Articles & Issues
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
-
Received October 1, 2024
Revised January 16, 2025
Accepted March 6, 2025
Available online July 25, 2025
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
All issues
Comparison and Evaluation of Marginal and Internal Gaps in Zirconia Crowns Fabricated Using Additive Manufacturing with Top-Down Approach
https://doi.org/
Abstract
Zirconia crowns prepared by the milling method are successfully used for single anterior and posterior restorations. Incorrect
marginal fi t of zirconia prostheses can lead to cavities between the prosthesis and natural teeth, resulting in periodontal
disease. In this study, the marginal fi t of zirconia crowns manufactured by milling machine and top-down additive manufacturing
was compared and analyzed. Existing milling methods show excellent precision, but the fi t result might vary or
the precision would be lowered depending on the degree of use of the burr. In addition, diff erent 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 confi rmed that the top-down approach in
3D printing could enhance precision in ceramic 3D printing.
