Effects of Clear Aligner Designs on Tooth Movement
Author Information
Author(s): Nakornnoi Theerasak, Srirodjanakul Watcharee, Chintavalakorn Rochaya, Santiwong Peerapong, Sipiyaruk Kawin
Primary Institution: Mahidol University
Hypothesis
Does clear aligner’s trimline design and extension affect orthodontic tooth movement?
Conclusion
Aligner trimline designs and extensions can significantly influence biomechanical performance and tooth movement efficacy in clear aligner treatment.
Supporting Evidence
- Aligners with straight and extended margins generally exerted higher forces and moments compared to scalloped or shorter designs.
- Extended trimlines demonstrated superior retention.
- Aligners with straight extended margins provide better control of tooth movement.
- Aligners with high trimline reduced buccal tipping of maxillary molars during arch expansion.
Takeaway
The way clear aligners are designed can change how well they move teeth. Some designs work better than others.
Methodology
A systematic review of studies published between January 2000 and August 2024, assessing the effects of aligner trimline designs on tooth movement efficacy.
Potential Biases
All included studies were assessed as having low to moderate risk of bias.
Limitations
Heterogeneity in study methodologies precluded a meta-analysis and made direct comparisons challenging.
Digital Object Identifier (DOI)
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