A5012154590- Dental materials and restorations
- Dental Research and COVID-19
- Dental Implant Techniques and Outcomes
- Additive Manufacturing and 3D Printing Technologies
- Dental Radiography and Imaging
- Bone Tissue Engineering Materials
- Anatomy and Medical Technology
- Structural Behavior of Reinforced Concrete
- Digital Imaging in Medicine
- Viral gastroenteritis research and epidemiology
- Dental Erosion and Treatment
- Animal Virus Infections Studies
- Engineering Technology and Methodologies
- Endodontics and Root Canal Treatments
- Catalysis and Hydrodesulfurization Studies
- Metallurgy and Material Forming
- Orthodontics and Dentofacial Orthopedics
- Structural Engineering and Vibration Analysis
- Structural Health Monitoring Techniques
- Dental Education, Practice, Research
- Advanced ceramic materials synthesis
- Healthcare Education and Workforce Issues
- Additive Manufacturing Materials and Processes
- Engineering Applied Research
- Robotics and Sensor-Based Localization
Catholic University of Pusan
2019-2025
Dankook University
2023
University of Dental Medicine
2022
Daejeon Health Institute of Technology
2020-2021
Pusan National University
2017-2020
Dongnam Health University
2018
Electronics and Telecommunications Research Institute
2011-2017
Kyungdong University
2016
Korea University
2012-2015
Samsung (South Korea)
2009-2015
One of the most important factors in evaluating quality fixed dental prostheses (FDPs) is their gap. The purpose this study was to compare marginal and internal gap two different metal-ceramic crowns, casting selective laser sintering (SLS), before after porcelain firing. Furthermore, evaluated whether crowns made using SLS have same clinical acceptability as by traditional casting.The 10 models were produced stone. 20 specimens methods; samples each group. After core measurements, group...
The purpose of this study was to verify the clinical-feasibility additive manufacturing by comparing accuracy four different methods for metal coping: conventional lost wax technique (CLWT); subtractive with blank milling (WBM); and two methods, multi jet modeling (MJM), micro-stereolithography (Micro-SLA). Thirty models were created using an acrylic model maxillary upper right canine, first premolar, molar teeth. Based on scan files from a non-contact blue light scanner (Identica; Medit Co....
This study evaluated the internal and marginal accuracy (trueness precision) of zirconia laminate veneers fabricated using DLP printing milling method, employing 3D analysis software program. The maxillary central incisor tooth a typodont model was prepared by dentist scanned desktop scanner. An anatomical designed computer-aided design (CAD) saved in standard tessellation language (STL) format. Thirty laminates were manufactured machine (MLL group) printer (PTL group). All specimens...
Accuracy and precision of polyurethane dental arch models fabricated using a three-dimensional subtractive rapid prototyping method with an intraoral scanning techniqueObjective: This study aimed to evaluate the accuracy (PUT) (3D) (RP) technique by comparing linear measurements obtained from PUT conventional plaster models.Methods: Ten were duplicated selected standard master model impression, 10 3D RP oral scanner.Six evaluated in terms x, y, z-axes non-contact white light scanner.Accuracy...
The aim of this study is to quantify the effect crystallization process on lithium disilicate ceramic crowns fabricated using a computer-aided design/computer-aided manufacturing (CAD/CAM) system and determine whether clinically acceptable by comparing values fit before after process. mandibular right first molar was selected as abutment for experiments. Fifteen working models were prepared. Lithium appropriate each prepared commercial CAD/CAM system. Gaps in marginal area 4 internal areas...
The aims of this study were to evaluate the feasibility 70% reduced inlay and 4-unit bridge models International Standard (ISO 12836) assessing accuracy laboratory scanners measure intraoral scanner. Four (CS3500, Trios, Omnicam, Bluecam) one scanner (Ceramill MAP400) used in study. height, depth, length, angle measured from thirty scanned stereolithography (STL) images. There no statistically significant mean deviations distance precision values images, except angulation models. relative...
The demand for high-quality and high-speed imaging has increased. Column-parallel ≥14b A/D conversion is one of the major approaches to meet these requirements in CMOS image sensors (CIS). Oversampling ADCs such as incremental delta-sigma (I-ΔΣ) are solution a high-resolution ADC having tolerance analog component errors. reduces input temporal noise well quantization error itself [1]. However, an I-ΔΣ also classified slow because it requires exponential time get higher bit resolution. To...
The K-I and nephropathogenic K-II genotypes of infectious bronchitis virus (IBV) have been isolated since 1995 1990, respectively, in Korea commercial inactivated oil-emulsion vaccines containing KM91 (K-II type) Massachusetts 41 strains used the field. To date, genomic analyses Korean IBV animal models to test pathogenicity IBVs reproductive organs rare. In present study, comparative genomics SNU8067 (K-I was performed, an model established applied vaccine efficacy test. genome sizes...
Objective: This study addresses common errors that may occur during digital impression procedures using the CEREC AC and in-office CAD/CAM systems. Error types frequencies resulting from impressions of oral cavity were investigated their origins identified to facilitate acquisition more accurate impressions. Method Materials: A total 1,251 cases, including 163 onlays 1,088 inlays, constructed as restorations system. Two evaluators determined five categories a basis for evaluation over two...
The purpose of this study was to compare and evaluate, through histomorphometric radiological analysis, the effects UV photofunctionalization on an implant placed over a critical defect area with without bone graft. Four female beagle dogs were first divided into control graft groups. Each group then subdivided UV-treated UV-untreated mandibular premolars in each dog extracted. 12 weeks after extraction, implants according condition group. implantation left right mandible, sacrificed....
Commercial organic matrixes of dental composites generally include diluents such as triethylene glycol dimethacrylate (TEGDMA) to reduce viscosity. However, the diluent exhibits adverse effects curing shrinkage and diminished mechanical properties composites. To overcome these effects, monomers that can be used an matrix may developed. In this study, various novel were developed by substituting alkoxy for hydroxyl groups in 2,2-bis[4-(2-hydroxy-3-methacryloyloxy propoxy)phenyl]propane...
The objective of this study was to evaluate the clinical acceptability all-ceramic crowns fabricated by digital veneering method vis-à-vis traditional method.Zirconia specimens manufactures two different manufacturing method, conventional vs veneering, with three thickness (0.3 mm, 0.5 0.7 mm) were prepared for analysis. Color measurement performed using a spectrophotometer specimens. differences in shade relation build-up calculated quantifying ΔE(*) (mean color difference), use difference...
DLP printing is a new method for producing zirconia laminates that ensure clinically acceptable gaps in the internal, marginal, and incisal regions. A typical model of central maxillary incisor was prepped by dentist scanned. The laminate designed using CAD software version 2023. were fabricated milling machine (LSM group) printer (LAM (N = 20). gap evaluated silicone replica at designated measurement points. Statistical analyses performed. Shapiro–Wilk Kolmogorov–Smirnov tests indicated...
Reinforced concrete (RC) joint shear strength models are constructed using an experimental database in conjunction with a Bayesian parameter estimation method. The consists of RC beam-column connection test subassemblies that maintained proper confinement within the panel. All included were subjected to quasi-static cyclic lateral loading and eventually experienced failure (either or without yielding beam reinforcement); out-of-plane members and/or eccentricity between beam(s) column not...
The clinical applicability of CAD/CAM-fabricated zirconia copings is tested using working models made from four different highstrength Type IV gypsum materials. Each the materials was used to fabricate 15 copings. Precision fit measured with a digital electron microscope silicone replica technique. mean and standard deviation each reference point were analyzed one-way analysis variance (ANOVA) Tukey's honest significant difference (HSD) tests (α=0.05). overall marginal internal fits as...
Recently, the hot stamping process using local blank heating has been widely used to manufacture lightweight and crashworthy automotive parts. However, hardness prediction of stamped parts produced is difficult because it involves many variables, such as temperature, time, cooling rate. The purpose this study was predict fabricated based on quench factor analysis (QFA). volume fraction austenite measured consider phase transformation in stage, expressed by Johnson–Mehl–Avrami–Kolmogorov...
In this study, the hot forming quenching process was investigated to improve deficiencies that arise in materials subjected conventional cold stamping, such as low formability and undesirable mechanical properties. The mainly discussed terms of properties study first evaluated by preliminary tests. To examine formability, an evaluation conducted using hot-tensile hemispherical-dome stretching tests at temperatures 350°C 450°C, respectively. addition, formed part were predicted quench factor...
The purpose of this study was to investigate, by measuring the gap, possible clinical use three-unit fixed dental prostheses (FDPs) manufactured using stereolithography. A total 20 epoxy models were built with a same case (abutment teeth 14, 16). 40 specimens produced stereolithography (SLA) and wax-up (LW). 960 gaps measured silicone replica. Wilcoxon rank sum test then used compare analyze data obtained from two groups (α=0.05). as SLA LW groups, 98.6 66.6 µm, respectively. results...
Carbon-based cathode catalysts derived from a hyperbranched iron phthalocyanine polymer (HB-FePc) were characterized, and their active-site formation mechanism was studied by synchrotron-based spectroscopy. The properties of the HB-FePc catalyst are compared with those high oxygen reduction reaction (ORR) activity synthesized mixture phenolic resin (FePc/PhRs). Electrochemical measurements demonstrate that does not lose its ORR up to 900°C, whereas FePc/PhRs decreases above 700°C. Hard X-ray...