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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Discuss bacterial factors that allow oral microorganisms to colonize and cause disease in the oral cavity
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Factors Influencing Biofilm Accumulation
(1) Crowded Teeth-harder to clean (2) Rough Surfaces-attaches easier (3) Out of Occlusion-biofilm covers tooth w/o partner (4) Xerostomia- less saliva, bacteria multiplies |
Wilkins Ch 17, p.300
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What are the human defensive factors that ward off these infections.
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Defensive Factors
Leukocytes attempt to fight off the pathogenic bacteria???? |
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Name and three (3) non-mineralized deposits.
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Soft Deposits (aka "Acquired Pellicle")
(1) Biofilm (2) Materia Alba (3) Food Debris |
Wilkins Ch 17, 293
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Describe Biofilm
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Biofilm
Origin: Colonization of oral microorganisms (1) Dense, gel-like (2) Adheres to FIRMLY on acquired pellicle (3) and thus on teeth, calculus, other surfaces |
Wilkins Ch 17, p.295
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Describe Materia Alba
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Materia Alba
Origin: Incidental Accumulation (1) white / grayish-white mass (cottage cheese) of oral debris, bacteria (2) Lies over BIOFILM (3) LOOSLEY adherent (removed w/water) |
Wilkins Ch 17, p.303 Table 17.1
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Describe Food Debris
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Food Debris
Origin: Food retention following eating (1) LOOSELY attached particulate matter (2) Removed by self-cleaning activity of Tongue & saliva, rinsing |
Wilkins Ch 17, p.303 Table 17.1
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List in order the three (3) main steps in biofilm formation.
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Formation of Biofilm
(1) Pellicle Formation-salivary glycoproteins are absorbed on dental enamel (2) bacterial colonization-Microorganisms SELECTIVELY colonize the pellicle (3) biofilm maturation-Biofilm grows |
Wilkins Ch 17, p 295; Table 17.2
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Describe the composition of biofilm over time.
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Changes of Biofilm (Over Time)
Cleaned Mouth: Few Cocci Not Cleaned for: 1-2 days = Masses of cocci & short rods (Gram+) 4-7 day = Filamentous bacteria, Leukocyte, Fusobacteria 7-14 days = Spriochetes, Vibrios (Gram-) 14-21 days = acute Gingivitis |
Wilkins Ch 17, p 297; Table 17.3
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What is the composition of Biofilm?
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Composition of Biofilm
Inorganic Elements (1) Calcium (2) Phosphorus Organic Components: (3) Carbohydrates-Provides sugars for bacteria (4) Proteins- |
Wilkins Ch 17, p.299
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Describe the biofilm matrix and what purpose it serves.
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Microorganisms in Biofilm
(1) Mutans Streptococcus-acidogenic bacteria INITIATES demineralization of teeth (2) Lactobacilli-helps the progression of decay |
Wilkins Ch 17, p.301
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Explain how bacteria can overcome the host defense capacity
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Periodontal Infection
Bacteria and the toxic products they produce have access to the circulation, and carry their disease material to the major systems throughout the body |
Wilkins Ch 17, p302
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Explain why everyone doesn’t get caries and/or periodontal disease if they have biofilm.
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The pH of Biofilm
Not everyone gets caries/perio w/biofilm due to Genetic factors (1) Caries susceptible pts-have lower pH levels |
Wilkins Ch 17, p.301
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At what pH levels does demineralization begin?
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Demineralization
(1) Enamel = pH 4.5-5.6 (2) Root = pH 6.0-6.7 |
Wilkins Ch 17, p.301
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State where biofilm formation begins.
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Formation of Biofilm
(1) Begins at the GINGIVAL MARGIN (2) particularly on PROXIMAL surfaces (3) Spreads over GINGIVAL THIRD and upward |
Wilkins Ch 17, p.300
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Explain three mechanisms for bacterial adhesion and biofilm development.
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Adhesion: ???
(1)Bacteria adheres to rough surfaces (2) Attaches to sticky sugary materials |
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Compare and contrast supra- and sub-gingival biofilm characteristics.
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Supragingival Biofilm:
(1) Aerobic bacteria (Gram +) (2) Feeds on: saliva, ingested food Subgingival Biofilm: (1) Anaerobic bacteria (Gram -); Motile (2) Feeds on: Exudate, Leukocytes (3) Down growth from Supragingival Biofilm |
Wilkins, Ch 17 p.297-299; Table 17.2
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Discuss the clinical significance of biofilm.
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Significance of Dental Biofilm
Plays a major role in the initiation of: (1) Dental caries (2) Periodontal Diseases Contributes to: (1) Calculus (mineralized biofilm) (2) Halitosis |
Wilkins Ch 17, p.301
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Name three (3) methods to assess the presence and quality of oral biofilm.
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Detection of Biofilm
(1) Direct Vision (2) Use of Explorer / Probe -feeling for calcification (3) Use of Disclosing Agent |
Wilkins Ch 17, p.300
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Every patient should be given information and taught the skills for self-care.
List seven (7) treatment modalities for biofilm control and give examples of each. |
Factors to Teach the Patient
(1) Show location, composition & prop. Of biofilm (2) Explain Biofilm's role in caries & perio disease (3) Explain cause & prev. of dental caries (4) Effects of personal oral care in prev. of biofilm (5) Explain special adaptations for special needs (6) Point out cariogenic foods in diet (7) Explain relationship of freq. of eating cariogenic foods |
Wilkins Ch 17, p.304
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