Comparison and Evaluation of Marginal and Internal Gaps in Zirconia Crowns Fabricated Using Additive Manufacturing with Top-Down Approach

IF 3.2 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Sang-Kyu Lee, Chan Park, Kwang-Ho Jo, Sang-Hyun Choi, Hyein Lee, Kyoung-Jun Jang, Taekyung Yu
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引用次数: 0

Abstract

Zirconia crowns prepared by the milling method are successfully used for single anterior and posterior restorations. Incorrect marginal fit of zirconia prostheses can lead to cavities between the prosthesis and natural teeth, resulting in periodontal disease. In this study, the marginal fit of zirconia crowns manufactured by milling machine and top-down additive manufacturing was compared and analyzed. Existing milling methods show excellent precision, but the fit result might vary or the precision would be lowered depending on the degree of use of the burr. In addition, different results could be shown depending on the limitations of the milling axis of CAD/CAM equipment or the compensation value of the milling bur. The additive manufacturing method could solve all of these limitations because there is no consumption of cutting tools and complex shapes are processed with a constant layer thickness. Furthermore, we confirmed that the top-down approach in 3D printing could enhance precision in ceramic 3D printing.

Abstract Image

自顶向下增材制造氧化锆冠边缘和内部间隙的比较与评价
采用研磨法制备的氧化锆冠成功地用于单前、后牙修复。不正确的氧化锆假体边缘配合会导致假体与天然牙齿之间产生空洞,从而导致牙周病。在本研究中,比较分析了铣床制造和自顶向下增材制造的氧化锆冠的边缘配合。现有的铣削方法具有良好的精度,但由于毛刺的使用程度不同,其拟合结果可能不同或精度降低。此外,由于CAD/CAM设备的铣削轴的限制或铣削轴的补偿值的不同,可以显示不同的结果。增材制造方法可以解决所有这些限制,因为它不消耗刀具,并且可以用恒定的层厚度加工复杂的形状。此外,我们证实了自上而下的3D打印方法可以提高陶瓷3D打印的精度。
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来源期刊
Korean Journal of Chemical Engineering
Korean Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
4.60
自引率
11.10%
发文量
310
审稿时长
4.7 months
期刊介绍: The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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