scispace - formally typeset
Search or ask a question

Answers from top 6 papers

More filters
Papers (6)Insight
Ceramic polishing may be required in clinical situations where ceramic restorations are accidentally exposed to bleaching gels.
The three-step method is a useful tool for developing future guidelines to assess the ability of wipes to disinfect surfaces.
It could therefore be used to disinfect surfaces in hospital and community settings.
The results of this study may be used to design effective measures to disinfect biofilms on equipment contact surfaces.
The successful outcome of ceramic-on-ceramic artificial joint prostheses may be attributed to the low biological activity of ceramic particles, as evidenced here.
Their development in the ceramic may lead to wear and failure of the ceramic cutting plates.

See what other people are reading

What is the advantage of using 58S in bone tşssue engineering applications?
6 answers
The utilization of 58S bioactive glass in bone tissue engineering applications offers several advantages, primarily due to its unique properties that align well with the requirements for successful bone regeneration and repair. One of the primary benefits is its high bioactivity, which facilitates the bonding of the scaffold to bone tissue, as demonstrated by the formation of hydroxyapatite, a key mineral in bone, upon immersion in simulated body fluid (SBF). This bioactivity is crucial for the integration of the scaffold with the native bone, promoting the regeneration process. Moreover, 58S bioactive glass scaffolds exhibit favorable biodegradability rates, which are essential for ensuring that the scaffold degrades at a rate compatible with new bone formation. This characteristic allows for the gradual transfer of load from the scaffold to the newly formed bone, enhancing the healing process. The ability to tailor the degradation rate through modifications, such as the incorporation of zinc oxide and β-tricalcium phosphate, further underscores the versatility of 58S bioactive glass in meeting diverse clinical needs. The mechanical properties of 58S bioactive glass scaffolds can also be enhanced through various strategies, such as coating with Zein to improve mechanical strength, or integrating with graphene foam to combine high mechanical stability with excellent bioactivity and biocompatibility. Such modifications expand the potential applications of 58S bioactive glass in load-bearing areas of the body. Additionally, 58S bioactive glass supports cell attachment and proliferation, a critical factor for the success of any bone tissue engineering scaffold. Studies have shown that scaffolds incorporating 58S bioactive glass promote the adhesion and proliferation of osteoblast-like cells, which are essential for bone regeneration. The ability to enhance cellular responses further through the electrospinning process, creating nanofibers that mimic the natural extracellular matrix, highlights the adaptability of 58S bioactive glass to various scaffold fabrication techniques. In summary, the advantages of using 58S bioactive glass in bone tissue engineering applications include its high bioactivity, favorable biodegradability, the potential for mechanical property enhancement, and the support of cell attachment and proliferation. These properties collectively make 58S bioactive glass a highly promising material for the development of scaffolds aimed at bone regeneration and repair.
How does the bleaching process affect the structure and composition of teeth?
5 answers
The bleaching process, particularly with high concentrations of hydrogen peroxide, can have significant effects on the structure and composition of teeth. Studies have shown that bleaching with 35% hydrogen peroxide leads to changes in enamel surface morphology and a decrease in mineral content. Over-bleaching can damage tooth structure by causing morphological irregularities, increased porosity, and altered crystalline shapes in enamel. Different bleaching methods result in distinct molecular profiles, with peroxymonosulfate treatment altering amino acids and dipeptides, while hydrogen peroxide treatment increases alkaloid abundance. Prolonged home bleaching with carbamide peroxide can lead to decreased microhardness and changes in ultrastructure and chemical composition of enamel. Additionally, histological studies have revealed significant morphological changes in enamel and dentin post-bleaching, including cavity formation and enamel separation.
How the properties of molybdenum suboxides varies?
4 answers
The properties of molybdenum suboxides vary based on their stoichiometry and preparation conditions. Different suboxides like MoO3-δ and MoOx (2 < x < 3) exhibit varying thermal stability, decomposition temperatures, and electrical properties. Molybdenum oxides can exist in different oxidation states, allowing for versatile applications in optical, electronic, catalytic, and energy systems. The crystal structure, morphology, and dopants can be manipulated to control electronic states, enhancing their tunability and functionality. These materials show promise in diverse fields such as photodetectors, thermoelectric devices, solar cells, gas sensors, and energy storage, highlighting their potential for high-value research and commercial applications.
What is the implication of increased catalase activity in the jejunum following dehydration?
4 answers
Increased catalase activity in the jejunum following dehydration plays a crucial role in protecting against oxidative damage and maintaining redox balance. Catalase helps in preventing dehydration-related oxidative damage by decreasing hydrogen peroxide levels and lipid peroxidation. In situations of water stress, catalase, particularly cytoplasmic catalase, contributes to the maintenance of intracellular redox balance, enhancing tolerance against dehydration. Additionally, catalase activity may be associated with alterations in outer membrane permeability, impacting the sensitivity to hydrogen peroxide and overall growth under stress conditions. The findings suggest that catalase activity is essential for cellular defense mechanisms during dehydration, highlighting its significance in mitigating oxidative stress and preserving cellular function in the jejunum.
What specific regulations govern the use of additive manufacturing technologies in tissue engineering applications?
4 answers
The regulations governing the use of additive manufacturing (AM) technologies in tissue engineering applications vary across different countries and regions. These regulations stipulate specific requirements for medical device manufacturers to bring their products to market. The regulatory frameworks address aspects such as CE marking, US FDA regulations, and guidelines from countries like Australia, Canada, Brazil, and Japan. Challenges arise due to the disruptive nature of AM and 3D bioprinting technologies, which introduce complexities like incorporating living cells in the fabrication process. Regulators face difficulties in adapting traditional frameworks designed for mass-manufactured therapies to accommodate bespoke solutions in regenerative medicine. Additionally, the legal regime faces challenges in areas such as bioethics, safety, and compliance with regulations like the EU Advanced Therapy Medicinal Products Regulation and the Medical Device Regulation.
How are researchers addressing the challenge of developing biocompatible materials suitable for additive manufacturing applications?
5 answers
Researchers are addressing the challenge of developing biocompatible materials suitable for additive manufacturing applications by focusing on the utilization of novel materials and composites tailored for specific biomedical purposes. Efforts are being made to produce biodegradable polymers and bioplastics derived from renewable resources to replace conventional plastics, thus contributing to a sustainable and circular economy. In healthcare, particularly in dentistry, additive manufacturing is being utilized to create patient-specific implants, dentures, and prosthetic aids, with a keen emphasis on optimizing surface quality, dimensional accuracy, and mechanical properties of the biocompatible materials produced. The design and preparation of biodegradable polymer composites for biomedical additive manufacturing applications are being explored as cost-effective and environmentally friendly alternatives to traditional materials like metals and ceramics.
Can automation help in quality control of a snack house?
5 answers
Automation can significantly aid in enhancing the quality control processes of a snack house. By implementing automated systems like Supervisory Control and Data Acquisition (SCADA), PLC-based control systems, and automated inspection systems, snack producers can monitor and control various parameters crucial for quality, such as process data, packaging, and inspection. Automation reduces manual intervention, streamlines processes, and ensures consistent quality standards. For instance, automated inspection systems can replace manual inspections, improving efficiency and product quality. Additionally, integrating vision systems for surface roughness measurement can further enhance in-line quality control. Overall, automation technologies offer snack houses the opportunity to optimize their operations, enhance product quality, and meet the demands of a competitive market.
Which type of microorganisms is sodium hypochlorite effective?
4 answers
Sodium hypochlorite has demonstrated effectiveness against a variety of microorganisms. Research indicates that sodium hypochlorite can suppress putrefactive microbiota like Bacteroides, Clostridium, Escherichia coli, and Pseudomonas in manure effluents. Additionally, studies have shown that sodium hypochlorite is effective against biofilms of Enterococcus faecalis and Candida albicans, with similar efficacy to calcium hypochlorite. Furthermore, sodium hypochlorite has been found to have higher bactericidal efficacy against biofilms of Staphylococcus aureus and Pseudomonas aeruginosa compared to quaternary ammonium chloride disinfectants. In endodontic therapy, both 5.25% sodium hypochlorite gel and aqueous solution demonstrated comparable antimicrobial effectiveness against primary endodontic lesions. Lastly, sodium hypochlorite has shown bactericidal activity against Methylobacterium radiotolerance biofilms in hemodialysis equipment, even at practical concentrations.
How effective are adsorption-based water filters for water quality for drinking water?
5 answers
Adsorption-based water filters, such as those utilizing powdered activated carbon (PAC) and metal-organic frameworks (MOFs), are highly effective for improving drinking water quality. These filters can efficiently remove taste- and odor-causing compounds, synthetic organic chemicals, heavy metals, and other contaminants from water. Studies have shown that combining PAC with ceramic membranes can significantly enhance the removal of organic pollutants and pharmaceuticals from water, while also mitigating membrane fouling. Additionally, MOF-based adsorbents have been successfully tested in home water filters, meeting stringent reduction thresholds for various metals, ensuring clean and safe drinking water. Overall, adsorption-based water filters offer a reliable and affordable solution for improving water quality and ensuring access to potable water.
What are the chemical properties of chlorine dioxide?
5 answers
Chlorine dioxide (ClO2) exhibits various chemical properties. It is a powerful oxidizing agent that reacts easily with reducing agents, forming chloride, chlorite, and chlorate as end products. In water, ClO2 exists as free radicals and is known for its antimicrobial activity, effectively inactivating a broad spectrum of microorganisms. The compound plays a crucial role in disinfection, destroying bacteria, viruses, and parasites, making it a key component in water treatment processes. Additionally, ClO2 demonstrates a strong oxidizing capability, generating ClO2 gas efficiently by mixing sodium chlorite solution and phosphoric acid, which can effectively inhibit microbial growth under specific conditions. The compound's properties are further characterized by its redox potential and thermodynamic values, which differ significantly from standard chemical thermodynamic properties.
How cfrp waste can be utilised in mortar?
5 answers
CFRP waste can be effectively utilized in mortar to enhance its properties and reduce environmental impact. By incorporating recycled concrete powder (RCP) and spontaneous combustion gangue powder (SCGP) as supplementary materials, the mechanical and durability properties of mortar can be improved, with a suitable combination of 15% RCP and 15% SCGP maintaining comparable mechanical properties to control mixes. Additionally, the use of construction waste micro powder along with various other components like cement, sand, and additives can create construction mortar that reduces environmental pollution and waste. Furthermore, incorporating ceramic waste as a substitute for fine aggregate in mortars can lead to superior results, with 10% ceramic waste showing high strengths and improved microstructural properties. Overall, utilizing CFRP waste in mortar presents a sustainable solution for enhancing performance while reducing environmental impact.