week three Flashcards
(23 cards)
what is acquired plaque?
a coating of saliva that forms on any exposed tooth surface
what are the benefits of pellicle?
keeps surface moist and prevents them from drying, provides a protective barrier from acid
what are the disadvantages of pellicle?
- it provides nutrients
- carbohydrates that provide binding sites
- proline rich proteins are broken down by bacteria and enhance their growth
where does the bacteria in our mouth come from?
atmosphere, food, human contact, animals
how long does plaque initial take to form?
2 hours
when does plaque stop replicating?
after 21 days
what are the organic components of plaque?
carbohydrates, proteins, lipids, epithelial cells, leukocytes, macrophages
what are the inorganic components?
calcium, phosphorus, fluoride
what is materia alba?
debris made up of food plaque, epithelial cells, leukocytes and it is washed away easily with water
what are mechanisms of bacterial attachment?
cell surface proteins, adhesins, fimbriae, sticky glucans
what are primary colonizers?
have the ability to stick directly to the acquired pellicle, usually gram positive
what are secondary colonizers?
bacteria that arrives later because they cannot act as primary colonizers, gram negative
stages of biofilm
attachment, cell to cell adhesion, proliferation, maturation
what does plaque use for metabolism?
sucrose
supragingival plaques
- nutrients derived from saliva
- coronal to gingival margin
- bacteria require higher o2 levels
- contributes to subgingival plaque
subgingival plaque
- nutrients derived from gingival crevicular fluid and inflammatory secretions
- will adhere to sulcus, root surfaces, and epithelial lining
- progression of supra gingival plaque
what are the types of plaque?
unattached, attached, epithelial attached
unattached plaque
between the layers of attached plaque, gram -
attached plaque
over the acquired pellicle densely packed
epithelial attached plaque
loosely attached to the pocket lining, gram -
what are the strategies to control biofilm?
- control of nutrients
- control of biofilm ph
- control of redox potential
what is calculus?
mineralized bacterial plaque
what does fructan do?
anchor bacteria to cell wall and stabilize plaque mass and act as an energy source for other bacteria
