Finite Element Analysis of Anterior Teeth under Different Attachment Designs and Movement Distance

doi:10.13701/j.cnki.kqyxyj.2025.11.011

Abstract

Abstract: Objective: To study the influence of different moving distances and attachment designs on anterior teeth when the mandibular first molar was mesial moved with clear aligner. Methods: Cone beam computed tomography (CBCT) imaging data from an adult patient were selected and established physical model to simulate the mesial movement of the posterior teeth under different moving distances and attachment designs, and the influence on anterior teeth was analyzed. Results: Under different moving distances and attachment designs, the anterior teeth consistently exhibited a tendency that the crown was inclined to move to the distal side and the root to the mesial and labial sides. Both mandibular lateral incisors and canines showed lingual crown inclination. As the moving distance increased, the anterior teeth displayed a trend of intrusion, with greater intrusion observed at larger moving distances. Conclusion: Anterior anchorage is more likely to be lost as the moving distance of posterior teeth increases. Additionally, greater attachment retaining force results in stronger reaction forces on anterior teeth. The torque compensation for anterior teeth should be designed to effectively control the torque of anterior teeth during molar mesial movement.

Key words: three-dimensional finite element, movement distance, clear aligners

PAN Yan, LIU Xin, CHEN Jingchen, ZHANG Jili, HU Yanan, ZHANG Qian. Finite Element Analysis of Anterior Teeth under Different Attachment Designs and Movement Distance[J]. Journal of Oral Science Research, 2025, 41(11): 987-992.

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