TITLE:
The Finite Element Analysis of Optimal Orthodontic Force for Canine Distalization with Long-Arm Brackets
AUTHORS:
Zhidan Zhu, Xiaojing Sun, Bin Lu, Qijie Shi, Yun Tang, Siyu Zou, Qian Jiang
KEYWORDS:
Orthodontic Force, Tooth Movement, Finite Element Analysis, Periodontal Ligament Stress
JOURNAL NAME:
Journal of Biosciences and Medicines,
Vol.13 No.1,
January
21,
2025
ABSTRACT: Objective: To compare the stress distribution in the periodontal ligament under different orthodontic forces during canine distalization using long-arm brackets, and to determine the optimal force value for this device in orthodontic treatment. Methods: A finite element model was constructed after extracting the mandibular first premolar, and a long-arm bracket with a traction height of 6 mm was placed on the labial side of the mandibular canine. Three working conditions of 50 g, 100 g, and 150 g were simulated, and the magnitude and distribution of von Mises stress in the periodontal ligament were compared for each condition. Results: The maximum von Mises stress in the periodontal ligament was 0.013281 MPa in the 50 g condition, 0.02536 MPa in the 100 g condition, and 0.035549 MPa in the 150 g condition. As the orthodontic force increased, the stress distribution area in the periodontal ligament also expanded. Conclusion: A 100 g orthodontic force is the most suitable when using long-arm brackets, providing a relatively uniform stress distribution in the periodontal ligament and keeping the stress within a reasonable range.