This study aimed to determine the effects of low-temperature plasma jet produced in gas helium (LTP-helium) on cariogenic biofilms composedby and , and also by the combination of and . Biofilms were treated for 1, 3, 5, and 7 minutes. A 0.12% chlorhexidine solution was used as the positive control and sterile physiologic solution was the negative control. Biofilm viability was analyzed by viable cell recovery, scanning electron microscopy, and confocal laser scanning microscopy. All assays were performed intriplicate in three independent experiments. Multispecies biofilms exposed to LTP-helium had a significant reduction in viability when compared to the negative control (p < 0.0001). For biofilm formedby , and , LTP treatments for 5 and 7 minutes caused similar reduction of morethan 2 log. Also, a significant reduction in the viability of biofilms formedby , and was detected (p < 0.0001). In conclusion, LTP-helium reduced theviability of cariogenic biofilms with different microbial compositions, which indicates that LTP-helium is a potential tool for developing new protocols for dental caries prevention and treatment.
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http://dx.doi.org/10.1080/20002297.2024.2397831 | DOI Listing |
Nanoscale
December 2024
Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China.
Dental caries, as the predominant global oral disease, remains a critical public health issue worldwide, particularly in socioeconomically disadvantaged communities. However, common caries prevention approaches (, oral health education, mechanical plaque removal, and delivery of fluoride agents) are still insufficient for optimal caries management, and therefore, alternative regimens that can supplement existing strategies are highly warranted. Nanomaterials exhibit considerable potential in combating cariogenic pathogens and biofilms owing to their promising antimicrobial capacity, improved penetration into biofilms, targeted precision delivery, and versatile physicochemical properties.
View Article and Find Full Text PDFBiofilm
December 2024
Department of Preventive Dentistry, School of Dentistry, Jeonbuk National University, Jeonju, Republic of Korea.
Bacterial biofilms are highly structured surface associated architecture of micro-colonies, which are strongly bonded with the exopolymeric matrix of their own synthesis. These exopolymeric substances, mainly exopolysaccharides (EPS) initially assist the bacterial adhesion and finally form a bridge over the microcolonies to protect them from environmental assaults and antimicrobial exposure. Bacterial cells in dental biofilm metabolize dietary carbohydrates and produce organic acids.
View Article and Find Full Text PDFmSphere
December 2024
School of Engineering, Newcastle University, Newcastle upon Tyne, United Kingdom.
Mathematical models can provide insights into complex interactions and dynamics within microbial communities to complement and extend experimental laboratory approaches. For dental biofilms, they can give a basis for evaluating biofilm growth or the transition from health to disease. We have developed mathematical models to simulate the transition toward a cariogenic microbial biofilm, modeled as the overgrowth of within a five-species dental community.
View Article and Find Full Text PDFArch Oral Biol
October 2024
Department of Microbiology, Panjab University, Chandigarh 160014, India. Electronic address:
Photochem Photobiol Sci
December 2024
Department of Health Sciences and Pediatric Dentistry, Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas (UNICAMP), P.O. BOX 52, Av. Limeira, 901, Piracicaba, SP, 13414-903, Brazil.
The study aimed to assess the impact of combining potassium iodide (KI) with methylene blue (MB) in antimicrobial photodynamic therapy (aPDT) within an oral biofilm formed in situ. A single-phase, 14 days in situ study involved 21 volunteers, who wore a palatal appliance with 8 bovine dentin slabs. These slabs were exposed to a 20% sucrose solution 8 times a day, simulating a high cariogenic challenge.
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