Zhang Faqiang, Zuo Yangbo, Zhang Kesheng, Gao Hairui, Zhang Shupei, Chen Haishen, Liu Guangwang, Jin Xia, Yang Jingzhou
School of Mechanical and Automobile Engineering, Qingdao University of Technology, Qingdao, P.R. China.
Shenzhen Dazhou Medical Technology Co., Ltd., Shenzhen, P.R. China.
3D Print Addit Manuf. 2024 Jun 18;11(3):e1257-e1270. doi: 10.1089/3dp.2022.0342. eCollection 2024 Jun.
Highly dense zirconia ceramic dental crowns were successfully fabricated by a digital light processing (DLP) additive manufacturing technique. The effects of slurry solid content and exposure density on printing accuracy, curing depth, shrinkage rate, and relative density were evaluated. For the slurry with a solid content of 80 wt%, the curing depth achieved 40 μm with minimal overgrowth under an exposure intensity of 16.5 mW/cm. Solid content and sintering temperature had remarkable effects on physical properties and microstructure. Higher solid content resulted in better structural integrity, higher relative density, and denser microstructure. Compressive strength, Vickers hardness, fracture toughness, and wear resistance significantly increase with lifting solid content, reaching values of 677 MPa, 12.62 GPa, 6.3 MPa·m, and 1.5 mg/min, respectively, for 1500°C sintered zirconia dental crowns printed from a slurry with 80 wt% solid content. DLP is deemed a promising technology for the fabrication of zirconia ceramic dental crowns for tooth repair.
采用数字光处理（DLP）增材制造技术成功制备了高致密氧化锆陶瓷牙冠。评估了浆料固含量和曝光密度对打印精度、固化深度、收缩率和相对密度的影响。对于固含量为80 wt%的浆料，在16.5 mW/cm的曝光强度下，固化深度达到40μm，过生长最小。固含量和烧结温度对物理性能和微观结构有显著影响。较高的固含量导致更好的结构完整性、更高的相对密度和更致密的微观结构。随着固含量的提高，抗压强度、维氏硬度、断裂韧性和耐磨性显著增加，对于由固含量为80 wt%的浆料打印并在1500°C烧结的氧化锆牙冠，其值分别达到677 MPa、12.62 GPa、6.3 MPa·m和1.5 mg/min。DLP被认为是一种用于制造用于牙齿修复的氧化锆陶瓷牙冠的有前途的技术。
