Dental Caries
Pathology of dental caries
Macroscopic appearance
White chalky spot Then becomes Brown spot
Microscopic appearance
Histopathology of ENAMEL caries
Phase of initiation
Phase of bacterial invasion
Phase of destruction
Phase of secondary enamel caries
Histopathology of DENTIN caries
Uninfected lesion
Zone of fatty degeneration
Zone of hypermineralization
Zone of hypomineralization
Infected lesion
Bioneers
Beading
Liquefaction foci and transverse clefts
Superficial zone
Definition
Localized microbial disease affecting post eruptive tooth by demineralizing its inorganic content and destruction of its organic content.
Dental plaque formation
Initial community
Intermediate community
Mature community
Types Of Caries
According to site
1;pits and fissure caries 2;smooth surface caries 3; root caries
According to stage
1;spot 2;enamel caries 3; dentin caries 4; deep dentin caries
According to extent
1;primary caries 2; secomdary caries
According to progression rate
1; rumpant caries 2;acute caries 3; chronic caries 4;arrested caries
Etiology
1)Host factors
Susceptible tooth
Position
Morphology
Structure
Fluorides
Genetic factors
saliva
Washing effect
Salivary glycoproteins
Buffering capacity
Antibacterial effect
2)Substrate
Type of CHO
Amount of CHO
Frequency of CHO
Texture of CHO
Local effect of CHO
Refinement of CHO
3)Cariogenic bacteria
Acidogenic
Acidouric
Form intra&extracellular polysaccharides
Adhesiveness
4)Time