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Updated: Jan 23, 2026

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Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
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Elastodontic appliance assisted fixed appliance treatment: A new two-phase protocol for extraction cases
Yong Chen1, Urban Hagg2, Colman McGrath3
11 Department of Stomatology, Medical College of Xiamen University, Xiamen, China.
Journal of Orthodontics
|June 22, 2019
Summary
A new two-phase orthodontic treatment combining an elastodontic appliance (EA) and fixed braces effectively corrected severe dental crowding and overjet. This approach achieved favorable results in a comparatively short treatment duration.
Area of Science:
- Orthodontics
- Dental Appliances
Background:
- Elastodontic appliances (EA) are common removable devices in interceptive orthodontics.
- Severe dental crowding with skeletal Class II malocclusion presents a significant treatment challenge.
Observation:
- A 13-year-old patient with severe crowding, increased overjet, and overbite was treated.
- The treatment involved four bicuspid extractions and a novel two-phase protocol.
Findings:
- Phase 1 utilized an EA with myofunctional exercises for 2 hours daily plus overnight wear.
- Phase 2 employed a fixed appliance for 10 months to resolve residual space and improve tooth angulation.
- The entire treatment duration was 14 months, yielding satisfactory improvements in overjet and dental alignment.
Implications:
- This two-phase protocol offers a potentially faster and effective solution for severe orthodontic crowding.
- Combining removable EA with fixed appliances may enhance treatment efficiency in complex cases.
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