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Effect of 3D anchorage attachment on the alleviating tipping/extrusion of premolars for en-mass distalization of maxillary molars with clear aligners:A finite element study

引用

Medicine in Novel Technology and Devices 2023年第2期18卷 272-280页

作者： Lurong Jia Chunjuan Wang Yao He Chao Wang Antonio Apicella Jinlin Song Yubo Fan Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences ChongqingChina Stomatological Hospital of Chongqing Medical University ChongqingChina Key Laboratory of Biomechanics and Mechanobiology Ministry of EducationBeijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringSchool of Engineering MedicineBeihang UniversityBeijingChina Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education ChongqingChina Polytechnique School of Engineering and Base Science University of CampaniaItaly

This study aimed to explore the optimal invisible orthodontic force system during the en-mass distalization of two maxillary molars to minimize the side effect of anchorage loss by changing the direction of the application of the orthodontic force system.A high bio-fidelity 3D finite element model including maxilla,periodontal ligament,dentition,clear aligner,3D anchorage attachment and mini-implant was *** lengths of lateral hooks of 3D-printed anchorage attachments and mini-implant positions into the palatal alveolus were considered.A 200 g distal force was applied to the lateral hooks of different horizontal lengths(3.26 mm,6.52 mm and 9.78 mm)with the mini-implant as the application *** ABAQUS software,orthodontic tooth movements under 12 different clinical treatment designs were analyzed and *** 3D anchorage attachment enhanced the anchorage of anterior teeth and alleviated the tipping/extrusion of *** contrast to without clear aligners,length of the lateral hook had a negligible effect on both mesial tipping and buccal tipping with clear aligners,which could then be *** change in mesial tipping was less and nearly remained constant despite of the different heights of the *** 3D anchorage attachment assisted clear aligner can avoid the side effects of anterior tooth proclination caused by insufficient *** length of the lateral hook,and height of the mini-implant in this invisible orthodontic force system hardly affects the tooth movement of anchorage *** aligners can effectively control the rotation and tipping of anchorage units caused by 3D anchorage attachment.

关键词： Clear aligner Orthodontics 3D printing Three-dimensional finite element Attachments reinforced anchorage

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