ABSTRACT The purpose of this study was to improve the mechanical performance of stereolithography for dental zirconia ceramic fabrication by optimising the scanning parameters, including laser power, hatching space, and scanning speed. An L9(43) orthogonal array, based on the Taguchi method, was designed with a minimum number of experimental runs. The analysis of variance was conducted to examine the significant scanning parameters affecting the performance (flexural strength and density) of the final sintered ceramic parts. The results showed that laser power significantly affected flexural strength, but none of the three parameters had a significant influence on the density. The optimised scanning parameters were as follows: laser power, 0.45 W; hatching space, 25 µm; scanning speed, 750 mm s–1. The flexural strength and density reached 978.05 ± 96.23 MPa and 98.42 ± 0.73%, respectively. The flexural strength had been greatly improved in this study, which may be suitable for practical use in dental zirconia ceramic fabrication.

中文翻译：

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牙科氧化锆陶瓷制备立体光刻扫描参数的优化

摘要本研究的目的是通过优化扫描参数（包括激光功率、孵化空间和扫描速度）来提高立体光刻技术在牙科氧化锆陶瓷制造中的机械性能。基于田口方法的 L9(43) 正交阵列被设计为具有最少的实验运行次数。进行方差分析以检查影响最终烧结陶瓷部件性能（弯曲强度和密度）的重要扫描参数。结果表明，激光功率对弯曲强度有显着影响，但三个参数均对密度没有显着影响。优化后的扫描参数为：激光功率，0.45 W；孵化空间，25 µm；扫描速度，750 mm s–1。弯曲强度和密度达到978。分别为 05 ± 96.23 MPa 和 98.42 ± 0.73%。本研究的弯曲强度得到了很大的提高，可能适用于牙科氧化锆陶瓷的制造。