Sang-Kyu Lee, Chan Park, Kwang-Ho Jo, Sang-Hyun Choi, Hyein Lee, Kyoung-Jun Jang, Taekyung Yu
{"title":"Comparison and Evaluation of Marginal and Internal Gaps in Zirconia Crowns Fabricated Using Additive Manufacturing with Top-Down Approach","authors":"Sang-Kyu Lee, Chan Park, Kwang-Ho Jo, Sang-Hyun Choi, Hyein Lee, Kyoung-Jun Jang, Taekyung Yu","doi":"10.1007/s11814-025-00437-w","DOIUrl":null,"url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 8","pages":"1873 - 1879"},"PeriodicalIF":3.2000,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Korean Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11814-025-00437-w","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
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.
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.