Related Experiment Videos
Distal movement of the maxillary molars
1Boston University School of Dental Medicine, Mass 02118-2392, USA.
Summary
Distal molar movement of approximately 1 mm/month is achievable with Nickel-Titanium (NiTi) coils or wires and a modified Nance appliance, requiring minimal patient cooperation. This method may cause slight overjet increase but is effective, especially during late mixed dentition.
Area of Science:
- Orthodontics
- Biomaterials Science
Background:
- Molar distalization is a key orthodontic procedure.
- Traditional methods often require significant patient compliance or complex mechanics.
Purpose of the Study:
- To evaluate the efficacy of intra-arch compressed Nickel-Titanium (NiTi) coils or looped NiTi wires for distal molar movement.
- To assess anchorage loss and changes in overjet during NiTi-assisted molar distalization.
Main Methods:
- Utilized 100 gm NiTi coils or 100 gm looped NiTi wires for intra-arch force application.
- Supported the mechanism with a removable modified Nance appliance.
- Measured molar movement rate and changes in overjet.
Main Results:
- Achieved distal molar movement of approximately 1 mm/month with minimal patient cooperation.
- Observed anchorage loss leading to an increase in overjet, generally within acceptable limits.
- Demonstrated the feasibility of molar distalization at various ages, with late mixed dentition being advantageous.
Conclusions:
- Intra-arch NiTi coils or wires offer an effective, low-compliance method for distal molar movement.
- The modified Nance appliance effectively supports this mechanism.
- Late mixed dentition is an optimal period for this type of orthodontic treatment.