There is a vast literature in periodontal microbiology based on these species. (Gram-negative bacteria,short, pleomorphic rods) Fusobacterium sp. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Anaerobic Gram-negative bacteria – Gram stain. The human oral microbiome. Microbial Etiology of Periodontal Disease, Dr. Lee 2 Dental plaque biofilm infection Ecological point of view Ecological community evolved for survival as a whole Complex community of more than 400 bacterial species Dynamic equilibrium between bacteria and a host defense Adopted survival strategies favoring growth in plaque “Selection” of “pathogenic” bacteria among microbial community Pathogenesis of paque associated periodontal diseases 8. Some studies attempted to determine whether specific microorganisms were found in lesion sites as compared to healthy sites. 35. See our Privacy Policy and User Agreement for details. On this basis, a test to measure protease activity by degradation of the substrate N-benzoyl-dl-arginine-2-naphthylamide has been … The search for the etiologic agents of periodontal diseases has been in progress for over a century. Oral mucosal and salivary gland infections . Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. It is found in the oral cavity, where it is implicated in periodontal disease, as well as in the upper gastrointestinal tract, the respiratory tract and the colon.It has been isolated from women with bacterial vaginosis. Pathology of periodontal disease A. Hasan1 and R. M. Palmer*2 rinsed away. See our User Agreement and Privacy Policy. Corn Cob Formation (Listgarten et al, 1973)– Central Gram Negative Filamentous Core Supports Outer Coccal Cells Which Are Firmly Attached By Inter-bacterial Adherence Or Coaggregation. Dr. Fletcher is currently the Assistant Dean for Graduate Student Affairs in the School of Medicine at Loma Linda University. The important role of spirochetes and fusiforms in Vincent’s infection was widely recognized in the succeeding 2 decades. 31. However, bacteria can adhere to host cells and form a commensal relationship, beneficial for both parties. Materia alba refers to soft accumulations of bacteria, food matter, and tissue cells that lack the organizedstructure of dental plaque and are easily displaced with a water spray. It may form on teeth, mucosa or other solid surfaces. Dewhirst FE, Chen T, Izara J, Paster BJ, Tanner AC, Yu WH, et al. If you continue browsing the site, you agree to the use of cookies on this website. Periodontal pathogens such as P. gingivalis, Tannerella forsythia, and Treponema denticola are asaccharolytic and strongly proteolytic. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Looks like you’ve clipped this slide to already. If you continue browsing the site, you agree to the use of cookies on this website. Subgingival microflora and periodontal disease J Clin Periodontol. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Role of iatrogenic and other local factors 10. The red complex, which includes Porphyromonas gingivalis , Treponema denticola , and Tannerella forsythia (formerly Bacteroides forsythus ), are recognized as the most important pathogens in adult periodontal disease. The ability to adhere to surfaces is a general property of almost all bacteria. You can change your ad preferences anytime. 37. Microbiology of periodontal disease . Periodontal Microbiology 2. 36. Principles of infection control . Wiley would like to announce that starting January 2021, Prof. Hansel M. Fletcher will be the Editor-in-Chief of Molecular Oral Microbiology. Periodontal Instruments & Instrumentation, Classification des cellulites selon la topographie, Le manuel du généraliste 2 du symptôme au diagnostic, No public clipboards found for this slide. ( Gram -negative bacteria, thin, long, usually sharp-ended rods) 33 Microbiology of dental caries . Bacteroides sp. Microbiology aspect in endodontics.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. 1880–1920), when the etiologic agents of many medically important infections were determined. Periodontium is composed of the gingiva, periodontal ligament, cementum, and alveolar bone.. Periodontitis is active inflammation of the periodontium.. Diastema is a space between teeth within the same arcade.. The understanding of regulation of inflammation in periodontitis is far from complete; however, as the understanding of periodontal inflammation increases, the current understanding of the microbiology of periodontitis becomes less clear. Estimated that about 500 different species are capable of colonizing the mouth and any individual may typically harbor 150 or more different species In response to this perception I was asked to discuss recent literature in this field at the 1986 Annual Meeting of the American Association of Dental Research. The search started in the “golden age of microbiology” (approx. A, Streptococcus mitis are gram-positive, fast-growing, facultatively anaerobic bacteria that are easy to culture on a blood-agar plate. See our Privacy Policy and User Agreement for details. A “battle” occurs between the parasite and the host resulting in increasingly obvious clinical signs and symptoms. The search started in the “golden age of microbiology” (approx. Microbiology of Periodontal diseases Presented by Dr.Aishwarya Hajare 2nd year postgraduate student 2 3. Basic concepts of immunity and inflammation 6. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Part 6: Cross-infection and control . Clipping is a handy way to collect important slides you want to go back to later. Later investigators failed to reproduce their results either with the above combination of microorganisms or with many other combinations they tested. Nicholas S. Jakubovics, ... Alexander H. Rickard, in Advances in Applied Microbiology, 2014. MicroBioLogy of Periodontal Diseases - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. It sure looks like the periodontal microbiology is in for an exciting time! Periodontal microbiology 1. Dental calculus 9. Microbiology of. A Review. During the late 1950s, a group of clinicians, sometimes referred to as “plaque evangelists”, heavily emphasized the need for plaque control in the prevention and treatment of periodontal diseases.Thus, once again bacteria were thought to play a role in the etiology of destructive periodontal disease, but as non-specific causative agents. The pursuit of timely, cost-effective, accurate, and noninvasive diagnostic methodologies is an endeavor of urgency among clinicians and scientists alike. Socransky SS, Haffajee AD, Cugini MA, Smith C, Kent RL Jr. Microbial complexes in subgingival plaque. It is estimated that 90% of world population suffers from the disease (Pihlstrom et al., 2005). Periodontal disease; ; Delivery Systems. 4. Start studying Perio Microbiology Powerpoint 2. Normal oral flora, the oral ecosystem and plaque biofilms . Biofilms are the preferred method of growth for many, perhaps most species of bacteria. Many investigators claimed success in controlling advanced destructive periodontal disease by combining local and systemic therapy. The agent establishes within tissues or on mucous membranes or skin. 1979 Oct;6(5):351-82. doi: 10.1111/j.1600-051x.1979.tb01935.x. APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... No public clipboards found for this slide. Periodontal diseases are infections that are caused by microorganisms that colonize the tooth surface at or below the gingival margin. Microbiology of Periodontal Diseases. Periodontics MCQs - Periodontal Microbiology # Of the following four bacterial species, which is least likely to be found in plaque ? Periodontal microbiology 5. Microbiology (sub- and supragingival), periodontal probing depth (PPD), bleeding on probing (BOP), and gingival crevicular fluid (GCF) flow were assessed at baseline (T1), at bracket removal (T2), and 3 months post-treatment (T3). A clear halo surrounding the colonies appears through hemolytic activity. Porphyromonas gingivalis belongs to the phylum Bacteroidetes and is a nonmotile, Gram-negative, rod-shaped, anaerobic, pathogenic bacterium.It forms black colonies on blood agar.. Others studies sought differences in the microorganisms in subgingival plaque samples taken from subjects with clinically different forms of periodontal disease or periodontal health. Detecting pathologies at their earliest stages can significantly affect patient discomfort, prognosis, therapeutic intervention, survival rates, and recurrence. Figure 8-1 Various periodontal and cariogenic species grown on agar plates. Human fetus is sterile but after passing through birth canal it acquires vaginal and fecal microorganisms By 2nd day Anaerobic flora can be detected in infant edentulous mouth Dr Saif Khan 209/10/13 3. This host–pathogen interaction often is resolved within a short period of time, usually, but not always, in favour of the host. In the equine dentition, this would be abnormal except for the spaces between the third incisor and canine and the canine and first premolar (or second premolar). Procedures such as dental scaling can radically alter the composition of the periodontal pocket flora of diseased sites and shift the balance in favour of colonization of such sites by flora that are associated with health. Within a short period of time, signs or symptoms of a disease appear at the site of introduction or elsewhere in the individual. Christina Popova a, V elitchka Dosseva-Panova a & Vladimir P anov b. a Medical University of Sofia, Faculty of Dental Medicine, Sofia, Bulgaria. Start studying Chapter 5 Oral Microbiology and Plaque-associated Diseases. Periodontal infections and another biofilm-induced disease, dental caries, are arguably the most common infectious diseases affecting the human. They gradually destroy the support of your natural teeth. The proposal of the “ecological plaque hypothesis” in 2003 was a significant development in the conceptual understanding of the subgingival environment and how the local environment can influence bacterial composition. Individual Micro colonies can consist of single species but are frequently composed of several different species. There is a perception of conflicting data and opinions among research laboratories that are studying periodontal microbiology. Diabetes mellitus ppt p. gingivalis: Hygienist salary chlorhexidine rinse: hydrogen peroxide mouthwash antioxidants ppt: Metronidazole dosage implant center greenville: Peptostreptococcus micros erectile dysfunction: Microbiology decay aetiology progression: amoxicillin dosage porphyromonas gingivalis: Chlorhexidine rinse myocardial infarction B, Veillonella parvula are anaerobic gram-negative small cocci. periodontal diseases DR PO AYANBADEJO Faculty of Dental Sciences CMUL. Which of the following bacteria is the most important in causing periodontal disease? In essence, this is a natural cleansing mechanism. Subgingival microflora and periodontal disease. INTRODUCTION characterized by inflammation and degeneration of the teeth Periodontal disease is one of the major dental illnesses that affect millions of people around the globe. 33. In certain ways, periodontal diseases may be among the most unusual infections of the human.In contrast to the outer surface of most parts of the body, the outer layers of the tooth do not “shed” and thus microbial colonization (accumulation) is facilitated. 32. Microbial interactionswith the host in periodontal diseases 7. The search for the etiologic agents of periodontal diseases has been in progress for over a century. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Clipping is a handy way to collect important slides you want to go back to later. 4.7.4 Proteases and DNases. LVH and WEC Moore [14] . Although periodontal diseases have certain features in common with other infectious diseases, there are several features of these diseases that are quite different. From an ecologic viewpoint, the oral cavity, which communicates with the pharynx, should be considered as an “open growth system” with an uninterrupted ingestion and removal of microorganisms and their nutrients. 1880–1920), when the etiologic agents of many medically important infections were determined. While we think we know that bacteria initiate the disease, the role of specific bacteria is still unknown. The high turnover rate of the intraoral epithelial cells, especially of the gingiva, prevents the permanent accumulation of large masses of microorganisms on these surfaces. Oral microbiology ppt دخول. These deposits can be readily visualised with vegetable or synthetic dyes in disclosing solutions, and can become calcified to form calculus. Microbiology of periodontal disease- part 2, Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). MICROBIOLOGY OF PERIODONTAL DISEASE ... Plaque control Root surface debridement Periodontal surgery Prudent use of antimicrobial agents Page ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 45b7e3-YTQ1N They did demonstrate, however, that mixed infections were due to bacteria (rather than a virus).In other words, any combination of microorganisms capable of producing an array of destructive metabolites could lead to transmissible infections in animals and, by extension, to destructive periodontal infections in humans. Periodontal Medicine: Past & Present Dr. Shankargouda Patil1*, Dr. Roopa S Rao2, Dr. A. Thirumal Raj3 *Corresponding Author Email: sbpatil1612@gmail.com Contributors: 1.Associate Professor Department of Oral Pathology and Microbiology Faculty of Dental Sciences, MS Ramaiah University of While certain infections follow this pattern, more commonly, colonization by a pathogenic species does not lead to overt disease, at least immediately. One of the most important mechanisms is shedding. 2. Genetic factors associated with periodontal diseases 11. J Bacteriol 2010;192:5002-17. Lancefield groups : A to V without I and T. In acute infections, an agent is acquired by exposure to an individual harbouring that agent or from the environment. If you continue browsing the site, you agree to the use of cookies on this website. This means that this microbiota lives in harmony with its host, but under specific conditions (increased mass and/or pathogenicity, suppression of commensal or beneficial bacteria and/or reduced host response), disease can occur. Thus, daily experience suggests that colonization by a pathogen is rapidly followed by expression of disease. ... PPT Chapter 13 Asthma 35 Terms. These bacteria are usually found together in periodontal pockets, suggesting that they may cause destruction of the periodontal tissue in a cooperative manner. Oral microbiology – Bacteriology of dental caries and periodontal diseases. 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