Departamento de Ingeniería Mecánica, Energética y de los Materiales, Universidad de Extremadura, Badajoz, Spain.
J Mater Sci Mater Med. 2024 Sep 30;35(1):59. doi: 10.1007/s10856-024-06831-w.
A 3-D printing method to produce dental prostheses of complex shapes from a commercial, photocurable resin-ceramic slurry is developed and optimized. The microstructure, mechanical properties and wear behavior of the resulting material are evaluated and compared with a conventional/control sample and other ceramic-polymer dental composites. Commercial resin-ceramic dental slurries can be successfully extruded and appropriately photocured in a low cost 3-D printing system to produce cost-efficient complex dental parts that could be used in indirect restorations. The printing process does not appreciably introduce defects in the material and the 3-D printed composites exhibit mechanical properties (hardness, elastic modulus) and wear resistance comparable to the control material and analogous, conventional dental composites. The main wear mechanisms under sliding contact against a hard antagonist are plastic deformation at the asperity level and ceramic particle pull-out due to filler/matrix interfacial weakness.
开发并优化了一种从商业光固化树脂陶瓷浆料中生产复杂形状牙科修复体的 3D 打印方法。评估了所得材料的微观结构、力学性能和磨损行为，并与传统/对照样品和其他陶瓷-聚合物牙科复合材料进行了比较。商业树脂陶瓷牙科浆料可以在低成本的 3D 打印系统中成功挤出并适当光固化，以生产具有成本效益的复杂牙科零件，可用于间接修复。打印过程不会显著引入材料缺陷，3D 打印复合材料表现出的机械性能（硬度、弹性模量）和耐磨性与对照材料和类似的传统牙科复合材料相当。在与硬对齿滑动接触下的主要磨损机制是在粗糙表面水平上的塑性变形和由于填充/基质界面薄弱而导致陶瓷颗粒拔出。
