| Autor: |
Wang, Dongcai, Li, Boxiu, Xu, Yi, Dong, Xingtao, Jiang, Xianfeng, Wu, Jianlei, Liu, Yunfeng |
| Předmět: |
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| Zdroj: |
Orthodontics & Craniofacial Research; Aug2023, Vol. 26 Issue 3, p364-370, 7p |
| Abstrakt: |
Objective: The objective of the study was to find the most effective retracting method for the six maxillary anterior teeth with double‐slot lingual brackets using a lever arm and miniscrew system. Methods: Six finite element models were constructed: (A) a ribbon‐wise archwire with a lever arm; (B) a ribbon‐wise archwire with a lever arm and a sectional edgewise archwire; (C) a ribbon‐wise archwire and a sectional edgewise archwire with a lever arm; (D) an edgewise archwire with a lever arm; (E) an edgewise archwire with a lever arm and a sectional ribbon‐wise archwire; and (F) an edgewise archwire and a sectional ribbon‐wise archwire with a lever arm. Initial displacements of maxillary teeth driven by a 1.5 N retraction force to the lever arm were analysed. Results: In models B, C, E and F, anterior torque loss and inter‐canine distance increases were significantly lower than that of the models without auxiliary archwires. In models C and F, the main archwire was less likely deformed. In models A, B and C, the displacement of canines in sagittal and vertical directions were less than in models D, E and F. Conclusions: The combination of edgewise and ribbon‐wise archwires in double‐slot lingual brackets effectively preserves the anterior arch shape. An edgewise archwire with lever arms on the auxiliary sectional ribbon‐wise archwire is recommended for better performance in anterior teeth retraction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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