Upper Second Molar Distalization with Clear Aligners: A Finite Element Study
Among orthodontists and scientists, in the last years, upper molar distalization has been a debated topic in the orthodontic aligner field. However, despite that few clinical studies have been published, no insights on aligners’ biomechanics regarding this movement are available. The aim of this stu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/21/7739 |
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| author | Gabriele Rossini Matteo Schiaffino Simone Parrini Ambra Sedran Andrea Deregibus Tommaso Castroflorio |
| author_facet | Gabriele Rossini Matteo Schiaffino Simone Parrini Ambra Sedran Andrea Deregibus Tommaso Castroflorio |
| author_sort | Gabriele Rossini |
| collection | DOAJ |
| description | Among orthodontists and scientists, in the last years, upper molar distalization has been a debated topic in the orthodontic aligner field. However, despite that few clinical studies have been published, no insights on aligners’ biomechanics regarding this movement are available. The aim of this study was to assess, through finite element analysis, the force system resulting in the upper arch during second maxillary molar distalization with clear aligners and variable attachments settings. The average tooth distalization was found to be 0.029, with buccal flaring of the upper incisors in all attachment configurations. The mesial deformation of the aligner was registered to be 0.2 mm on average. Different pressure areas on the interface between aligners and upper molars were registered, with the mesial attachment surface to be directly involved when present. Periodontal ligament pressure was reported to range between 67 g/cm<sup>2</sup> and 132 g/cm<sup>2</sup>. Configurations with rectangular attachments from second molar-to-canine and from first molar-to-canine present, in an in silico environment, almost equal efficiency in distalizing the upper second molar. However, attachments from the second molar to the canine are suggested to be adopted in clinical environments due to greater feasibility in everyday practice. |
| first_indexed | 2024-03-10T15:09:40Z |
| format | Article |
| id | doaj.art-1f5a0b08855247aca2e669c5f6660908 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T15:09:40Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-1f5a0b08855247aca2e669c5f66609082023-11-20T19:26:46ZengMDPI AGApplied Sciences2076-34172020-11-011021773910.3390/app10217739Upper Second Molar Distalization with Clear Aligners: A Finite Element StudyGabriele Rossini0Matteo Schiaffino1Simone Parrini2Ambra Sedran3Andrea Deregibus4Tommaso Castroflorio5Department of Orthodontics, University of Turin—Dental School, 10126 Turin, ItalyDepartment of Orthodontics, University of Turin—Dental School, 10126 Turin, ItalyDepartment of Orthodontics, University of Turin—Dental School, 10126 Turin, ItalyDepartment of Orthodontics, University of Turin—Dental School, 10126 Turin, ItalySpecialization School of Orthodontics, University of Turin—Dental School, 10126 Turin, ItalySpecialization School of Orthodontics, University of Turin—Dental School, 10126 Turin, ItalyAmong orthodontists and scientists, in the last years, upper molar distalization has been a debated topic in the orthodontic aligner field. However, despite that few clinical studies have been published, no insights on aligners’ biomechanics regarding this movement are available. The aim of this study was to assess, through finite element analysis, the force system resulting in the upper arch during second maxillary molar distalization with clear aligners and variable attachments settings. The average tooth distalization was found to be 0.029, with buccal flaring of the upper incisors in all attachment configurations. The mesial deformation of the aligner was registered to be 0.2 mm on average. Different pressure areas on the interface between aligners and upper molars were registered, with the mesial attachment surface to be directly involved when present. Periodontal ligament pressure was reported to range between 67 g/cm<sup>2</sup> and 132 g/cm<sup>2</sup>. Configurations with rectangular attachments from second molar-to-canine and from first molar-to-canine present, in an in silico environment, almost equal efficiency in distalizing the upper second molar. However, attachments from the second molar to the canine are suggested to be adopted in clinical environments due to greater feasibility in everyday practice.https://www.mdpi.com/2076-3417/10/21/7739aligner orthodonticsbiomechanicsdistalizationfinite element analysis |
| spellingShingle | Gabriele Rossini Matteo Schiaffino Simone Parrini Ambra Sedran Andrea Deregibus Tommaso Castroflorio Upper Second Molar Distalization with Clear Aligners: A Finite Element Study Applied Sciences aligner orthodontics biomechanics distalization finite element analysis |
| title | Upper Second Molar Distalization with Clear Aligners: A Finite Element Study |
| title_full | Upper Second Molar Distalization with Clear Aligners: A Finite Element Study |
| title_fullStr | Upper Second Molar Distalization with Clear Aligners: A Finite Element Study |
| title_full_unstemmed | Upper Second Molar Distalization with Clear Aligners: A Finite Element Study |
| title_short | Upper Second Molar Distalization with Clear Aligners: A Finite Element Study |
| title_sort | upper second molar distalization with clear aligners a finite element study |
| topic | aligner orthodontics biomechanics distalization finite element analysis |
| url | https://www.mdpi.com/2076-3417/10/21/7739 |
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