Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study
Abstract Background The aim of this study is to conduct a comparative evaluation of different designs of clear aligners and examine the disparities between clear aligners and fixed appliances. Methods 3D digital models were created, consisting of a maxillary dentition without first premolars, maxill...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2024-01-01
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| Series: | BMC Oral Health |
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| Online Access: | https://doi.org/10.1186/s12903-023-03704-6 |
| _version_ | 1797355467121360896 |
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| author | Qian Xia Weixu Wang Chunjuan Wang Ge Feng Chao Wang Jinlin Song Yubo Fan |
| author_facet | Qian Xia Weixu Wang Chunjuan Wang Ge Feng Chao Wang Jinlin Song Yubo Fan |
| author_sort | Qian Xia |
| collection | DOAJ |
| description | Abstract Background The aim of this study is to conduct a comparative evaluation of different designs of clear aligners and examine the disparities between clear aligners and fixed appliances. Methods 3D digital models were created, consisting of a maxillary dentition without first premolars, maxilla, periodontal ligaments, attachments, micro-implant, 3D printed lingual retractor, brackets, archwire and clear aligner. The study involved the creation of five design models for clear aligner maxillary anterior internal retraction and one design model for fixed appliance maxillary anterior internal retraction, which were subsequently subjected to finite element analysis. These design models included: (1) Model C0 Control, (2) Model C1 Posterior Micro-implant, (3) Model C2 Anterior Micro-implant, (4) Model C3 Palatal Plate, (5) Model C4 Lingual Retractor, and (6) Model F0 Fixed Appliance. Results In the clear aligner models, a consistent pattern of tooth movement was observed. Notably, among all tested models, the modified clear aligner Model C3 exhibited the smallest differences in sagittal displacement of the crown-root of the central incisor, vertical displacement of the central incisor, sagittal displacement of the second premolar and second molar, as well as vertical displacement of posterior teeth. However, distinct variations in tooth movement trends were observed between the clear aligner models and the fixed appliance model. Furthermore, compared to the fixed appliance model, significant increases in tooth displacement were achieved with the use of clear aligner models. Conclusions In the clear aligner models, the movement trend of the teeth remained consistent, but there were variations in the amount of tooth displacement. Overall, the Model C3 exhibited better torque control and provided greater protection for posterior anchorage teeth compared to the other four clear aligner models. On the other hand, the fixed appliance model provides superior anterior torque control and better protection of the posterior anchorage teeth compared to clear aligner models. The clear aligner approach and the fixed appliance approach still exhibit a disparity; nevertheless, this study offers a developmental direction and establishes a theoretical foundation for future non-invasive, aesthetically pleasing, comfortable, and efficient modalities of clear aligner treatment. |
| first_indexed | 2024-03-08T14:12:34Z |
| format | Article |
| id | doaj.art-cf95cab08f4f4622bd97ca572703476b |
| institution | Directory Open Access Journal |
| issn | 1472-6831 |
| language | English |
| last_indexed | 2024-03-08T14:12:34Z |
| publishDate | 2024-01-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Oral Health |
| spelling | doaj.art-cf95cab08f4f4622bd97ca572703476b2024-01-14T12:40:48ZengBMCBMC Oral Health1472-68312024-01-0124111510.1186/s12903-023-03704-6Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element studyQian Xia0Weixu Wang1Chunjuan Wang2Ge Feng3Chao Wang4Jinlin Song5Yubo Fan6Stomatological Hospital of Chongqing Medical UniversityStomatological Hospital of Chongqing Medical UniversityStomatological Hospital of Chongqing Medical UniversityStomatological Hospital of Chongqing Medical UniversityStomatological Hospital of Chongqing Medical UniversityStomatological Hospital of Chongqing Medical UniversityKey Laboratory of Biomechanics and Mechanobiology, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, State Key Laboratory of Virtual Reality Technology and Systems, Ministry of Education, Beihang UniversityAbstract Background The aim of this study is to conduct a comparative evaluation of different designs of clear aligners and examine the disparities between clear aligners and fixed appliances. Methods 3D digital models were created, consisting of a maxillary dentition without first premolars, maxilla, periodontal ligaments, attachments, micro-implant, 3D printed lingual retractor, brackets, archwire and clear aligner. The study involved the creation of five design models for clear aligner maxillary anterior internal retraction and one design model for fixed appliance maxillary anterior internal retraction, which were subsequently subjected to finite element analysis. These design models included: (1) Model C0 Control, (2) Model C1 Posterior Micro-implant, (3) Model C2 Anterior Micro-implant, (4) Model C3 Palatal Plate, (5) Model C4 Lingual Retractor, and (6) Model F0 Fixed Appliance. Results In the clear aligner models, a consistent pattern of tooth movement was observed. Notably, among all tested models, the modified clear aligner Model C3 exhibited the smallest differences in sagittal displacement of the crown-root of the central incisor, vertical displacement of the central incisor, sagittal displacement of the second premolar and second molar, as well as vertical displacement of posterior teeth. However, distinct variations in tooth movement trends were observed between the clear aligner models and the fixed appliance model. Furthermore, compared to the fixed appliance model, significant increases in tooth displacement were achieved with the use of clear aligner models. Conclusions In the clear aligner models, the movement trend of the teeth remained consistent, but there were variations in the amount of tooth displacement. Overall, the Model C3 exhibited better torque control and provided greater protection for posterior anchorage teeth compared to the other four clear aligner models. On the other hand, the fixed appliance model provides superior anterior torque control and better protection of the posterior anchorage teeth compared to clear aligner models. The clear aligner approach and the fixed appliance approach still exhibit a disparity; nevertheless, this study offers a developmental direction and establishes a theoretical foundation for future non-invasive, aesthetically pleasing, comfortable, and efficient modalities of clear aligner treatment.https://doi.org/10.1186/s12903-023-03704-6Clear alignerFixed applianceFinite element analysisAnterior retractionBiomechanics |
| spellingShingle | Qian Xia Weixu Wang Chunjuan Wang Ge Feng Chao Wang Jinlin Song Yubo Fan Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study BMC Oral Health Clear aligner Fixed appliance Finite element analysis Anterior retraction Biomechanics |
| title | Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study |
| title_full | Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study |
| title_fullStr | Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study |
| title_full_unstemmed | Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study |
| title_short | Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study |
| title_sort | comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction a finite element study |
| topic | Clear aligner Fixed appliance Finite element analysis Anterior retraction Biomechanics |
| url | https://doi.org/10.1186/s12903-023-03704-6 |
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