Poly(methyl methacralyate) (PMMA) has long been used in dentistry as a base polymer for dentures, and it is recently being the 3D printing of dental materials. Despite its many advantages, susceptibility to microbial colonization remains be overcome. In this study, interface between 3D-printed PMMA specimens oral salivary biofilm was studied following addition zwitterionic materials, 2-methacryloyloxyethyl phosphorylcholine (MPC) or sulfobetaine methacrylate (SB). A significant reduction...

In the medical industry, zwitterionic brushes have received significant attention owing to their antifouling effect that arose from hydration ability. However, sufficient understanding of dynamics is required fabricate precisely controlled devices. this paper, we successfully show hydration, interaction between water molecules and brushes, its can be evaluated logically quantitatively using (i) contact angle, (ii) molecular simulation, (iii) Raman spectroscopy. Based on intuitive results...

Despite the many advantages of poly (methyl methacrylate) (PMMA) as a dental polymer, its antifungal and antibacterial effects remain limited. Here, phytoncide was incorporated into PMMA to inhibit fungal biofilm accumulation without impairing basic biological properties PMMA. A variable amount (0 wt % 5 %) PMMA, material microhardness, flexural strength gloss were evaluated. In addition, cell viability confirmed by MTT assay. This assay measures via metabolic activity, color intensity...

The aim of this study is to investigate the resistance various fluoride-releasing restorative materials against demineralization and remineralization enamel surfaces, including those that have been recently introduced market. Three different were considered: glass ionomer (FI), resin-modified (RL), an alkasite material (CN). acid neutralization ability was investigated using pH measurement, concentrations released fluoride calcium ions measured. Finally, effects observed a microhardness...

Two strains of gram-negative, catalase- and oxidase-positive, coccus-shaped bacteria, designated NB88(T) LNB004, were isolated from activated sludge in the Mae-san sewage treatment plant South Korea. They characterized a polyphasic taxonomic study based on phenotypic, phylogenetic genotypic approaches. Comparative 16S rRNA gene sequence analysis indicated that LNB004 represented novel subline within genus Paracoccus family Rhodobacteraceae. According to comparisons, indistinguishable showed...

Abstract Colonization of auto-polymerized acrylic resin by pathogenic Candida albicans is a common problem for denture users. In this study, zinc-modified phosphate-based glass was introduced into an at concentrations 3, 5, and 7 wt.%. The mechanical or physical properties (flexural strength, elastic modulus, microhardness, contact angle), surface morphology the resultant materials, antimicrobial effect on C. were investigated. There no statistical differences in between control samples ( p...

The optimization of strontium-substituted phosphate-based glass (PSr) can augment the bioactive cellular response by enhancing osteogenic differentiation and resisting pro-inflammatory cytokine improve regenerative healing response.

Dental composite resins are widely used in dental restorations. However, their clinical application is limited by the occurrence of secondary caries. Strontium-modified phosphate-based glass (Sr-PBG) a material known to have sustainable bacterial resistance effect. The mechanical properties (in particular, flexural strength, modulus elasticity, and hardness) materials determine function. Therefore, this study aimed investigate ion-releasing as well effect bioactive resin composites...

Since pits and fissures are the areas most commonly affected by caries due to their structural irregularity, bioactive resin-based sealant (RBS) may contribute prevention of secondary caries. This study aims investigate mechanical, physical, ion-release, enamel remineralisation, antibacterial capabilities novel RBS with glass (BAG) 2-methacryloyloxyethyl phosphorylcholine (MPC). For synthesis, 12.5 wt% BAG 3 MPC were incorporated into RBS. The contact angle, flexural strength, water...

Poly (methyl methacrylate) (PMMA) is a commonly used denture material with poor antimicrobial effects. This study investigated the effects of PMMA-containing silver-phosphate glass. We fabricated novel comprising Then, microhardness, flexural strength, and gloss unit were analyzed. Antimicrobial activity against Streptococcus mutans Candida albicans was investigated. Colony-forming units counted, rates measured. Biocompatibility tests performed using colorimetric MTT assay for evaluating...

The objective of this study was to evaluate xenograft degradation velocity when treated with 4-hexylresorcinol (4HR). scapula a cow purchased from local grocery, and discs (diameter 8 mm, thickness 1 mm) were prepared by trephine bur. Discs 4HR used as the experimental group. Untreated control. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), antibacterial test, endotoxin scanning electron microscopy (SEM) performed on discs. In vivo evaluated rat calvarial defect...

We aimed to evaluate the antimicrobial effects of Glycyrrhiza uralensis extract on Streptococcus mutans and Candida albicans its biocompatibility for dental applications. The activity G. extracts at concentrations 50, 100, 150, 200 µg/mL was assessed using agar disk diffusion tests, counting total number colony-forming units (CFUs), spectrophotometric growth inhibitory assays, microbial morphology observations scanning electron microscopy (SEM; Merin, Carl Zeiss, Oberkochen, Germany)....

어린이 먹거리 안전관리를 위한 목적으로 경기지역 6개 도시 12개소의 어린이집을 대상으로 여름철과 겨울철에 각각 5일간 현지 출장하였으며, 실측량 기록법으로 단체급식에 제공되는 식품의 섭취량을 조사하였고 총 601건의 시료를 수거하여 식품 중 나트륨 조사?연구하였다. 조사결과 어린이집의 한 끼니 당 평균 섭취량은 582.2 ㎎으로 세계보건기구와 세계농업기구(WHO/FAO)의 성인 섭취 권장량의 2,000 ㎎/1일의 29.1%를 차지하고 있었으며, 본 연구의 조사대상이 어린이임을 고려하면 매우 높은 양이다. 섭취에 가장 영향을 미치는 식품군은 국 및 탕류로 어린이집 섭취량의 35.7%를 차지하는 것으로 나타났다. 따라서 국에서 섭취를 줄이는 방법이 어린이집에서 효율적인 저감화가 될 사료된다. 겨울철의 572.3 ㎎, 592.3 나타나 섭취량이 나타났으나 유의적 차이는 없었으며, 지역특성에 따른 공단지역이 696.4㎎으로 나타났고, 적은 지역은 아파트단지로서 514.3 ㎎이었다....

Abstract We incorporated zwitterionic materials into light-curable fluoride varnish (LCFV) in order to inhibit biofilm accumulation and prevent dental caries, the properties of LCFV with three different materials, namely, 2-methacryloyloxyethyl phosphorylcholine (MPC), carboxybetaine methacrylate (CBMA), sulfobetaine (SBMA) polymers (each at a weight percentage 3%), were compared; unmodified without any material was used as control. Material including film thickness degree conversion (DC)...

This study analyzed the antimicrobial, cytotoxic, and antioxidant properties of Cnidiumofficinale (CO) extracts to confirm their antimicrobial activity toward oral microorganisms. The control group contained 0 μg/mL CO, experimental groups 50, 100, 150, 200 CO. To antibacterial CO against microorganisms in cavity, an inhibition zone test, a colony-forming unit (CFU) analysis, optical density (OD) evaluation, SEM (scanning electron microscopy) analysis were performed. A cytotoxicity test was...

The biomechanical effects of dental tissue according to various crown materials were investigated using finite element analysis. Bone, prepared tooth, root canal, and periodontal ligament modeled based on computed tomography. Depending the characteristics material, it was classified into zirconia, hybrid ceramic, gold alloy, acrylic resin. A loading force 200 N applied in vertical direction occlusal surface crown, analysis performed under condition that all interfaces tied. results...

Abstract Acrylic resins are widely used as the main components in removable orthodontic appliances. However, poor oral hygiene and maintenance of appliances provide a suitable environment for growth pathogenic microorganisms. In this study, strontium-modified phosphate-based glass (Sr-PBG) was added to acrylic resin at 0% (control), 3.75%, 7.5%, 15% by weight evaluate surface physicochemical properties novel material its vitro antifungal effect against Candida albicans (C. albicans) ....

For practical multimedia streaming services in home networks, seamless binding between two stream formats (digital video (DV) and MPEG-4), on heterogeneous protocols (IEEE 1394 Ethernet), is required. IEEE the best way for real-time transmission of high bandwidth audio/video (A/V) content inside a home, Ethernet provides connection to anywhere, not only homes, but also outside by using wired or wireless mobile solutions, however, because differences solutions (DV-IEEE MPEG-4-Ethernet), an...

In May 2011, five consecutive gastroenteritis outbreaks were reported at schools in Gyeonggi-do. Epidemiological inspection revealed that one food manufacture company provided 'Kimchi', a traditional Korean side-dish, to these for catering services. Fecal specimens collected from students and food-handlers determine causative viral agents. Norovirus genogroup GI was detected 58 samples out of total 239 by reverse-transcription (RT)-PCR, whereas norovirus GII found only sample. studies also...