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[Finite element simulation of distally moving mandibular molars by sequence with clear aligner]
Fu-Jia Kang1, Yu-Chen Cui, Song-Qing Wang
1Stomatology Hospital of Jilin University. Changchun 130021, Jilin Province, China.
Shanghai Kou Qiang Yi Xue = Shanghai Journal of Stomatology
|April 25, 2025
Summary
Clear aligners can achieve molar distalization, but the achieved movement is less than expected. Increasing the initial distal position of molars enhances distal displacement, though appliance deformation also occurs.
Area of Science:
- Finite element analysis in orthodontics
- Biomechanical simulation of clear aligner therapy
- Orthodontic tooth movement mechanisms
Context:
- Clear aligner therapy is a popular orthodontic treatment.
- Accurate simulation of tooth movement is crucial for treatment planning.
- Understanding aligner deformation is key to predicting treatment outcomes.
Purpose:
- To develop a finite element model for simulating mandibular molar distalization using clear aligners.
- To analyze the characteristics of tooth movement and aligner deformation during distalization.
Summary:
- A finite element model was created using CBCT and oral scan data to simulate molar distalization with clear aligners.
- Simulations revealed that molars exhibited crown tilt, while adjacent teeth showed reverse tilt.
- Increased initial distal positioning of molars led to greater distal displacement, though the total movement was less than predicted.
Impact:
- Provides insights into the biomechanics of clear aligner molar distalization.
- Highlights limitations in achieving predicted tooth movement with current clear aligner technology.
- Informs the design and application of clear aligners for more effective orthodontic treatment.
