Three-dimensional finite element analysis of extrusion of the maxillary canine during orthodontic treatment with invisible aligner without brackets

doi:10.3969/j.issn.2095-4344.1609

Abstract

Abstract:

BACKGROUND: With the advancement of science and technology, invisible aligner without brackets have emerged. However, this new type of digital orthodontic technology is rarely reported on its biomechanics.

OBJECTIVE: By the use of rectangular attachments of different sizes and different bonding positions, to obtain different force of canines and the stress supporting of periodontal tissue during the extrusion movement, providing reference for the clinical use of rectangular attachment in the orthodontic treatment of low canine tooth.

METHODS: A three-dimensional finite element model of appliance-attachments-canine-periodontium-cancellous bone-cortical bone was established based on the scan data of the isolated canine. The attachments were set in different directions (vertical, horizontal), sizes (3, 4, 5 mm in height) and positions (in the occlusal side of the crown center, in the gingival side of the crown center). The 0.25-mm forced occlusal displacement was loaded to observe the deformation and equivalent stress of the tooth and periodontal membrane.

RESULTS AND CONCLUSION: (1) If the size of rectangular attachment increases, the force of the tooth will grow in a certain range and the tooth will have better effect of extrusion with a larger level of tilt motion in other directions. (2) The extrusion effect of the horizontal attachment is better than that of the vertical attachment, which is more difficult to have distal incline, but is prone to lingual incline.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Orthodontic Appliances, Finite Element Analysis, Cuspid, Tissue Engineering

CLC Number:

R459.9

R318.01

Tian Shancan, Bai Rui, Xu Xiaomei, Huang Yue, Zhang Li, Yu Xingyue, Cheng Qian . Three-dimensional finite element analysis of extrusion of the maxillary canine during orthodontic treatment with invisible aligner without brackets[J]. Chinese Journal of Tissue Engineering Research, 2019, 23(10): 1489-1495.

Figures/Tables 11

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