scholarly journals Antimicrobial and Substantivity Properties of Silver Nanoparticles against Oral Microbiomes Clinically Isolated from Young and Young-Adult Patients

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
León Francisco Espinosa-Cristóbal ◽  
Carolina Holguín-Meráz ◽  
Erasto Armando Zaragoza-Contreras ◽  
Rita Elizabeth Martínez-Martínez ◽  
Alejandro Donohue-Cornejo ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Young Adult ◽  
Dental Caries ◽  
Periodontal Disease ◽  
Dental Plaque ◽  
Bacterial Species ◽  
Inhibitory Effect ◽  
Oral Bacteria ◽  
Oral Microbiome ◽  
Oral Biofilms

The dental plaque is an oral microbiome hardly associated to be the etiological agent of dental caries and periodontal disease which are still considered serious health public problems. Silver nanoparticles (AgNPs) have demonstrated to have good antimicrobial properties affecting a wide variety of microorganisms, including oral bacteria; however, there is no scientific information that has evaluated the antimicrobial effect of AgNPs against clinical oral biofilms associated with dental caries and periodontal disease. The aim of this study was to determine the antimicrobial and substantivity effects of AgNPs in oral biofilms isolated clinically from patients with dental caries and periodontal disease. Sixty-seven young and young-adult subjects with dental caries and periodontal disease were clinically sampled through the collection of subgingival dental plaque. The inhibitory effect of AgNPs was performed with standard microbiological assays by triplicate using two sizes of particle. Polymerase chain reaction (PCR) assay was used to identify the presence of specific bacterial species. All AgNPs showed an inhibitory effect for all oral biofilms for any age and, generally, any gender (p>0.05); however, the effectiveness of the antimicrobial and substantivity effects was related to particle size, time, and gender (p<0.05). The identified microorganisms were S. mutans, S. sobrinus, S. sanguinis, S. gordonii, S. oralis, P. gingivalis, T. forsythia, and P. intermedia. The AgNPs could be considered as a potential antimicrobial agent for the control and prevention of dental caries and periodontal disease.

scholarly journals Antimicrobial Activity of Silver Nanoparticles against Clinical Biofilms from Patients with and without Dental Caries

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Alondra Jaqueline Jiménez-Ramírez ◽  
Rita Elizabeth Martínez-Martínez ◽  
José Luis Ayala-Herrera ◽  
Erasto Armando Zaragoza-Contreras ◽  
Rubén Abraham Domínguez-Pérez ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Dental Caries ◽  
Dental Plaque ◽  
Scientific Information ◽  
Antimicrobial Properties ◽  
Inhibitory Effect ◽  
Oral Bacteria ◽  
Oral Disease ◽  
Microbiological Analysis

Dental caries is an infectious oral disease originated by the presence of different microorganisms from well-defined biofilms. Many treatments for dental caries have been demonstrated to be successful protocols; however, incidence and prevalence remain still high. Although silver nanoparticles (AgNPs) have shown excellent antimicrobial properties, even against different oral bacteria, there is no available scientific information that has evaluated the antimicrobial activity of AgNPs against oral biofilms from subjects with active dental caries. The objective of this research was to evaluate the inhibitory effect of AgNPs in dental biofilms from subjects with and without dental caries. Two sizes of AgNPs were prepared and characterized. Dental plaque samples were collected from 30 subjects with dental caries and 30 subjects with no dental caries. Microbiological analysis was determined by the minimum inhibitory concentration (MIC) of nanoparticles, and the presence and distribution of microbial strains were identified by polymerase chain reaction (PCR) assay. AgNPs had significant antimicrobial effects against all samples of dental plaque; however, the physical properties of AgNPs, as well as specific sociodemographic and clinical conditions from patients, were also associated with bacterial growth inhibition of Ag particles ( p < 0.05 ). PCR confirmed the presence of oral bacteria associated with dental caries, such as S. mutans and S. sobrinus strains, principally. The AgNPs exhibited great potential to be used as an antimicrobial therapy for the control and prevention of dental caries.

scholarly journals Randomized Controlled Study to Evaluate Microbial Ecological Effects of CPP-ACP and Cranberry on Dental Plaque

2019 ◽  
Vol 5 (2) ◽  
pp. 118-126
Author(s):  
N. Philip ◽  
S.J. Leishman ◽  
H.M.H.N. Bandara ◽  
D.L. Healey ◽  
L.J. Walsh
Keyword(s):  
Randomized Controlled Trial ◽  
Calcium Phosphate ◽  
Dental Caries ◽  
Amorphous Calcium Phosphate ◽  
Dental Plaque ◽  
Controlled Trial ◽  
Bacterial Species ◽  
Oral Microbiome ◽  
Randomized Controlled ◽  
Casein Phosphopeptide

Introduction: Ecological approaches to dental caries prevention play a key role in attaining long-term control over the disease and maintaining a symbiotic oral microbiome. Objectives: This study aimed to investigate the microbial ecological effects of 2 interventional dentifrices: a casein phosphopeptide–amorphous calcium phosphate (CPP-ACP) dentifrice and the same dentifrice supplemented with a polyphenol-rich cranberry extract. Methods: The interventional toothpastes were compared with each other and with an active control fluoride dentifrice in a double-blinded randomized controlled trial. Real-time quantitative polymerase chain reaction (qPCR) analysis was used to determine changes in the bacterial loads of 14 key bacterial species (8 caries associated and 6 health associated) in the dental plaque of trial participants after they used the dentifrices for 5 to 6 wk. Results: From the baseline to the recall visit, significant differences were observed between the treatment groups in the bacterial loads of 2 caries-associated bacterial species ( Streptococcus mutans [ P < 0.001] and Veillonella parvula [ P < 0.001]) and 3 health-associated bacterial species ( Corynebacterium durum [P = 0.008], Neisseria flavescens [ P = 0.005], and Streptococcus sanguinis [ P < 0.001]). Compared to the fluoride control dentifrice, the CPP-ACP dentifrice demonstrated significant differences for S. mutans ( P = 0.032), C. durum ( P = 0.007), and S. sanguinis ( P < 0.001), while combination CPP-ACP–cranberry dentifrice showed significant differences for S. mutans ( P < 0.001), V. parvula ( P < 0.001), N. flavescens ( P = 0.003), and S. sanguinis ( P < 0.001). However, no significant differences were observed in the bacterial load comparisons between the CPP-ACP and combination dentifrices for any of the targeted bacterial species ( P > 0.05). Conclusions: Overall, the results indicate that dentifrices containing CPP-ACP and polyphenol-rich cranberry extracts can influence a species-level shift in the ecology of the oral microbiome, resulting in a microbial community less associated with dental caries (Australian New Zealand Clinical Trial Registry ANZCTR 12618000095268). Knowledge Transfer Statement: The results of this randomized controlled trial indicate that dentifrices containing casein phosphopeptide–amorphous calcium phosphate (CPP-ACP) and polyphenol-rich cranberry extracts were able to beneficially modulate the microbial ecology of dental plaque in a group of high caries-risk patients. This could contribute toward lowering the risk of developing new caries lesions, an important goal sought by patients, clinicians, and policy makers.

scholarly journals A Critical Role for Extracellular DNA in Dental Plaque Formation

2016 ◽  
Vol 96 (2) ◽  
pp. 208-216 ◽  
Author(s):  
N. Rostami ◽  
R.C. Shields ◽  
S.A. Yassin ◽  
A.R. Hawkins ◽  
L. Bowen ◽  
...  
Keyword(s):  
Dental Implants ◽  
Dental Plaque ◽  
Artificial Saliva ◽  
Bacterial Species ◽  
Critical Role ◽  
Oral Bacteria ◽  
Extracellular Dna ◽  
Common Component ◽  
Oral Biofilms

Extracellular DNA (eDNA) has been identified in the matrix of many different monospecies biofilms in vitro, including some of those produced by oral bacteria. In many cases, eDNA stabilizes the structure of monospecies biofilms. Here, the authors aimed to determine whether eDNA is an important component of natural, mixed-species oral biofilms, such as plaque on natural teeth or dental implants. To visualize eDNA in oral biofilms, approaches for fluorescently stained eDNA with either anti-DNA antibodies or an ultrasensitive cell-impermeant dye, YOYO-1, were first developed using Enterococcus faecalis, an organism that has previously been shown to produce extensive eDNA structures within biofilms. Oral biofilms were modelled as in vitro “microcosms” on glass coverslips inoculated with the natural microbial population of human saliva and cultured statically in artificial saliva medium. Using antibodies and YOYO-1, eDNA was found to be distributed throughout microcosm biofilms, and was particularly abundant in the immediate vicinity of cells. Similar arrangements of eDNA were detected in biofilms on crowns and overdenture abutments of dental implants that had been recovered from patients during the restorative phase of treatment, and in subgingival dental plaque of periodontitis patients, indicating that eDNA is a common component of natural oral biofilms. In model oral biofilms, treatment with a DNA-degrading enzyme, NucB from Bacillus licheniformis, strongly inhibited the accumulation of biofilms. The bacterial species diversity was significantly reduced by treatment with NucB and particularly strong reductions were observed in the abundance of anaerobic, proteolytic bacteria such as Peptostreptococcus, Porphyromonas and Prevotella. Preformed biofilms were not significantly reduced by NucB treatment, indicating that eDNA is more important or more exposed during the early stages of biofilm formation. Overall, these data demonstrate that dental plaque eDNA is potentially an important target for oral biofilm control.

scholarly journals Comparison of oral microbiome profiles in 18-month-old infants and their parents

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ryutaro Jo ◽  
Kazuma Yama ◽  
Yuto Aita ◽  
Kota Tsutsumi ◽  
Chikako Ishihara ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Dental Caries ◽  
Oral Bacteria ◽  
Oral Microbiome ◽  
Commensal Bacteria ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Deciduous Dentition ◽  
The Difference ◽  
Generation Sequencing

AbstractThe onset and progress of dental caries and periodontal disease is associated with the oral microbiome. Therefore, it is important to understand the factors that influence oral microbiome formation. One of the factors that influence oral microbiome formation is the transmission of oral bacteria from parents. However, it remains unclear when the transmission begins, and the difference in contributions of father and mother. Here, we focused on the oral microbiome of 18-month-old infants, at which age deciduous dentition is formed and the oral microbiome is likely to become stable, with that of their parents. We collected saliva from forty 18-month-old infants and their parents and compared the diversity and composition of the microbiome using next-generation sequencing of 16S rRNA genes. The results showed that microbial diversity in infants was significantly lower than that in parents and composition of microbiome were significantly different between infants and parents. Meanwhile, the microbiome of the infants was more similar to that of their mothers than unrelated adults. The bacteria highly shared between infants and parents included not only commensal bacteria but also disease related bacteria. These results suggested that the oral microbiome of the parents influences that of their children aged < 18 months.

scholarly journals Identification of the Bacterial Biosynthetic Gene Clusters of the Oral Microbiome Illuminates the Unexplored Social Language of Bacteria during Health and Disease

mBio ◽  
2019 ◽  
Vol 10 (2) ◽  
Author(s):  
Gajender Aleti ◽  
Jonathon L. Baker ◽  
Xiaoyu Tang ◽  
Ruth Alvarez ◽  
Márcia Dinis ◽  
...  
Keyword(s):  
Dental Caries ◽  
Small Molecules ◽  
Gene Clusters ◽  
Signaling Molecules ◽  
Oral Bacteria ◽  
Oral Microbiome ◽  
Communication Media ◽  
Biosynthetic Gene ◽  
Colonization Resistance ◽  
Biosynthetic Gene Clusters

ABSTRACT Small molecules are the primary communication media of the microbial world. Recent bioinformatic studies, exploring the biosynthetic gene clusters (BGCs) which produce many small molecules, have highlighted the incredible biochemical potential of the signaling molecules encoded by the human microbiome. Thus far, most research efforts have focused on understanding the social language of the gut microbiome, leaving crucial signaling molecules produced by oral bacteria and their connection to health versus disease in need of investigation. In this study, a total of 4,915 BGCs were identified across 461 genomes representing a broad taxonomic diversity of oral bacteria. Sequence similarity networking provided a putative product class for more than 100 unclassified novel BGCs. The newly identified BGCs were cross-referenced against 254 metagenomes and metatranscriptomes derived from individuals either with good oral health or with dental caries or periodontitis. This analysis revealed 2,473 BGCs, which were differentially represented across the oral microbiomes associated with health versus disease. Coabundance network analysis identified numerous inverse correlations between BGCs and specific oral taxa. These correlations were present in healthy individuals but greatly reduced in individuals with dental caries, which may suggest a defect in colonization resistance. Finally, corroborating mass spectrometry identified several compounds with homology to products of the predicted BGC classes. Together, these findings greatly expand the number of known biosynthetic pathways present in the oral microbiome and provide an atlas for experimental characterization of these abundant, yet poorly understood, molecules and socio-chemical relationships, which impact the development of caries and periodontitis, two of the world’s most common chronic diseases. IMPORTANCE The healthy oral microbiome is symbiotic with the human host, importantly providing colonization resistance against potential pathogens. Dental caries and periodontitis are two of the world’s most common and costly chronic infectious diseases and are caused by a localized dysbiosis of the oral microbiome. Bacterially produced small molecules, often encoded by BGCs, are the primary communication media of bacterial communities and play a crucial, yet largely unknown, role in the transition from health to dysbiosis. This study provides a comprehensive mapping of the BGC repertoire of the human oral microbiome and identifies major differences in health compared to disease. Furthermore, BGC representation and expression is linked to the abundance of particular oral bacterial taxa in health versus dental caries and periodontitis. Overall, this study provides a significant insight into the chemical communication network of the healthy oral microbiome and how it devolves in the case of two prominent diseases.

scholarly journals Oral Health Literacy and Oral Health Status among Undergraduate University Students

2021 ◽  
Vol 6 (2) ◽  
pp. 13-22
Author(s):  
Azlan Jaafar ◽  
Normaliza AB Malik ◽  
aws hashim ali alkadhim
Keyword(s):  
Health Status ◽  
Oral Health ◽  
Health Literacy ◽  
Dental Caries ◽  
Periodontal Disease ◽  
Undergraduate Students ◽  
Dental Plaque ◽  
Oral Health Status ◽  
Weak Correlation ◽  
Oral Health Literacy

Objective: To identify the prevalence of caries, plaque score, and periodontal disease and explore the correlations between oral health literacy scores and oral health status among undergraduate students. Materials and Methods: A cross-sectional study was conducted with a group of undergraduate students using the Malay version of the Oral Health Literacy (OHL) Index. A stratified random sampling technique was used to select the samples. Clinical oral examinations were conducted by a single trained examiner using a Community Periodontal Index (CPI) probe and a mouth mirror. Data analysis was conducted using statistical tests contained in SPSS version 26, and statistical significance was set at p<0.05. Results: A total of 280 students were recruited into the study. The prevalence of caries and periodontal disease was 58.9 and 13.2%, respectively. There was a significant association between OHL and field of study (p<0.001). There was also a significant negative but weak correlation between OHL and dental plaque scores (r= -0.147; p=0.014). A significant positive but weak correlation was found between dental plaque scores and dental caries (r= 0.135; p=0.024) and periodontal pocket depth (r= 0.168; p=0.005). Conclusion: The prevalence of dental caries was high, while the prevalence of periodontal diseases was low in this study. OHL correlated significantly with dental plaque scores and field of the study. Thus, OHL assessment is essential to understand a person’s OHL levels and can be considered a screening tool for early detection of poor oral hygiene.

scholarly journals Acquisition of Oral Microbes and Associated Systemic Responses of Newborn Nonhuman Primates

2013 ◽  
Vol 21 (1) ◽  
pp. 21-28 ◽  
Author(s):  
J. L. Ebersole ◽  
S. C. Holt ◽  
J. E. Delaney
Keyword(s):  
Risk Measures ◽  
Bacterial Species ◽  
Serum Antibody ◽  
Oral Bacteria ◽  
Oral Microbiome ◽  
Primate Model ◽  
Content Type ◽  
Oral Microbes ◽  
Antibody Levels ◽  
Relationship Of

ABSTRACTThe acquisition and development of the complex oral microbiome remain ill defined. While selected species of oral bacteria have been examined in relation to their initial colonization in neonates, a more detailed understanding of the dynamics of the microbiome has been developed only in adults. The current investigation used a nonhuman primate model to document the kinetics of colonization of the oral cavities of newborns and infants by a range of oral commensals and pathogens. Differences in colonization were evaluated in newborns from mothers who were maintained on an oral hygiene regimen pre- and postparturition with those displaying naturally acquired gingivitis/periodontitis. The results demonstrate distinct profiles of acquisition of selected oral bacteria, with the transmission of targeted pathogens,Porphyromonas gingivalisandAggregatibacter actinomycetemcomitans, being passed on primarily from mothers with gingivitis/periodontitis. This colonization resulted in defined patterns of systemic antibody responses in the infants. The significant relative risk measures for infection with the pathogens, as well as the relationship of oral infection and blood serum antibody levels, were consistent with those of the newborns from mothers with gingivitis/periodontitis. These findings indicate that the early acquisition of potentially pathogenic oral bacterial species might impact the development of mucosal responses in the gingiva and may provide an enhanced risk for the development of periodontitis later in life.

scholarly journals Genetic Analysis of Mutacin B-Ny266, a Lantibiotic Active against Caries Pathogens

2020 ◽  
Vol 202 (12) ◽  
Author(s):  
Delphine Dufour ◽  
Abdelahhad Barbour ◽  
Yuki Chan ◽  
Marcus Cheng ◽  
Taimoor Rahman ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Dental Plaque ◽  
Oral Bacteria ◽  
Oral Streptococci ◽  
Chromosomal Locus ◽  
Content Type ◽  
Genes Encoding ◽  
Plaque Biofilm

ABSTRACT Bacteriocins are ribosomally synthesized proteinaceous antibacterial peptides. They selectively interfere with the growth of other bacteria. The production and secretion of bacteriocins confer a distinct ecological advantage to the producer in competing against other bacteria that are present in the same ecological niche. Streptococcus mutans, a significant contributor to the development of dental caries, is one of the most prolific producers of bacteriocins, known as mutacins in S. mutans. In this study, we characterized the locus encoding mutacin B-Ny266, a lantibiotic with a broad spectrum of activity. The chromosomal locus is composed of six predicted operon structures encoding proteins involved in regulation, antimicrobial activity, biosynthesis, modification, transport, and immunity. Mutacin B-Ny266 was purified from semisolid cultures, and two inhibitory peptides, LanA and LanA′, were detected. Both peptides were highly modified. Such modifications include dehydration of serine and threonine and the formation of a C-terminal aminovinyl-cysteine (AviCys) ring. While LanA peptide alone is absolutely required for antimicrobial activity, the presence of LanA′ enhanced the activity of LanA, suggesting that B-Ny266 may function as a two-peptide lantibiotic. The activation of lanAA′ expression is most likely controlled by the conserved two-component system NsrRS, which is activated by LanA peptide but not by LanA′. The chromosomal locus encoding mutacin B-Ny266 was not universally conserved in all sequenced S. mutans genomes. Intriguingly, the genes encoding LanAA′ peptides were restricted to the most invasive serotypes of S. mutans. IMPORTANCE Although dental caries is largely preventable, it remains the most common and costly infectious disease worldwide. Caries is initiated by the presence of dental plaque biofilm that contains Streptococcus mutans, a species extensively characterized by its role in caries development and formation. S. mutans deploys an arsenal of strategies to establish itself within the oral cavity. One of them is the production of bacteriocins that confer a competitive advantage by targeting and killing closely related competitors. In this work, we found that mutacin B-Ny266 is a potent lantibiotic that is effective at killing a wide array of oral streptococci, including nearly all S. mutans strains tested. Lantibiotics produced by oral bacteria could represent a promising strategy to target caries pathogens embedded in dental plaque biofilm.

Antimicrobial and Antibiofilm Activity of Citral and its Derivative against Microflora from Dental Plaque

2020 ◽  
Vol 5 (2) ◽  
pp. 120-126
Author(s):  
S.V. Ambade ◽  
N.M. Deshpande ◽  
S.S. Kale ◽  
V.N. Ambade
Keyword(s):  
Dental Caries ◽  
Essential Oil ◽  
Dental Plaque ◽  
Biofilm Formation ◽  
Periodontal Diseases ◽  
Bacterial Species ◽  
Antibiofilm Activity ◽  
Oral Microflora ◽  
Lemon Grass ◽  
First Time

Dental biofilms inhabit the oral cavity in form of dental plaque which then causes dental caries and periodontal diseases worldwide. Lemon grass essential oil (LGEO) has been reported to exhibit antimicrobial and antibiofilm activity against. This study represents the potential of citral and derivatives as antimicrobial and antibiofilm agent against dental microflora. Three bacterial species chiefly responsible for biofilm formation, and five prime colonizer of dental plaque were selected to represent dental microflora. Citral and its derivative viz. citral semicarbazone, exhibited antimicrobial and antibiofilm activity against the selected organisms. For the first time, any citral derivative has ever demonstrated to exhibit antimicrobial and antibiofilm activity against the oral microflora. However, study could not established citral or its derivatives as more effective, powerful and better herbal material as compared to LGEO to control the oral microflora associated with dental plaque.

scholarly journals Caries and periodontal disease: Two diseases, one biofilm

2005 ◽  
Vol 26 (3) ◽  
pp. 110 ◽  
Author(s):  
Annetta K L Tsang ◽  
Saso Ivanovski ◽  
Philip S Bird
Keyword(s):  
Dental Caries ◽  
Periodontal Disease ◽  
Dental Plaque ◽  
Periodontal Diseases ◽  
Host Susceptibility ◽  
Alternative View ◽  
Oral Biofilm ◽  
Number Of Factors ◽  
Oral Ecology ◽  
Diverse Microbial Community

Dental plaque, a natural oral biofilm is involved in the aetiology of dental caries and periodontal disease. Despite decades of research, the microbiology, aetiology and pathogenesis of these diseases remain controversial. A number of factors interplay in these diseases, the indigenous microbes that inhabit the oral cavity, diet, host susceptibility and time. The ?Non-Specific Plaque Hypothesis? (NSPH) was proposed where the overall mass of plaque interacted with the host and caused disease. An alternative view was the ?Specific Plaque Hypothesis? (SPH) where, among the diverse microbial community, a limited subset of specific bacteria were associated with disease. In recent years, the ?Ecological Plaque Hypothesis? (EPH) has been proposed that it be recognised that the oral ecology as a whole contributes to the aetiology of dental caries and periodontal diseases, with shifts in the composition of microbial communities being of particular importance.

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