plaque 3 inter bacterial substances Flashcards
what are the inter-bacterial substances of plaque biofilm? (8)
Proteins
Carbohydrates
Dietary additives (sugar)
Desquamated epithelial cells
Leukocytes
Bacterial products such as -
Enzymes
Endotoxins
Acids
what is a protein?
bulk of interbacterial substances made up of glycoproteins.
(protein with a sugar attached) from saliva/crevicular fluid (immunity)
what do glycoproteins do?
involved in nearly every cell process for cell interaction.
what is an extracellular polysaccharide?
a carbohydrate composed of sugar.
what are the 3 extracellular polysaccharides?
Dextrans
Levans
Fructans
Extracellular polysaccharides are - sticky to?
increase the bulk of the plaque, encourage other bacteria to adhere to plaque
dietary additives in plaque biofilm?
No actual food particles in plaq
Dissolved substances only - sugar
Significant in relation to caries
what are the 3 cells present in plaque?
erythrocytes
leukocytes
desquamated epithelial cells
Bacterial products Gram – ve & + VE Bacteria in plaque?
Endotoxins
Endotoxins from Gram -ve bacteria
Gram +ve bacteria what does it release?
mucopeptides
Collagenase what does it do?
destroys collagen tissue
Hyaluronidase what does it do?
causesulceration of epithelium breaks down hylaronic acid
Beta ( ) glucuronidase what does it destroy
destroys ground substance in vitro
Chondroitin sulphatase what does it destroy
destroys ground substance in vitro
Neuraminidase what does it increase
bulk of plaque
how is acid formed?
by action of bacteria
what does an antigen trigger?
triggers the immune response, stimulates production of antibodies
