Response to the coronavirus disease 2019 pandemic of dental hygienists in South Korea-Part III: COVID-19 vaccination intentions.

Objectives: This cross-sectional study was to determine the coronavirus disease 2019 (COVID-19) vaccination intention of clinical dental hygienists in South Korea and the factors that influence vaccination intention.

Methods: COVID-19 vaccination intention of the 500 participants was confirmed through a survey including the following options: 'I will vaccinate (VAC)', 'I will not vaccinate (NoVAC)' and 'I do not know if I should get vaccinated (UNK)'. A Chi-square test was performed to determine whether there were differences in COVID-19 vaccination intention according to the general characteristics of the participants, degree of infection control knowledge (Score-K) and practice (Score-P) in response to COVID-19, fears over COVID-19 (Fear-C) and the level of anxiety before (GAD ) and after (GAD ) the COVID-19 pandemic.

Effect of the coronavirus disease 2019 pandemic on oral health of Korean adolescents.

Objectives: To investigate the effect of the coronavirus disease (COVID-19) pandemic on Korean adolescents' oral health and identify the influential factors.

Methods: The raw data from The Korea Youth Risk Behaviour Web-based Survey before (2019) and after (2020) the outbreak of COVID-19 were used in the study. Demographic characteristics and subjective general, mental, and oral health were analysed and compared between the 2 years.

Response to the coronavirus disease 2019 pandemic of dental hygienists in South Korea-Part II: Fear and anxiety.

Objectives: The purpose of this cross-sectional study was to evaluate the mental fear and anxiety about coronavirus disease 2019 (COVID-19) among Korean clinical dental hygienists and to investigate factors influencing the anxiety felt after the outbreak of COVID-19.

Methods: A questionnaire on mental fear (Fear-C) and anxiety for COVID-19 was conducted among 500 clinical dental hygienists in South Korea. Fear-C was identified with eight questions.

Factors affecting the infection control behaviours of Korean dental hygienists in response to the coronavirus disease 2019 pandemic.

Objectives: This study aimed to identify the factors affecting the prevention of cross-infection with coronavirus disease-19 (COVID-19) among Korean dental hygienists.

Methods: The level of knowledge about COVID-19 (KNW ), level of awareness of infection control (AWR ), degree of performance for infection control (PRF ), and organizational factors for infection control (OFW ) of clinical dental hygienists in Korea to prevent COVID-19 transmission were investigated. A self-written online questionnaire was administered to dental hygienists currently working in dental clinics or hospitals, and the survey results of 263 participants were analysed.

A novel mechanism of Korean Red Ginseng-mediated anti-inflammatory action via targeting caspase-11 non-canonical inflammasome in macrophages.

Background: Korean Red Ginseng (KRG) was reported to play an anti-inflammatory role, however, previous studies largely focused on the effects of KRG on priming step, the inflammation-preparing step, and the anti-inflammatory effect of KRG on triggering, the inflammation-activating step has been poorly understood. This study demonstrated anti-inflammatory role of KRG in caspase-11 non-canonical inflammasome activation in macrophages during triggering of inflammatory responses.

Methods: Caspase-11 non-canonical inflammasome-activated J774A.

Response to the coronavirus disease 2019 pandemic of dental hygienists in South Korea-Part Ⅰ: Knowledge and practice of infection control.

Objectives: To evaluate infection control knowledge and its practice of clinical dental hygienists in response to Coronavirus Disease 2019 (COVID-19) in South Korea.

Methods: Nine questions (Q9-K) on the degree of knowledge acquisition of dental hygienists in response to COVID-19, and another 9 questions (Q9-P) on the practices for COVID-19 infection and spread prevention were prepared. From 500 clinical dental hygienists in South Korea, answers about their general characteristics, Q9-K, and Q9-P were collected.

Optical detection of the potential for tooth discoloration from children's beverages by quantitative light-induced fluorescence technology.

Background: Some beverages are known to cause extrinsic staining on the tooth. This study investigated the degree of pigmentation caused by children's acidic beverages, and to confirm the possibility of the quantitative light-induced fluorescence (QLF) technology in assessing staining of the tooth.

Methods: Bovine tooth specimens were subjected to an 8-day pH-cycling model, using six children's beverages (experimental groups) and a cola (control group), and a remineralizing solution.

Effect of Using an 8-Figure Shoulder Brace on Posture and Muscle Activities during the Performance of Dental Hygiene Procedures.

The incidence of work-related musculoskeletal disorders (MSDs) among dental workers has been increasing. Many ergonomic devices and accessories have been introduced. The aim of this study was to investigate the effects of an 8-figure shoulder brace on posture-related muscle activities in dental hygiene practitioners during scaling procedures.

Assessment of Cellular Uptake Efficiency According to Multiple Inhibitors of FeO-Au Core-Shell Nanoparticles: Possibility to Control Specific Endocytosis in Colorectal Cancer Cells.

Magnetite (FeO)-gold (Au) core-shell nanoparticles (NPs) have unique magnetic and optical properties. When combined with biological moieties, these NPs can offer new strategies for biomedical applications, such as drug delivery and cancer targeting. Here, we present an effective method for the controllable cellular uptake of magnetic core-shell NP systems combined with biological moieties.

The effects of discrete and gradient mid-shell structures on the photoluminescence of single InP quantum dots.

We investigated the dependence of the spectral diffusion and blinking behaviors of indium phosphide (InP) based core/shell/shell quantum dots (QDs) on their mid-shell compositions. We synthesized two types of core/shell/shell QDs having different mid-shell structures by controlling the shell thickness, the total sizes, and the selenium to sulfur ratios. The QDs with a discrete mid-shell (DS-QDs) exhibited a higher photoluminescence (PL) quantum yield (QY) and a narrower PL linewidth than the QDs with a gradient mid-shell (GS-QDs).

Validity and Reliability of an Inertial Measurement Unit-based 3-Dimensional Angular Measurement of Cervical Range of Motion.

Objective: This study aimed to assess the reliability and validity of an inertial measurement unit (IMU)-based 3-dimensional (3D) angular measurement system for evaluating cervical range of motion.

Methods: Thirty-three healthy participants (21.9 ± 2.

Evaluation of resin infiltration using quantitative light-induced fluorescence technology.

Objectives: To determine whether quantitative light-induced fluorescence (QLF) technology can be used to classify the colour of teeth specimens before and after resin infiltration (RI) treatment, and calculate the correlation between the ΔF value and colour difference (ΔE) in fluorescence images of the specimens obtained using a QLF-digital (QLF-D) device.

Methods: Sixty sound bovine permanent teeth specimens were immersed in demineralized solution. Two exposed windows were formed in each specimen, and RI treatment was applied to one of them.

Resveratrol inhibits collagen-induced platelet stimulation through suppressing NADPH oxidase and oxidative inactivation of SH2 domain-containing protein tyrosine phosphatase-2.

Reactive oxygen species (ROS) produced upon collagen stimulation are implicated in propagating various platelet-activating pathways. Among ROS-producing enzymes, NADPH oxidase (NOX) is largely responsible for collagen receptor-dependent ROS production. Therefore, NOX has been proposed as a novel target for the development of antiplatelet agent.

Magnetic nanodiscs fabricated from multilayered nanowires.

We report a simple, high throughput synthesis method of producing magnetic nanodiscs, in which the diameter and thickness are easily controlled. This method consists of two steps: (1) Electrodeposition for growing multilayered nanowires and (2) Selective etching of sacrificial layers. The electrodeposition step results in a bundle of multilayered nanowires.

Peroxiredoxin II is an antioxidant enzyme that negatively regulates collagen-stimulated platelet function.

Collagen-induced platelet signaling is mediated by binding to the primary receptor glycoprotein VI (GPVI). Reactive oxygen species produced in response to collagen have been found to be responsible for the propagation of GPVI signaling pathways in platelets. Therefore, it has been suggested that antioxidant enzymes could down-regulate GPVI-stimulated platelet activation.

Kaempferol suppresses collagen-induced platelet activation by inhibiting NADPH oxidase and protecting SHP-2 from oxidative inactivation.

Reactive oxygen species (ROS) generated upon collagen stimulation act as second messengers to propagate various platelet-activating events. Among the ROS-generating enzymes, NADPH oxidase (NOX) plays a prominent role in platelet activation. Thus, NOX has been suggested as a novel target for anti-platelet drug development.

The toxicity and distribution of iron oxide-zinc oxide core-shell nanoparticles in C57BL/6 mice after repeated subcutaneous administration.

Therapeutic cancer vaccines promote immune responses by delivering tumour-specific antigens. Recently, we developed iron oxide (Fe3 O4 )-zinc oxide (ZnO) core-shell nanoparticles (CSNPs) as carriers for antigen delivery into dendritic cells (DCs), and the CSNPs were injected subcutaneously into C57BL/6 mice to examine the systemic toxicity, tissue distribution and excretion of the CSNPs. The doses injected were 0, 4, 20 and 200 mg kg(-1) weekly for 4 weeks.

Modification of surface pretreatment of white spot lesions to improve the safety and efficacy of resin infiltration.

Objective: A low-viscosity resin (infiltrant) was used to inhibit the progression of white spot lesions (WSLs) and resolve associated esthetic issues. An alternative pretreatment was explored to increase the pore volume of the surface layer of the WSLs. Also, the penetration effects of the infiltrant were evaluated for various pretreatments.

Prevention of dental erosion of a sports drink by nano-sized hydroxyapatite in situ study.

Aim: To evaluate the inhibitory effects of the sports drink containing nano-sized hydroxyapatite (nano-HA) on dental erosion in situ.

Design: The study had a single-blind, two-treatment crossover design. The two treatment groups were a control group (CG; Powerade only) and an experimental group (EG; 0.

Synthesis, microstructure, and magnetic properties of monosized MnxZnyFe3 - x - yO4 ferrite nanocrystals.

We report the synthesis and characterization of ferrite nanocrystals which exhibit high crystallinity and narrow size distributions. The three types of samples including Zn ferrite, Mn ferrite, and Mn-Zn ferrite were prepared via a non-aqueous nanoemulsion method. The structural, chemical, and magnetic properties of the nanocrystals are analyzed by transmission electron microscopy, X-ray diffraction, X-ray fluorescence, and physical property measurement system.

Isolation of DNA using magnetic nanoparticles coated with dimercaptosuccinic acid.

Lately, the isolation of DNA using magnetic nanoparticles has received increased attention owing to their facile manipulation and low costs. Although methods involving their magnetic separation have been extensively studied, there is currently a need for an efficient technique to isolate DNA for highly sensitive diagnostic applications. We describe herein a method to isolate and purify DNA using biofunctionalized superparamagnetic nanoparticles synthesized by a modified polyol method to obtain the desired monodispersity, followed by surface modification with meso-2,3-dimercaptosuccinic acid (DMSA) containing carboxyl groups for DNA absorption.

Reactive oxygen species play a critical role in collagen-induced platelet activation via SHP-2 oxidation.

Aims: The collagen-stimulated generation of reactive oxygen species (ROS) regulates signal transduction in platelets, although the mechanism is unclear. The major targets of ROS include protein tyrosine phosphatases (PTPs). ROS-mediated oxidation of the active cysteine site in PTPs abrogates the PTP catalytic activity.

Risk stratification using computed tomography coronary angiography in patients undergoing intermediate-risk noncardiac surgery.

Objectives: This study evaluated whether coronary artery calcium scores (CACS) and the degree of stenosis that were measured with computed tomography coronary angiography (CTCA) predicted post-operative cardiovascular events in patients who were undergoing intermediate-risk noncardiac surgery.

Background: Cardiovascular complications are important causes of mortality and morbidity in patients undergoing major noncardiac surgeries.

Methods: A total of 239 patients underwent CTCA before intermediate-risk noncardiac surgeries.

Influence of platelet reactivity and inflammation on peri-procedural myonecrosis in East Asian patients undergoing elective percutaneous coronary intervention.

Background And Objectives: The contribution of multiple risk factors to peri-procedural myocardial infarction (PMI) in East Asians remains controversial. To assess the influence of clinical or laboratory covariates on PMI in these patients.

Methods: Stable patients (n=341) undergoing elective percutaneous coronary intervention (PCI) were enrolled.

Rupture and spontaneous sealing of a coronary aneurysm after deployment of drug-eluting stent.

Lesions with coronary artery aneurysm (CAA) can become complicated during percutaneous coronary intervention. Here, we report a case of a 78-year-old man who developed a rupture, and spontaneous sealing of the CAA occurred after stent implantation, as shown by computed tomography coronary angiography.