“Comparative Evaluation of Torquing Movement of Upper Anterior Teeth Between Fixed Appliance And Clear Aligners With And Without Mini-Implants" - A FEM Study
Keywords:
torquing movement, continuous tooth movement, fixed appliance, clear aligners, mini-implant, CAT, Finite element (FE)Abstract
Objective-The aim of this study was to compare the torquing movement of the upper anterior teeth between fixed appliance and clear aligners with and without mini-implant.
Materials and Methods- It was a non-linear observational analysis study type. A CBCT scan of a healthy individual with an oversized axial inclination of the upper anterior teeth, along with extracted upper first premolars, was obtained from the CBCT center at People’s University, Bhopal.
Results: This analysis has shown that model 3- clear aligner with power ridges on labiogingival and palatoincisal region, exhibited the highest von Mises stress measured at 0.13964 MPa whereas, model 4- clear aligners with mini-implant placed distal to the lateral incisors, recorded the maximum displacement measured at 1.30E-03mm.
Conclusion: Overall, the clear aligners with auxiliaries like (power ridges and mini-implants) demonstrated more effective torque control than fixed appliances, offering a balance between force application and flexibility for controlled torque movement. In model 3, the displacement was measured at 6.61E-04 mm for the upper anterior teeth, and the individual teeth such as— the central incisors measured at 0.000749 mm, the lateral incisors measured at 0.0007295 mm, and canines measured at 0.0006415 mm, respectively. The model 4 exhibited the highest displacement, measured at 1.30E-03 mm for the total anterior teeth. The displacement values for the individual teeth as, the central incisors measured at 0.001615 mm, lateral incisors measured at 0.00146 mm, and canines measured at 0.000914 mm, respectively, were higher compared to the other models. In model 5, displayed second-highest displacement of 1.22E-03 mm for the upper anterior teeth. The central incisors measured at 0.001505 mm, the lateral incisors measured at 0.00137 mm, and the canines measured at 0.0008695 mm respectively
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References
Rauch ED. Torque and its application to orthodontics. Am J Orthod. 1959;45(11):817-830.
Cheng Y, Gao, J, Fang S, Wang W, Ma Y, Jin Z. Torque movement of the upper anterior teeth using a clear aligner in cases of extraction: a finite element study. Prog Orthod. 2022;23(1):26.
Brezniak N, Wasserstein A, Protter N. Clear aligner biomechanical limitations: anchorage and couple (torque) development. Angle Orthod. 2023;93(5):615-616.
Li N, Lei X, Cao Y, Liu L, Zhang Y, Ning Q et al. The effect of increasing the gaps between the front teeth on torque and intrusion control of the incisors for anterior retraction with clear aligners: a prospective study. BMC Oral Health. 2024;24(1):115.
Meng X, Wang C, Xu W, Wang R, Zheng L, Wang C et al. Effects of different designs of orthodontic clear aligners on the maxillary central incisors in the tooth extraction cases: a biomechanical study. BMC Oral Health. 2023;23(1):416.
Vela-Hernández A, Gutiérrez-Zubeldia L, López-García R, García-Sanz V, Paredes-Gallardo V, Gandía-Franco JL et al. One versus two anterior miniscrews for correcting upper incisor overbite and angulation: a retrospective comparative study. Prog Orthod. 2020;21(1):34.
Rajan N, Weir T, Meade MJ. Efficacy of planned moderate to severe torque changes in maxillary central incisors with the Invisalign appliance: a retrospective investigation. Am J Orthod Dentofacial Orthop. 2024;166(4):375-383.
Liaw J, Huang G, Tsai FF, Wang SH, Liao W. Torque control of maxillary anterior teeth with the double J retractor and palatal miniscrews during en masse retraction: a case report. Angle Orthod. 2022;92(4):562-572.
Xiao T, Su JY, Lei J, Zhang X, Yu J, Nie XP et al. Effectiveness of different intrusion modes of maxillary anterior teeth with mini-implants in clear aligner treatment: a three-dimensional finite element analysis. BMC Oral Health. 2024;24(1):758.
Liu L, Zhan Q, Zhou J, Kuang Q, Yan X, Zhang X et al. Effectiveness of an anterior mini-screw in achieving incisor intrusion and palatal root torque for anterior retraction with clear aligners: a finite element study. Angle Orthod 2021;91(6):794-803.
Simon M, Keilig L, Schwarze J, Jung BA, Bourauel C. Forces and moments generated by removable thermoplastic aligners: incisor torque, premolar derotation, and molar distalization. Am J Orthod Dentofacial Orthop. 2014;145(6):728-736.
Sandhya V, Arun AV, Reddy VP, Mahendra S, Chandrashekar BS, Aravind. Biomechanical effects of torquing on upper central incisor with thermoplastic aligner: a comparative three-dimensional finite element study with and without auxillaries. J Indian Orthod Soc. 2022;56(1):49-56.
Xia Q, Wang W, Wang C, Feng G, Wang C, Song J et al. Comparative assessment of orthodontic clear aligner versus fixed appliance for anterior retraction: a finite element study. BMC Oral Health. 2024;24(1):80
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