Oral biology
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Created by:
sunflowerIME on December 10, 2010
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23 terms
Terms | Definitions |
|---|---|
 Dental plaque | an accumulation of bacterial on the surface of hte teeth or other solid oral structures that is not readily removed by rinsing |
| Supragingival plaque | deposit on the crown/ As accumulation continues, it appears as a white-yellow globular mass |
| Subgingival plaque | in the gingival sulcus or periodontal pocket/ cannot be seen unless removed with an instrument |
| Bacteria | dental plaque consists primarily of bacteria |
| Cocci | Sphericcal-most common form in plaque |
| Rod | rectangular/ straight and curve |
| Spirochetes | spiral |
| Gram-positive | purple/ Capsule-Peptidoglycan/Cytoplasmic membrane/ Bacterial cytoplasm |
| Gram-negative | red/ Capsule-Otter membrane/ Peptidoglycan/Cytoblasmic membarne/ Bacterial cytoplasm |
| Fimbrae (fili) | small proteinaceous projections attached to the external surface of both gram-negative and gram positive organism/ hydroxyapatite and coaggregation between species of bacteria |
| Flagella | long fine, wavy filamentous structures, used for mobility, longer than frimbrae, larger diameter then fimbrae, single or multiple flagella |
| Aerobes | bacteria that require oxygen for growth |
| Facultative anaerobes | use oxygen when it is present/ use anaerobic fermentation when oxygen is absent |
| Obligate anaerobes | cannot survive in aerobic environment |
| Capnophiles | require or refer CO2 for growth |
| Fermentative (SACCAROLYTIC) | obtain energy from break down of complex organic compounds |
| Non-fermentative (asaccarolytic) | use amino acid, peptide, and protein for growth |
| Supragingival (supramarginal) plaque | thin layer, 1-20 cells thick/ Mostly gram positive, facultative, anaerobic organism |
| Pellicle | tenaceous membranous film that form on the surface of the teeth or restoration, calculus and other solid surface/ Bacterial are not require for its formation/ Bacteria adhere to it shortly after it formed/ Not all bacteria in saliva can attach to pellicle |
| Acidogenic | ability to produce acid/ Fermentative or saccharolytic-ability to metabolize fermentable carbonhydrate to produce organic acids |
| Aciduric | ability to survive in acid environment |
| Lactobacilli | prolific producer of lactic acid/ associated with progression of caries/ associated with pit-fissure caries |
| Actinomyces | associated with root surface caries, deep dentinal caries |
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