Lee Hao-Ern, Alauddin Muhammad Syafiq, Mohd Ghazali Mohd Ifwat, Said Zulfahmi, Mohamad Zol Syazwani
Faculty of Dentistry, Universiti Sains Islam Malaysia, Kuala Lumpur 56100, Malaysia.
Smart Manufacturing and Advanced Renewable Technology Research Group, Faculty Science and Technology, Universiti Sains Islam Malaysia, Nilai 71800, Malaysia.
Polymers (Basel). 2023 Mar 15;15(6):1463. doi: 10.3390/polym15061463.
Three-dimensional printing is increasingly applied in dentistry to fabricate denture bases. Several 3D-printing technologies and materials are available to fabricate denture bases, but there is data scarcity on the effect of printability, mechanical, and biological properties of the 3D-printed denture base upon fabricating with different vat polymerization techniques. In this study, the NextDent denture base resin was printed with the stereolithography (SLA), digital light processing (DLP), and light-crystal display (LCD) technique and underwent the same post-processing procedure. The mechanical and biological properties of the denture bases were characterized in terms of flexural strength and modulus, fracture toughness, water sorption and solubility, and fungal adhesion. One-way ANOVA and Tukey's post hoc were used to statistically analyze the data. The results showed that the greatest flexural strength was exhibited by the SLA (150.8±7.93 MPa), followed by the DLP and LCD. Water sorption and solubility of the DLP are significantly higher than other groups (31.51±0.92 μgmm3) and 5.32±0.61 μgmm3, respectively. Subsequently, the most fungal adhesion was found in SLA (221.94±65.80 CFU/mL). This study confirmed that the NextDent denture base resin designed for DLP can be printed with different vat polymerization techniques. All of the tested groups met the ISO requirement aside from the water solubility, and the SLA exhibited the greatest mechanical strength.
三维打印在牙科领域越来越多地用于制作义齿基托。有几种三维打印技术和材料可用于制作义齿基托，但关于不同光固化聚合技术制作的三维打印义齿基托的可打印性、机械性能和生物学性能的影响，相关数据稀缺。在本研究中，使用立体光刻（SLA）、数字光处理（DLP）和液晶显示（LCD）技术打印NextDent义齿基托树脂，并进行相同的后处理程序。从弯曲强度和模量、断裂韧性、吸水性和溶解性以及真菌黏附方面对义齿基托的机械性能和生物学性能进行表征。使用单因素方差分析和Tukey事后检验对数据进行统计分析。结果表明，SLA打印的义齿基托表现出最大的弯曲强度（150.8±7.93MPa），其次是DLP和LCD。DLP的吸水性和溶解性分别显著高于其他组（分别为31.51±0.92μg/mm³和5.32±0.61μg/mm³）。随后，在SLA打印的义齿基托中发现的真菌黏附最多（221.94±65.80CFU/mL）。本研究证实，专为DLP设计的NextDent义齿基托树脂可以用不同的光固化聚合技术进行打印。除水溶性外，所有测试组均符合ISO要求，且SLA表现出最大的机械强度。
