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Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
Published on: February 23, 2024
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Prediction of root and alveolar bone position during orthodontic therapy without additional radiation: A comparative
Zheqin Wang1, Yifan Jia1, Zhi Mao1
1Department of Orthodontics, School and Hospital of Stomatology, Jilin University, Changchun, China.
Summary
A new Expected Root and Bone Position (ERBP) model accurately simulates tooth root positions during clear aligner treatment. This radiation-sparing method reliably monitors root-bone relationships without extra imaging.
Area of Science:
- Orthodontics
- Biomedical Engineering
- Radiology
Background:
- Orthodontic treatment requires monitoring tooth root movement relative to alveolar bone.
- Traditional methods like cone-beam computed tomography (CBCT) involve radiation exposure.
- A non-invasive method for tracking root positions is needed.
Purpose of the Study:
- To propose and validate a novel Expected Root and Bone Position (ERBP) model.
- To simulate tooth root positions relative to alveolar bone during orthodontic treatment.
- To achieve this without additional radiographic exposure.
Main Methods:
- A retrospective study of 28 patients undergoing clear aligner treatment.
- Utilized intraoral scans and CBCT data from pretreatment and midtreatment.
- Constructed the ERBP model by aligning crown scans with CBCT-derived roots and bone using N-point alignment and iterative closest point algorithm.
Main Results:
- Root mean square errors for superimposition accuracy were consistently below 1 mm.
- Bland-Altman analysis indicated most differences fell within ±1.96 standard deviations.
- High reliability was demonstrated with intraclass correlation coefficients ranging from 0.814 to 0.995.
Conclusions:
- The ERBP model accurately reproduces midtreatment root positions, comparable to CBCT.
- This method offers a reliable, radiation-sparing alternative for monitoring root-bone relationships.
- The ERBP model enhances orthodontic treatment assessment by minimizing radiation exposure.
