Paradowska-Stolarz Anna, Wezgowiec Joanna, Malysa Andrzej, Wieckiewicz Mieszko
Division of Dentofacial Anomalies, Department of Maxillofacial Orthopedics and Orthodontics, Wroclaw Medical University, 50-425 Wroclaw, Poland.
Department of Experimental Dentistry, Wroclaw Medical University, 50-425 Wroclaw, Poland.
J Funct Biomater. 2023 May 25;14(6):295. doi: 10.3390/jfb14060295.
Three-dimensional printing has become incorporated into various aspects of everyday life, including dentistry. Novel materials are being introduced rapidly. One such material is Dental LT Clear by Formlabs, a resin used for manufacturing occlusal splints, aligners, and orthodontic retainers. In this study, a total of 240 specimens, comprising two shapes (dumbbell and rectangular), were evaluated through compression and tensile tests. The compression tests revealed that the specimens were neither polished nor aged. However, after polishing, the compression modulus values decreased significantly. Specifically, the unpolished and nonaged specimens measured 0.87 ± 0.02, whereas the polished group measured 0.086 ± 0.03. The results were significantly affected by artificial aging. The polished group measured 0.73 ± 0.05, while the unpolished group measured 0.73 ± 0.03. In contrast, the tensile test proved that the specimens showed the highest resistance when the polishing was applied. The artificial aging influenced the tensile test and reduced the force needed to damage the specimens. The tensile modulus had the highest value when polishing was applied (3.00 ± 0.11). The conclusions drawn from these findings are as follows: 1. Polishing does not change the properties of the examined resin. 2. Artificial aging reduces resistance in both compression and tensile tests. 3. Polishing reduces the damage to the specimens in the aging process.
三维打印已融入日常生活的各个方面，包括牙科领域。新型材料正迅速涌现。其中一种材料是Formlabs公司的Dental LT Clear树脂，用于制造咬合板、牙齿矫正器和正畸保持器。在本研究中，通过压缩和拉伸试验对总共240个包含两种形状（哑铃形和矩形）的样本进行了评估。压缩试验表明，样本既未经过抛光也未进行老化处理。然而，抛光后，压缩模量值显著下降。具体而言，未抛光且未老化的样本测量值为0.87±0.02，而抛光组测量值为0.086±0.03。结果受到人工老化的显著影响。抛光组测量值为0.73±0.05，未抛光组测量值为0.73±0.03。相比之下，拉伸试验证明，进行抛光处理时样本表现出最高的抗性。人工老化影响了拉伸试验并降低了破坏样本所需的力。进行抛光处理时拉伸模量具有最高值（3.00±0.11）。从这些发现得出的结论如下：1. 抛光不会改变所检测树脂的性能。2. 人工老化会降低压缩和拉伸试验中的抗性。3. 抛光可减少老化过程中对样本的损伤。
