Seoul National University · Dentistry
Professor Hyung-In Yoon's research lab specializes in digital dentistry and advanced dental materials, focusing on the precision and clinical application of chairside CAD/CAM systems, intraoral scanning accuracy in edentulous patients, and the fabrication of monolithic ceramic restorations using additive manufacturing techniques. The lab investigates the trueness and biocompatibility of zirconia and lithium disilicate crowns, as well as innovative ceramic 3D printing methods such as continuous film supply DLP for high-solid-content zirconia prototypes. Their work bridges digital technology and clinical dentistry, aiming to improve the predictability and efficiency of single-visit dental restorations.
Figures are computed from collected data and may differ slightly.
Research on whether the number or location of missing teeth affects the accuracy of intraoral scanners in partial edentulous patients is scarce. This study aimed to evaluate the precision of complete-arch scan data of various partial edentulous arches acquired by intraoral scanners. Five different maxillary models were scanned using Carestream CS3600 and Medit i500 scanners. The models employed here were control: Fully dentate; Case 1: Missing a right second premolar and a first molar; Case 2: M
The digital intraoral scanner may not be used as the primary method of color selection in clinical practices, considering significant differences in color parameters with colorimeter. The scanner's capability in shade selection should be further evaluated.
A single-visit zirconia restoration can be easily achieved if direct milling of a fully sintered zirconia block can be performed without much effort. However, no studies have yet been reported regarding the evaluation of the trueness of crown fabricated from chairside-milling of a fully sintered zirconia block in the chairside computer-aided design and computer-aided manufacturing (CAD-CAM) system for single-visit dentistry. This in vitro study aimed to evaluate the trueness of crowns fabricated
Within limitations of this study, the bonded restorations of premolars with CAD/CAM-generated lithium disilicate were reliable, regardless of cavity preparation design.
Fifteen participants (9 male, 6 female) received a total of 15 monolithic single restorations made from fully sintered (Y, Nb)-TZP (tetragonal zirconia polycrystal) block. The restorations were clinically evaluated for survival, success rate, and periodontal probing depths 6 months after the insertion of the restorations. Esthetic, functional, and biological evaluations were also performed over a 6-month follow-up period. The survival and success rates of the single-unit restorations were 100%.
Stereolithography (SL) can fabricate complex ceramic parts layer by layer using computer-aided design (CAD) models. The traditional SL system utilizes a vat filled with ceramic slurry with a high solid content, which for ceramics contributes to several limitations and operational difficulties, and further renders it nonrecyclable mainly due to the presence of printed residue and its high viscosity. In this study, we utilized a continuous film supply (CFS) system integrated with a tape-casting ty
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