Clear dental aligners are commonly manufactured using thermoplastic materials such as Duran and Durasoft. Using conventional thermoforming methods there are inherent disadvantages including time consumption and poor geometrical accuracies that often occur. The use of digital technologies and 3D printing techniques for producing dental aligners is often preferred where possible. Innovation in 3D printing has resulted in bio-compatible materials becoming more readily available, including Formlabs Dental LT Clear resin, which is a 3D printable and Class IIa bio-compatible material. In this paper, we investigate the difference between thermoplastic materials such as Scheu-Dental Duran and Durasoft and 3D printed Dental LT using Finite Element Analysis (FEA)/Finite Element Modelling (FEM) in a dental aligner case based on an analysis of von Mises stress distribution at molars, incisors and canines for a total of 33161 nodes using Finite Element Analysis (FEA). Maximum von Mises stress distribution at all of the sections under the action of non-linear compressive forces equivalent to human biting force (up to 600 N) were discovered to vary within a range of 0.2–7.7% for Dental LT resin. The Duran and Durasoft cases were comparable, thereby widening the scope for the use of Dental LT in various dentistry applications, including clear aligners.

透明牙齿矫正器通常使用诸如Duran和Durasoft的热塑性材料制造。使用常规的热成型方法存在固有的缺点，包括时间消耗和经常发生的不良几何精度。在可能的情况下，通常首选使用数字技术和3D打印技术来生产牙齿矫正器。3D打印方面的创新使生物相容性材料变得更容易获得，包括Formlabs Dental LT Clear树脂，这是一种3D可印刷和IIa类生物相容性材料。在本文中，我们基于对牙齿的von Mises应力分布的分析，研究了在牙科矫直机中使用有限元分析（FEA）/有限元建模（FEM）的热塑性材料（例如Scheu-Dental Duran和Durasoft和3D打印Dental LT）之间的差异，使用有限元分析（FEA）进行总共33161个结点的门牙和犬齿。对于牙科LT树脂，在等效于人类咬力（最大600 N）的非线性压缩力的作用下，所有截面上的最大von Mises应力分布均在0.2-7.7％的范围内变化。Duran和Durasoft的案例具有可比性，从而扩大了Dental LT在各种牙科应用（包括透明对准器）中的使用范围。使用有限元分析（FEA）进行总共33161个节点的切牙和犬齿。对于牙科LT树脂，在等效于人类咬合力（最大600 N）的非线性压缩力的作用下，所有截面上的最大von Mises应力分布均在0.2-7.7％的范围内变化。Duran和Durasoft的案例具有可比性，从而扩大了Dental LT在各种牙科应用（包括透明对准器）中的使用范围。使用有限元分析（FEA）进行总共33161个节点的切牙和犬齿。对于牙科LT树脂，在等效于人类咬合力（最大600 N）的非线性压缩力的作用下，所有截面上的最大von Mises应力分布均在0.2-7.7％的范围内变化。Duran和Durasoft的案例具有可比性，从而扩大了Dental LT在包括透明矫正器在内的各种牙科应用中的使用范围。