The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulation
Abstract Introduction Long-term simulation of tooth movement is crucial for clear aligner (CA) treatment. This study aimed to investigate the effect of maxillary molar distalization with CA via an automatic staging simulation. Method A finite-element method (FEM) model of maxillary dentition, period...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-05-01
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| Series: | Progress in Orthodontics |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40510-023-00468-1 |
| _version_ | 1797822585956728832 |
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| author | Bochun Mao Yajing Tian Yujia Xiao Jing Li Yanheng Zhou |
| author_facet | Bochun Mao Yajing Tian Yujia Xiao Jing Li Yanheng Zhou |
| author_sort | Bochun Mao |
| collection | DOAJ |
| description | Abstract Introduction Long-term simulation of tooth movement is crucial for clear aligner (CA) treatment. This study aimed to investigate the effect of maxillary molar distalization with CA via an automatic staging simulation. Method A finite-element method (FEM) model of maxillary dentition, periodontal ligaments, attachments, and corresponding CA was established, and a prescribed 2-mm distalization with 0.1 mm each step of the second molar was simulated. The long-term tooth movement under orthodontic force was simulated with an iterative computation method. The morphologic changes of CA during staging were simulated with the thermal expansion method. Results Twenty steps of molar distalization were simulated. Significant distal tilting of the second molar was revealed, along with the proclination of anterior teeth, which caused the ‘reversed bow effect’. For the second molar, 4.63°distal tilting at the 20th step was revealed. The intrusion of the incisors and the second molar were 0.43 mm, 0.39 mm, and 0.45 mm, respectively, at step 20. All the anterior teeth showed a proclination of approximately 1.41°–2.01° at the 20th step. The expression rate of the designed distalization of the second molar was relatively low (approximately 68%) compared to the high efficacy of interdental space opening between molars with CA (approximately 89%). Conclusion A novel method of simulating long-term molar distalization with CA with FEM was developed. The FEM results suggested distal tilting of the second molar and the proclination of anterior teeth during the molar distalization. |
| first_indexed | 2024-03-13T10:11:16Z |
| format | Article |
| id | doaj.art-21ecd418be8b4de78db3c527f063f796 |
| institution | Directory Open Access Journal |
| issn | 2196-1042 |
| language | English |
| last_indexed | 2024-03-13T10:11:16Z |
| publishDate | 2023-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Progress in Orthodontics |
| spelling | doaj.art-21ecd418be8b4de78db3c527f063f7962023-05-21T11:28:41ZengSpringerOpenProgress in Orthodontics2196-10422023-05-012411910.1186/s40510-023-00468-1The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulationBochun Mao0Yajing Tian1Yujia Xiao2Jing Li3Yanheng Zhou4Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of HealthDepartment of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of HealthDepartment of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of HealthDepartment of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of HealthDepartment of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of HealthAbstract Introduction Long-term simulation of tooth movement is crucial for clear aligner (CA) treatment. This study aimed to investigate the effect of maxillary molar distalization with CA via an automatic staging simulation. Method A finite-element method (FEM) model of maxillary dentition, periodontal ligaments, attachments, and corresponding CA was established, and a prescribed 2-mm distalization with 0.1 mm each step of the second molar was simulated. The long-term tooth movement under orthodontic force was simulated with an iterative computation method. The morphologic changes of CA during staging were simulated with the thermal expansion method. Results Twenty steps of molar distalization were simulated. Significant distal tilting of the second molar was revealed, along with the proclination of anterior teeth, which caused the ‘reversed bow effect’. For the second molar, 4.63°distal tilting at the 20th step was revealed. The intrusion of the incisors and the second molar were 0.43 mm, 0.39 mm, and 0.45 mm, respectively, at step 20. All the anterior teeth showed a proclination of approximately 1.41°–2.01° at the 20th step. The expression rate of the designed distalization of the second molar was relatively low (approximately 68%) compared to the high efficacy of interdental space opening between molars with CA (approximately 89%). Conclusion A novel method of simulating long-term molar distalization with CA with FEM was developed. The FEM results suggested distal tilting of the second molar and the proclination of anterior teeth during the molar distalization.https://doi.org/10.1186/s40510-023-00468-1Finite-element methodLong-term simulationClear alignerMolar distalization |
| spellingShingle | Bochun Mao Yajing Tian Yujia Xiao Jing Li Yanheng Zhou The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulation Progress in Orthodontics Finite-element method Long-term simulation Clear aligner Molar distalization |
| title | The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulation |
| title_full | The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulation |
| title_fullStr | The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulation |
| title_full_unstemmed | The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulation |
| title_short | The effect of maxillary molar distalization with clear aligner: a 4D finite-element study with staging simulation |
| title_sort | effect of maxillary molar distalization with clear aligner a 4d finite element study with staging simulation |
| topic | Finite-element method Long-term simulation Clear aligner Molar distalization |
| url | https://doi.org/10.1186/s40510-023-00468-1 |
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