Alveolar bone thickness and height changes following incisor retraction treatment with microimplants

Area of Science:

• Orthodontics
• Dental Implantology
• Periodontology

Background:

• Incisor retraction is a common orthodontic procedure.
• Microimplants offer skeletal anchorage for controlled tooth movement.
• Alveolar bone remodeling is a critical factor in orthodontic stability.

Purpose of the Study:

• To assess alveolar bone remodeling after microimplant-assisted incisor retraction.
• To investigate the correlation between incisor crown/root movement and alveolar bone changes.

Main Methods:

• 24 patients with bialveolar protrusion underwent incisor retraction using microimplants.
• Cone-beam computed tomography (CBCT) evaluated alveolar bone thickness (ABT) and vertical bone level (VBL) before and after treatment.
• Pearson correlation coefficients analyzed relationships between tooth movement and bone changes.

Main Results:

• Significant changes in VBL and ABT (labial, lingual) were observed post-treatment.
• Alveolar bone changes differed significantly between root movement groups, but not crown movement groups.
• Root movement demonstrated significant correlations with alveolar bone remodeling.

Conclusions:

• Microimplant-aided incisor retraction leads to notable alveolar bone height and thickness alterations.
• Root movement is a key predictor of alveolar bone remodeling during incisor retraction.
• Understanding these bone changes is crucial for stable orthodontic outcomes.