cariogenic bacteria causes caries

3 composition of teeth

Dental caries affect only 3

no dental caries in

Inflammation of pulp

Pulpitis not treated

Anatomical crown Hardest Very brittle

Provides outermost hard covering of crown allowing efficient mastication resist wear

Enamel thickest on

Enamel formed by the cells

Originate from embryonic germ layer

Epithelial product derived from

Connective tissue

Differentiate into ametoblast

Must occur first

Formative cells of enamel

Ameloblast derived from

Dental lamina is from

Enamel is product of

dentin cementum pdl alveolar bone derived from

Molecule allowed by enamel

Absorption of ____ related to enamel's permeability

Enamel not completely mineralized

2-3 3 years for enamel to mineralized

Thickness of enamel

Thinnest enamel

Inorganic hydroxyapatite crystals

Organic amelogenin enamel

Water of enamel

Enamel rod diameter of head

Enamel rod covered by a sheath of protein

in between enamel rods

Fish scale appearance

Paddle shape

Key hole appearance

Perpendicular at 90 degrees to the DEJ

Vertical oriented under cusp tip

Cervical region enamel rods apically oriented

Cervical region enamel rods occlusally or horizontally oriented

Dark bands of HSB

Light bands of HSB

Towards dentin

Towards enamel

Implicated in the initiation of dental caries favor the start of dental caries

Entry points for bacteria and cariogenic foods

Grass like Narrow ribbon like hypomineralized fault

Leaf like and long

It will not reach the surface

favor lateral spread of dental caries to DEJ

Shock absorber I force

Club like

Not a fault / hypocalcified structure Part of a cell - odontoblast

Odontoblastic process location

Odontoblast body location

Some odontoblastic process reach

protoplasmic extension of odontoblastic process that has gone beyond DEJ and reached enamel

Enamel spindle

Formation of enamel happens in the

molar, first enamel will form in

4 lobes represented by

Last lobe / 4th lobe are in

Coalasce of cusps form the

Depressions

Uncoalesced grooves or imperfect union are called

Meeting point of fissures

External manifestation of lines of retzius

Elevation between the grooves

during birth, exagerrated line of retzius

doesnt have enamel rods

hypomineralized rods that resembles grass or ribbon, arising from the DEJ and extend to enamel