Liang Xiaoxu, Yu Biao, Dai Yuan, Wang Yueyang, Hu Mingye, Zhong Hai-Jing, He Jingwei
School of Arts and Sciences, Guangzhou Maritime University, Guangzhou 510725, China.
School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang 524048, China.
Materials (Basel). 2025 May 10;18(10):2202. doi: 10.3390/ma18102202.
Three-dimensional (3D) printing represents a pivotal technological advancement in dental prosthetics, fundamentally transforming the fabrication of provisional crowns and bridges through innovative vat photopolymerization methodologies, specifically stereolithography (SLA) and digital light processing (DLP). This comprehensive scholarly review critically examines the technological landscape of 3D-printed resin-based dental provisional crowns and bridges, systematically analyzing their material performance, clinical applications, and prospective developmental trajectories. Empirical investigations demonstrate that these advanced restorations exhibit remarkable mechanical characteristics, including flexural strength ranging from 60 to 90 MPa and fracture resistance of 1000-1200 N, consistently matching or surpassing traditional manufacturing techniques. The digital workflow introduces substantial procedural innovations, dramatically reducing fabrication time while simultaneously achieving superior marginal adaptation and internal architectural precision. Despite these significant technological advancements, critical challenges persist, encompassing material durability limitations, interlayer bonding strength inconsistencies, and the current paucity of longitudinal clinical evidence. Contemporary research initiatives are strategically focused on optimizing resin formulations through strategic filler incorporation, enhancing post-processing protocols, and addressing fundamental limitations in color stability and water sorption characteristics. Ultimately, this scholarly review aims to provide comprehensive insights that will inform evidence-based clinical practices and delineate future research trajectories in the dynamically evolving domain of digital dentistry, with the paramount objective of advancing patient outcomes through technological innovation and precision-driven methodological approaches.
三维（3D）打印是牙科修复领域一项关键的技术进步，通过创新的光固化聚合方法，特别是立体光刻（SLA）和数字光处理（DLP），从根本上改变了临时冠和桥的制作方式。这篇全面的学术综述批判性地审视了基于3D打印树脂的牙科临时冠和桥的技术现状，系统地分析了它们的材料性能、临床应用和未来发展轨迹。实证研究表明，这些先进的修复体具有显著的机械特性，包括60至90兆帕的抗弯强度和1000 - 1200牛的抗断裂性，始终与传统制造技术相当或更优。数字化工作流程引入了大量程序创新，大幅减少了制作时间，同时实现了卓越的边缘适应性和内部结构精度。尽管取得了这些重大技术进步，但关键挑战依然存在，包括材料耐久性限制、层间粘结强度不一致，以及目前纵向临床证据的匮乏。当代研究计划战略性地聚焦于通过策略性添加填料优化树脂配方、改进后处理方案，以及解决颜色稳定性和吸水性特征方面的基本限制。最终，这篇学术综述旨在提供全面的见解，为循证临床实践提供参考，并描绘数字牙科动态发展领域的未来研究轨迹，其首要目标是通过技术创新和精确驱动的方法推进患者治疗效果。
