In sliding mechanics, resistance to sliding (RS), including friction, binding, and notching, generated at a wire-bracket interface has a bearing on the force transmitted to the teeth and further influences the biomechanical behavior associated with tooth movement efficiency. Objective: This study aimed to propose and verify the insertion of a rectangular thin-walled sleeve between an archwire and a bracket to minimize the resistance effect on the biomechanical behavior of tooth movement by using the finite element (FE) method. Material and methods: A 3D FE solid model was constructed and composed of mandibular dentitions, including the surrounding tooth-supporting structures and fixed self-ligating appliances. The translation of the left mandibular canine was simulated (0.1$$mm and 0.3$$mm) from the labial side to the lingual side with or without the thin-walled sleeve by using eight kinds of archwires with various dimensions and cross-sections by FE methods. Results: FE analysis indicated that the canine’s maximum initial displacement and the highest periodontal ligament (PDL) von Mises stress were mainly influenced by the orthodontic wire and the insertion of the thin-walled sleeve. Without the thin-walled sleeve, rectangular archwires could initiate a more optimal tissue response than round archwires. However, the insertion of the thin-walled sleeve between the small round archwire and the bracket significantly presented the most optimal biological responses in all of the cases. Conclusion: FE results revealed that the insertion of a thin-walled sleeve in a small round archwire and a bracket could have a positive influence on final tooth movement.

在滑动力学中，在金属丝-支架界面处产生的滑动阻力（RS），包括摩擦，粘结和缺口，对传递到牙齿的力有影响，并进一步影响与牙齿移动效率相关的生物力学行为。目的：本研究旨在提出并验证在弓丝和支架之间插入矩形薄壁套筒的方法，以通过有限元（FE）方法将阻力对牙齿运动的生物力学行为的影响降至最低。材料和方法：构建了一个3D FE实体模型，该模型由下颌牙列组成，包括周围的牙齿支撑结构和固定的自结扎器具。模拟左下颌犬的平移（0.1$$毫米和0.3$$通过使用八种不同尺寸和横截面的弓丝，通过有限元方法从唇侧到舌侧（有或没有薄壁套管）。结果：有限元分析表明，犬的最大初始位移和最高的牙周膜（PDL）von Mises应力主要受正畸线和薄壁套管插入的影响。如果没有薄壁套管，矩形弓丝可能会比圆形弓丝引发更好的组织反应。然而，在所有情况下，在小圆形弓丝和支架之间插入薄壁套管可显着显示出最佳的生物学反应。结论：