing (3DP), etc.

[0071] After obtaining the physical tooth model of each target tooth three-dimensional digital model, the corresponding shell-shaped dental instrument set can be prepared based on each physical tooth model, such as Fig.14 As shown, each shell-shaped dental instrument set includes a first shell-shaped dental instrument 1 and a second shell-shaped dental instrument 2, and the first shell-shaped dental instrument 1 and the second shell-shaped dental instrument 2 each include an upper shell-shaped dental appliance 10 for wearing on the upper jaw and a corresponding lower shell-shaped dental appliance 11 for wearing on the lower jaw, wherein the upper shell-shaped dental appliance 10 includes a plurality of cavities for accommodating upper teeth, and the lower shell-shaped dental appliance 11 includes a plurality of cavities for accommodating lower teeth, wherein at least M of the N shell-shaped dental instrument sets include a plurality of cavities for accommodating lower teeth. In the shell-shaped dental instrument set, the second shell-shaped dental instrument 2 also includes connecting rods 12 respectively arranged on both sides of its maxillary shell-shaped dental appliance 20 and mandibular shell-shaped dental appliance 21, one end of each connecting rod 12 is connected to the part of the maxillary shell-shaped dental appliance 20 on one side of the second shell-shaped dental instrument 2 close to the front teeth, and the other end is connected to the part of the mandibular shell-shaped dental appliance 21 on the same side of the second shell-shaped dental instrument 2 close to the posterior teeth, so as to keep the patient's lower jaw in a predetermined position, thereby opening the patient's airway and suppressing the patient's snoring.

[0072] In some embodiments, the upper and lower jaw shell-shaped tooth appliances of the first shell-shaped dental appliance 1 in each set of shell-shaped dental appliances have the same geometric shape as the upper and lower jaw shell-shaped tooth appliances of the corresponding second shell-shaped dental appliance 2, so that the first shell-shaped dental appliance 1 and the shell-shaped dental appliance 2 can be obtained based on the same physical tooth model, which is convenient for preparation.

[0073] In other embodiments, the geometric shapes of the upper and lower jaw shell-shaped tooth appliances of the first shell-shaped dental appliance 1 in each set of shell-shaped dental appliances are different from those of the upper and lower jaw shell-shaped tooth appliances of the corresponding second shell-shaped dental appliance 2. The first shell-shaped dental appliance 1 has a geometric shape corresponding to a first designed movement amount to generate a first tooth movement amount that causes tooth movement, and the second shell-shaped dental appliance 2 has a geometric shape corresponding to a second designed movement amount to at least maintain the first tooth movement amount generated by the first shell-shaped dental appliance 1. By designing the second shell-shaped dental appliance worn during the sleep period to at least maintain the first tooth movement amount generated by the first shell-shaped dental appliance 1, the second shell-shaped dental appliance is more comfortable to wear during the wearing process, improving the patient's sleep quality.

[0074] During the orthodontic process of gradually moving the patient's dentition from the first tooth layout to the second tooth layout, the position of the patient's jaw may change. When the position of the patient's jaw changes, if the positions of the first fixing part and the second fixing part used to connect the connecting member on the corresponding upper and lower jaw shell-shaped tooth appliances remain unchanged on the upper and lower jaw shell-shaped tooth appliances corresponding to each orthodontic step, it is inevitable that the connecting member cannot pull the patient's lower jaw to the set position using this connecting member. For example, as the orthodontic treatment progresses, the patient's lower jaw has moved forward. At this time, if the connecting member designed initially and the positions of the first fixing part and the second fixing part on the upper and lower jaw shell-shaped tooth appliances are still used, this connecting member will inevitably not be wearable, and even if it is forcibly worn, it is difficult to generate a sagittal forward pulling force on the lower jaw, making it difficult to achieve the purpose of stopping snoring. Therefore, to avoid this situation, the positions of the first joint part and the second joint part used to connect the connecting rod in the second shell-shaped dental appliance of each set of M shell-shaped dental appliance sets change with the change in the position of the jaw where it is located, so that after connecting the upper jaw shell-shaped tooth appliance and the lower jaw shell-shaped tooth appliance through the first joint part and the second joint part in each orthodontic step, the patient's lower jaw can be maintained at the predetermined position. That is to say, when the patient's lower jaw moves forward during the orthodontic process, it is necessary to adjust the positions of the first joint part and the second joint part on the upper and lower jaw shell-shaped tooth appliances according to the change in the position of the jaw. The purpose of this change in position is to enable the connecting member to keep the patient's lower jaw at the predetermined position after being joined to the upper jaw shell-shaped tooth appliance and the lower jaw shell-shaped tooth appliance, thereby opening the patient's airway and suppressing the patient's snoring.

[0075] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A shell-shaped dental instrument set, characterized in that: The invention comprises a first shell-shaped dental appliance and a second shell-shaped dental appliance for gradually moving a patient's dentition from a first layout to a second layout, wherein the first shell-shaped dental appliance and the second shell-shaped dental appliance both comprise a maxillary shell-shaped dental appliance and a corresponding mandibular shell-shaped dental appliance, wherein the maxillary shell-shaped dental appliance comprises a plurality of cavities for accommodating maxillary teeth, and the mandibular shell-shaped dental appliance comprises a plurality of cavities for accommodating mandibular teeth, wherein the first shell-shaped dental appliance and the second shell-shaped dental appliance are respectively used for being worn by the patient during non-sleeping period and during sleeping period, and the second shell-shaped dental appliance further comprises connecting rods respectively arranged on both sides of the maxillary shell-shaped dental appliance and the mandibular shell-shaped dental appliance, wherein one end of each connecting rod is connected to a part of the maxillary shell-shaped dental appliance on one side close to the front teeth, and the other end is connected to a part of the mandibular shell-shaped dental appliance on the same side close to the back teeth, so as to keep the patient's lower jaw in a predetermined position, thereby opening the patient's airway and suppressing the patient's snoring. Wherein: the upper and lower shell-shaped dental appliances of the first shell-shaped dental instrument have the same geometric shape as the upper and lower shell-shaped dental appliances of the corresponding second shell-shaped dental instrument; or, the upper and lower shell-shaped dental appliances of the first shell-shaped dental instrument have different geometric shapes from the upper and lower shell-shaped dental appliances of the corresponding second shell-shaped dental instrument, the first shell-shaped dental instrument has a geometric shape corresponding to a first designed movement amount to produce a first tooth movement amount that causes tooth movement, and the second shell-shaped dental instrument has a geometric shape corresponding to a second designed movement amount to at least maintain the first tooth movement amount produced by the first shell-shaped dental instrument.

2. The shell-shaped dental instrument set according to claim 1, characterized in that: The elasticity of the shell-shaped dental appliance of the second shell-shaped dental appliance is different from the elasticity of the shell-shaped dental appliance of the first shell-shaped dental appliance.

3. The shell-shaped dental instrument set according to claim 2, characterized in that: The elasticity of the shell-shaped dental appliance of the second shell-shaped dental appliance is greater than the elasticity of the shell-shaped dental appliance of the first shell-shaped dental appliance.

4. The shell-shaped dental instrument set according to claim 3, characterized in that: The elasticity of the shell-shaped dental appliance of the second shell-shaped dental instrument is greater than the elasticity of the shell-shaped dental appliance of the first shell-shaped dental instrument based on the difference in at least one of the shell thickness and the elastic modulus of the material of the shell-shaped dental appliance of the second shell-shaped dental instrument and the first shell-shaped dental instrument.

5. The shell-shaped dental instrument set according to claim 1, characterized in that: The elasticity of the shell-shaped dental appliance of the second shell-shaped dental appliance is the same as the elasticity of the shell-shaped dental appliance of the first shell-shaped dental appliance.

6. The shell-shaped dental instrument set according to any one of claims 1 to 5, characterized in that: A first designed movement amount of the shell-shaped dental appliance of the first shell-shaped dental appliance is greater than a second designed movement amount of the shell-shaped dental appliance of the second shell-shaped dental appliance.

7. The shell-shaped dental instrument set according to any one of claims 1 to 5, characterized in that: The connecting rod is a rigid member, one end of which is provided with a first assembly portion, which is connected to a first joint portion arranged at a position of the maxillary shell-shaped appliance of the second shell-shaped dental instrument close to the front teeth, and the other end is provided with a second assembly portion, which is connected to a second joint portion arranged at a position of the mandibular shell-shaped appliance of the second shell-shaped dental instrument close to the posterior teeth, so as to connect the connecting rod to the corresponding positions of the upper and lower mandibular shell-shaped appliances of the second shell-shaped dental instrument and keep the patient's mandible in a predetermined position.

8. The shell-shaped dental instrument set according to claim 7, characterized in that: Each assembly portion is fixed to the corresponding first joining portion or the second joining portion by bonding or welding.

9. The shell-shaped dental instrument set according to claim 7, characterized in that: Each assembling portion is detachably connected to the corresponding first engaging portion or the second engaging portion.

10. The shell-shaped dental instrument set according to claim 9, characterized in that: Each assembly portion is threadedly connected to the corresponding first engaging portion or second engaging portion.

11. The shell-shaped dental instrument set according to claim 9, characterized in that: Each assembly part includes an insertion rod fixedly connected to the end of the connecting rod, a locking part is provided on the end of the insertion rod away from the connecting rod, and a socket corresponding to the insertion rod is provided on the corresponding first joint part or the second joint part. After the insertion rod is inserted into the corresponding socket, the locking part is used to limit the insertion rod to the socket.

12. The shell-shaped dental instrument set according to claim 9, characterized in that: Each assembly part includes a fixed end and a plug-in end, the fixed end is fixedly connected to the connecting rod, the plug-in end is located at the part of the assembly part away from the connecting rod, the plug-in end includes a guide part and a deformation part arranged adjacent to the guide part, the first joint part and / or the second joint part is provided with a guide channel and a deformation part receiving cavity arranged adjacent to the guide channel, when it is necessary to assemble the connecting rod with the second shell-shaped dental instrument, the first assembly part and / or the second assembly part is inserted into the guide channel corresponding to the first joint part and / or the second joint part, the deformation part is compressed and deformed under the guidance of the guide channel and passes through the guide channel to enter the deformation part receiving cavity and then restores its original shape, and the guide part is confined in the guide channel; When the connecting rod needs to be disassembled and the first assembly part and / or the second assembly part needs to be pulled out, the deformation part enters the guide channel under the guidance of the guide channel and is compressed and deformed, and after passing through the guide channel, it disengages from the corresponding first joint part and / or the second joint part to achieve disassembly.

13. The shell-shaped dental instrument set according to claim 12, characterized in that: The portion of the deformation part close to the guide part forms a first guide slope to facilitate the deformation part to detach from the deformation part accommodating cavity, and a second guide slope is formed away from the guide part and adjacent to the first guide slope to facilitate the deformation part to be inserted into the guide channel.

14. The shell-shaped dental instrument set according to claim 7, characterized in that: One of the first assembly part and the second assembly part is a hook formed by one end of the connecting rod, and the other assembly part is fixedly connected or detachably connected to the corresponding first coupling part or the second coupling part, and the hook part hooks the corresponding first coupling part or the second coupling part so that the connecting rod is connected to the upper and lower shell-shaped dental appliances of the second shell-shaped dental instrument.

15. The shell-shaped dental instrument set according to claim 14, characterized in that: The other assembly portion is movably connected to the corresponding first engaging portion or the second engaging portion.

16. A dental correction system, comprising a set of N shell-shaped dental instruments for progressively moving a patient's dentition from a first dentition configuration to a second dentition configuration, characterized in that: At least M of the N shell-shaped dental instrument sets are shell-shaped dental instrument sets as described in any one of claims 1 to 15, wherein M≦N, M, N are positive integers.

17. The dental correction system according to claim 16, wherein: The positions of the first joint portion and the second joint portion for connecting the connecting rod in the second shell-shaped dental instrument of each shell-shaped dental instrument set of the M shell-shaped dental instrument sets change with the position of the jaw in which they are located, so that in each correction step, after the connecting rod is connected to the maxillary shell-shaped dental appliance and the mandibular shell-shaped dental appliance through the first joint portion and the second joint portion, the patient's lower jaw can be maintained in the predetermined position.

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