Nanoparticles in Dentistry—Current Literature Review

Interest in the topic of nanoparticles (NPs) and nanomaterials used in dentistry is growing in research as well as clinical settings. In recent years, an increasing number of nanomaterials have been developed and tested, enabling novel solutions unavailable in dentistry before. The aim of the article is to review the current status of knowledge regarding NPs used in modern dentistry. The analysis was made using Science Direct, PubMed and Scopus databases, and articles were selected based on relevance and topicality. The exclusion criteria determining timeliness consisted of a selection of essential works on this topic no older than 2017. Regarding appropriateness, only studies on nanoparticles in the field of dentistry were considered, and were categorized into three subtopics: antimicrobial NPs, therapeutic NPs, material property improving NPs. Each category was further divided into specific groups focusing on the clinical use of the particles. Inside every section, analysis concerning the current state of knowledge about the use and properties of nanoparticles within specific material groups was conducted. Additionally, within this article, common and rising trends in the NPs field were analyzed; additionally, based on novel NPs approaches, possible future applications and dangers were considered

Influence of Freeze-Dried Diet on Oral Hygiene Indicators in Strict Isolation Condition of an Analog Space Mission

Analog space missions were created to study the human factor in extraordinary conditions that would occur in future space habitats. Isolation has been shown to cause stress and disrupt individuals’ daily routine, which can also affect their oral hygiene and lead to an increased risk of dental caries and gingivitis. The astronauts’ specific freeze-dried diet is associated with “lazy” chewing, potential dehydration and vitamin A deficiency, which may adversely affect their saliva. The aim of this study is to investigate the influence of the freeze-dried diet on selected oral hygiene indicators in analog astronauts (AA) enduring strict isolation conditions during six consecutive analog space missions at the LunAres Research Station. During the experiment the oral hygiene and gingival inflammation status measurements were conducted on the group of AAs at the beginning and at the end of each mission. Measurements included four oral hygiene indicators: API, sOHI, PI by Silness and Loe and GBI by Ainamo and Bay. Each AA’s individual scores were noted and analyzed. Statistically significant reduction in the amount of plaque and intensity of gingival bleeding was observed over the course of the study, which could indicate positive results of applied oral hygiene procedures despite unfavorable dietary and stressful isolation conditions