Department of Prosthodontics, College of Dentistry, Yonsei University, Yonsei-ro 50-1, Seodaemun-gu, Seoul, 03722, Republic of Korea.
Sci Rep. 2024 Apr 30;14(1):9909. doi: 10.1038/s41598-024-60450-7.
Three-dimensional (3D) printing, otherwise known as additive manufacturing in a non-technical context, is becoming increasingly popular in the field of dentistry. As an essential step in the 3D printing process, postwashing with organic solvents can damage the printed resin polymer and possibly pose a risk to human health. The development of water-washable dental resins means that water can be used as a washing agent. However, the effects of washing agents and washing times on the mechanical and biocompatibility properties of water-washable resins remain unclear. This study investigated the impact of different washing agents (water, detergent, and alcohol) and washing time points (5, 10, 20, and 30 min) on the flexural strength, Vickers hardness, surface characterization, degree of conversion, biocompatibility, and monomer elution of 3D printed samples. Using water for long-term washing better preserved the mechanical properties, caused a smooth surface, and improved the degree of conversion, with 20 min of washing with water achieving the same biological performance as organic solvents. Water is an applicable agent option for washing the 3D printing water-washable temporary crown and bridge resin in the postwashing process. This advancement facilitates the development of other water-washable intraoral resins and the optimization of clinical standard washing guidelines.
三维（3D）打印，在非技术语境中也称为增材制造，在牙科领域越来越受欢迎。作为 3D 打印过程中的一个重要步骤，用有机溶剂进行后清洗可能会损坏打印的树脂聚合物，并可能对人体健康造成风险。可水洗牙科树脂的开发意味着可以用水作为清洗剂。然而，清洗剂和清洗时间对可水洗树脂的机械和生物相容性特性的影响尚不清楚。本研究探讨了不同清洗剂（水、清洁剂和酒精）和清洗时间点（5、10、20 和 30 分钟）对 3D 打印样品的弯曲强度、维氏硬度、表面特性、转化率、生物相容性和单体洗脱的影响。使用水进行长期清洗可以更好地保持机械性能，使表面光滑，并提高转化率，用 20 分钟的水洗即可达到与有机溶剂相同的生物学性能。水是 3D 打印可水洗临时冠桥树脂后清洗过程中一种适用的清洗剂选择。这一进展促进了其他可水洗口腔内树脂的开发和临床标准清洗指南的优化。
