A method for constructing a standard form of a normal dental arch of a child and an application graph

Abstract

The application provides a construction method of a normal dental arch standard form of children and an application graph, comprising the following steps: sampling and investigating occlusal development conditions of multiple children in a mixed dentition period and an early permanent dentition period, and obtaining individual normal dental arch models according to the occlusal development conditions and preset inclusion and exclusion criteria; extracting data according to the individual normal dental arch models to obtain dental arch point cloud data; performing form fitting according to the dental arch point cloud data to obtain dental arch form fitting curves; performing cluster analysis according to the dental arch form fitting curves to obtain standard dental arch and basal arch form curves; and drawing an application graph of normal growth and development of children's dental arches according to the standard dental arch and basal arch form curves. The application investigates the occlusal development conditions of children in the mixed dentition period and the early permanent dentition period, simultaneously screens out normal models, measures the dental arch and basal arch forms by using artificial intelligence, obtains average values of actual form size data of Chinese children's dental arches, and provides a reference for early diagnosis and correction of children's malocclusion.

Description

Technical Field

[0001] This invention relates to the field of orthodontic technology, and in particular to a method for constructing a standard morphology of a normal dental arch in children and its application diagram. Background Technology

[0002] wrong Malocclusion refers to abnormal tooth alignment, which has a significant impact on oral function and aesthetics. The WHO states that malocclusion... Malformations rank third among oral health problems. Malocclusion is a common issue among children in my country during their mixed dentition period. Malformations were as high as 71.21%, and 72.92% in the early permanent dentition stage. The causes of malocclusion are complex, including both genetic and environmental factors. Malocclusion during the permanent dentition stage... Malformations are closely related to abnormal development in mixed dentition occlusion.

[0003] Dental arch shape is incorrect in children The diagnosis and treatment planning for deformities play a crucial role and are closely related to the aesthetic outcome and stability after treatment. The standard for correcting deformities should be "individually normal". "And some normal" There are differences in dental arch and basal bone among different populations based on sex, ethnicity, and region. Currently, there are no standardized data on normal dental arch and basal bone arch in children in China. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a method for constructing the standard morphology and application diagram of a normal dental arch in children.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A method for constructing the standard morphology and applied diagrams of a normal dental arch in children, including:

[0007] Sampling survey of multiple mixed dentition stages and permanent dentition The early stage of occlusal development in children was assessed, and individual normal occlusal development was obtained based on the occlusal development and pre-set inclusion and exclusion criteria. Dental model;

[0008] According to the aforementioned individual normal Data was extracted from the dental model to obtain dental point cloud data;

[0009] Based on the dental point cloud data, morphological fitting is performed to obtain the dental arch morphological fitting curve;

[0010] Cluster analysis was performed based on the dental arch morphology fitting curves to obtain the standard dental arch and basal bone arch morphology curves;

[0011] The application graph of normal growth and development of children's dental arch is drawn according to the standard dental arch and basal arch shape curve.

[0012] Preferably, the inclusion and exclusion criteria include inclusion rules and exclusion rules.

[0013] The inclusion rules include the replacement tooth period and permanent tooth Early stage; healthy body; no obvious wear of dental tissue, healthy periodontal and dental tissue; no orthodontic history, no crown restoration in the oral cavity; no conical teeth, fusion teeth deformity; normal Bilateral molar class I occlusion, class I soft tissue profile, basically flat upper and lower dental arch, less than 2mm of crowding degree, less than 1mm of dental arch gap, normal overbite and overjet relationship.

[0014] Preferably, the exclusion rules include systemic disease and genetic disease history; history of maxillofacial trauma; systemic or facial development abnormalities; untreated upper airway disease; oral cavity bad habits; oral orthodontic, restorative treatment history or maxillofacial surgery history; deciduous tooth caries or permanent tooth caries, deep caries or interproximal caries.

[0015] Preferably, the morphological fitting according to the dental arch point cloud data includes:

[0016] Based on 3D scanning technology, using 3-Shape to obtain dental arch point cloud data from individual normal dental arch model;

[0017] According to the morphological denoising closed operation and hole filling of the dental arch point cloud data, the tooth region of the dental arch point cloud data is a connected domain;

[0018] The connected domain is extracted by using an iterative thinning algorithm to obtain a skeleton line; the skeleton line is a two-dimensional skeleton structure of the entire tooth;

[0019] Based on the coordinate matching group technology, the two-dimensional skeleton structure is restored to a three-dimensional skeleton line;

[0020] The three-dimensional skeleton line is fitted by using MATLAB software to obtain the dental arch shape fitting curve.

[0021] Preferably, the standard dental arch and basal arch shape curve is obtained by clustering analysis according to the dental arch shape fitting curve, including:

[0022] Each measurement group is obtained by repeatedly grouping the collected dental arch shape fitting curves according to the measurement index.

[0023] ​​K-mediods clustering algorithm analysis was performed on each of the measurement groups to obtain the morphological curves of the standard dental arch and the basal bone arch.

[0024] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0025] This invention provides a method for constructing the standard morphology and application diagram of a normal dental arch in children, including: sampling surveys of multiple mixed dentition stages and permanent dentition stages. The early stage of occlusal development in children was assessed, and individual normal occlusal development was obtained based on the occlusal development and pre-set inclusion and exclusion criteria. Dental model; based on the individual normal Data is extracted from the dental model to obtain dental point cloud data; morphological fitting is performed on the dental point cloud data to obtain dental arch morphological fitting curves; cluster analysis is performed on the dental arch morphological fitting curves to obtain standard dental arch and basal bone arch morphological curves; application graphics of normal growth and development of children's dental arches are drawn based on the standard dental arch and basal bone arch morphological curves. This invention investigates the mixed dentition period and permanent dentition... Early childhood bite development, and screening for normal bites. The model uses artificial intelligence to measure the morphology of the dental arch and basal bone, and obtains the average value of the actual morphology and size of the dental arch of Chinese children, which is used to identify malocclusion in children. This provides a reference for the early diagnosis and treatment of deformities. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A flowchart of the method provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the fitting morphology curve provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the dental arch curve provided in an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the bone arch curve provided for an embodiment of the present invention;

[0031] Figure 5 The pointed-round maxillary arch morphology and the square-round maxillary arch morphology of stage IIC provided in the embodiments of the present invention;

[0032] Figure 6 the oval-shaped maxillary dental arch form and the sharp round-shaped mandibular dental arch form of the II C stage provided by the embodiment of the present application;

[0033] Figure 7 the square round-shaped mandibular dental arch form and the oval-shaped mandibular dental arch form of the III C stage provided by the embodiment of the present application;

[0034] Figure 8 the sharp round-shaped maxillary dental arch form and the square round-shaped maxillary dental arch form of the III A stage provided by the embodiment of the present application;

[0035] Figure 9 the oval-shaped maxillary dental arch form and the sharp round-shaped mandibular dental arch form of the III A stage provided by the embodiment of the present application;

[0036] Figure 10 the square round-shaped mandibular dental arch form and the oval-shaped mandibular dental arch form of the III A stage provided by the embodiment of the present application;

[0037] Figure 11 the sharp round-shaped maxillary dental arch form and the square round-shaped maxillary dental arch form of the III B stage provided by the embodiment of the present application;

[0038] Figure 12 the oval-shaped maxillary dental arch form and the sharp round-shaped mandibular dental arch form of the III B stage provided by the embodiment of the present application;

[0039] Figure 13 the square round-shaped mandibular dental arch form and the oval-shaped mandibular dental arch form of the III B stage provided by the embodiment of the present application;

[0040] Figure 14 the sharp round-shaped maxillary dental arch form and the square round-shaped maxillary dental arch form of the III C stage provided by the embodiment of the present application;

[0041] Figure 15 the oval-shaped maxillary dental arch form and the sharp round-shaped mandibular dental arch form of the III C stage provided by the embodiment of the present application;

[0042] Figure 16 the square round-shaped mandibular dental arch form and the oval-shaped mandibular dental arch form of the III C stage provided by the embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0044] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common embodiment, or an embodiment that is independent of other embodiments. One of ordinary skill in the art will readily recognize from the disclosure herein, that embodiments of the present application can be combined, combined and permuted with other embodiments.

[0045] The terms“first,”“second,”“third,” and“fourth” and the like in the specification and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms“comprise,”“include,”“have,” and“contain” or variations thereof, as used in the specification and in the claims, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises, includes, has, or contains an element or a plurality of elements does not require the presence of the element or elements, but can optionally be present. In addition, the term“coupled” and variations thereof, as used in the specification and claims, indicate a connection, an attachment, a communication, a coupling, an interaction, or a link between or among two or more elements, which can be direct or indirect.

[0046] The purpose of the present application is to provide a construction method of normal dental arch standard morphology and application graphics of children, which can investigate the occlusal development of children in the mixed dentition and permanent dentition stages, and screen out normal children in the mixed dentition and permanent dentition stages according to preset inclusion and exclusion criteria. The purpose of the present application is to provide a construction method of normal dental arch standard morphology and application graphics of children, which can investigate the occlusal development of children in the mixed dentition and permanent dentition stages, and screen out normal children in the mixed dentition and permanent dentition stages according to preset inclusion and exclusion criteria. The model is measured by artificial intelligence to obtain the actual size data average of the dental arch of Chinese children, and to provide a reference for early diagnosis and treatment of malocclusion of children. The purpose of the present application is to provide a construction method of normal dental arch standard morphology and application graphics of children, which can investigate the occlusal development of children in the mixed dentition and permanent dentition stages, and screen out normal children in the mixed dentition and permanent dentition stages according to preset inclusion and exclusion criteria.

[0047] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0048] Figure 1 The method flowchart provided by the embodiment of the present application is shown in the figure, and the present application provides a construction method of normal dental arch standard morphology and application graphics of children, which comprises: Figure 1 The method flowchart provided by the embodiment of the present application is shown in the figure, and the present application provides a construction method of normal dental arch standard morphology and application graphics of children, which comprises:

[0049] Step 100: Investigate the occlusal development of children in the mixed dentition and permanent dentition stages, and screen out normal children in the mixed dentition and permanent dentition stages according to preset inclusion and exclusion criteria. The purpose of the present application is to provide a construction method of normal dental arch standard morphology and application graphics of children, which can investigate the occlusal development of children in the mixed dentition and permanent dentition stages, and screen out normal children in the mixed dentition and permanent dentition stages according to preset inclusion and exclusion criteria. The model is measured by artificial intelligence to obtain the actual size data average of the dental arch of Chinese children, and to provide a reference for early diagnosis and treatment of malocclusion of children.

[0050] Step 200: Data extraction is performed according to the individual normal dental arch model to obtain dental arch point cloud data. The model is measured by artificial intelligence to obtain the actual size data average of the dental arch of Chinese children, and to provide a reference for early diagnosis and treatment of malocclusion of children.

[0051] Step 300: Morphological fitting is performed according to the dental arch point cloud data to obtain a dental arch morphological fitting curve.

[0052] Step 400: performing cluster analysis according to the dental arch shape fitting curve to obtain standard dental arch and basal arch shape curve;

[0053] Step 500: drawing application graph of normal growth and development of children's dental arch according to the standard dental arch and basal arch shape curve.

[0054] Preferably, the inclusion and exclusion criteria include inclusion rules and exclusion rules.

[0055] The inclusion rules include mixed dentition and early permanent dentition , physical health, no obvious abrasion of dental tissue, healthy periodontal and dental tissue, no orthodontic history, no crown restoration in the oral cavity, no conical teeth, fused teeth deformity, bilateral molar class I occlusion at centric , class I soft tissue profile, basically flat upper and lower dental arch, less than 2mm of crowding degree, less than 1mm of dental arch space, normal overbite and overjet relationship.

[0056] Preferably, the exclusion rules include systemic disease and genetic disease history, history of maxillofacial trauma, systemic or facial development abnormalities, untreated upper airway disease, oral cavity bad habits, oral cavity orthodontic, restoration treatment history or maxillofacial surgery history, deciduous tooth caries or permanent tooth caries, deep caries or interproximal caries.

[0057] Specifically, 2056 children aged 5-13 years old in Chengdu area at mixed dentition and early permanent dentition stage were investigated for occlusal development, and individual normal dental models meeting the inclusion and exclusion criteria were selected for further measurement research. The inclusion and exclusion criteria are as follows: inclusion criteria: mixed dentition and early permanent dentition (stage: Hellman occlusal development stages IIC, IIIA, IIIB, IIIC); physical health; no obvious abrasion of dental tissue, healthy periodontal and dental tissue; no orthodontic history, no crown restoration in the oral cavity. No conical teeth, fused teeth and other deformities. Individual normal occlusion at centric ; bilateral molar class I occlusion; class I soft tissue profile; basically flat upper and lower dental arch; less than 2mm of crowding degree, less than 1mm of dental arch space (mixed dentition period for space prediction, according to Moyers prediction method). Normal overbite and overjet relationship. Exclusion criteria: systemic disease and genetic disease history, history of maxillofacial trauma, systemic or facial development abnormalities, untreated upper airway disease, oral cavity bad habits, oral cavity orthodontic, restoration treatment history or maxillofacial surgery history, deciduous tooth caries or permanent tooth caries, deep caries or interproximal caries.

[0058] Preferably, the morphological fitting according to the dental arch point cloud data to obtain the dental arch shape fitting curve comprises:​​

[0059] Based on 3D scanning technology, the individual normal dental arch point cloud data is obtained by using 3-Shape on the dental arch model;

[0060] According to the dental arch point cloud data, a morphological denoising closed operation and hole filling are performed, so that the tooth region of the dental arch point cloud data is a connected domain;

[0061] An iterative thinning algorithm is used to extract the connected domain to obtain a skeleton line; the skeleton line is a two-dimensional skeleton structure of the entire tooth;

[0062] Based on the coordinate matching group technology, the two-dimensional skeleton structure is restored to a three-dimensional skeleton line;

[0063] The three-dimensional skeleton line is fitted by using MATLAB software to obtain a dental arch shape fitting curve.

[0064] Specifically, as shown in Figure 2 , Figure 3 and Figure 4 , the embodiment is based on the accuracy and convenience of 3D scanning technology, and uses 3-Shape to scan the model to obtain dental arch point cloud data. Through morphological denoising closed operation, hole filling and the like, the tooth region is made into a connected domain. An iterative thinning algorithm is used to realize skeleton line extraction to obtain a two-dimensional skeleton structure of the entire tooth. Then, the coordinate matching group technology is used to restore it to a three-dimensional skeleton line. Then, MATLAB software is used to fit the curve of these points to obtain a fitting curve of the dental arch shape curve. The full dental arch data can be measured through the coordinate points.

[0065] Preferably, the dental arch shape fitting curve is subjected to cluster analysis to obtain a standard dental arch and basal arch shape curve, including:

[0066] By repeatedly grouping the collected dental arch shape fitting curves according to the measurement index, each measurement group is obtained.

[0067] The measurement groups are respectively subjected to K-mediods cluster algorithm analysis to obtain the standard dental arch and basal arch shape curve. The embodiment repeatedly groups the individual normal original measurement data according to the measurement index, and respectively performs K-mediods cluster algorithm analysis to obtain individual normal fitting shape curves of the upper and lower dental arches of children.

[0068] In addition, as shown in Figures 5 to 16 , the embodiment has completed the individual normal dental arch shape curves of the replacement tooth period and the initial permanent tooth period in Chengdu area. The child dental arch form analysis draws standard dental arch and basal arch form curves and application graphs of normal growth and development of the child dental arch, wherein three dental arch forms (pointed round, oval, square round) and four development stages (IIC stage, IIIA stage, IIIB stage and IIIC stage) are included.

[0069] The embodiment is the first standard form and application graph of the child dental arch and basal arch in China, and is the first standard form and application graph of the normal growth and development of the child dental arch in China; in the embodiment, the comprehensive form of pointed round, oval and square round of the child dental arch and basal arch in different growth and development stages in China is covered.

[0070] The beneficial effects of the present application are as follows:

[0071] The present application investigates the occlusal development of the replacement tooth period and permanent tooth period of children in Chengdu region, and at the same time, screens out normal children and children with malocclusion. The present application investigates the occlusal development of the replacement tooth period and permanent tooth period of children in Chengdu region, and at the same time, screens out normal children and children with malocclusion. The model is measured by artificial intelligence in terms of the dental arch and basal arch form, and the average value of the actual form size data of the child dental arch in China is obtained, which provides a reference for the early diagnosis and correction of child malocclusion. The present application investigates the occlusal development of the replacement tooth period and permanent tooth period of children in Chengdu region, and at the same time, screens out normal children and children with malocclusion.

[0072] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments; the same and similar parts between various embodiments can be referred to each other.

[0073] The principles and implementation modes of the present application are described by using specific examples in the present application; the above description of the embodiments is only used to help understand the method and core idea of the present application; meanwhile, according to the idea of the present application, the specific implementation mode and application range can be changed by those skilled in the art. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method for constructing the standard morphology and application diagram of a normal dental arch in children, characterized in that, include: A sampling survey was conducted on the occlusal development of several children in the mixed dentition period and early permanent dentition stage, and individual normal occlusal models were obtained based on the occlusal development and the preset inclusion and exclusion criteria. Data was extracted from the individual normal dental models to obtain dental point cloud data. Based on the dental point cloud data, morphological fitting is performed to obtain the dental arch morphological fitting curve; Cluster analysis was performed based on the dental arch morphology fitting curves to obtain the standard dental arch and basal bone arch morphology curves; Based on the standard dental arch and basal bone arch morphology curves, draw application diagrams of normal growth and development of the dental arch in children; Based on the dental point cloud data, morphological fitting is performed to obtain the dental arch morphology fitting curve, including: Based on 3D scanning technology, 3-Shape was used to perform 3D scanning on the individual normal dental models to obtain dental point cloud data. Morphological denoising and hole filling are performed on the dental point cloud data to make the tooth region of the dental point cloud data a connected domain. An iterative thinning algorithm is used to extract the connected components to obtain skeleton lines; the skeleton lines are the two-dimensional skeleton structure of the entire tooth. Based on coordinate matching group technology, the two-dimensional skeleton structure is restored to a three-dimensional skeleton line; The three-dimensional skeleton line was fitted using MATLAB software to obtain the dental arch morphology fitting curve.

2. The method for constructing the standard morphology and application diagram of a normal dental arch in children according to claim 1, characterized in that, The inclusion and exclusion criteria include: inclusion rules and exclusion rules; The inclusion criteria include: mixed dentition and early permanent dentition; good physical health; no obvious wear on tooth structure, and healthy periodontal and dental tissues; no history of orthodontics, and no crown restorations in the oral cavity; no conical teeth or fused teeth malocclusions; Class I occlusion of bilateral molars during centric dentition, Class I soft tissue profile, basically flat upper and lower dentition, crowding less than 2 mm, interdental spaces less than 1 mm, and normal overbite and overjet relationships.

3. The method for constructing the standard morphology and application diagram of a normal dental arch in children according to claim 2, characterized in that, The exclusion criteria include: history of systemic diseases and genetic diseases; history of maxillofacial trauma; systemic or facial developmental abnormalities; untreated upper airway diseases; bad oral habits; history of orthodontic or restorative treatment or maxillofacial surgery; caries in deciduous teeth or moderate, deep, or proximal caries in permanent teeth.

4. The method for constructing the standard morphology and application diagram of a normal dental arch in children according to claim 1, characterized in that, The step of performing cluster analysis based on the dental arch morphology fitting curve to obtain standard dental arch and basal bone arch morphology curves includes: By repeatedly grouping the collected dental arch morphology fitting curves according to different measurement indicators, various measurement groups are obtained; K-mediods clustering algorithm analysis was performed on each of the measurement groups to obtain the morphological curves of the standard dental arch and the basal bone arch.

Images