Invisible appliance system

Abstract

The utility model discloses an invisible orthodontic appliance system which comprises a plurality of invisible orthodontic appliance groups, the plurality of invisible orthodontic appliance groups are configured to be worn in sequence according to groups, and each invisible orthodontic appliance group comprises a plurality of invisible orthodontic appliances respectively corresponding to a plurality of orthodontic steps. The plurality of invisible correctors of each invisible corrector group are configured as follows: the number M teeth are distally moved in the Nth correction step, the number M1 teeth are distally moved in the (N + N1) th correction step, N and N1 are positive integers, the number M teeth and the number M1 teeth are arranged in the first region from the distal middle to the mesial middle, and the first region from the distal middle is the left region or the right region of the tooth jaw. According to the utility model, a patient can see the correction effect earlier, and the correction scheme can be optimized in time or terminated in advance; the supporting force borne by the anterior teeth is relatively small, and the anterior teeth are not prone to excessive lip inclination; the design difficulty and the design time can be greatly reduced, and the correction effect is controllable or predictable.

Description

Technical Field

[0001] The utility model relates to the technical field of tooth correction, and particularly relates to an invisible appliance system. Background Art

[0002] Due to advantages such as aesthetics, convenience, and being conducive to cleaning, invisible appliances made of polymer materials are becoming increasingly popular. Generally, for orthodontic treatment using invisible appliances, a series of successive invisible appliances are required, and the geometric shape of the cavity for accommodating teeth in each of these invisible appliances basically matches the tooth layout desired for the corresponding correction step.

[0003] In some invisible correction processes, it is necessary to use invisible appliances to move the molars distally, so as to provide space for the lingual movement, alignment and intrusion of the anterior teeth. In the prior art, the distal movement and alignment of teeth are achieved in the order of 7, 6, 5, 4, 3, 2, 1, that is, the No. 7 tooth arrives first, then the No. 6 tooth is moved, and so on until alignment. However, the anterior teeth can only show changes at the final stage of the correction, and the distal movement amount of the posterior teeth is too large each time, and the anterior teeth are prone to excessive labial inclination due to excessive resistance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an invisible appliance system, which helps to improve the patient experience and wearing compliance.

[0005] An embodiment of the utility model provides an invisible appliance system, including multiple groups of invisible appliance groups, which are configured to be worn in sequence by group. Each invisible appliance group includes multiple invisible appliances corresponding to multiple correction steps respectively. The multiple invisible appliances in each invisible appliance group are configured as follows: at the Nth correction step, the No. M tooth starts to move distally, and at the (N + N1)th correction step, the No. M1 tooth starts to move distally, where N and N1 are positive integers, and the No. M tooth and the No. M1 tooth are arranged in the direction from distal to mesial in the first area, and the first area is the left area or the right area of the dental arch.

[0006] Optionally, the multiple invisible appliances in each invisible appliance group are configured as follows: at the (N + N2)th correction step, the No. M2 tooth starts to move distally, where N2 is a positive integer and N2 > N1, and the No. M tooth, the No. M1 tooth, and the No. M2 tooth are arranged in the direction from distal to mesial in the first area.

[0007] Optionally, the No. M1 tooth is the anterior tooth in the first area. After the (N + N1)th correction step is completed, the next invisible appliance group starts to be worn.

[0008] Optionally, a plurality of invisible aligners in each invisible aligner group are configured such that in the Nth orthodontic step, the tooth numbered M and the tooth numbered M' are simultaneously distalized, the tooth numbered M' is located in the second region, one of the first region and the second region is the left region of the dental arch, and the other is the right region of the dental arch, and the numbers of the tooth numbered M and the tooth numbered M' correspond to each other in the numbering system.

[0009] Optionally, a plurality of invisible aligners in each invisible aligner group are configured such that in the Nth orthodontic step, the tooth numbered M and the tooth numbered L are simultaneously distalized, the tooth numbered M and the tooth numbered L are adjacent teeth in the first region, and / or in the (N + N1)th orthodontic step, the tooth numbered M1 and the tooth numbered L1 are simultaneously distalized, the tooth numbered M1 and the tooth numbered L1 are adjacent teeth in the first region.

[0010] Optionally, a plurality of invisible aligners in each invisible aligner group are configured such that in the (N + 1)th orthodontic step, the tooth numbered M is continuously distalized, N1 > 1, and / or in the (N + N1 + 1)th orthodontic step, the tooth numbered M1 is continuously distalized.

[0011] Optionally, during the entire orthodontic treatment, the number of invisible aligner groups is not greater than 4.

[0012] Optionally, the invisible aligner corresponding to the Nth orthodontic step has at least a first stepwise distalization amount for distalizing the tooth numbered M, and the invisible aligner corresponding to the (N + N1)th orthodontic step has at least a second stepwise distalization amount for distalizing the tooth numbered M1.

[0013] Optionally, the first stepwise distalization amount is substantially the same as the second stepwise distalization amount.

[0014] Optionally, the invisible aligner corresponding to the Nth orthodontic step further has a third stepwise distalization amount for distalizing the tooth numbered L, the tooth numbered M and the tooth numbered L are adjacent teeth in the first region, and / or the invisible aligner corresponding to the (N + N1)th orthodontic step further has a fourth stepwise distalization amount for distalizing the tooth numbered L1, the tooth numbered M1 and the tooth numbered L1 are adjacent teeth in the first region.

[0015] Optionally, the third stepwise distalization amount is substantially the same as the first stepwise distalization amount, and the fourth stepwise distalization amount is substantially the same as the second stepwise distalization amount.

[0016] Optionally, the invisible aligner corresponding to the (N + 1)th orthodontic step has a fifth stepwise distalization amount for distalizing the tooth numbered M, N1 > 1, and / or the invisible aligner corresponding to the (N + N1 + 1)th orthodontic step has a sixth stepwise distalization amount for distalizing the tooth numbered M1.

[0017] Optionally, the fifth stepwise distalization amount is not greater than the first stepwise distalization amount, and the sixth stepwise distalization amount is not greater than the second stepwise distalization amount.

[0018] Optionally, at least one set of invisible aligners is configured such that the invisible aligner corresponding to a certain orthodontic step has a stepwise distal movement amount for a certain tooth corresponding to the first region, and the stepwise distal movement amounts of multiple orthodontic steps sequentially move multiple teeth distally, and the multiple teeth are multiple teeth arranged in sequence from distal to mesial in the first region.

[0019] Optionally, the multiple teeth are multiple teeth numbered 7, 6, 5, 4, 3, 2, 1 in the first region, and the stepwise distal movement amount of each invisible aligner corresponding to the other teeth in the first region is zero.

[0020] Optionally, a certain invisible aligner simultaneously has a stepwise distal movement amount corresponding to a certain tooth in the first region and other design amounts corresponding to the other teeth in the first region.

[0021] Optionally, the multiple teeth arranged in sequence from distal to mesial have a target distal movement amount, and the target distal movement amount is divided into multiple stepwise distal movement amounts corresponding to multiple sets of invisible aligners according to the number of steps.

[0022] Optionally, when the target distal movement amount is greater than 2 mm and less than 4 mm, the number of steps is 2, and when the target distal movement amount is greater than or equal to 4 mm, the number of steps is 3 or 4.

[0023] Optionally, the target distal movement amount includes a first target distal movement amount corresponding to multiple teeth in the first region and a second target distal movement amount corresponding to multiple teeth in the second region. The number of steps of the first target distal movement amount is the same as that of the second target distal movement amount. One of the first region and the second region is the left region of the dental arch, and the other is the right region of the dental arch.

[0024] Optionally, the target distal movement amount includes a third target distal movement amount corresponding to multiple teeth in the first region and a fourth target distal movement amount corresponding to multiple teeth in the third region. One of the first region and the third region corresponds to the maxillary teeth, and the other corresponds to the mandibular teeth, and there is an occlusal relationship between the first region and the third region. Among them, the third target distal movement amount is greater than the fourth target distal movement amount. The third target distal movement amount is divided into multiple third sub - distal movement amounts. When the fourth target distal movement amount is not greater than the third sub - distal movement amount in the first set of invisible aligners, the fourth target distal movement amount is divided into one fourth sub - distal movement amount and applied to the first set of invisible aligners; when the fourth target distal movement amount is greater than the third stepwise distal movement amount in the first set of invisible aligners, the fourth target distal movement amount is divided into multiple fourth sub - distal movement amounts, and at least the third sub - distal movement amount in the first set of invisible aligners is equal to the fourth sub - distal movement amount.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows: (1) When applied to the scenario of anterior tooth retraction, a certain degree of anterior tooth retraction can be achieved in the first round of distal movement cycle, and patients can see the orthodontic effect earlier, which can greatly improve the patient experience and wearing compliance; (2) The orthodontic effect can be observed after the first round of distal movement cycle (or the first few rounds of distal movement cycles), and the orthodontic plan can be optimized in time or terminated in advance; (3) Since the tooth distal movement plan is divided into multiple rounds of distal movement cycles, the distal movement amount corresponding to each tooth in each round of distal movement cycle is relatively small. When the tooth is a posterior tooth, the corresponding distal movement amount of the posterior tooth is small, and the resistance borne by the anterior teeth is also relatively small, so the anterior teeth are not likely to show excessive labial inclination; (4) The tooth arrangement plan for each round of distal movement cycle is similar to the tooth arrangement plan in the prior art, which can greatly reduce the design difficulty and design time, and the orthodontic effect is also relatively controllable or predictable. Description of the Drawings

[0026] Figure 1 is a schematic diagram of a set of invisible orthodontic appliances according to an embodiment of the present utility model;

[0027] Figure 2 is a schematic diagram of a patient's dental arch according to an embodiment of the present utility model;

[0028] Figure 3 is a schematic diagram of the distal movement design of multiple teeth in one round of distal movement cycle according to an embodiment of the present utility model;

[0029] Figure 4 is a schematic diagram of an invisible orthodontic appliance system according to an embodiment of the present utility model;

[0030] Figure 5 is a design drawing of the step-by-step distal movement amount according to an embodiment of the present utility model;

[0031] Figures 6a to 6c is a schematic diagram of the change of the patient's dental arch in the first round of distal movement cycle according to an embodiment of the present utility model;

[0032] Figures 7a to 7c is a schematic diagram of the change of the patient's dental arch in the second round of distal movement cycle according to an embodiment of the present utility model;

[0033] Figure 8 is a schematic diagram of the step-by-step distal movement amount of the first region and the second region designed according to an embodiment of the present utility model;

[0034] Figure 9 is a schematic diagram of the step-by-step distal movement amount of the first region and the third region designed according to an embodiment of the present utility model;

[0035] Figure 10a and Figure 10b is a schematic diagram of the anterior tooth change with different distribution forms of the fourth target distal movement amount. Detailed Embodiments

[0036] The following will describe the present utility model in detail in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present utility model, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present utility model.

[0037] It should be noted that the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] Combined with Figures 1 to 4 , an embodiment of the present utility model provides an invisible orthodontic appliance system 100.

[0039] The invisible orthodontic appliance system 100 includes multiple groups of invisible orthodontic appliance groups 10, and the multiple groups of invisible orthodontic appliance groups 10 are configured to be worn successively by group. Each invisible orthodontic appliance group 10 includes multiple invisible orthodontic appliances corresponding to multiple orthodontic steps respectively.

[0040] Optionally, for example, in the application scenario of anterior tooth retraction, it is necessary to distalize the molars to provide space for anterior tooth retraction. The invisible orthodontic appliance system 100 of this embodiment is applied to the entire orthodontic process of anterior tooth retraction, that is, during the entire orthodontic process of anterior tooth retraction, multiple groups of invisible orthodontic appliance groups 10 are worn successively by group to achieve gradual orthodontics and finally complete the retraction of the anterior teeth.

[0041] In other embodiments, it can also be applied to application scenarios such as aligning and depressing anterior teeth. This embodiment takes the anterior tooth retraction scenario as an example.

[0042] "The multiple groups of invisible orthodontic appliance groups 10 are configured to be worn successively by group" means that as the orthodontic steps progress, the patient first wears multiple invisible orthodontic appliances in the first group of invisible orthodontic appliance groups 10 successively, and then the patient wears multiple invisible orthodontic appliances in the second group of invisible orthodontic appliance groups 10 successively, and so on, until the patient wears all the multiple groups of invisible orthodontic appliance groups 10.

[0043] The multiple invisible orthodontic appliances in each invisible orthodontic appliance group 10 are configured such that the Mth tooth starts to be distalized at the Nth orthodontic step, and the M1th tooth starts to be distalized at the N + N1th orthodontic step, where N and N1 are positive integers, and the Mth tooth and the M1th tooth are arranged in the direction from distal to mesial in the first area, and the first area is the left area or the right area of the dental arch.

[0044] In the same dental arch, taking the midline L between two adjacent central incisors as the boundary, the dental arch can be divided into a left region and a right region. The left region includes multiple teeth arranged from distal to mesial, and the right region includes multiple teeth arranged from distal to mesial.

[0045] Multiple invisible aligners of each invisible aligner set 10 correspond to multiple treatment steps. The multiple treatment steps include the Nth treatment step and the (N + N1)th treatment step, that is, the Nth treatment step and the (N + N1)th treatment step are any two treatment steps among the multiple treatment steps. For example, other treatment steps may exist before the Nth treatment step, after the (N + N1)th treatment step, and between the Nth treatment step and the (N + N1)th treatment step. Or, the Nth treatment step and the (N + N1)th treatment step are two consecutive treatment steps, etc.

[0046] Multiple treatment steps corresponding to each invisible aligner set 10 first distalize tooth M and then distalize tooth M1, which can achieve the gradual distal movement of multiple teeth arranged from distal to mesial. "Multiple teeth arranged from distal to mesial" can refer to multiple continuously arranged teeth or multiple spaced teeth.

[0047] In this embodiment, tooth M1 is the anterior tooth in the first region. After the (N + N1)th treatment step is completed, the next invisible aligner set 10 is started to be worn, that is, the next invisible aligner set 10 is started to be worn after the anterior teeth are retracted.

[0048] The teeth involved in the gradual distal movement are not limited to the above-mentioned tooth M and tooth M1. For example, multiple invisible aligners of each invisible aligner set 10 are configured such that the (N + N2)th treatment step starts to distalize tooth M2, where N2 is a positive integer and N2 > N1, and tooth M, tooth M1, and tooth M2 are arranged from distal to mesial in the first region.

[0049] When wearing a certain invisible aligner set 10, tooth M and tooth M1 can be gradually distalized, or tooth M, tooth M1, and tooth M2 can be gradually distalized. The number of teeth gradually distalized by wearing a set of invisible aligner set 10 can be determined according to the actual situation.

[0050] It should be noted that "tooth distal movement" refers to the movement of the tooth along the dental arch curve in the distal direction. When the tooth is an anterior tooth, "tooth distal movement" mainly refers to the movement of the anterior tooth in the distal direction during the retraction process.

[0051] In this embodiment, a set of invisible aligner set 10 can achieve one round of distal movement cycle of multiple teeth arranged from distal to mesial. Multiple sets of invisible aligner set 10 can achieve multiple rounds of distal movement cycles of multiple teeth arranged from distal to mesial. When multiple sets of invisible aligner set 10 are worn in sequence, multiple rounds of distal movement cycles can be achieved in sequence.

[0052] Compared with the prior art where the tooth distal movement plan is designed with only one round of distal movement cycle, the advantage of dividing the tooth distal movement plan into multiple rounds of distal movement cycles in this embodiment is as follows: (1) When applied to the anterior tooth retraction scenario, a certain degree of anterior tooth retraction can be achieved in the first round of distal movement cycle, and the patient can see the orthodontic effect earlier, which can greatly improve the patient experience and wearing compliance; (2) The orthodontic effect can be observed after the first round of distal movement cycle (or the first few rounds of distal movement cycles), and the orthodontic plan can be optimized in time or terminated in advance; (3) Since the tooth distal movement plan is divided into multiple rounds of distal movement cycles, the distal movement amount corresponding to each tooth in each round of distal movement cycle is smaller. When the tooth is a posterior tooth, the corresponding distal movement amount of the posterior tooth is smaller, and the resistance borne by the anterior teeth is also relatively smaller, so the anterior teeth are not prone to excessive labial inclination; (4) The tooth arrangement plan for each round of distal movement cycle is similar to the tooth arrangement plan in the prior art, which can greatly reduce the design difficulty and design duration, and the orthodontic effect is also relatively controllable or predictable.

[0053] Optionally, during the entire orthodontic process, the number of groups of the invisible orthodontic appliance group 10 is not greater than 4.

[0054] "The entire orthodontic process" corresponds to the entire process of the aforementioned anterior tooth retraction. In practical applications, in addition to anterior tooth retraction, other orthodontic operations can also be designed for the patient.

[0055] When the number of groups of the invisible orthodontic appliance group 10 is too large, during the process of wearing multiple groups of the invisible orthodontic appliance group 10 in sequence, the teeth serving as anchorage change frequently, resulting in repeated anchorage and thus affecting the orthodontic effect. Therefore, the number of groups of the invisible orthodontic appliance group 10 needs to be controlled within a reasonable range.

[0056] Optionally, multiple invisible orthodontics in each invisible orthodontic appliance group 10 are configured such that: in the Nth orthodontic step, the Mth tooth and the M'th tooth are simultaneously distally moved. The M'th tooth is located in the second region, and one of the first region and the second region is the left region of the dental arch, and the other is the right region of the dental arch. The numbers of the Mth tooth and the M'th tooth correspond to each other in the numbering system.

[0057] Combined Figure 2 , the patient's dental arch includes a first region A1 and a second region A2. The numbers corresponding to multiple teeth arranged in sequence from distal to mesial in the first region A1 are 7, 6, 5, 4, 3, 2, 1.

[0058] The numbers corresponding to multiple teeth arranged in sequence from distal to mesial in the second region A2 are 7', 6', 5', 4', 3', 2', 1'. Here, the first region A1 is taken as the left region of the dental arch and the second region A2 is taken as the right region of the dental arch as an example.

[0059] Among them, teeth 7 and 7' are both second molars, teeth 6 and 6' are both first molars, teeth 5 and 5' are both second premolars, teeth 4 and 4' are both first premolars, teeth 3 and 3' are both canines, teeth 2 and 2' are both lateral incisors, teeth 1 and 1' are both central incisors, and the middle seam L between teeth 1 and 1' is used as the boundary to divide the jaw into the first area A1 and the second area A2.

[0060] "The numbers of tooth No. M and tooth No. M' correspond to each other in the numbering system" means that tooth No. M and tooth No. M' are bilaterally symmetrical teeth. For example, tooth No. M and tooth No. M' are tooth No. 7 in the first area A1 and tooth No. 7' in the second area A2, or tooth No. M and tooth No. M' are tooth No. 2 in the first area A1 and tooth No. 2' in the second area A2, etc.

[0061] When the invisible braces are worn, teeth No. M and No. M' are moved away at the same time, that is, the first area A1 and the second area A2 are corrected at the same time. In this way, when multiple invisible braces are worn in sequence, the front teeth in the first area A1 and the second area A2 can be retracted at the same time, thereby improving the correction efficiency.

[0062] Optionally, the multiple invisible braces of each invisible braces group 10 are configured as follows: in the Nth correction step, teeth No. M and No. L are simultaneously moved distally, and teeth No. M and No. L are adjacent teeth in the first area, and / or in the N+N1th correction step, teeth No. M1 and No. L1 are simultaneously moved distally, and teeth No. M1 and No. L1 are adjacent teeth in the first area.

[0063] Combination Figure 2 Assuming that tooth No. M and tooth No. L are tooth No. 7 and tooth No. 6 in the first area A1 respectively, then the Nth correction step simultaneously moves tooth No. 7 and tooth No. 6 in the first area A1 away.

[0064] Assuming that tooth M1 and tooth L1 are tooth No. 2 and tooth No. 1 in the first area A1 respectively, the N+N1-th correction step simultaneously moves tooth No. 2 and tooth No. 1 in the first area A1 far away.

[0065] Optionally, the multiple invisible braces of each invisible brace set 10 are configured as follows: the N+1th correction step continues to move tooth No. M further away, N1>1, and / or the N+N1+1th correction step continues to move tooth No. M1 further away.

[0066] Combination Figure 2 Assuming that tooth No. M is tooth No. 7 in the first area A1, the consecutive Nth correction step and the N+1th correction step are both moved away from tooth No. 7.

[0067] Assuming that tooth M1 is tooth No. 2 in the first area A1, the consecutive correction steps N+N1 and N+N1+1 are both moved away from tooth No. 2.

[0068] As can be seen, taking multiple teeth in the first region A1 as an example, for multiple correction steps in one round of distal movement cycle (i.e., a set of invisible orthodontic appliances 10), each correction step can distalize only one tooth, or each correction step can distalize multiple teeth simultaneously.

[0069] For example, the distal movement design for multiple teeth in one round of distal movement cycle is: 7, 7, 76, 76, 6, 6, 65, 65, 5, 5, 54, 54, 4, 4, 43, 43, 3, 3, 32, 32, 2, 2, 21, 21. That is, in this round of distal movement cycle, in the 1st correction step and the 2nd correction step, only the tooth No. 7 is distalized; in the 3rd correction step and the 4th correction step, the tooth No. 7 and the tooth No. 6 are distalized simultaneously; in the 5th correction step and the 6th correction step, only the tooth No. 6 is distalized; in the 7th correction step and the 8th correction step, the tooth No. 6 and the tooth No. 5 are distalized simultaneously; in the 9th correction step and the 10th correction step, only the tooth No. 5 is distalized; in the 11th correction step and the 12th correction step, the tooth No. 5 and the tooth No. 4 are distalized simultaneously; in the 13th correction step and the 14th correction step, only the tooth No. 4 is distalized; in the 15th correction step and the 16th correction step, the tooth No. 4 and the tooth No. 3 are distalized simultaneously; in the 17th correction step and the 18th correction step, only the tooth No. 3 is distalized; in the 19th correction step and the 20th correction step, the tooth No. 3 and the tooth No. 2 are distalized simultaneously; in the 21st correction step and the 22nd correction step, only the tooth No. 2 is distalized; in the 23rd correction step and the 24th correction step, the tooth No. 2 and the tooth No. 1 are distalized simultaneously.

[0070] The distal movement design for multiple teeth in one round of distal movement cycle can be, for example: 7, 6, 5, 4, 3, 2, 1, or 7, 7, 6, 6, 5, 5, 4, 3, 2, 1, or 76, 65, 54, 43, 32, 21, or 765, 65, 54, 43, 321, etc., which can be determined according to the actual situation.

[0071] Combined with Figure 3 , taking multiple teeth in the first region A1 as an example, in the 1st correction step, the tooth No. 7 is distalized; in the 2nd correction step, the tooth No. 7 and the tooth No. 6 are distalized simultaneously; in the 3rd correction step, the tooth No. 6 and the tooth No. 5 are distalized simultaneously; in the 4th correction step, the tooth No. 5 and the tooth No. 4 are distalized simultaneously; in the 5th correction step, the tooth No. 4 and the tooth No. 3 are distalized simultaneously; in the 6th correction step, the tooth No. 3, the tooth No. 2 and the tooth No. 1 are distalized simultaneously. That is, the distal movement design for multiple teeth in this round of distal movement cycle is: 7, 76, 65, 54, 43, 321.

[0072] In this embodiment, the invisible orthodontic appliance corresponding to the Nth correction step has at least a first step-by-step distal movement amount for distalizing the tooth No. M, and the invisible orthodontic appliance corresponding to the N+N1th correction step has at least a second step-by-step distal movement amount for distalizing the tooth No. M1.

[0073] The invisible orthodontic appliance is designed with a step-by-step distal movement amount at the position of a certain tooth corresponding to the first region A1. When wearing this invisible orthodontic appliance, the corresponding tooth is distalized.

[0074] It should be noted that when a step-by-step distal movement amount is designed at the position of a certain tooth corresponding to the first region A1, other design amounts can be set at the position corresponding to this tooth, such as rotation amount, torsion amount, intrusion amount, etc. When wearing this invisible orthodontic appliance, distal movement and other movements of this tooth can be achieved simultaneously.

[0075] Optionally, the first step-by-step distal movement amount is substantially the same as the second step-by-step distal movement amount.

[0076] The posterior tooth can make full use of the space generated by the distal movement of the anterior tooth. After one round of distal movement cycle, the space between adjacent teeth is small, avoiding the inclination or displacement of teeth during the force application process due to excessive space.

[0077] Optionally, the first step-by-step distal movement amount and the second step-by-step distal movement amount can also be different. For example, when there are large spaces between multiple teeth in the initial state, the space can be reduced by adjusting the step-by-step distal movement amount.

[0078] Optionally, the invisible orthodontic appliance corresponding to the Nth orthodontic step further has a third step-by-step distal movement amount for distal movement of tooth L, teeth M and L are adjacent teeth in the first region, and / or the invisible orthodontic appliance corresponding to the (N + N1)th orthodontic step further has a fourth step-by-step distal movement amount for distal movement of tooth L1, teeth M1 and L1 are adjacent teeth in the first region.

[0079] The first step-by-step distal movement amount and the third step-by-step distal movement amount can respectively distal move teeth M and L in the Nth orthodontic step, that is, the Nth orthodontic step distally moves teeth M and L simultaneously; the second step-by-step distal movement amount and the fourth step-by-step distal movement amount can respectively distal move teeth M1 and L1 in the (N + N1)th orthodontic step, that is, the (N + N1)th orthodontic step distally moves teeth M1 and L1 simultaneously.

[0080] Optionally, the third step-by-step distal movement amount is substantially the same as the first step-by-step distal movement amount, and the fourth step-by-step distal movement amount is substantially the same as the second step-by-step distal movement amount.

[0081] Optionally, the invisible orthodontic appliance corresponding to the (N + 1)th orthodontic step has a fifth step-by-step distal movement amount for distal movement of tooth M, N1 > 1, and / or the invisible orthodontic appliance corresponding to the (N + N1 + 1)th orthodontic step has a sixth step-by-step distal movement amount for distal movement of tooth M1.

[0082] The first step-by-step distal movement amount and the fifth step-by-step distal movement amount can respectively distal move tooth M in the Nth orthodontic step and the (N + 1)th orthodontic step, that is, the consecutive Nth orthodontic step and the (N + 1)th orthodontic step both distally move tooth M; the second step-by-step distal movement amount and the sixth step-by-step distal movement amount respectively distal move tooth M1 in the (N + N1)th orthodontic step and the (N + N1 + 1)th orthodontic step, that is, the consecutive (N + N1)th orthodontic step and the (N + N1 + 1)th orthodontic step both distally move tooth M1.

[0083] Optionally, the fifth step-by-step distal movement amount is not greater than the first step-by-step distal movement amount, and the sixth step-by-step distal movement amount is not greater than the second step-by-step distal movement amount, but not limited thereto.

[0084] Optionally, a certain invisible aligner simultaneously has a step-by-step distal movement amount corresponding to a certain tooth in the first region A1 and other design amounts corresponding to other teeth in the first region A1. The other design amounts are, for example, rotation amount, torsion amount, intrusion amount, etc.

[0085] When wearing a certain invisible aligner, the distal movement of a certain tooth and the other movements of other teeth can be simultaneously achieved, that is, other orthodontics except for distal movement can be added in advance, and due to multiple rounds of distal movement cycles, other movements can also be adjusted or optimized in a timely manner.

[0086] Optionally, at least one group of invisible aligner groups 10 is configured such that the invisible aligner corresponding to a certain orthodontic step has a step-by-step distal movement amount corresponding to a certain tooth in the first region A1, and the step-by-step distal movement amounts of multiple orthodontic steps sequentially distalize multiple teeth, and the multiple teeth are multiple teeth arranged in sequence from distal to mesial in the first region.

[0087] "The step-by-step distal movement amounts of multiple orthodontic steps sequentially distalize multiple teeth, and the multiple teeth are multiple teeth arranged in sequence from distal to mesial in the first region" means that in a certain invisible aligner group 10, multiple invisible aligners have step-by-step distal movement amounts corresponding to different teeth, and the different teeth refer to multiple teeth arranged in sequence from distal to mesial in the first region A1. When wearing multiple invisible aligners in sequence, the distal movement of multiple teeth arranged in sequence from distal to mesial is sequentially achieved, that is, first the distal tooth is distalized, and then the tooth located in the mesial direction of the previous tooth is distalized, and so on, and the distal movement of multiple teeth is sequentially achieved.

[0088] Optionally, the multiple teeth are multiple teeth numbered 7, 6, 5, 4, 3, 2, 1 in the first region A1, that is, the distal movement of tooth No. 7, tooth No. 6, tooth No. 5, tooth No. 4, tooth No. 3, tooth No. 2, and tooth No. 1 is sequentially achieved.

[0089] Optionally, the step-by-step distal movement amount of each invisible aligner corresponding to other teeth in the first region A1 is zero, that is, when designing the invisible aligner, no step-by-step distal movement amount is designed for other teeth in the first region A1. For example, only the step-by-step distal movement amount corresponding to tooth No. 7 is designed for the first orthodontic step, only the step-by-step distal movement amount corresponding to tooth No. 6 is designed for the second orthodontic step, only the step-by-step distal movement amount corresponding to tooth No. 5 is designed for the third orthodontic step, only the step-by-step distal movement amount corresponding to tooth No. 4 is designed for the fourth orthodontic step, only the step-by-step distal movement amount corresponding to tooth No. 3 is designed for the fifth orthodontic step, only the step-by-step distal movement amount corresponding to tooth No. 2 is designed for the sixth orthodontic step, and only the step-by-step distal movement amount corresponding to tooth No. 1 is designed for the seventh orthodontic step. That is, the distal movement design of multiple teeth in this round of distal movement cycle is: 7, 6, 5, 4, 3, 2, 1.

[0090] Optionally, in the multiple sets of invisible orthodontic appliance groups 10, the multiple step-by-step distal movement amounts corresponding to the same tooth are the same, or, in the multiple sets of invisible orthodontic appliance groups 10, the multiple step-by-step distal movement amounts corresponding to the same tooth are different, that is, for the same tooth in multiple rounds of distal movement cycles, the same or different step-by-step distal movement amounts can be applied, which can be determined according to the actual situation specifically.

[0091] Optionally, the number of invisible orthodontic appliances included in two sets of invisible orthodontic appliance groups 10 in the multiple sets of invisible orthodontic appliance groups 10 is the same, or, the number of invisible orthodontic appliances included in two sets of invisible orthodontic appliance groups 10 in the multiple sets of invisible orthodontic appliance groups 10 is different, which can be determined according to the actual situation specifically.

[0092] Optionally, multiple teeth arranged from distal to mesial have a target distal movement amount.

[0093] The target distal movement amount is defined as the total distal movement amount of multiple teeth from the initial state to the target state, and the target distal movement amount is divided into multiple step-by-step distal movement amounts corresponding to multiple sets of invisible orthodontic appliance groups 10 according to the number of steps.

[0094] In the same invisible orthodontic appliance group 10, the multiple invisible orthodontic appliances can all apply this step-by-step distal movement amount, or, adjust this step-by-step distal movement amount for each tooth.

[0095] The number of steps actually corresponds to the number of distal movement cycles and the number of sets of invisible orthodontic appliance groups 10. For example, when the number of steps is 2, the invisible orthodontic appliance system 100 includes two sets of invisible orthodontic appliance groups 10, and the entire orthodontic process includes two rounds of distal movement cycles.

[0096] For the convenience of design, the amount that multiple teeth need to move as a whole can be used as the target distal movement amount, but not limited thereto. For example, the target distal movement amount can also be designed separately for each tooth, and then this target distal movement amount is divided into multiple step-by-step distal movement amounts according to the number of steps and applied to this tooth in multiple rounds of distal movement cycles.

[0097] Optionally, when the target distal movement amount is greater than 2 mm and less than 4 mm, the number of steps is 2, and when the target distal movement amount is greater than or equal to 4 mm, the number of steps is 3 or 4.

[0098] When the target distal movement amount is large, the number of distal movement cycles can be appropriately increased. At this time, the step-by-step distal movement amount of each round of distal movement cycle is relatively small, avoiding the anchorage pressure caused by too large a step-by-step distal movement amount.

[0099] Combined with Figures 4 to 7c , the orthodontic process of an embodiment of the present invention will be described in detail.

[0100] Taking the invisible orthodontic appliance system 100 including K sets of invisible orthodontic appliance groups 10 as an example for illustration.

[0101] The invisible orthodontic appliance system 100 includes a first group of invisible orthodontic appliance groups 10, a second group of invisible orthodontic appliance groups 10a to a Kth group of invisible orthodontic appliance groups 10k, where K ≤ 4.

[0102] The first group of invisible orthodontic appliance groups 10 includes a first invisible orthodontic appliance 11, a second invisible orthodontic appliance 12, a third invisible orthodontic appliance 13, a fourth invisible orthodontic appliance 14, a fifth invisible orthodontic appliance 15, a sixth invisible orthodontic appliance 16, and a seventh invisible orthodontic appliance 17.

[0103] The second group of invisible orthodontic appliance groups 10a also includes seven invisible orthodontic appliances 11a, 12a, 13a, 14a, 15a, 16a, 17a, and so on. The Kth group of invisible orthodontic appliance groups 10k also includes seven invisible orthodontic appliances 11k, 12k, 13k, 14k, 15k, 16k, 17k.

[0104] In this specific embodiment, it is taken as an example that each group of invisible orthodontic appliance groups 10 includes seven invisible orthodontic appliances, but it is not limited thereto. The number of invisible orthodontic appliances included in each group of invisible orthodontic appliance groups 10 can be adjusted according to the actual situation.

[0105] Next, taking Figure 2 the orthodontic treatment process of multiple teeth numbered 7, 6, 5, 4, 3, 2, 1 in the first area A1 of the maxillary and mandibular dentition as an example for illustration, that is, only the designed amount of the invisible orthodontic appliance corresponding to the first area A1 is shown. In actual application, there is also a designed amount for the invisible orthodontic appliance corresponding to the second area A2.

[0106] Assume that the target distal movement amount of the first area A1 is 6 mm and the number of steps is 3, that is, K = 3, and the entire orthodontic treatment process includes three rounds of distal movement cycles.

[0107] The invisible orthodontic appliance system 100 includes three groups of invisible orthodontic appliance groups 10. The target distal movement amount is divided into three step-by-step distal movement amounts corresponding to the three groups of invisible orthodontic appliance groups 10. Assume that the step-by-step distal movement amount of the first group of invisible orthodontic appliance groups 10 is 2 mm, the step-by-step distal movement amount of the second group of invisible orthodontic appliance groups 10a is 2 mm, and the step-by-step distal movement amount of the third group of invisible orthodontic appliance groups 10k is 2 mm.

[0108] Combined with Figure 5 , a cycle schematic diagram of three rounds of distal movement cycles is shown. The abscissa indicates the progressive orthodontic steps, the ordinate indicates the numbers of multiple teeth, and multiple thick solid lines in the schematic diagram indicate the step-by-step distal movement amounts. The longer the thick solid line, the greater the step-by-step distal movement amount.

[0109] Taking the step-by-step distal movement amounts of the first group of invisible orthodontic appliances 10 as an example for illustration, the first invisible orthodontic appliance 11 has a first step-by-step distal movement amount D1 corresponding to the 7th tooth, the second invisible orthodontic appliance 12 has a second step-by-step distal movement amount D2 corresponding to the 6th tooth, the third invisible orthodontic appliance 13 has a third step-by-step distal movement amount D3 corresponding to the 5th tooth, the fourth invisible orthodontic appliance 14 has a fourth step-by-step distal movement amount D4 corresponding to the 4th tooth, the fifth invisible orthodontic appliance 15 has a fifth step-by-step distal movement amount corresponding to the 3rd tooth, the sixth invisible orthodontic appliance 16 has a sixth step-by-step distal movement amount D6 corresponding to the 2nd tooth, and the seventh invisible orthodontic appliance 17 has a seventh step-by-step distal movement amount D7 corresponding to the 1st tooth.

[0110] Assume that the first step-by-step distal movement amount D1, the second step-by-step distal movement amount D2, the third step-by-step distal movement amount D3, the fourth step-by-step distal movement amount D4, the fifth step-by-step distal movement amount D5, the sixth step-by-step distal movement amount, and the seventh step-by-step distal movement amount D7 are equal, and all are 2 mm.

[0111] In the Jth orthodontic step, wearing the first invisible orthodontic appliance 11 realizes the distal movement of the 7th tooth. At this time, the 1st - 6th teeth do not move distally. After the Jth orthodontic step ends, a first gap is formed between the 7th tooth and the 6th tooth, and this first gap provides space for the distal movement of the 6th tooth.

[0112] In practical applications, affected by the distal movement achievement rate, when the first step-by-step distal movement amount D1 is 2 mm, the actual distal movement amount of the 7th tooth is less than 2 mm. For example, when the distal movement achievement rate is 60%, the actual distal movement amount of the 7th tooth is 1.2 mm.

[0113] Since the first step-by-step distal movement amount D1 at this time is less than the target distal movement amount, the resistance borne by the anterior teeth (the 1st - 3rd teeth) is relatively small, and the anterior teeth are not prone to excessive labial inclination. Similarly, in the following several orthodontic steps, the resistance borne by the anterior teeth is also relatively small.

[0114] The first invisible orthodontic appliance 11 can be designed with a rotation amount corresponding to the 5th tooth at the same time. When wearing the first invisible orthodontic appliance 11, the distal movement of the 7th tooth and the rotation of the 5th tooth are realized simultaneously, but this is not limited thereto. Appropriate design amounts can be selected for appropriate teeth according to the actual situation. The following other invisible orthodontic appliances can also be designed with other design amounts, which will not be elaborated below.

[0115] In the (J + 1)th orthodontic step, wearing the second invisible orthodontic appliance 12 realizes the distal movement of the 6th tooth. At this time, the 1st - 5th teeth do not move distally. After the Jth orthodontic step ends, a second gap P2 (see Figure 6a ) is formed between the 6th tooth and the 5th tooth, and this second gap P2 provides space for the distal movement of the 5th tooth.

[0116] When designing the second invisible aligner 12, no step-by-step distal movement amount was designed for the 7th tooth. However, since the distal movement achievement rate of the 7th tooth in the Jth orthodontic step was not 100%, when wearing the second invisible aligner 12 in the (J + 1)th orthodontic step, the second invisible aligner 12 would still apply a distal movement force to the 7th tooth. That is, at this time, the distal movement of both the 7th tooth and the 6th tooth was achieved simultaneously. The (J + 1)th orthodontic step realized the continuous expression of the 7th tooth, thereby improving the distal movement expression rate of the 7th tooth.

[0117] At the same time, when the achievement rate was 60%, the actual distal movement amount of the 6th tooth was 1.2 mm.

[0118] And so on, in the (J + 2)th orthodontic step, wearing the third invisible aligner 13 achieved the distal movement of the 5th tooth. Assuming that the 7th tooth had been fully expressed at this time, the (J + 2)th orthodontic step actually achieved the distal movement of both the 6th tooth and the 5th tooth simultaneously.

[0119] In the (J + 3)th orthodontic step, wearing the fourth invisible aligner 14 achieved the distal movement of the 4th tooth. Assuming that the 6th tooth had been fully expressed at this time, the (J + 3)th orthodontic step actually achieved the distal movement of both the 5th tooth and the 4th tooth simultaneously. A fourth space P4 was formed between the 4th tooth and the 3rd tooth (see Figure 6b ), and this fourth space P4 provided space for the lingual movement and distal movement of the 3rd tooth.

[0120] In the (J + 4)th, (J + 5)th, and (J + 6)th orthodontic steps, the orthodontics of the anterior teeth was involved. The anterior teeth generally involved the lingual movement process, and the anterior teeth moved distally during the lingual movement process. That is, by wearing the fifth invisible aligner 15, the sixth invisible aligner 16, and the seventh invisible aligner 17 in sequence, the lingual movement process of the 1st - 3rd teeth was achieved. Therefore, starting from the (J + 4)th orthodontic step, the patient could see the orthodontic effect of the anterior teeth lingual movement, which could greatly improve the patient experience and wearing compliance. Moreover, the doctor or the patient could observe the orthodontic effect starting from the (J + 4)th orthodontic step and could optimize or terminate the orthodontic plan in a timely manner.

[0121] See Figure 6c , which shows the dental arch after wearing the seventh invisible aligner 17 was completed, that is, the first round of distal movement cycle was completed, and the anterior teeth had been significantly lingually moved.

[0122] Combined with Figures 7a to 7c , it shows the dental arch after wearing multiple invisible aligners in the second group of invisible aligner sets 10a in sequence during the second round of distal movement cycle.

[0123] Combined with Figure 7a , in the (J + 7)th and (J + 8)th orthodontic steps, wearing the invisible aligners 11a and 12a in sequence achieved the distal movement of the 7th tooth and the 6th tooth.

[0124] Combined with Figure 7bIn the (J + 9)-th and (J + 10)-th orthodontic steps, the invisible aligners 13a and 14a are worn in sequence to achieve the distal movement of the No. 5 tooth and the No. 4 tooth.

[0125] Combined with Figure 7c , in the (J + 11)-th, (J + 12)-th, and (J + 13)-th orthodontic steps, the invisible aligners 15a, 16a, and 17a are worn in sequence to achieve the retraction of the No. 3 tooth, the No. 2 tooth, and the No. 1 tooth. Figure 7c Schematically shows the dental arch after wearing the invisible aligner 17a, that is, the second distal movement cycle is completed, and the anterior teeth have been further retracted.

[0126] The orthodontic process of the third group of invisible aligner group 10k can refer to the foregoing description and will not be elaborated here.

[0127] The orthodontic process of multiple teeth numbered 7', 6', 5', 4', 3', 2', 1' in the second dental arch area A2 can refer to the orthodontic process of multiple teeth numbered 7, 6, 5, 4, 3, 2, 1 in the first dental arch area A1, that is, wearing the foregoing three groups of invisible aligner groups 10 can simultaneously achieve the orthodontics of multiple teeth in the second area A2.

[0128] Optionally, combined with Figure 8 , the target distal movement amount includes a first target distal movement amount corresponding to multiple teeth in the first area A1 and a second target distal movement amount corresponding to multiple teeth in the second area A2, and the number of steps of the first target distal movement amount is the same as that of the second target distal movement amount.

[0129] In practical applications, when the first area A1 and the second area A2 of the dental arch are different, the first target distal movement amount and the second target distal movement amount may also be different. At this time, the number of steps of the two is still kept the same.

[0130] When the number of steps is the same, the gap between the step-by-step distal movement amount in the first area A1 and the step-by-step distal movement amount in the second area A2 in a certain distal movement cycle can be effectively reduced. After the distal movement cycle ends, the gap P between the central incisors in the first area A1 and the central incisors in the second area A2 is relatively small, and thus the unnecessary mesial movement of the central incisors in the subsequent distal movement cycles can be effectively avoided.

[0131] Optionally, the number of steps can be determined by the target distal movement amount with a larger value, and the first target distal movement amount is divided into equal multiple first step-by-step distal movement amounts, and the second target distal movement amount is divided into equal multiple second step-by-step distal movement amounts.

[0132] For example, when the first target distal movement amount is 4 mm and the second target distal movement amount is 3 mm, the number of steps for both is 2. In the first round of distal movement cycle, the step-by-step distal movement amount of the first region A1 is 2 mm, and the step-by-step distal movement amount of the second region A2 is 1.5 mm. In the second round of distal movement cycle, the step-by-step distal movement amount of the first region A1 is 2 mm, and the step-by-step distal movement amount of the second region A2 is 1.5 mm.

[0133] Optionally, in combination with Figure 9 , the target distal movement amount includes a third target distal movement amount for multiple teeth corresponding to the first region A1 and a fourth target distal movement amount for multiple teeth corresponding to the third region A3. One of the first region A1 and the third region A3 corresponds to the maxillary teeth, and the other corresponds to the mandibular teeth, and there is an occlusion relationship between the first region A1 and the third region A3.

[0134] It should be noted that when simultaneous orthodontics of maxillary teeth and mandibular teeth is involved, each orthodontic step includes two invisible orthodontic appliances corresponding to maxillary teeth and mandibular teeth respectively.

[0135] "There is an occlusion relationship between the first region A1 and the third region A3" means that when the upper and lower jaws are in the occlusal state, multiple teeth in the first region A1 and multiple teeth in the third region A3 are arranged opposite to each other.

[0136] Taking the first region A1 corresponding to maxillary teeth and the third region A3 corresponding to mandibular teeth as an example, and when the upper and lower jaws are in the occlusal state, there is a deep overbite problem between the anterior teeth of the third region A3 and the anterior teeth of the first region A1.

[0137] Assume that the third target distal movement amount is greater than the fourth target distal movement amount. The third target distal movement amount is divided into multiple third sub-distal movement amounts. When the fourth target distal movement amount is not greater than the third sub-distal movement amount in the first group of invisible orthodontic appliance groups, the fourth target distal movement amount is divided into one fourth sub-distal movement amount and applied to the first group of invisible orthodontic appliance groups; when the fourth target distal movement amount is greater than the third sub-distal movement amount in the first group of invisible orthodontic appliance groups, the fourth target distal movement amount is divided into multiple fourth sub-distal movement amounts, and at least the third sub-distal movement amount in the first group of invisible orthodontic appliance groups is equal to the fourth sub-distal movement amount.

[0138] In other words, actually, the larger of the third target distal movement amount and the fourth target distal movement amount is divided into multiple sub-distal movement amounts, and the smaller one sequentially matches multiple sub-distal movement amounts.

[0139] For example, when the third target distal movement amount is 4 mm and the fourth target distal movement amount is 2 mm, the third target distal movement amount is divided into two third sub-distal movement amounts both of 2 mm, and the fourth target distal movement amount is divided into one fourth sub-distal movement amount of 2 mm.

[0140] When the third target distal movement amount is 4 mm and the fourth target distal movement amount is 3 mm, the third target distal movement amount is divided into two third sub-distal movement amounts both of 2 mm, and the fourth target distal movement amount is divided into two fourth sub-distal movement amounts of 2 mm and 1 mm in sequence. That is, the fourth target distal movement amount first divides out the fourth sub-distal movement amount that matches the third sub-distal movement amount in the first group of invisible aligner groups, and the extra fourth target distal movement amount is then allocated to the second group of invisible aligner groups.

[0141] Combined with Figure 9 , when wearing the first group of invisible aligner groups, the first area A1 mainly needs to achieve the retraction of the anterior teeth in the distal movement cycle, and the third area A3 mainly needs to achieve the alignment and intrusion of the anterior teeth in the distal movement cycle. When the anterior teeth in the third area A3 generate sufficient alignment and intrusion amounts, it can provide sufficient space for the retraction of the anterior teeth in the first area A1. Otherwise, the position of the anterior teeth in the third area A3 will hinder the retraction process of the anterior teeth in the first area A1.

[0142] In addition, when wearing the first group of invisible aligner groups, if the gap between the third sub-distal movement amount and the fourth sub-distal movement amount is too large, a large occlusal difference will be caused after wearing is completed.

[0143] Combined with Figure 10a , when wearing is completed for the first group of invisible aligner groups, if the fourth sub-distal movement amount is relatively small, the anterior teeth in the third area A3 tilt outwards and protrude upwards, and the gap between the cusp R' of the anterior teeth and the anterior teeth in the first area A1 is small, and the retraction of the anterior teeth in the first area A1 is blocked.

[0144] Combined with Figure 10b , when wearing is completed for the first group of invisible aligner groups, if the fourth sub-distal movement amount is relatively large, the anterior teeth in the third area A3 tilt outwards and protrude upwards to a relatively small extent, and the gap between the cusp R of the anterior teeth and the anterior teeth in the first area A1 is large, and the retraction effect of the anterior teeth in the first area A1 is better.

[0145] In this embodiment, the fourth target distal movement amount is set to preferentially match the third sub-distal movement amount in the first group of invisible aligner groups, which can ensure the retraction effect of the anterior teeth and avoid too large an occlusal difference.

[0146] In summary, when the present utility model is applied to the anterior tooth retraction scenario, a certain degree of anterior tooth retraction can be achieved in the first round of distal movement cycle, and the patient can see the orthodontic effect earlier, which can greatly improve the patient experience and wearing compliance.

[0147] The orthodontic effect of the present utility model can be observed after the first round of distal movement cycle (or the first few rounds of distal movement cycles), and the orthodontic plan can be optimized in time or terminated in advance.

[0148] In the present utility model, the tooth distal movement scheme is divided into multiple rounds of distal movement cycles. In each round of distal movement cycle, the step-by-step distal movement amount corresponding to each tooth is less than the target distal movement amount of that tooth (i.e., the distal movement amount when the tooth reaches the final target state). When the tooth is a posterior tooth, the step-by-step distal movement amount corresponding to the posterior tooth is small, and the anchorage force borne by the anterior teeth is relatively small, so the anterior teeth are not likely to show excessive labial inclination.

[0149] The tooth arrangement scheme in each round of distal movement cycle of the present utility model is similar to the tooth arrangement scheme in the prior art, which can greatly reduce the design difficulty and design duration, and the orthodontic effect is also relatively controllable or predictable.

[0150] It should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0151] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present utility model, and they are not used to limit the protection scope of the present utility model. Any equivalent embodiments or changes made without departing from the technical spirit of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An invisible orthodontic appliance system, characterized in that, It includes multiple groups of invisible orthodontic appliances, which are configured to be worn sequentially by group. Each group of invisible orthodontic appliances includes multiple invisible orthodontic appliances corresponding to multiple orthodontic steps respectively. The multiple invisible orthodontic appliances in each group of invisible orthodontic appliances are configured as follows: at the Nth orthodontic step, the Mth tooth starts to be distalized, and at the N+N1th orthodontic step, the M1th tooth starts to be distalized. Wherein, N and N1 are positive integers, and the Mth tooth and the M1th tooth are arranged in the direction from distal to mesial in the first area, and the first area is the left area or the right area of the dental arch.

2. The invisible orthodontic appliance system according to claim 1, wherein The multiple invisible orthodontic appliances in each group of invisible orthodontic appliances are configured as follows: at the N+N2th orthodontic step, the M2th tooth starts to be distalized, where N2 is a positive integer and N2 > N1, and the Mth tooth, the M1th tooth, and the M2th tooth are arranged in the direction from distal to mesial in the first area.

3. The invisible orthodontic appliance system according to claim 1, wherein The M1th tooth is the anterior tooth in the first area. After the N+N1th orthodontic step is completed, the next group of invisible orthodontic appliances starts to be worn.

4. The invisible orthodontic appliance system according to claim 1, wherein, The multiple invisible orthodontic appliances in each group of invisible orthodontic appliances are configured as follows: at the Nth orthodontic step, the Mth tooth and the M'th tooth are simultaneously distalized, and the M'th tooth is located in the second area. One of the first area and the second area is the left area of the dental arch, and the other is the right area of the dental arch. The numbers of the Mth tooth and the M'th tooth correspond to each other in the numbering system.

5. The invisible orthodontic appliance system according to claim 1, characterized in that, The multiple invisible orthodontic appliances in each group of invisible orthodontic appliances are configured as follows: at the Nth orthodontic step, the Mth tooth and the Lth tooth are simultaneously distalized, and the Mth tooth and the Lth tooth are adjacent teeth in the first area, and / or at the N+N1th orthodontic step, the M1th tooth and the L1th tooth are simultaneously distalized, and the M1th tooth and the L1th tooth are adjacent teeth in the first area.

6. The invisible orthodontic appliance system according to claim 1, wherein The multiple invisible orthodontic appliances in each group of invisible orthodontic appliances are configured as follows: at the N+1th orthodontic step, the distalization of the Mth tooth continues, N1 > 1, and / or at the N+N1+1th orthodontic step, the distalization of the M1th tooth continues.

7. The invisible orthodontic appliance system according to claim 1, characterized in that During the whole orthodontic process, the number of groups of the invisible orthodontic appliances is not more than 4.

8. The invisible orthodontic appliance system according to claim 1, wherein, The invisible orthodontic appliance corresponding to the Nth orthodontic step has at least a first stepwise distalization amount for distalizing the Mth tooth, and the invisible orthodontic appliance corresponding to the N+N1th orthodontic step has at least a second stepwise distalization amount for distalizing the M1th tooth.

9. The invisible orthodontic appliance system according to claim 8, characterized in that, The first stepwise distalization amount is substantially the same as the second stepwise distalization amount.

10. The invisible orthodontic appliance system according to claim 8, characterized in that, The invisible orthodontic appliance corresponding to the Nth orthodontic step also has a third stepwise distalization amount for distalizing the Lth tooth, and the Mth tooth and the Lth tooth are adjacent teeth in the first area, and / or the invisible orthodontic appliance corresponding to the N+N1th orthodontic step also has a fourth stepwise distalization amount for distalizing the L1th tooth, and the M1th tooth and the L1th tooth are adjacent teeth in the first area.

11. The invisible orthodontic appliance system according to claim 10, wherein The third stepwise distalization amount is substantially the same as the first stepwise distalization amount, and the fourth stepwise distalization amount is substantially the same as the second stepwise distalization amount.

12. The invisible orthodontic appliance system according to claim 8, wherein The invisible orthodontic appliance corresponding to the N+1th orthodontic step has a fifth stepwise distalization amount for distalizing the Mth tooth, N1 > 1, and / or the invisible orthodontic appliance corresponding to the N+N1+1th orthodontic step has a sixth stepwise distalization amount for distalizing the M1th tooth.

13. The invisible orthodontic appliance system according to claim 12, characterized in that, The fifth stepwise distalization amount is not more than the first stepwise distalization amount, and the sixth stepwise distalization amount is not more than the second stepwise distalization amount.

14. The invisible orthodontic appliance system according to claim 1, characterized in that, At least one set of invisible orthodontic appliances is configured such that the invisible orthodontic appliance corresponding to a certain orthodontic step has a stepwise distal movement amount for a certain tooth corresponding to the first region, and the stepwise distal movement amounts of multiple orthodontic steps sequentially move multiple teeth distally, and the multiple teeth are multiple teeth arranged in sequence from distal to mesial in the first region.

15. The invisible orthodontic appliance system according to claim 14, wherein, The multiple teeth are multiple teeth numbered 7, 6, 5, 4, 3, 2, 1 in the first region, and the stepwise distal movement amount of each invisible orthodontic appliance corresponding to the other teeth in the first region is zero.

16. The invisible orthodontic appliance system according to claim 1, wherein, A certain invisible orthodontic appliance simultaneously has a stepwise distal movement amount corresponding to a certain tooth in the first region and other design amounts corresponding to the other teeth in the first region.

17. The invisible orthodontic appliance system according to any one of claims 1 to 16, characterized in that, The multiple teeth arranged in sequence from distal to mesial have a target distal movement amount, and the target distal movement amount is divided into multiple stepwise distal movement amounts corresponding to multiple sets of invisible orthodontic appliances according to the number of steps.

18. The invisible orthodontic appliance system according to claim 17, wherein, When the target distal movement amount is greater than 2 mm and less than 4 mm, the number of steps is 2; when the target distal movement amount is greater than or equal to 4 mm, the number of steps is 3 or 4.

19. The invisible orthodontic appliance system according to claim 17, characterized in that, The target distal movement amount includes a first target distal movement amount for multiple teeth corresponding to the first region and a second target distal movement amount for multiple teeth corresponding to the second region. The number of steps of the first target distal movement amount is the same as that of the second target distal movement amount. One of the first region and the second region is the left region of the dental arch, and the other is the right region of the dental arch.

20. The invisible orthodontic appliance system according to claim 17, characterized in that, The target distal movement amount includes a third target distal movement amount for multiple teeth corresponding to the first region and a fourth target distal movement amount for multiple teeth corresponding to the third region. One of the first region and the third region corresponds to the maxillary teeth, and the other corresponds to the mandibular teeth, and there is an occlusal relationship between the first region and the third region. Among them, the third target distal movement amount is greater than the fourth target distal movement amount. The third target distal movement amount is divided into multiple third sub-distal movement amounts. When the fourth target distal movement amount is not greater than the third sub-distal movement amount in the first set of invisible orthodontic appliance groups, the fourth target distal movement amount is divided into one fourth sub-distal movement amount and applied to the first set of invisible orthodontic appliance groups; when the fourth target distal movement amount is greater than the third stepwise distal movement amount in the first set of invisible orthodontic appliance groups, the fourth target distal movement amount is divided into multiple fourth sub-distal movement amounts, and at least the third sub-distal movement amount in the first set of invisible orthodontic appliance groups is equal to the fourth sub-distal movement amount.

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