Silica gel occlusion induction unit with personalized tooth socket design

Abstract

The invention provides a silica gel occlusion induction unit with personalized tooth socket design, which is obtained according to the following method: obtaining initial mixed dentition and dental arch data of a patient through oral scanning and importing the data into digital software; calculating according to the initial mixed dentition dental arch data of the patient to obtain a constant dentition target dental arch after the treatment of the patient is finished; overlapping and integrating the initial dental arch of the patient and the target dental arch after treatment; according to the integrated digital model, designing tooth space morphological parameters of the personalized occlusion induction unit; determining a theoretical model of the occlusion induction unit according to the obtained tooth space morphological parameters; according to the obtained theoretical model of the occlusal induction unit, the solid occlusal induction unit is prepared, and the wearing comfort and the treatment effect can be both considered.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a silicone bite inducer with a personalized tooth socket design. Background Art

[0002] In recent years, due to changes in eating habits, lifestyles, and social environments, the prevalence of malocclusion in children has increased. With the improvement of people's living standards and the popularization of oral health knowledge, more and more parents are aware of the importance of children's oral health and tooth occlusion to function and facial beauty, and more and more children are seeking early correction. Different types of braces can be selected according to the child's development and malocclusion, among which silicone braces are one of the most commonly used braces for early correction of children.

[0003] The current silicone braces can be divided into muscle trainers, bite induction devices, snoring devices and positioners based on their functions. Among them, muscle trainers and bite induction devices are suitable for most children, so they have the largest application range. And since almost all children need muscle function training and bite induction, most of the silicone braces currently used in clinical practice have both of the above functions. However, the existing silicone braces need to be improved in many aspects of the design of the alveolar sockets. Some braces are designed with a relatively wide alveolar socket, with only an arch socket and no tooth socket, which makes them easier to put into place, but has weak control over the teeth. Some braces have precise tooth sockets in some tooth positions, but are only divided into several types for combination design based on the arch shape and tooth size. Overall, they are not personalized enough and cannot meet the arch shape of all patients. This will cause uneven force on the teeth, oral mucosa or lip and tongue tissues, and even abnormal force, which will greatly affect the comfort and efficacy of the patient's wearing. In the case of difficulties in wearing and positioning, adjustments are often required during clinical use, which also increases the workload and difficulty of the doctor. A large number of patients are unable to choose braces with a sufficiently good match during the treatment process, which affects the efficacy, prolongs the course of treatment, affects the comfort, and increases the difficulty of the patient's cooperation. There are also a few personalized silicone orthodontic tools. The tooth sockets are designed according to the patient's actual dental arch, or a step-by-step design similar to invisible braces is used. Although this increases comfort, it does not provide enough free adjustment space for tooth movement and growth adaptation. For the same treatment cycle, the treatment effectiveness is not as good as the optional type of inducer. If the wearing time is reduced and the number of inducers is increased, it is not as convenient, fast and economical as invisible braces. Summary of the invention

[0004] In view of the above problems, the present invention provides a silicone bite inducer with a personalized tooth groove design, which can take into account both wearing comfort and treatment effect. Based on this, the present invention is completed.

[0005] In a first aspect, the present invention provides a silicone bite inducer with a personalized tooth socket design, wherein the bite inducer is obtained according to the following method:

[0006] Step 1: Obtain the patient's initial mixed dentition arch data through oral scanning and import it into the digital software. According to the patient's initial mixed dentition arch data, calculate the patient's permanent dentition target arch after treatment.

[0007] Step 2: Overlap and integrate the patient's initial dental arch with the target dental arch after treatment;

[0008] Step 3: Design the tooth socket morphology parameters of the personalized bite guide according to the integrated digital model;

[0009] 1): In the horizontal direction (left and right), for teeth that need to be moved in the lip / cheek direction, the inner wall of the tooth alveolar is fitted with the lingual / palatal side of the patient's initial dental arch, and the outer wall is in contact with the lip / cheek side of the ideal dental arch after treatment. For teeth that need to be moved in the lingual / palatal direction, the outer wall of the tooth alveolar is fitted with the lip / cheek side of the patient's initial dental arch, and the inner wall is in contact with the lingual / palatal side of the ideal dental arch after treatment;

[0010] 2): In the vertical direction (up and down), the depth change of the tooth socket is determined according to the control requirements of the tooth eruption height. The tooth socket depth of the final position of the tooth that needs to be suppressed is less than or equal to the initial position, and a gentle transition is formed; for teeth that have not yet erupted to the target height or need to be elongated according to the treatment goal, the tooth socket depth at the final position is greater than the initial position, and a gentle transition is formed;

[0011] 3): In the sagittal direction (front and back), for teeth that need to be moved mesially, the distal surface of the tooth socket is made to fit with the distal surface of the tooth; for teeth that need to be moved distally, the mesial surface of the tooth socket is made to fit with the mesial surface of the tooth; a smooth transition is formed between the initial position and the final position;

[0012] Step 4: Determine the theoretical model of the occlusal inducer according to the obtained tooth socket morphology parameters;

[0013] Step 5: According to the theoretical model of the bite inducer obtained in step 4, select silicone material and prepare a physical bite inducer.

[0014] In a second aspect, the present invention provides a method for preparing a silicone bite inducer with a personalized tooth socket design, the method comprising the following steps:

[0015] Step 1: Obtain the patient's initial mixed dentition arch data through oral scanning and import it into the digital software. According to the patient's initial mixed dentition arch data, calculate the patient's permanent dentition target arch after treatment.

[0016] Step 2: Overlap and integrate the patient's initial dental arch with the target dental arch after treatment;

[0017] Step 3: Design the tooth socket morphology parameters of the personalized bite guide according to the integrated digital model;

[0018] 1): In the horizontal direction (left and right), for teeth that need to be moved in the lip / cheek direction, the inner wall of the tooth alveolar is fitted with the lingual / palatal side of the patient's initial dental arch, and the outer wall is in contact with the lip / cheek side of the ideal dental arch after treatment. For teeth that need to be moved in the lingual / palatal direction, the outer wall of the tooth alveolar is fitted with the lip / cheek side of the patient's initial dental arch, and the inner wall is in contact with the lingual / palatal side of the ideal dental arch after treatment;

[0019] 2): In the vertical direction (up and down), the depth change of the tooth socket is determined according to the control requirements of the tooth eruption height. The tooth socket depth of the final position of the tooth that needs to be suppressed is less than or equal to the initial position, and a gentle transition is formed; for teeth that have not yet erupted to the target height or need to be elongated according to the treatment goal, the tooth socket depth at the final position is greater than the initial position, and a gentle transition is formed;

[0020] 3): In the sagittal direction (front and back), for teeth that need to be moved mesially, the distal surface of the tooth socket is made to fit with the distal surface of the tooth; for teeth that need to be moved distally, the mesial surface of the tooth socket is made to fit with the mesial surface of the tooth; a smooth transition is formed between the initial position and the final position;

[0021] Step 4: Determine the theoretical model of the occlusal inducer according to the obtained tooth socket morphology parameters;

[0022] Step 5: According to the theoretical model of the bite inducer obtained in step 4, select silicone material and prepare a physical bite inducer.

[0023] Furthermore, for patients whose initial treatment position is significantly different from the target position, multiple sets of braces can be designed, with the target position achieved by the previous set of braces used as the initial position for the next set of braces, and so on, until the final treatment target position is reached.

[0024] Beneficial Effects

[0025] There are many manifestations of malocclusion, and the treatment goals vary from person to person. Depending on the patient's initial occlusal performance and the planned treatment goals, the movement strategy of each tooth in three-dimensional space is different. In the horizontal direction, a reasonable dental arch shape and arch width should be obtained. For the horizontal dental arch imbalance caused by narrow dental arch, too wide dental arch, excessive coverage of the posterior teeth / positive occlusion / negative occlusion, the present invention moves the corresponding teeth buccolingually to coordinate the widths of the upper and lower dental arches. In the sagittal direction, a reasonable cusp, molar relationship and anterior tooth coverage relationship should be obtained. If there is an cusp, molar imbalance and deep coverage / negative coverage in the anterior teeth in the sagittal direction, the present invention adjusts the mesiodistal position of the teeth to coordinate the sagittal dental arch relationship and the anterior tooth axis. In order to obtain a reasonable lower face height, occlusal plane and overbite relationship of the anterior teeth in the vertical direction, for patients with too long / short lower face height, too steep / flat occlusal plane, deep overbite / open bite of the anterior teeth, and uncoordinated eruption height of the upper and lower permanent teeth, the present invention adjusts the height of the anterior and posterior teeth vertically upward to establish a reasonable eruption stop point for the upper and lower permanent teeth, coordinate the eruption amount of the anterior and posterior teeth, adjust the occlusal plane, establish a reasonable overbite relationship and improve the lower face height.

[0026] Compared with existing silicone braces, the present invention designs a personalized initial treatment position. A part of the initial brace tooth socket is highly fitted with the patient's initial dental arch, which can ensure comfort and adaptability during initial wearing, and reduce the difficulty of cooperation for patients and management for doctors. The present invention designs a personalized treatment target position. The target position is designed according to the ideal dental arch morphology of the patient after treatment, which can meet the personalized treatment needs of the patient, increase the correction efficiency of the brace, effectively ensure the correction effect and reduce recurrence. The buccal / lingual / mesial / distal walls of the tooth socket are in fit with the initial dental arch, and the force exerted on the teeth is strong, which can produce a corrective force on the teeth and help the movement of the teeth; the design of the tooth socket includes both the initial treatment position and the target position, so that there is enough space between the inner and outer walls to establish an eruption guide path for the teeth that are erupting or about to erupt, and guide these teeth to erupt and build to the ideal position. By personalizing the design of the buccal, lingual, mesial, distal walls and thickness of the tooth alveolar, the width of the dental arch can be controlled horizontally, the mesial-distal relationship of the teeth can be controlled sagittally, and the vertical height of the teeth can be adjusted vertically, thereby controlling the position of the teeth in three-dimensional space.

[0027] Occlusal induction is different from invisible orthodontics. Invisible orthodontics only relies on the mechanical force applied to the teeth by the material to move them, while occlusal induction is mainly achieved by pushing the adjacent teeth through the eruption force of the teeth during eruption. Therefore, although the mechanical force applied by the induction groove design of the present invention to the erupted teeth is not large or will decay quickly, the pushing of the eruption force of the newly erupted teeth and the directional adjustment direction provided by the induction groove will direct the eruption force in a reasonable direction during the eruption and replacement of the teeth, helping to expand the dental arch and align the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of measuring the length of a line connecting the mesial contact points of the bilateral first molars of a reference jaw according to Example 1 of the present application;

[0029] Figure 2 Schematic diagram of the fit between the teeth and tooth sockets before treatment;

[0030] Figure 3 Schematic diagram of the fit between the tooth and the tooth socket after treatment;

[0031] Figure 4 Schematic diagram of the fit between the top surface of the appliance and the teeth. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention are further described below. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the embodiments described below can be combined with each other as long as they do not conflict with each other.

[0033] A silicone bite inducer with a personalized tooth socket design, wherein the bite inducer is obtained according to the following method:

[0034] Step 1: Obtain the patient's initial mixed dentition arch data through oral scanning and import it into the digital software. According to the patient's initial mixed dentition arch data, calculate the patient's permanent dentition target arch after treatment.

[0035] Step 2: Overlap and integrate the patient's initial dental arch with the target dental arch after treatment;

[0036] Step 3: Design the tooth socket morphology parameters of the personalized bite guide according to the integrated digital model;

[0037] 1): In the horizontal direction (left and right), for teeth that need to be moved in the lip / cheek direction, the inner wall of the tooth alveolar is fitted with the lingual / palatal side of the patient's initial dental arch, and the outer wall is in contact with the lip / cheek side of the ideal dental arch after treatment. For teeth that need to be moved in the lingual / palatal direction, the outer wall of the tooth alveolar is fitted with the lip / cheek side of the patient's initial dental arch, and the inner wall is in contact with the lingual / palatal side of the ideal dental arch after treatment;

[0038] 2): In the vertical direction (up and down), the depth change of the tooth socket is determined according to the control requirements of the tooth eruption height. The tooth socket depth of the final position of the tooth that needs to suppress eruption is less than or equal to the initial position, and a gentle transition is formed, so that the eruption can be suppressed or relatively depressed when the tooth position moves subsequently; for teeth that have not yet erupted to the target height or need to be elongated according to the treatment goal, the tooth socket depth at the final position is greater than the initial position, and a gentle transition is formed, so that the tooth position can continue to erupt and elongate when the tooth position moves subsequently;

[0039] 3): In the sagittal direction (front and back), for teeth that need to be moved mesially, the distal surface of the tooth socket is aligned with the distal surface of the tooth, and for teeth that need to be moved distally, the mesial surface of the tooth socket is aligned with the mesial surface of the tooth. A smooth transition is formed between the initial position and the final position to avoid affecting the free movement of the tooth;

[0040] Step 4: Determine the theoretical model of the occlusal inducer according to the obtained tooth socket morphology parameters;

[0041] Step 5: According to the theoretical model of the bite inducer obtained in step 4, select silicone material and prepare a physical bite inducer.

[0042] Example 1

[0043] In the embodiment of the present application, by fitting different function types, it is found that the fourth-order (fourth-order) polynomial is the best mathematical representation of the dental arch, which exceeds the beta function and the sixth-order polynomial. The function form of the target dental arch curve is finally determined to be Y=AX 4 +BX 2 .

[0044] In step 1, the method for obtaining the target dental arch of the patient after treatment based on the initial dental arch data of the patient includes the following method:

[0045] Step 1): Determine the dental arch curve of the mandibular dental arch morphology, the dental arch curve is a polynomial function Y=AX 4 +BX 2 , which is completed in the following steps:

[0046] 1.1) Determine the sum of the crown widths from the left second premolar to the right second premolar before treatment (Σ5-5);

[0047] 1.2) calculating IMW according to the equation of the length of the line connecting the mesial contact points of the mandibular first molars on both sides (IMW) and Σ5-5; the equation is IMW=Σ5-5 / 1.47;

[0048] 1.3) Calculate B1 according to the regression equation of adjusted B1 (i.e. adjusted B value) and IMW B1=0.0023×IMW-0.118, further calculate A and B values ​​according to the regression equation of A and B1 A=0.0027×B1-0.00002 and the regression equation of B and A B=-237.32×A-0.027, and obtain the polynomial function of the dental arch curve after treatment Y=AX 4 +BX 2 specific curve.

[0049] Step 2): The dental arch curve after treatment obtained in step 1) is used as the correction target position of the mandible, and the correction target position of the maxilla is determined according to the relative position relationship between the upper and lower dental arches, thereby obtaining the target dental arch after the patient's treatment.

[0050] Furthermore, the sum of the crown widths from the second premolar on the left to the second premolar on the right (Σ5-5) can be directly measured, or it can be calculated by the sum of the crown widths of the four incisors (Σ2-2), the sum of the crown widths of the incisors and canines (Σ3-3), and the sum of the crown widths from the first premolar on the left to the first premolar on the right (Σ4-4). Σ5-5 can be calculated according to the regression equation of Σ5-5 and Σ2-2, the regression equation of Σ5-5 and Σ3-3, or the regression equation of Σ5-5 and Σ4-4.

[0051] Furthermore, the regression equation of Σ5-5 and Σ2-2 is Σ5-5=2.0948×Σ2-2+18.6,

[0052] The regression equation of Σ5-5 and Σ3-3 is Σ5-5=1.4818×Σ3-3+11.907,

[0053] The regression equation of Σ5-5 and Σ4-4 is Σ5-5=1.2813×Σ4-4+0.0444.

[0054] Σ5-5, Σ4-4, Σ3-3 and Σ2-2 can all be used to derive the dental arch curve of any specific jaw. Among them, the use of Σ2-2 for derivation is more applicable to a wider range of people. On the one hand, compared with Σ5-5, Σ4-4 and Σ3-3, the measurement of Σ2-2 is more convenient and faster. On the other hand, since the four mandibular incisors are the first teeth to erupt in the mandibular teeth, Σ2-2 can also be used to deduce the ideal dental arch shape for children whose other teeth have not yet erupted or who are in the early mixed dentition to permanent dentition. As long as the child's four mandibular incisors have erupted, the above method can be used to predict the child's dental arch form.

[0055] The dental arch curve of the dental arch morphology is obtained by keeping the crown width of the four lower incisors, the sum of the crown widths of the mandibular incisors and canines, the sum of the crown widths from the mandibular left first molar to the right first premolar, or the sum of the crown widths from the mandibular left second premolar to the right second premolar, which accurately expresses the ideal dental arch curve after correction. This curve model can be used to clearly define the treatment target for each patient.

[0056] Example 2

[0057] like Figure 2 and Figure 3 As shown, Figure 2 This is a diagram of the fit between the teeth and the tooth socket before treatment. Figure 3It is a schematic diagram of the fitting of teeth and tooth sockets after treatment. The occlusal inducer 1 includes an outer wall 3 and an inner wall 4. The outer wall 3, the inner wall 4 and the top 9 form a tooth socket 2 for accommodating the teeth.

[0058] In the horizontal direction (left and right), for tooth 1 5 that needs to move in the lingual / palatal direction, before treatment, the outer wall 3 of the tooth socket is aligned with the lip / cheek side of the patient's initial dental arch, and the inner wall is in contact with the lingual / palatal side of the ideal dental arch after treatment; for tooth 2 6 that needs to move in the lip / cheek direction, before treatment, the inner wall 4 of the tooth socket 2 is aligned with the lingual / palatal side of the patient's initial dental arch, and the outer wall 3 is in contact with the lip / cheek side of the ideal dental arch after treatment.

[0059] In the sagittal direction (front and back), for the tooth 38 that needs to be moved mesially, the distal surface of the tooth socket 2 is made to fit with the distal surface of the tooth before treatment, and for the tooth 297 that needs to be moved distally, the mesial surface of the tooth socket 2 is made to fit with the mesial surface of the tooth before treatment. A smooth transition is formed between the initial position and the final position so as not to affect the free movement of the tooth.

[0060] like Figure 4 As shown, in the vertical direction (up and down), the thickness of the top 9 of the tooth socket 2 is determined according to the eruption height of the tooth. For over-erupted teeth, a high-thickness top 9 is designed to prevent further eruption and to depress them. For teeth that have not yet erupted to the target height or need to be elongated according to the treatment goal, an average thickness or low thickness top 9 is designed (that is, for teeth that need to suppress eruption, the depth of the tooth socket at the final position is less than or equal to the initial position, and a smooth transition is formed, so that the eruption can be suppressed or relative depression can be achieved when the tooth position moves subsequently; for teeth that have not yet erupted to the target height or need to be elongated according to the treatment goal, the depth of the tooth socket at the final position is greater than the initial position, and a smooth transition is formed, so that the tooth can continue to erupt and elongate when the tooth position moves subsequently).

[0061] For patients whose initial treatment position is significantly different from the target position, multiple sets of orthodontic appliances can be designed, with the target position achieved by the previous set of orthodontic appliances used as the initial position for the next set of orthodontic appliances, and so on, until the final treatment target position is reached.

Claims

1. A silicone bite inducer with a personalized tooth socket design, wherein the bite inducer is obtained according to the following method: Step 1: Obtain the patient's initial mixed dentition arch data through oral scanning and import it into the digital software. According to the patient's initial mixed dentition arch data, calculate the patient's permanent dentition target arch after treatment. Step 2: Overlap and integrate the patient's initial dental arch with the target dental arch after treatment; Step 3: Design the tooth socket morphology parameters of the personalized bite guide according to the integrated digital model; 1): In the horizontal direction (left and right), for teeth that need to be moved in the lip / cheek direction, the inner wall of the tooth alveolar is fitted with the lingual / palatal side of the patient's initial dental arch, and the outer wall is in contact with the lip / cheek side of the ideal dental arch after treatment. For teeth that need to be moved in the lingual / palatal direction, the outer wall of the tooth alveolar is fitted with the lip / cheek side of the patient's initial dental arch, and the inner wall is in contact with the lingual / palatal side of the ideal dental arch after treatment; 2): In the vertical direction (up and down), the depth change of the tooth socket is determined according to the control requirements of the tooth eruption height. The tooth socket depth of the final position of the tooth that needs to be suppressed is less than or equal to the initial position, and a gentle transition is formed; for teeth that have not yet erupted to the target height or need to be elongated according to the treatment goal, the tooth socket depth at the final position is greater than the initial position, and a gentle transition is formed; 3): In the sagittal direction (front and back), for the teeth that need to be moved mesially, the distal surface of the tooth socket is made to fit with the distal surface of the tooth; for the teeth that need to be moved distally, the mesial surface of the tooth socket is made to fit with the mesial surface of the tooth; Create a smooth transition between the initial and final positions; Step 4: Determine the theoretical model of the occlusal inducer according to the obtained tooth socket morphology parameters; Step 5: According to the theoretical model of the bite inducer obtained in step 4, select silicone material and prepare a physical bite inducer.

2. For the inducer as described in claim 1, for patients whose initial treatment position is significantly different from the target position, multiple sets of braces can be designed, and the target position achieved by the previous set of braces can be used as the initial position of the next set of braces, and so on, until the final treatment target position is reached.

3. A method for preparing a silicone bite inducer with a personalized tooth socket design, the method comprising the following steps: Step 1: Obtain the patient's initial mixed dentition arch data through oral scanning and import it into the digital software. According to the patient's initial mixed dentition arch data, calculate the patient's permanent dentition target arch after treatment. Step 2: Overlap and integrate the patient's initial dental arch with the target dental arch after treatment; Step 3: Design the tooth socket morphology parameters of the personalized bite guide according to the integrated digital model; 1): In the horizontal direction (left and right), for teeth that need to be moved in the lip / cheek direction, the inner wall of the tooth alveolar is fitted with the lingual / palatal side of the patient's initial dental arch, and the outer wall is in contact with the lip / cheek side of the ideal dental arch after treatment. For teeth that need to be moved in the lingual / palatal direction, the outer wall of the tooth alveolar is fitted with the lip / cheek side of the patient's initial dental arch, and the inner wall is in contact with the lingual / palatal side of the ideal dental arch after treatment; 2): In the vertical direction (up and down), the depth change of the tooth socket is determined according to the control requirements of the tooth eruption height. The tooth socket depth of the final position of the tooth that needs to be suppressed is less than or equal to the initial position, and a gentle transition is formed; for teeth that have not yet erupted to the target height or need to be elongated according to the treatment goal, the tooth socket depth at the final position is greater than the initial position, and a gentle transition is formed; 3): In the sagittal direction (front and back), for the teeth that need to be moved mesially, the distal surface of the tooth socket is made to fit with the distal surface of the tooth; for the teeth that need to be moved distally, the mesial surface of the tooth socket is made to fit with the mesial surface of the tooth; Create a smooth transition between the initial and final positions; Step 4: Determine the theoretical model of the occlusal inducer according to the obtained tooth socket morphology parameters; Step 5: According to the theoretical model of the bite inducer obtained in step 4, select silicone material and prepare a physical bite inducer.

4. According to the method described in claim 3, for patients whose initial treatment position is significantly different from the target position, multiple pairs of braces can be designed, and the target position achieved by the previous pair of braces can be used as the initial position of the next pair of braces, and so on, until the final treatment target position is reached.

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