Differences in Stress Distribution and Initial Displacement for Correction of Mesiopalatal Rotation of Maxillary First Molar Using Toe-In Bend Method: A Three-Dimensional Finite Element Analysis | ||
| Egyptian Orthodontic Journal | ||
| Volume 67, Issue 1, June 2025, Pages 138-145 PDF (966.05 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eos.2024.328180.1127 | ||
| Authors | ||
| Endiyanto W Nugroho* ; Pudyani S Pinandi* ; Karunia Dyah* | ||
| Department of Orthodontics, Dentistry Faculty, Gadjah Mada University, Yogyakarta, Indonesia | ||
| Abstract | ||
| Aim: To analyze differences in stress distribution and initial displacement for correction of mesiopalatal rotation of maxillary first molar using toe-in bend method with varying angles through three-dimensional finite element analysis. Methods: A three-dimensional finite element model of the maxilla with orthodontic appliances was constructed using CBCT scans. Toe-in bends with angles of 90°, 115°, 130°, 145°, 160°, and 175° were simulated on a 0.016" stainless steel wire. Stress distribution in the tooth, periodontal ligament, and alveolar bone, as well as initial displacement along X, Y, and Z axes, were analyzed using ANSYS software. Statistical analysis was performed using Kruskal-Wallis and post-hoc tests (p<0.05). Results: Significant differences in stress distribution and initial displacement were found between angle groups (p<0.05). Stress and displacement decreased as toe-in bend angle increased. Angles of 145°-175° produced more favorable biomechanical effects. Conclusion: There are differences in the stress distribution on the teeth, periodontal ligament, and alveolar bone, as well as initial displacement along the X, Y, and Z axes, which are linear in nature. As the angle increases, the distribution of stress and displacement decreases. | ||
| Keywords | ||
| Keywords: Maxillary molar rotation; Toe-in bend; Finite element analysis; Stress distribution; Initial displacement | ||
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