Comparison of the frictional resistance of 3D-printed brackets and conventional brackets.

IF 1.7 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of oral science Pub Date : 2026-04-16 Epub Date: 2026-03-13 DOI:10.2334/josnusd.25-0321

Ahmet Yıldırım, Ali Kiki

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引用次数: 0

Abstract

Purpose: This study attempted to compare frictional resistance among three-dimensional (3D) printed resin brackets, and also with conventional metal and ceramic brackets under in vitro conditions.

Methods: 3D bracket designs were created digitally and converted to stereolithography (STL) file format. Subsequently, brackets were produced using a FormLabs 3B+ printer using Permanent Crown and Biomed Clear resins. Half of these 3D-printed brackets were aged by thermal cycling, and then the frictional resistances of aged resin, non-aged resin, ceramic and metal brackets were measured using a universal testing machine.

Results: Shrinkage was 5.41% for Permanent Crown brackets and 7.84% for Biomed Clear brackets. Resin-based brackets produced by 3D printing demonstrated the highest frictional resistance. After the aging process, the frictional resistance of the 3D-printed brackets was reduced. Frictional resistance was lowest for the stainless steel wire and stainless steel bracket combination, and highest for the beta-titanium wire and resin bracket combinations (P < 0.05).

Conclusion: As the Permanent Crown resin bracket demonstrated frictional resistance comparable to ceramic brackets after aging, advances in more durable 3D printing materials with improved surface properties are expected to further enhance the clinical applicability of 3D-printed brackets.

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3d打印支架与传统支架的摩擦阻力比较。

目的：本研究试图比较三维（3D）打印树脂托槽与传统金属和陶瓷托槽在体外条件下的摩擦阻力。方法：三维支架设计以数字方式创建，并转换为立体光刻（STL）文件格式。随后，使用FormLabs 3B+打印机制作支架，使用Permanent Crown和Biomed Clear树脂。将其中一半的3d打印支架进行热循环老化，然后使用万能试验机测量老化树脂、未老化树脂、陶瓷和金属支架的摩擦阻力。结果：恒冠托槽的收缩率为5.41%，Biomed Clear托槽的收缩率为7.84%。由3D打印生产的树脂基支架显示出最高的摩擦阻力。经过时效处理后，3d打印支架的摩擦阻力降低。不锈钢丝与不锈钢托槽组合的摩擦阻力最小，钛丝与树脂托槽组合的摩擦阻力最大（P < 0.05）。结论：由于永久冠树脂支架在老化后的摩擦阻力与陶瓷支架相当，3D打印材料的发展和表面性能的改善有望进一步提高3D打印支架的临床适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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