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Stress and Strain Created Around Miniscrews during En Masse Retraction - A Finite Element Method
S R Santhosh Kumar1, Neeral Barthunia1, Bhavna Barthunia2
1Department of Orthodontics and Dentofacial Orthopaedics, Daswani Dental College and Research Centre, Kota, Rajasthan, India.
Journal of Pharmacy & Bioallied Sciences
|September 16, 2022
Summary
Temporary anchorage devices (TADs) are effective for en masse anterior tooth retraction. This study found higher stress and strain in TADs compared to surrounding bone, indicating their load-bearing capacity.
Area of Science:
- Orthodontics
- Biomaterials Engineering
- Dental Imaging
Background:
- En masse retraction of anterior teeth presents significant anchorage challenges in orthodontics.
- Temporary anchorage devices (TADs) offer an effective solution for achieving stable anchorage during such complex tooth movements.
Purpose of the Study:
- To analyze the stress and strain distribution around miniscrews used for en masse anterior tooth retraction.
- To evaluate the load-bearing capacity of miniscrews by assessing stress and strain using finite element analysis.
Main Methods:
- Cone beam computed tomography (CBCT) data was acquired at two distinct time points during orthodontic treatment.
- Finite element analysis (FEA) was performed on the CBCT data to simulate and quantify stress and strain around the miniscrews.
- Stress and strain values were compared between the temporary anchorage devices (TADs) and the surrounding cortical and alveolar bone.
Main Results:
- The finite element analysis revealed elevated levels of stress and strain concentrated around the miniscrews.
- Quantitative analysis demonstrated that stress and strain were significantly higher in the temporary anchorage devices (TADs) compared to the adjacent cortical and alveolar bone.
Conclusions:
- Miniscrews used in orthodontic anchorage experience substantial stress and strain during en masse anterior tooth retraction.
- The findings suggest that temporary anchorage devices (TADs) possess a considerable capacity to withstand these biomechanical forces, validating their clinical efficacy.
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