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Sliding mechanics in extraction cases with a bidimensional approach
1Dept. of Orthodontics, University of Ferrara, Italy.
Progress in Orthodontics
|March 17, 2007
Summary
The Bidimensional technique uses different bracket sizes for precise tooth movement, enabling controlled retraction of maxillary incisors with sliding mechanics. This orthodontic approach offers effective treatment for bimaxillary protrusion.
Area of Science:
- Orthodontics
- Biomaterials Science
Background:
- The Bidimensional technique is an advanced edgewise orthodontic method utilizing vertically slotted brackets of varying dimensions.
- This technique employs .018" x .022" brackets on incisors and .022" x .028" brackets on posterior teeth.
Observation:
- Maxillary incisor brackets are pre-programmed, facilitating controlled tooth movement.
- Sliding mechanics are utilized for all orthodontic movements, including the bodily retraction of maxillary incisors.
Findings:
- A .018" x .022" wire is used for incisor retraction, filling the bracket slot to ensure torque control with 300 gm intra-arch forces.
- In the buccal segments, the .018" x .022" wire is undersized for the canine, premolar, and molar brackets, allowing for efficient sliding mechanics.
Implications:
- The Bidimensional technique offers a method for precise torque control and bodily tooth movement in orthodontic treatment.
- This technique is demonstrated as effective in managing Class I bimaxillary protrusion cases requiring extraction.
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