Effect of attachment configuration and trim line design on the force system of orthodontic aligners: A finite element study on the upper central incisor

• DOI: 10.1111/ocr.12779
• Publication Date: 2024-03-09T09:14:35Z
• Authors: Tarek M. Elshazly; Christoph Bourauel; Mostafa Aldesoki; Damiano Salvatori; Abdulaziz Alhotan; Ludger Keilig; Ahmed Ghoneima
• Keywords: Trimming; Line (geometry)

Abstract Objectives To use the finite element method (FEM) to investigate effect of various attachment configurations and trimming line designs orthodontic aligners on their biomechanical performance. Method A 3D upper jaw model was imported into design software. The right central incisor tooth (Tooth 11) made mobile, its periodontal ligament (PDL) bone structures were designed. Aligners modelled with three distinct configurations: No attachment, rectangular horizontal, vertical, two designs; scalloped straight extended, a homogeneous thickness 0.6 mm. These models then an FE Simulations conducted for different movements, including facial translation, distalization, extrusion. Results Forces recorded at 1.3–2.6 N during 1.4–5.9 in 0.0–2.0 extended consistently generated higher forces than design. Attachments had no significant impact force components translation but more effective distalization combination horizontal attachments exhibited least stresses apical third highest extrusion, suggesting superior retention. Conclusions Rectangular offer limited benefits can intensify load are crucial generation Horizontal preferred over vertical options. Additionally, trim enhances control movement replace certain cases. Clinical Relevance findings provide evidence optimal protocol guide clinical practice planning diverse teeth movements. emphasis is influence utilization specific aligner lines enhance movement.