Noh Mijun, Kim Jaehong
Department of Healthcare Sciences, Faculty of Dental Laboratory Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan, 57 Oryundae-ro, Geumjeong-gu, Busan 46252, Republic of Korea.
Biomimetics (Basel). 2024 Nov 28;9(12):728. doi: 10.3390/biomimetics9120728.
DLP printing is a new method for producing zirconia laminates that ensure clinically acceptable gaps in the internal, marginal, and incisal regions. A typical model of a central maxillary incisor was prepped by a dentist and scanned. The laminate was designed using CAD software version 2023. The laminates were fabricated using a milling machine (LSM group) and a DLP printer (LAM group) (N = 20). The gap was evaluated using the silicone replica method at designated measurement points. Statistical analyses were performed. The Shapiro-Wilk and Kolmogorov-Smirnov tests indicated a non-normal distribution, and the Mann-Whitney test was used. The LSM group had wider gaps than the LAM group except at point E (59.5 µm). The LAM group had wider gaps than the LSM group, except at points H (51.70 µm). No significant differences were observed between the LSM and LAM groups at any of the labiolingual measurement points. In the mesiodistal plane, a significant difference was observed between the two groups at point G, which was adjacent to the mesial side ( < 0.05). The results of this study indicate that DLP printing offers an innovative approach for producing zirconia laminates, as the incisal, internal, and marginal gaps are within clinically acceptable ranges compared with the AM method.
数字光处理（DLP）打印是一种生产氧化锆贴面的新方法，可确保在内部、边缘和切端区域形成临床上可接受的间隙。一名牙医制备并扫描了一个典型的上颌中切牙模型。使用2023版CAD软件设计贴面。使用铣床（LSM组）和数字光处理打印机（LAM组）制作贴面（N = 20）。使用硅橡胶复制法在指定测量点评估间隙。进行了统计分析。夏皮罗-威尔克检验和柯尔莫哥洛夫-斯米尔诺夫检验表明数据呈非正态分布，因此使用了曼-惠特尼检验。除了E点（59.5 µm）外，LSM组的间隙比LAM组宽。除了H点（51.70 µm）外，LAM组的间隙比LSM组宽。在任何唇舌向测量点，LSM组和LAM组之间均未观察到显著差异。在近远中平面上，两组在与近中侧相邻的G点存在显著差异（<0.05）。本研究结果表明，与增材制造（AM）方法相比，数字光处理打印为生产氧化锆贴面提供了一种创新方法，因为切端、内部和边缘间隙均在临床可接受范围内。
