scholarly journals Los biofilms orales y sus consecuencias en la caries dental y enfermedad periodontal

2021 ◽  
Author(s):  
Michelle Morón
Keyword(s):  
Oral Biofilm

Introducción: La cavidad oral es la puerta de entrada al bienestar corporal total, por lo que el microbioma oral influye en la salud general de un individuo. La presencia de microorganismos poseen un desarrollo continuo, las bacterias orales evolucionaron para formar biofilms en las superficies duras de los dientes y en los tejidos blandos que a menudo contienen múltiples especies bacterianas produciendo patologías orales como  la caries dental y enfermedad periodontal.La prevención se logra con la higiene bucal diaria,fluor,arginina y probióticos. Métodos: Se realizó una revisión de artículos científicos en idioma inglés y español en bases de datos científicas utilizando palabras combinadas de las palabras claves: bioflm oral, biofilm oral caries y periodontitis, biofilms periodontitis y caries dental. Conclusiones: El biofilm oral cuando no es controlado va a desarrollar un desequilibrio en la mircobiota oral desarrollando caries dental y enfermedad periodontal.  

scholarly journals Porphyromonas gingivalis fimbrial protein Mfa5 contains a von Willebrand factor domain and an intramolecular isopeptide

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Thomas V. Heidler ◽  
Karin Ernits ◽  
Agnieszka Ziolkowska ◽  
Rolf Claesson ◽  
Karina Persson
Keyword(s):  
Porphyromonas Gingivalis ◽  
Von Willebrand Factor ◽  
Host Cells ◽  
Negative Bacterium ◽  
Oral Biofilm ◽  
Gram Negative ◽  
Type V ◽  
Von Willebrand ◽  
Willebrand Factor ◽  
Fimbrial Protein

AbstractThe Gram-negative bacterium Porphyromonas gingivalis is a secondary colonizer of the oral biofilm and is involved in the onset and progression of periodontitis. Its fimbriae, of type-V, are important for attachment to other microorganisms in the biofilm and for adhesion to host cells. The fimbriae are assembled from five proteins encoded by the mfa1 operon, of which Mfa5 is one of the ancillary tip proteins. Here we report the X-ray structure of the N-terminal half of Mfa5, which reveals a von Willebrand factor domain and two IgG-like domains. One of the IgG-like domains is stabilized by an intramolecular isopeptide bond, which is the first such bond observed in a Gram-negative bacterium. These features make Mfa5 structurally more related to streptococcal adhesins than to the other P. gingivalis Mfa proteins. The structure reported here indicates that horizontal gene transfer has occurred among the bacteria within the oral biofilm.

scholarly journals A Concise Review of Silver Diamine Fluoride on Oral Biofilm

2021 ◽  
Vol 11 (7) ◽  
pp. 3232
Author(s):  
Jingyang Zhang ◽  
Sofiya-Roksolana Got ◽  
Iris Xiaoxue Yin ◽  
Edward Chin-Man Lo ◽  
Chun-Hung Chu
Keyword(s):  
Clinical Study ◽  
Streptococcus Mutans ◽  
Bacterial Adhesion ◽  
Clinical Studies ◽  
Antibacterial Properties ◽  
Tooth Surface ◽  
Original Research ◽  
Laboratory Studies ◽  
Oral Biofilm ◽  
Silver Diamine Fluoride

Studies have shown that silver diamine fluoride (SDF) is an effective agent to arrest and prevent dental caries due to its mineralizing and antibacterial properties. While plenty of studies have investigated the mineralizing properties, there are few papers that have examined its antibacterial effect on oral biofilm. The objective of this study was to identify the effect of silver diamine fluoride on oral biofilm. Method: The keywords used were (silver diamine fluoride OR silver diammine fluoride OR SDF OR silver fluoride OR AgF AND biofilm OR plaque). Two reviewers screened the titles and abstracts and then retrieved the full text of the potentially eligible publications. Publications of original research investigating the effect of SDF on oral biofilm were selected for this review. Results: This review included 15 laboratory studies and six clinical studies among the 540 papers identified. The laboratory studies found that SDF could prevent bacterial adhesion to the tooth surface. SDF also inhibited the growth of cariogenic bacteria, including Streptococcus mutans, Lactobacillus acidophilus, Streptococcus sobrinus, Lactobacillus rhamnosus, Actinomyces naeslundii, and Enterococcus faecalis, thus contributing to its success in caries arrest. One clinical study reported a decrease in Streptococcus mutans and Lactobacillus sp. in arrested caries after SDF treatment, and another clinical study found that SDF inhibited the growth of periodontitis microbiota, including Porphyromonas gingivalis, Tannerella forsythia, and Prevotella intermedia/nigrescens. However, three clinical studies reported no significant change in the microbial diversity of the plaque on the tooth after SDF treatment. Moreover, one laboratory study and one clinical research study reported that SDF inhibited the growth of Candida albicans. Conclusion: Not many research studies have investigated the effects of SDF on oral biofilm, although SDF has been used as a caries-arresting agent with antibacterial properties. However, a few publications have reported that SDF prevented bacterial adhesion to the teeth, inhibited the growth of cariogenic and periodontal bacteria, and possessed antifungal properties.

scholarly journals Effectiveness and safety of a new dental plaque removal device utilizing micro mist spray for removing oral biofilm in vitro

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Hiroki Hihara ◽  
Ryo Tagaino ◽  
Jumpei Washio ◽  
Kittipong Laosuwan ◽  
Dimas Prasetianto Wicaksono ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Mucous Membrane ◽  
Oral Mucosa ◽  
Dental Plaque ◽  
Tooth Surface ◽  
Oral Biofilm ◽  
Plaque Removal ◽  
Treated Area ◽  
Biofilm Removal ◽  
Significant Difference

Abstract Background Removal of oral biofilm from the oral mucosa is essential for preventing risk of respiratory and gastrointestinal infection in elderly people. Currently, no device is available which can remove oral biofilm from oral mucosa effectively and safely. Therefore, the effectiveness and safety of the Micro Scale Mist UNIT (MSM-UNIT), a newly developed dental plaque removal device utilizing high speed sprays of fine water droplets, were evaluated for biofilm removal, including the rate and surface roughness for simulated tooth surface and mucous membrane. Methods Simulated tooth and oral mucosa coated with an artificial biofilm of Streptococcus mutans were used for evaluation of effectiveness, with uncoated substrates as the controls. The MSM-UNIT and a conventional air ablation device were operated under recommended instructions. The effectiveness was evaluated from the rate of removal of the biofilm, and the safety was evaluated from the damage observed by scanning electron microscope and surface roughness. Results The biofilm removal rate of the MSM-UNIT was significantly higher than that of AIRFLOW. Little damage was observed in the area treated by the MSM-UNIT. The surface roughness of the MSM-UNIT treated area on simulated tooth surface and oral mucosa showed no significant difference to the control area. In contrast, cracks and powder were observed in the area treated by AIRFLOW. In particular, the surface roughness of the AIRFLOW treated area for Toughsilon was significantly larger than that of the control. Conclusions The MSM-UNIT could be used safely and effectively for removing biofilm not only on simulated tooth surfaces but also simulated mucous membrane. The MSM-UNIT has no harmful effect on teeth or oral mucosa, and may be used for comprehensive oral care for patients during nursing care and the perioperative period.

scholarly journals Oral biofilm challenge regulates the RANKL-OPG system in periodontal ligament and dental pulp cells

2011 ◽  
Vol 50 (1) ◽  
pp. 6-11 ◽  
Author(s):  
Georgios N. Belibasakis ◽  
Andre Meier ◽  
Bernhard Guggenheim ◽  
Nagihan Bostanci
Keyword(s):  
Dental Pulp ◽  
Periodontal Ligament ◽  
Dental Pulp Cells ◽  
Oral Biofilm ◽  
Pulp Cells

scholarly journals Zinc enhances the phototoxic effect of blue light against malodour-producing bacteria in an experimental oral biofilm

2014 ◽  
Vol 63 (8) ◽  
pp. 1071-1075 ◽  
Author(s):  
Nir Sterer ◽  
Uziel Jeffet ◽  
Aurel Dadoun ◽  
Ronit Bar-Ness Greenstein ◽  
David Kohavi
Keyword(s):  
Blue Light ◽  
Oral Biofilm

Bullet for periodontal disease in future: Chemically modified tetracyclines

2021 ◽  
pp. 1-7
Author(s):  
Shivani Sachdeva ◽  
Ameet Mani ◽  
Harish Saluja
Keyword(s):  
Chronic Periodontitis ◽  
Periodontal Ligament ◽  
Host Response ◽  
Alveolar Bone ◽  
Gastrointestinal Toxicity ◽  
Collagenolytic Activity ◽  
Periodontal Pathogens ◽  
Oral Biofilm ◽  
Chemically Modified ◽  
Chemically Modified Tetracyclines

Chronic periodontitis is nowadays popularly regarded as Dysbiosis, [1] which causes destruction of tissues rich in collagen like periodontal ligament, alveolar bone and gingival connective tissue. The oral biofilm comprises many periodontal pathogens better regarded as ‘triggers’ in causing chronic periodontitis. Since, not everyone will be affected in the same manner due to periodontal pathogens. Some might not elicit a host response while, the others might have exaggerated response. So, host modulation therapy came into existence to counteract the exaggerated host response. The chemically modified tetracyclines (CMTs) have emerged to inhibit the inflammatory response or to reduce the collagenolytic activity of host. Though a derivative of tetracyclines, it still lacks an antimicrobial action and hence, can be used for periodontitis for longer duration with no adverse effects of gastrointestinal toxicity which parent tetracyclines have.

scholarly journals Effects of statins on multispecies oral biofilm identify simvastatin as a drug candidate targetingPorphyromonas gingivalis

2018 ◽  
Vol 90 (6) ◽  
pp. 637-646 ◽  
Author(s):  
Marta Kamińska ◽  
Ardita Aliko ◽  
Annelie Hellvard ◽  
Ewa Bielecka ◽  
Veronika Binder ◽  
...  
Keyword(s):  
Drug Candidate ◽  
Oral Biofilm

scholarly journals Oxidative Stressors Modify the Response of Streptococcus mutans to Its Competence Signal Peptides

2017 ◽  
Vol 83 (22) ◽  
Author(s):  
Matthew De Furio ◽  
Sang Joon Ahn ◽  
Robert A. Burne ◽  
Stephen J. Hagen
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Dental Caries ◽  
Signaling Pathway ◽  
Streptococcus Mutans ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Oral Biofilm ◽  
Genetic Competence ◽  
Content Type

ABSTRACTThe dental caries pathogenStreptococcus mutansis continually exposed to several types of stress in the oral biofilm environment. Oxidative stress generated by reactive oxygen species has a major impact on the establishment, persistence, and virulence ofS. mutans. Here, we combined fluorescent reporter-promoter fusions with single-cell imaging to study the effects of reactive oxygen species on activation of genetic competence inS. mutans. Exposure to paraquat, which generates superoxide anion, produced a qualitatively different effect on activation of expression of the gene for the master competence regulator, ComX, than did treatment with hydrogen peroxide (H2O2), which can yield hydroxyl radical. Paraquat suppressed peptide-mediated induction ofcomXin a progressive and cumulative fashion, whereas the response to H2O2displayed a strong threshold behavior. Low concentrations of H2O2had little effect on induction ofcomXor the bacteriocin genecipB, but expression of these genes declined sharply if extracellular H2O2exceeded a threshold concentration. These effects were not due to decreased reporter gene fluorescence. Two different threshold concentrations were observed in the response to H2O2, depending on the gene promoter that was analyzed and the pathway by which the competence regulon was stimulated. The results show that paraquat and H2O2affect theS. mutanscompetence signaling pathway differently, and that some portions of the competence signaling pathway are more sensitive to oxidative stress than others.IMPORTANCEStreptococcus mutansinhabits the oral biofilm, where it plays an important role in the development of dental caries. Environmental stresses such as oxidative stress influence the growth ofS. mutansand its important virulence-associated behaviors, such as genetic competence.S. mutanscompetence development is a complex behavior that involves two different signaling peptides and can exhibit cell-to-cell heterogeneity. Although oxidative stress is known to influenceS. mutanscompetence, it is not understood how oxidative stress interacts with the peptide signaling or affects heterogeneity. In this study, we used fluorescent reporters to probe the effect of reactive oxygen species on competence signaling at the single-cell level. Our data show that different reactive oxygen species have different effects onS. mutanscompetence, and that some portions of the signaling pathway are more acutely sensitive to oxidative stress than others.

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