Evaluation method of tooth correction and related method, equipment and medium thereof

Abstract

The embodiment of the invention relates to the technical field of tooth correction, in particular to a tooth correction evaluation method and a related method, equipment and medium thereof. The tooth correction evaluation method comprises the following steps: determining correction weight coefficients of a target tooth in different moving modes, wherein the correction weight coefficients are used for representing the relative difficulty degree of correction of the target tooth in different moving modes; determining quantization parameters of the target tooth in different movement modes, wherein the quantization parameters are used for representing the proximity degree of the correction limit state of the target tooth in the corresponding movement mode; and according to the correction weight coefficient and the quantization parameter, evaluating the correction difficulty degree of the target tooth in each movement mode. According to the method, the difficulty degree of tooth correction can be better evaluated at least, so that the tooth attachment can be better determined based on the evaluation result to better assist a correction appliance in correction, and a better correction effect is achieved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of dental orthodontics, and in particular to a method for evaluating dental orthodontics and related methods, devices, and media. Background Art

[0002] Tooth attachments are designed to assist braces in achieving better correction effects. During correction, how to choose attachments that match the braces will affect the final correction effect. There are currently two main ways to select tooth attachments: one is to manually select tooth attachments based on experience; the other is to automatically select one or more tooth attachments based on the correction goals of a single tooth under different movement modes based on relevant software.

[0003] However, manual selection relies heavily on experience to evaluate the difficulty of tooth correction, which is not objective, and it is easy to cause the shape of the selected tooth attachment to be unreasonable and time-consuming; based on software selection, it usually only considers the correction goals under different tooth movement methods, ignoring the movement difficulty of different tooth movement methods, and the evaluation of the difficulty of tooth correction is not comprehensive and accurate, which easily leads to the shape of the selected tooth attachment is often not the most reasonable. As a result, the tooth attachments selected by the above methods cannot well assist the orthodontic appliance for correction. Summary of the invention

[0004] The embodiments of the present application provide a method for evaluating tooth orthodontics and related methods, devices, and media, which are conducive to better evaluating the difficulty of tooth orthodontics, so that tooth accessories can be better determined based on the evaluation results to better assist the orthodontic appliance in correction and achieve better correction results.

[0005] According to some embodiments of the present application, on the one hand, the embodiments of the present application provide a method for evaluating tooth correction, including: determining a correction weight coefficient of a target tooth in different movement modes, the correction weight coefficient being used to characterize the relative difficulty of achieving correction of the target tooth in different movement modes; determining a quantitative parameter of the target tooth in different movement modes, the quantitative parameter being used to characterize the degree of proximity of the correction of the target tooth in the corresponding movement mode to a limit state; and evaluating the difficulty of correction of the target tooth in each movement mode based on the correction weight coefficient and the quantitative parameter.

[0006] In some embodiments, determining the quantitative parameters of the target tooth in different movement modes includes: normalizing the target correction distance according to the reference correction distance of the target tooth in each movement mode to obtain the quantitative parameter, and the reference correction distance is the maximum correction distance of the target tooth under the extreme state in the corresponding movement mode.

[0007] In some embodiments, the target correction distance is normalized according to the reference correction distance of the target tooth in each movement mode, including: normalizing the target correction distance according to the following expression: Pi = Mi / Ni, wherein Pi is the normalized result of the target correction distance in the i-th movement mode, Mi is the target correction distance in the i-th movement mode, and Ni is the reference correction distance in the i-th movement mode.

[0008] In some embodiments, the correction weight coefficient is obtained based on the statistical expression rate of the tooth at the tooth position where the target tooth is located in each of the movement modes.

[0009] In some embodiments, the expression rate is obtained by statistics of one or a combination of the following information: clinical data, literature research data, and simulation result data of finite element model simulation of long-term tooth movement.

[0010] In some embodiments, the correction weight coefficients on the movement modes satisfy the following constraints: i=1,2,3,...T-1; where T is the total number of movement modes, is the correction weight coefficient corresponding to the target tooth in the i-th movement mode, and Ai is the expression rate calculated based on statistics of the tooth at the tooth position where the target tooth is located in the i-th movement mode.

[0011] In some embodiments, the correction weight coefficient and the quantitative parameter are used to evaluate the correction difficulty of the target tooth in each of the movement modes, including: evaluating the correction difficulty of the target tooth in each of the movement modes according to the quantitative parameter to obtain an initial evaluation score; and determining the evaluation score of the correction difficulty of the target tooth in the corresponding movement mode using the correction weight coefficient as the weight of the corresponding initial evaluation score.

[0012] In some embodiments, the evaluation of the difficulty of correction of the target tooth in each of the movement modes is performed based on the quantitative parameter to obtain an initial evaluation score, including: obtaining the initial evaluation score of the target tooth in each of the movement modes through the following expression: Xi=Si; determining the evaluation score of the difficulty of correction of the target tooth in the corresponding movement mode with the correction weight coefficient as the weight of the corresponding initial evaluation score, including: determining the evaluation score of the target tooth in each of the movement modes through the following expression: Ri=Xi*Yi, wherein Xi is the initial evaluation score of the target tooth in the i-th movement mode, Ri is the evaluation score of the target tooth in the i-th movement mode, Si is the quantitative parameter of the target tooth in the i-th movement mode, and Yi is the correction weight coefficient of the target tooth in the i-th movement mode.

[0013] In some embodiments, the movement mode includes at least two of the following directions: the positive direction of the long axis direction of the tooth, the negative direction of the long axis direction of the tooth, the positive direction of the labiolingual direction, the negative direction of the labiolingual direction, the positive direction of the mesiodistal direction, the negative direction of the mesiodistal direction, the rotation direction around the long axis direction of the tooth to the mesial, the rotation direction around the long axis direction of the tooth to the distal, the rotation direction around the labiolingual direction to the mesial, the rotation direction around the labiolingual direction to the distal, the rotation direction around the mesiodistal direction to the labial side, and the rotation direction around the mesiodistal direction to the lingual side.

[0014] According to some embodiments of the present application, on the other hand, the embodiments of the present application further provide a method for determining a tooth accessory, comprising: evaluating the degree of difficulty of correction of the target tooth in each movement mode according to the tooth correction evaluation method as described in any of the above embodiments, so as to determine the target movement mode to which the accessory needs to be added from each of the movement modes according to the evaluation result; and determining the target tooth accessory according to the target movement mode.

[0015] In some embodiments, after evaluating the difficulty of correction of the target tooth in each of the movement modes according to the correction weight coefficient and the quantitative parameter, the method further includes: determining the most difficult movement mode of the target tooth as the target movement mode according to the evaluation result.

[0016] In some embodiments, determining the target tooth attachment according to the target movement mode includes: selecting, from tooth attachments of different shapes, a tooth attachment that provides the best correction effect in the target movement mode after the force application surface and the orthodontic device work together as the target tooth attachment.

[0017] According to some embodiments of the present application, on the other hand, the embodiments of the present application further provide a method for manufacturing a dental appliance, comprising: determining a target dental accessory and setting the target dental accessory on a target tooth according to the method for determining a dental accessory as described in any of the above embodiments to obtain a target dental model; and generating a shell-shaped dental appliance according to the target dental model.

[0018] In some embodiments, generating a shell-shaped dental appliance according to the target dental model includes: manufacturing a positive mold of the appliance according to the target dental model; obtaining a shell-shaped dental appliance containing a tooth shape by hot pressing on the positive mold of the appliance; and cutting along the gum line or adjacent to the gum line on the shell-shaped dental appliance containing a tooth shape to obtain a shell-shaped dental appliance capable of accommodating the teeth.

[0019] In some embodiments, generating a shell-shaped dental appliance according to the target dental model includes: generating a digital appliance model matching the target dental model; and manufacturing the shell-shaped dental appliance through an additive manufacturing process according to data information corresponding to the digital appliance model.

[0020] According to some embodiments of the present application, on the other hand, the embodiments of the present application further provide an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for evaluating dental orthodontics as described in any of the above embodiments, or execute the method for determining dental accessories as described in any of the above embodiments, or execute the method for manufacturing a dental appliance as described in any of the above embodiments.

[0021] According to some embodiments of the present application, on the other hand, the embodiments of the present application further provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for evaluating dental orthodontics as described in any of the above embodiments, or implements the method for determining tooth accessories as described in any of the above embodiments, or implements the method for manufacturing a dental appliance as described in any of the above embodiments.

[0022] The technical solution provided in the embodiment of the present application has at least the following advantages:

[0023] The correction weight coefficient and quantitative parameters of the target teeth in different movement modes are determined respectively, so that the correction difficulty and correction amount of the target teeth in different movement modes can be quantified. Therefore, according to the correction weight coefficient and quantitative parameters, the correction difficulty of the target teeth in each movement mode is evaluated, and a more reasonable and accurate evaluation result with unified standard, objective, quantifiable comparison can be automatically obtained, that is, a better evaluation of the difficulty of tooth correction can be achieved. Therefore, based on the evaluation results, the tooth attachment can be better determined to better assist the correction device in correction and achieve a better correction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0025] Figure 1 is a flow chart of a method for evaluating dental orthodontics provided in one embodiment of the present application;

[0026] Figure 2 It is a schematic diagram of the long axis direction of the tooth, the labiolingual direction and the mesiodistal direction involved in the evaluation method for orthodontic treatment provided in one embodiment of the present application;

[0027] Figure 3 is a schematic diagram of different movement modes involved in a method for evaluating orthodontic treatment provided in an embodiment of the present application;

[0028] Figure 4 is a flow chart of a method for determining tooth attachments provided in an embodiment of the present application;

[0029] Figure 5 is a schematic diagram of the structures of different tooth attachments involved in the method for determining a tooth attachment provided in an embodiment of the present application;

[0030] Figure 6 is a flow chart of a method for manufacturing a dental appliance provided in one embodiment of the present application;

[0031] Figure 7 It is a schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0032] As can be seen from the background technology, the current evaluation of dental orthodontics has the problem of inaccuracy.

[0033] After analysis, it was found that the reason for the above problems is at least that: in the process of tooth correction, the correction difficulty of teeth under different movement modes is different, so the expression rate of different movement modes in the final correction result is different. For example, when the correction goal is to move the tooth from the labial side to the lingual side by 1mm and rotate 5° from the labial side to the lingual side around the mesiodistal direction, although the goal is to translate the tooth from the labial side to the lingual side by 1mm and rotate 5° from the labial side to the lingual side around the mesiodistal direction, the final correction result may be a translation of 0.9mm from the labial side to the lingual side and a rotation of 3° from the labial side to the lingual side around the mesiodistal direction. At this time, the expression rate of the tooth translation from the labial side to the lingual side is higher than the expression rate of the tooth rotation from the labial side to the lingual side around the mesiodistal direction. It is understandable that in order to better achieve the correction goal, the most difficult correction to achieve should be the one that needs the most assistance from tooth accessories. Therefore, when evaluating dental correction, if the above influences are not fully considered, the evaluation will be inaccurate. As a result, the dental accessories selected based on the evaluation results may not be able to provide the best auxiliary effect in the most difficult correction, and cannot fully play the auxiliary role of correction, making it difficult to achieve a good correction effect.

[0034] In order to solve the above technical problems, the embodiment of the present application provides a method for evaluating tooth correction and its related methods, equipment, and medium. When determining the target tooth attachments that need to be set for the target teeth, the difficulty evaluation of the correction of the target teeth under different movement modes is also considered, so that based on the evaluation results, a more accurate and reasonable target movement mode can be determined from different movement modes, so that a more accurate and reasonable target tooth attachment can be further determined, providing better assistance for the appliance and achieving better correction effect. Among them, when evaluating the difficulty evaluation of the correction of the target teeth under different movement modes, the correction weight coefficient and quantitative parameter evaluation obtained by quantifying the correction difficulty and correction amount of the target teeth under different movement modes are more unified, objective, and quantifiable, which is conducive to improving the accuracy of the evaluation, so as to improve the correction effect achieved by the selected target tooth attachment auxiliary appliance.

[0035] In order 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 embodiments of the present application, many technical details are provided 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 be implemented.

[0036] The division of the following embodiments is for the convenience of description and shall not constitute any limitation on the specific implementation of the present application. The embodiments may be combined with each other and referenced to each other without contradiction.

[0037] The present application provides a method for evaluating dental orthodontics, which is applied to electronic devices such as computers, servers, mobile phones, etc., and will not be described in detail here. In some embodiments, the process is as follows: Figure 1 As shown, at least the following steps are included:

[0038] Step 101, determining a correction weight coefficient of a target tooth in different movement modes, where the correction weight coefficient is used to characterize the relative difficulty of achieving correction of the target tooth in different movement modes.

[0039] In this embodiment, the target tooth can be any tooth model that needs to be equipped with tooth accessories to cooperate with the orthodontic appliance to achieve correction. The movement mode refers to the different dimensions that the target tooth needs to achieve in order to achieve the correction goal. For example, when the correction goal is that the tooth moves 1mm from the labial side to the lingual side and rotates 5° from the labial side around the mesiodistal direction to the lingual side, the corresponding movement mode may include two different dimensions, namely, translation from the labial side to the lingual side and rotation from the labial side around the mesiodistal direction to the lingual side.

[0040] It should be noted that the present embodiment does not limit the specific value of the correction weight coefficient, which may be any set of coefficients that can reflect the relative difficulty of achieving correction of the target tooth in different movement modes.

[0041] It is understandable that when different methods are used to measure the relative difficulty of achieving correction of the target tooth in different movement modes, the specific values ​​of the correction weight coefficients obtained will also be different, but they can all reflect the relative difficulty of achieving the target correction of the target tooth in different movement modes. Therefore, determining the correction weight coefficient is essentially to quantify the relative difficulty of achieving correction of the target tooth in different movement modes, so as to obtain comparable parameters, which is convenient for the subsequent evaluation of the correction required to achieve the target tooth in different movement modes.

[0042] In some embodiments, the correction weight coefficient of the target tooth in different movement modes is obtained by counting the expression rate of the target correction under each movement mode.

[0043] Among them, the expression rate can reflect the degree of achieving the desired correction results.

[0044] In other words, the correction weight coefficient is obtained based on the quantitative value of the actual correction result - the expression rate statistics. The correction weight coefficient obtained in this way will better reflect the actual rules in correction, be more accurate and reliable, and more in line with actual application needs.

[0045] In some embodiments, the correction weight coefficient may be obtained based on the statistical expression rates of the teeth at the tooth position where the target tooth is located in each movement mode.

[0046] The tooth position is the number corresponding to the target tooth under the same tooth position representation.

[0047] That is to say, when different teeth of different patients are used as target teeth, the corresponding correction weight coefficients under different movement modes are only related to the tooth positions of the teeth. Therefore, the correction weight coefficients can be refined according to different tooth positions and can be unified for different patients, achieving a balance between accuracy and the amount of data (or calculation amount) that needs to be maintained, while ensuring the accuracy and efficiency of the correction weight coefficients.

[0048] In some embodiments, the expression rate is statistically obtained by one or a combination of the following information: clinical data, literature research data, and simulation result data of finite element model simulation of long-term tooth movement.

[0049] Among them, clinical data can more broadly reflect the actual situation of dental orthodontics, making the orthodontic weight coefficient more in line with the patient's clinical treatment; literature research data can more prominently reflect the orthodontic characteristics, making the orthodontic weight system more scientific and reasonable; the simulation result data of the finite element model simulating the long-term movement of teeth does not need to collect data, which is more convenient.

[0050] In this way, statistically analyzing the expression rate in a variety of ways is helpful to provide accurate and objective data, and then determine the accurate and objective correction weight coefficient.

[0051] In some embodiments, the correction weight coefficients for each movement mode may satisfy the following constraints:

[0052]

[0053]

[0054] Where T is the total number of moving modes, is the correction weight coefficient corresponding to the target tooth in the i-th movement mode, and Ai is the expression rate of the tooth at the target tooth's position in the i-th movement mode.

[0055] The correction weight coefficient calculated by the above constraints can more intuitively reflect the difficulty of correction in each correction direction and is more interpretable.

[0056] Of course, there may be no constraints on the correction weight coefficient. For example, the collected expression rate data can be processed by principal component analysis, and the obtained score can be used as the correction weight coefficient. I will not go into details here.

[0057] It should be noted that the above is only an example of the correction weight coefficient. In some embodiments, the correction weight coefficient can also be determined by the correction data of teeth with a similar correction process to the current target tooth. It can also be obtained by further combining the degree of interference of the adjacent teeth of the current target tooth with the correction after obtaining the difficulty rules of correction under different movement methods that are widely met by different patients based on the expression rate. We will not go into details here.

[0058] In some embodiments, in the long axis direction of the tooth, the labial and lingual direction, and the mesiodistal direction, Figure 2 As shown, the mesiodistal direction is from the mesial to the distal direction, the mesial is the position of the tooth close to the facial midline, the distal is the position of the tooth away from the facial midline, the facial midline is an imaginary vertical line that divides the craniofacial area into two equal parts, the labiolingual side is perpendicular to the mesiodistal direction and points from the labial side to the lingual side, and the direction of the long axis of the tooth is from the root to the crown, as shown in the figure. Figure 3 As shown, the movement modes may include: positive movement (A) along the long axis of the tooth, negative movement (B) along the long axis of the tooth, positive movement (C) along the labiolingual direction, negative movement (D) along the labiolingual direction, positive movement (E) along the mesiodistal direction, negative movement (F) along the mesiodistal direction, rotational movement (G) along the long axis of the tooth toward the mesial, rotational movement (H) along the long axis of the tooth toward the distal, rotational movement (I) along the labiolingual direction toward the mesial, rotational movement (J) along the labiolingual direction toward the distal, rotational movement (K) along the mesiodistal direction toward the labial, and rotational movement (L) along the mesiodistal direction toward the lingual.

[0059] That is to say, a variety of movement modes are provided based on the local tooth coordinate system, and the form is more suitable for the scenario of determining the correction target in the local tooth coordinate system. In this scenario, there is no need to transform the correction target, which can reduce the amount of processing calculations and improve processing efficiency. It is conducive to better and more accurately determining the target tooth attachment in the scenario of determining the correction target in the local tooth coordinate system, thereby improving the correction effect. And the movement mode is decomposed very finely, which is conducive to accurately determining the target movement direction, and then more accurately determining the target tooth attachment. At the same time, the above-mentioned movement mode division is consistent with the division of tooth correction directions under general circumstances, which is conducive to obtaining more data on the expression rate, reducing or avoiding data processing, and making the correction weight coefficient determined by the expression rate more accurate.

[0060] It should be noted that the above is only an example of the movement method. In some embodiments, the movement method may also include translation in the long axis direction of the tooth, translation in the labiolingual direction, translation in the mesiodistal direction, rotation in the long axis direction of the tooth, rotation in the labiolingual direction and rotation in the mesiodistal direction; or, the movement method may also include translation direction and rotation direction, which will not be elaborated here.

[0061] In order to facilitate those skilled in the art to better understand the above embodiment, the implementation of step 101 is illustrated below.

[0062] In one example, through clinical data research, data of male patients aged 18 to 35 with good periodontal condition were collected as statistical research objects, and the patients' teeth were statistically analyzed in 12 ways of movement in 6 degrees of freedom (positive direction of the long axis of the tooth, negative direction of the long axis of the tooth, positive direction of the labiolingual direction, negative direction of the labiolingual direction, positive direction of the mesiodistal direction, negative direction of the mesiodistal direction, rotation direction around the long axis of the tooth to the mesiodistal direction, rotation direction around the long axis of the tooth to the distal direction, rotation direction around the labiolingual direction to the mesiodistal direction, rotation direction around the labiolingual direction to the mesiodistal direction, rotation direction around the labiolingual direction to the lab ... The average value of the expression rate (the percentage of the actual correction amount and the designed correction amount) of the rotation direction (rotation direction to the distal, rotation direction around the mesiodistal direction to the labial side, and rotation direction around the mesiodistal direction to the lingual side) is calculated, and the t-test is used for the average value. If the average values ​​of the expression rates of different degrees of freedom are significantly statistically different, the difficulty of achieving the six degrees of freedom of the tooth is ranked from small to large according to the average values. The smaller the average value, the lower the expression rate and the greater the correction difficulty. If there is no significant statistical difference, it is considered that the two movement methods have equivalent correction difficulty. Then, according to the sorted order of each movement method, determine which movement method each movement method is in the constraints in the aforementioned embodiment, and then determine the specific value of the correction weight coefficient corresponding to each movement method based on the constraints in the aforementioned embodiment.

[0063] In one example, the expression rate of different types of movement of a single tooth can be obtained by finite element simulation calculation of long-term tooth movement, and the difficulty of different types of tooth movement can be ranked according to the expression rate. For example, the different types of movement correction difficulty obtained for tooth No. 1 through clinical statistical analysis are as follows: extension> mesial rotation / distal rotation around the labiolingual axis> depression> mesial / distal translation> mesial rotation / distal rotation around the long axis> labial movement / lingual movement> labial rotation / lingual rotation around the mesiodistal direction, and the correction weight coefficients corresponding to the twelve movement methods are determined according to this order.

[0064] In one example, through literature research, the expression rate of the patient's main movement mode and the other movement modes with a smaller degree of correction is obtained, and the movement modes are sorted according to the corresponding expression rate, and the correction weight coefficient corresponding to each movement mode is determined according to the sorting result. It should be noted that the above examples are all explanations of step 101 with the correction weight coefficient as an unknown condition. In some examples, step 101 can also be implemented with the correction weight coefficient as a known condition. In this case, the correction weight coefficient can be determined by reading, user input, etc., and will not be repeated here.

[0065] Step 102, determining the quantitative parameters of the target tooth in different movement modes, where the quantitative parameters are used to characterize the degree to which the correction of the target tooth in the corresponding movement mode is close to the limit state.

[0066] It should be noted that the present embodiment does not limit the specific values ​​of the quantitative parameters, which may be any set of parameters that can reflect the degree of proximity of the correction of the target tooth in the corresponding movement mode to the limit state.

[0067] It is understandable that the specific values ​​of the quantitative parameters may vary depending on the way of measuring the degree of proximity of the target tooth to the limit state in the corresponding movement mode, but they can all reflect the degree of proximity of the target tooth to the limit state in the corresponding movement mode.

[0068] In some embodiments, determining the quantitative parameters of the target tooth in the different movement modes can be achieved in the following manner: according to the reference correction distance of the target tooth in each movement mode, the target correction distance is normalized to obtain the quantitative parameter, and the reference correction distance is the maximum correction distance of the target tooth in the corresponding movement mode under the extreme state.

[0069] It should be noted that the “correction distance” in the above embodiment corresponds to a length in the case of translation and to an angle in the case of rotation.

[0070] In other words, the target correction distance is normalized by reference to the correction distance to obtain a quantitative parameter, which is used to evaluate the difficulty of correction, making the evaluation of the correction of the target teeth in various movement modes more accurate, intuitive, and quantifiable, thereby making the selection of the target correction direction more reasonable, and the determination of the target tooth attachments more accurate, and the correction effect better.

[0071] In some embodiments, the target correction distance is normalized according to the following expression: Pi = Mi / Ni, where Pi is the normalized result of the target correction distance in the i-th movement mode, Mi is the target correction distance in the i-th movement mode, and Ni is the reference correction distance in the i-th movement mode.

[0072] That is to say, normalizing the target correction distance with the reference correction distance as a reference can eliminate the differences in different dimensions of the movement amounts under different movement modes and realize comparative calculation of different movement amounts.

[0073] In order to help those skilled in the art better understand the above embodiments, an example of determining a quantization parameter is given below.

[0074] In one example, the maximum design movement threshold allowed for each movement mode is obtained through clinical experience and / or tooth anatomical characteristics as a corresponding reference correction example. For example, the maximum design movement threshold allowed for the tooth elongation / depression amount of the target tooth position is 5mm, and the target correction distance of the target tooth in the elongation movement direction is 1mm. At this time, the quantitative parameter in the elongation movement direction is 1 / 5.

[0075] Of course, the above is only an example of the quantitative parameter. In some embodiments, the quantitative parameter can also be determined in the following way: determine the correction distance-expression rate curve according to the expression rate data corresponding to different correction distances of the tooth at the target tooth position under each movement mode, and then determine the expression rate at the target correction distance of the corresponding movement mode based on the curve as the quantitative parameter. The expression rate at the target correction distance of the corresponding movement mode determined based on the curve can also be further processed as a quantitative parameter, etc., which will not be described one by one here.

[0076] Step 103, evaluating the degree of difficulty of correction of the target tooth in each movement mode according to the correction weight coefficient and the quantitative parameter.

[0077] This embodiment does not limit the evaluation rule, and any rule that determines the degree of difficulty of correction of the target tooth in each movement mode according to the correction weight coefficient and the quantitative parameter can be used.

[0078] In some embodiments, the correction difficulty of the target tooth in each movement mode is evaluated based on the correction weight coefficient and the quantitative parameter, which can be achieved in the following way: according to the quantitative parameter, the correction difficulty of the target tooth in each movement mode is evaluated to obtain an initial evaluation score; using the correction weight coefficient as the weight of the corresponding initial evaluation score, determining the evaluation score of the correction difficulty of the target tooth in the corresponding movement mode.

[0079] It is understandable that the oral conditions of different patients may be different. Therefore, the quantitative parameters can be further processed according to the oral conditions of different patients to obtain an initial evaluation score that is more in line with the actual situation of the patient. Of course, in order to simplify the processing process, the quantitative parameters can be used as the initial evaluation score to improve efficiency.

[0080] Based on this, in some embodiments, the degree of difficulty of correction of the target tooth in each movement mode is evaluated according to the quantitative parameters to obtain an initial evaluation score, which can be achieved in the following way: the initial evaluation score of the target tooth in each movement mode is obtained by the following expression:

[0081] Xi=Si;

[0082] The correction weight coefficient is used as the weight of the corresponding initial evaluation score to determine the evaluation score of the correction difficulty of the target tooth in the corresponding movement mode, which is achieved in the following way: the correction evaluation of the target tooth in each movement mode is determined by the following expression:

[0083] Ri=Xi*Yi,

[0084] Among them, Xi is the initial evaluation score of the target tooth in the i-th movement mode, Ri is the evaluation score of the target tooth in the i-th movement mode, Si is the quantitative parameter of the target tooth in the i-th movement mode, and Yi is the correction weight coefficient of the target tooth in the i-th movement mode.

[0085] In this way, the embodiment of the present application comprehensively considers the influence of the target correction distance and the correction weight coefficient, which is conducive to ensuring the accuracy of the evaluation, and further can accurately determine the target movement direction, thereby improving the accuracy of determining the target tooth attachment.

[0086] It should be noted that the above is only an example of the implementation of step 103. In some embodiments, step 103 can also be implemented in the following way: the difficulty of correction of the target tooth in each movement mode is evaluated according to the correction weight coefficient, the quantitative parameter and the health of the teeth adjacent to the target tooth. This will not be repeated here.

[0087] The tooth correction evaluation method provided in the above embodiment determines the correction weight coefficient and quantitative parameters of the target tooth in different movement modes, so that the correction difficulty and correction amount of the target tooth in different movement modes can be quantified. Therefore, according to the correction weight coefficient and quantitative parameters, the correction difficulty of the target tooth in each movement mode is evaluated, and a more reasonable and accurate evaluation result with unified standard, objective, quantifiable comparison can be automatically obtained, that is, a better evaluation of the difficulty of tooth correction can be achieved. Therefore, based on the evaluation results, the tooth attachment can be better determined to better assist the appliance in correction and achieve a better correction effect.

[0088] On the other hand, the present application also provides a method for determining a tooth attachment, which is applied to electronic devices such as computers, servers, mobile phones, etc., which will not be described in detail here. Figure 4As shown, the method for determining tooth attachments includes the following steps:

[0089] Step 401, evaluating the degree of difficulty of correction of the target tooth in each movement mode, and determining the target movement mode to be added with an accessory from each movement mode according to the evaluation result.

[0090] It should be noted that, in this embodiment, the evaluation of the difficulty of correction of the target tooth in each movement mode is achieved by the tooth correction evaluation method provided by any of the aforementioned embodiments, which will not be described in detail here.

[0091] It should also be noted that this embodiment does not limit the selection rules of the target movement mode, which can be set according to the current actual correction situation, or the most difficult movement mode can be selected.

[0092] Based on this, in some embodiments, after evaluating the difficulty of correction of the target tooth in each movement mode according to the correction weight coefficient and the quantitative parameter, the method for determining the tooth attachment also includes: determining the most difficult movement mode of the target tooth as the target movement mode according to the evaluation result.

[0093] In other words, the movement mode with the highest evaluation score is used as the basis for selecting the target tooth attachment, so that the selected target tooth attachment can assist in achieving the correction goal under the most difficult movement mode to the greatest extent, thereby improving the correction effect.

[0094] In an example, assuming that the evaluation result is an evaluation score, and the higher the difficulty, the higher the evaluation score. At this time, according to the evaluation result, the most difficult movement mode of the target tooth is determined as the target movement mode, that is, the evaluation scores of the target tooth in each movement mode are sorted, and the movement mode corresponding to the largest evaluation score is used as the target movement mode.

[0095] Of course, the above is only an explanation of the target movement mode selection method. In some embodiments, other principles can be adopted for selection, which will not be described in detail here.

[0096] Step 402, determining the target tooth attachment according to the target movement mode.

[0097] It is understandable that if Figure 5 As shown, tooth attachments have various shapes, and tooth attachments of different shapes will produce different correction effects in different movement directions.

[0098] It should be noted that Figure 5 The shapes of the tooth attachments are only given as examples, and do not mean that the tooth attachments have only Figure 5 Shape shown.

[0099] Based on this, in some embodiments, the target tooth attachment is determined according to the target movement mode, which can be achieved in the following way: from tooth attachments of different shapes, a tooth attachment whose force application surface and the orthodontic device work together to provide the optimal correction effect power in the target movement mode is selected as the target tooth attachment.

[0100] In other words, the target tooth attachment is selected based on the treatment effect provided by the force-applying surface and the appliance in the target treatment direction. This is conducive to ensuring that the target tooth attachment can achieve the best treatment effect in the target treatment direction with the appliance after being applied to the target tooth, thereby reducing the difficulty of correction in the target treatment direction.

[0101] In some embodiments, when determining the tooth attachment, a tooth attachment library may have been pre-established, wherein the tooth attachment library has clearly defined the mapping relationship between various types of tooth attachments and the movement modes of their auxiliary movement, so after determining the target movement mode, the attachment type corresponding to the target movement mode may be determined according to the mapping relationship. It should be noted that this embodiment does not limit the determination method of the mapping relationship between various types of tooth attachments and the movement modes of their auxiliary movement, which may be set based on manual experience or determined based on relevant data analysis, and will not be described in detail here.

[0102] Of course, the above is merely an example of the implementation method of step 402. In some embodiments, a tooth accessory that provides maximum power in the target movement mode and provides power not less than a preset threshold in other movement modes can also be selected as the target tooth accessory, etc.

[0103] On the other hand, the present application also provides a method for manufacturing a dental appliance, which is applied to electronic devices such as computers, servers, mobile phones, etc., which will not be described in detail here. In some embodiments, the process is as follows: Figure 6 As shown, at least the following steps are included:

[0104] Step 601, determine the target tooth attachment and set the target tooth attachment on the target tooth to obtain a target dental model.

[0105] The target tooth attachment is determined according to the method for determining the tooth attachment as described in any of the above embodiments.

[0106] Step 602: Generate a shell-shaped dental appliance according to the target jaw model.

[0107] In some examples, generating a shell-shaped dental appliance according to a target dental model can be achieved in the following manner: manufacturing a positive mold of the appliance according to the target dental model; obtaining a shell-shaped dental appliance containing a tooth shape by hot pressing on the positive mold of the appliance; and cutting along the gum line or adjacent to the gum line on the shell-shaped dental appliance containing a tooth shape to obtain a shell-shaped dental appliance capable of accommodating teeth. That is, after obtaining the target dental model, extracting and converting data of the target dental model, converting the data of the target dental model into specification data for manufacturing the positive mold of the appliance, and then completing the manufacture of the positive mold of the appliance according to the obtained specification data, and then using a hot pressing forming device, through positive pressure film pressing technology, pressing the appliance membrane composed of a transparent polymer material (elastic polymer, such as polycarbonate) on the positive mold of the above-mentioned appliance to form a shell, thereby obtaining a shell-shaped dental appliance containing a tooth shape. The hot pressing forming method greatly improves manufacturing efficiency and accuracy. Among them, in order to make the manufactured dental appliance play a good correction role, it is necessary to ensure that the dental appliance can be used normally. Therefore, on the hot-pressed shell-shaped dental appliance, the shell-shaped dental appliance is cut along the gum line or adjacent to the gum line, so that the cut shell-shaped dental appliance can accommodate the patient's teeth, thereby completing the manufacture of the shell-shaped dental appliance.

[0108] In other examples, the generation of a shell-shaped dental appliance according to the target dental model can also be achieved in the following manner: generating a digital appliance model that matches the target dental model; and manufacturing the shell-shaped dental appliance through an additive manufacturing process according to the data information corresponding to the digital appliance model. That is, after the target dental model is created, a digital appliance that includes a housing space for accommodating the target dental model and matches the target dental model is manufactured according to the target dental model.

[0109] It should be noted that when a shell-shaped dental appliance is manufactured by an additive manufacturing process, rapid prototyping technology can be used for manufacturing, and the specification data of the digital appliance is converted into a data format corresponding to the rapid prototyping technology used, and then the manufacturing is completed using rapid prototyping technology. Among them, the rapid prototyping technologies used include: stereolithography (STL), stereo lithography (SLA), laminated object manufacturing (LOM), selected laser sintering (SLS), fused deposition modeling (FDM), three-dimensional printing (3DP), etc., and there is no restriction on the specific rapid prototyping technology used.

[0110] It should be noted that during the creation of a digital appliance, the auxiliary devices needed in the orthodontic process can also be considered. Based on the digital models of auxiliary devices such as auxiliary corrective devices and fasteners that need to be used, the digital appliance includes a storage space for accommodating the digital models corresponding to the auxiliary devices. The generated digital appliance includes a storage space for accommodating the target dental model, and may also include a storage space for accommodating the digital models corresponding to the auxiliary devices.

[0111] The step division of the above methods is only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0112] Another aspect of the present invention is to provide an electronic device, such as Figure 7 As shown, it includes: at least one processor 701; and a memory 702 that is communicatively connected to the at least one processor 701; wherein the memory 702 stores instructions that can be executed by the at least one processor 701, and the instructions are executed by the at least one processor 701 so that the at least one processor 701 can execute the method described in any of the above method embodiments.

[0113] The memory 702 and the processor 701 are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors 701 and the memory 702 together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor 701 is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor 701.

[0114] The processor 701 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 702 can be used to store data used by the processor 701 when performing operations.

[0115] Another aspect of the present invention provides a computer-readable storage medium storing a computer program, which implements the above method embodiment when executed by a processor.

[0116] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0117] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A method for evaluating orthodontic treatment, characterized in that: include: Determine a correction weight coefficient of the target tooth in different movement modes, wherein the correction weight coefficient is used to characterize the relative difficulty of achieving correction of the target tooth in the different movement modes; Determine a quantitative parameter of the target tooth in different movement modes, wherein the quantitative parameter is used to characterize the degree to which the correction of the target tooth in the corresponding movement mode is close to a limit state; The degree of difficulty of correction of the target tooth in each of the movement modes is evaluated according to the correction weight coefficient and the quantitative parameter.

2. The method for evaluating orthodontic treatment according to claim 1, characterized in that: The determining of the quantitative parameters of the target tooth in different movement modes includes: The target correction distance is normalized according to the reference correction distance of the target tooth in each movement mode to obtain the quantitative parameter, and the reference correction distance is the maximum correction distance of the target tooth under the limit state in the corresponding movement mode.

3. The method for evaluating dental orthodontics according to claim 2, characterized in that: The normalizing process of the target correction distance according to the reference correction distance of the target tooth in each movement mode includes: The target correction distance is normalized according to the following expression: Pi=Mi / Ni, Among them, Pi is the normalized result of the target correction distance in the i-th movement mode, Mi is the target correction distance in the i-th movement mode, and Ni is the reference correction distance in the i-th movement mode.

4. The method for evaluating orthodontic treatment according to any one of claims 1 to 3, characterized in that: The correction weight coefficient is obtained according to the statistical expression rate of the tooth at the tooth position where the target tooth is located in each of the movement modes.

5. The method for evaluating orthodontic treatment according to claim 4, characterized in that: The expression rate is obtained by statistics of one or a combination of the following information: clinical data, literature research data and simulation result data of finite element model simulating long-term tooth movement.

6. The method for evaluating orthodontic treatment according to claim 4, characterized in that: The correction weight coefficients on each of the movement modes satisfy the following constraints: in, Where T is the total number of movement modes, is the correction weight coefficient corresponding to the target tooth in the i-th movement mode, and Ai is the expression rate calculated based on statistics of the tooth at the tooth position where the target tooth is located in the i-th movement mode.

7. The method for evaluating orthodontic treatment according to any one of claims 1 to 3, characterized in that: The step of evaluating the degree of difficulty of correction of the target tooth in each movement mode according to the correction weight coefficient and the quantitative parameter includes: According to the quantitative parameters, the degree of difficulty of correction of the target tooth in each movement mode is evaluated to obtain an initial evaluation score; The correction weight coefficient is used as the weight of the corresponding initial evaluation score to determine the evaluation score of the correction difficulty of the target tooth in the corresponding movement mode.

8. The method for evaluating dental orthodontics according to claim 7, characterized in that: The step of evaluating the degree of difficulty of correction of the target tooth in each movement mode according to the quantitative parameter to obtain an initial evaluation score includes: The initial evaluation score of the target tooth in each movement mode is obtained by the following expression: Xi=Si; The step of determining the evaluation score of the degree of difficulty of correction of the target tooth in the corresponding movement mode by taking the correction weight coefficient as the weight of the corresponding initial evaluation score comprises: determining the evaluation score of the target tooth in each movement mode by the following expression: Ri=Xi*Yi, Among them, Xi is the initial evaluation score of the target tooth in the i-th movement mode, Ri is the evaluation score of the target tooth in the i-th movement mode, Si is the quantitative parameter of the target tooth in the i-th movement mode, and Yi is the correction weight coefficient of the target tooth in the i-th movement mode.

9. The method for evaluating orthodontic treatment according to any one of claims 1 to 3, characterized in that: The movement mode includes at least two of the following directions: the positive direction of the long axis direction of the tooth, the negative direction of the long axis direction of the tooth, the positive direction of the labiolingual direction, the negative direction of the labiolingual direction, the positive direction of the mesiodistal direction, the negative direction of the mesiodistal direction, the rotation direction around the long axis direction of the tooth to the mesial, the rotation direction around the long axis direction of the tooth to the distal, the rotation direction around the labiolingual direction to the mesial, the rotation direction around the labiolingual direction to the distal, the rotation direction around the mesiodistal direction to the labial side, and the rotation direction around the mesiodistal direction to the lingual side.

10. A method for determining tooth attachments, characterized in that: include: According to the tooth correction evaluation method as claimed in any one of claims 1 to 8, the correction difficulty of the target tooth in each movement mode is evaluated, so as to determine the target movement mode to be added with an accessory from each of the movement modes according to the evaluation result; According to the target movement mode, a target tooth attachment is determined.

11. The method for determining tooth attachments according to claim 10, characterized in that: The step of determining a target moving mode to which an accessory needs to be added from each moving mode according to the evaluation result includes: According to the evaluation result, the most difficult movement mode of the target tooth is determined as the target movement mode to which an accessory needs to be added.

12. The method for determining tooth attachments according to claim 10 or 11, characterized in that: The step of determining a target tooth attachment according to the target movement mode includes: From tooth attachments of different shapes, a tooth attachment that provides an optimal correction effect in the target movement mode after the force-applying surface and the orthodontic appliance cooperate with each other is selected as the target tooth attachment.

13. A method for manufacturing a dental appliance, characterized in that: include: According to the method for determining a tooth attachment according to any one of claims 10 to 12, a target tooth attachment is determined and the target tooth attachment is set on a target tooth to obtain a target dental jaw model; A shell-shaped dental appliance is generated according to the target dental model.

14. The method for manufacturing a dental appliance according to claim 13, characterized in that: The step of generating a shell-shaped dental appliance according to the target jaw model comprises: manufacturing a positive mold of the orthodontic appliance according to the target dental model; A shell-shaped dental appliance having a tooth shape is obtained by hot pressing on the male mold of the appliance; The shell-shaped dental appliance including the tooth shape is cut along the gum line or adjacent to the gum line to obtain a shell-shaped dental appliance capable of accommodating the tooth.

15. The method for manufacturing a dental appliance according to claim 13, characterized in that: The step of generating a shell-shaped dental appliance according to the target jaw model comprises: Generating a digital orthodontic appliance model that matches the target dental model; According to the data information corresponding to the digital appliance model, a shell-shaped dental appliance is manufactured through an additive manufacturing process.

16. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the evaluation method of dental orthodontics as described in any one of claims 1 to 9, or execute the method for determining dental accessories as described in any one of claims 10 to 12, or execute the method for manufacturing a dental appliance as described in any one of claims 13 to 15.

17. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, it implements the method for evaluating a dental orthodontic treatment as described in any one of claims 1 to 9, or implements the method for determining a tooth accessory as described in any one of claims 10 to 12, or implements the method for manufacturing a dental orthodontic appliance as described in any one of claims 13 to 15.

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