You can change your ad preferences anytime. Plaque as a Biofilm. Upcoming SlideShare. Like this presentation? Why not share! Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode.
Dental plaque biofilm in oral health and disease
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Mouthwash Dental Plaque: A Microbial Biofilm - PowerPoint PPT Presentation
Biofilm in stream in Yellowstone National Park. Biofilm scraped from reverse osmosis membrane.Chrome 39 offline installer
Dental plaque is biofilm. Even though you may not be familiar with the term biofilm, you have certainly encountered biofilms on a regular basis. For example, the plaque that forms on your teeth and causes tooth decay is one type of bacterial biofilm. The "gunk" that clogs your household drains is also a biofilm. If you have ever walked in a stream or river, you may have slipped on rocks that were slimy with biofilm.
A persistent infection on a scrape you got from a sports injury was likely a biofilm. And so it goes: biofilms—they're where you want to be. A biofilm is composed of living, reproducing microorganisms, such as bacteria, that exist as a colony, or community. In other words, biofilms are alive and have a complex social structure that scientists and engineers are still trying to unravel, a structure that both protects them and allows them to grow.
A biofilm forms when certain microorganisms for example, some types of bacteria adhere to the surface of some object in a moist environment and begin to reproduce. The microorganisms form an attachment to the surface of the object by secreting a slimy, glue-like substance.
Biofilms can form on just about any imaginable surface: metals, plastics, natural materials such as rocksmedical implants, kitchen counters, contact lenses, the walls of a hot tub or swimming pool did you ever notice that the sides of a hot tub or swimming pool seemed slightly slimy? Indeed, wherever the combination of moisture, nutrients, and a surface exists, biofilms will likely be found as well.
A biofilm community can be formed by a single kind of microorganism, but in nature biofilms almost always consist of mixtures of many species of bacteria, as well as fungi, algae, yeasts, protozoa, and other microorganisms, along with non-living debris and corrosion products. For example, over bacterial species have been identified in typical dental plaque biofilms!
Biofilms can be so thin as to avoid detection by the naked eye—just a few cell layers thick. The biofilms that almost certainly exist on your kitchen counter, for instance, are generally undetectable to the eye unless, like some college students, you don't wash your counters very often. They can also grow to become many inches thick; probably not on a countertop at least we hope notbut certainly as algae on rocks in a streambed.
Engineers and scientists have discovered that biofilms are held together by sugary molecular strands, collectively termed "extracellular polymeric substances" a mouthful of a term that essentially means "compounds or substances that form outside the walls of cells" or "EPS.
Free-floating, or planktonicbacteria encounter a submerged surface and within minutes can become attached. They begin to produce slimy extracellular polymeric substances EPS and to colonize the surface. EPS production allows the emerging biofilm community to develop a complex, three-dimensional structure that is influenced by a variety of environmental factors.
Biofilm communities can develop within hours. Biofilms can propagate through detachment of small or large clumps of cells, or by a type of "seeding dispersal" that releases individual cells. Either type of detachment allows bacteria to attach to a surface or to a biofilm downstream of the original community.
Now here we get to the crux of the biofilms issue. Read this little section carefully, because when you get the point here, you will understand why the study of biofilms is so radical and important, and the rest of this hypertextbook will make sense to you.2016/17 champions league group stage
You see, the effective treatment i. That's right. Harmful microorganisms were studied and still are, unfortunately, to a large extent in isolation, not as members of a biofilm colony, where they actually normally reside. Let's discuss this by way of an example.
Have you ever heard of, say, a mouthwash that is advertised to "kill millions of germs on contact? But now consider this. Those millions of germs are embedded in a plaque biofilm in your mouth. Just how does the mouthwash penetrate the biofilm to actually contact each of those millions of individual germs?
Good question. Remember that we said that biofilms can become quite thick, and that they seem to have the capacity to form defensive mechanisms against outside attacks.Toggle navigation.Zions Bank Stadium
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Description: A: Well organized community of microorganisms protected by a Plaque is a form of biofilm Caries Research ; Enamel picture from Wikipedia. Tags: biofilm caries dental microbial mouthwash plaque. Latest Highest Rated. Whether your application is business, how-to, education, medicine, school, church, sales, marketing, online training or just for fun, PowerShow. And, best of all, most of its cool features are free and easy to use. You can use PowerShow.
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We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime. Dental Plaque. Upcoming SlideShare. Like this presentation? Why not share! Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Full Name Comment goes here. Are you sure you want to Yes No. Ujjwal Kumar Gupta. Show More. No Downloads.
Views Total views. Actions Shares. No notes for slide. Dental Plaque 1.Dental plaque is an archetypical biofilm composed of a complex microbial community. It is the aetiological agent for major dental diseases such as dental caries and periodontal disease. The clinical picture of these dental diseases is a net result of the cross-talk between the pathogenic dental plaque biofilm and the host tissue response.
In the healthy state, both plaque biofilm and adjacent tissues maintain a delicate balance, establishing a harmonious relationship between the two. However, changes occur during the disease process that transform this 'healthy' dental plaque into a 'pathogenic' biofilm. Recent advances in molecular microbiology have improved the understanding of dental plaque biofilm and produced numerous clinical benefits. Therefore, it is imperative that clinicians keep abreast with these new developments in the field of dentistry.
Better understanding of the molecular mechanisms behind dental diseases will facilitate the development of novel therapeutic strategies to establish a 'healthy dental plaque biofilm' by modulating both host and microbial factors.
In this review, the present authors aim to summarise the current knowledge on dental plaque as a microbial biofilm and its properties in oral health and disease. Abstract Dental plaque is an archetypical biofilm composed of a complex microbial community. Publication types Research Support, Non-U. Gov't Review.See further information regarding how to choose a College. This is one of the most frequently asked questions about applying to Cambridge.
On average across all subjects, we typically receive five applications per place, but naturally there is some variation between courses. The University and Colleges are committed to offering admission to students of the highest academic ability and potential. Despite application numbers varying considerably each year, our system means that success rates are very similar from College to College.
This is because the pool results in many students (938 in the case of the 2017 cycle, about 21 per cent of all offers made) receiving an offer from a College other than the one they applied to, or were allocated to through the open application system. NB: 'admissions cycle' refers to the UCAS Apply cycle in which applications are considered, eg '2017 cycle' refers to applications made from September 2016 onwards for admission to courses starting in October 2017 or by deferred entry for courses starting in 2018.
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What happens at the audition. Organ scholarshipsOrgan scholarships overview Which Colleges have Organ Scholars.Couldn't fit in previous comment field the aspect of financing. Banks review borrowing base twice a year, and cut back last fall based on lower prices.
By the time they re-evaluate in spring with higher bases and presumably more ability to spend on capex, the 1st round of OPEC cuts will already be in the books.Emergency immune plus zinc
It will take a bit longer than assumed, and thus higher oil prices. James kaiser on December 23 2016 said: I agree with Craig and Phil. The big thing Oil Shale requires is CAPEX. You have to spend big money to make big money.
They either have to make the money or borrow it. They can't produce enough to drill, and banks aren't going to lend them money OR they're already extended their credit to the limit. Also, companies are inherently conservative. The industry might be short sited at times, but it's still runs to make a profit, and until there's enough revenue and cash flow coming back OUT of oil shales, banks and company executives will hesitate to or won't be able to spend like it's 2014.
As in the past the abusers will go all the way. Alex on December 29 2016 said: I would not rely too much on rig count considering new technology of horizontal drilling. Plus, there are a lot of wells that have been drilled, and now require frac jobs with lower than drilling costs.FORMATION OF DENTAL PLAQUE ( Dental Plaque Part 2 )
Nothing contained on the Web site shall be considered a recommendation, solicitation, or offer to buy or sell a security to any person in any jurisdiction. Fall To 15-year Lows 22 hours Mexico Blames Brazil For Failing Auction 1 day Norway Allows Eni To Restart Goliat Oil Field In Barents Sea 1 day Malaysia Suggests Muslim Countries Stop Trading Oil In U.
Fall To 15-year Lows Find us on: Oil Imports From Mexico Soar After Hurricane Season U. By Tsvetana Paraskova for Oilprice. Next Post Oilfield Services To See Spending Surge In 2017 Tsvetana Paraskova Tsvetana is a writer for the U. Merchant of Record: A Media Solutions trading as Oilprice. Yesterday, insurers, small businesses and charity groups called on the Government to scrap the increase. The rise was first announced in the Autumn Statement speech in November. IPT is applied to insurers by the Government but historically it has been passed onto consumers, in the form of higher premiums.
Simon McCulloch, director of comparethemarket. An open letter signed, among others, by the Association of British Insurers, the AA and Federation of Small Business yesterday urged the Government to scrap the planed two per cent hike. It comes as insurers have slammed another move by the Government to change the discount rate used to calculate how much compensation is paid in severe personal injury claims.
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