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Pressure Differences from Clear Aligner Movements Assessed by Pressure Sensors
Ho-Jung Son1, Kyeong-Ho Lee2, Ji-Young Sim1
1Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea.
Biomed Research International
|April 8, 2020
Summary
Clear aligner pressure for orthodontic tooth movement requires significant material displacement. Movements of 0.25mm and 1.00mm did not yield distinct pressure changes, indicating a need for larger increments.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Device Engineering
Background:
- Clear aligners are widely used for orthodontic treatment.
- Optimizing aligner design is crucial for effective tooth movement.
- Understanding the relationship between aligner movement and applied pressure is essential.
Purpose of the Study:
- To assess pressure variations in clear aligners at different incremental movements.
- To determine the minimum effective movement for achieving orthodontic pressure.
Main Methods:
- 3D printing was used to create the clear aligner model.
- Vacuum forming with 0.75mm thermoplastic sheets produced the aligners.
- A pressure sensor evaluated pressure changes during incremental movements (0.25mm, 1.00mm).
Main Results:
- Pressure sensor readings were indistinguishable between 0mm, 0.25mm, and 1.00mm movements.
- The sensor could not differentiate pressure variations for small incremental movements.
Conclusions:
- A clear aligner movement exceeding 0.50mm is necessary to generate appropriate orthodontic pressure.
- Larger incremental movements are recommended for effective clear aligner therapy.
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