Histology

Sheets of abnormally crystallized enamel-longer and mor narrow than enamel tufts

Areas of abnormally crystlized enamel near the DEJ

Dentinal tubules within enamel -near DEJ

Prominent line of Retzius-indicated stress @ birth

T/F: what is the reason we acid the enamel struture of a tooth

The grooves between the imbrication lines - ridges themselves

Parallel buccal ridges near the CEJ of the upper anteriors. Usually rough

Cross striations on the enamel rods that correspond to growth rings - stain brown

Type of fluoride that only works if taken internally and only works @ the pre-eruptive stage

Direct contact fluoride;only works on erupted teeth

Caused by excessive intake of fluoride-gives teeth a mottled appearance

T/F: Systemic fluoride can help enamel that is already matured and hardened
True False

Crystalline building block of enamel

It takes____ameloblast to produce 1 enamel rod

The ratio of ameloblast to enamel rods

FYI:

Scalloped border that is seem microscopically mature enamel

On the DEJ the ___side is toward the dentin and the ___side is toward the enamel

Enamel matrix becomes heavily mineralized during this stage

What happens to the ameloblast after apposition and mineralization occurs

2 developmental disturbances that occur during the apposition stage

Begins in pits and grooves of the tooth-always larger than it appears on xray-usually not visible until it reaches the DEJ

Hardest calcified tissue of the human body

Composition of enamel

T/F: enamel is a vital tissue-it has blood supply and nerves
True False

Can enamel regenerate or repair itself

Mechanical wear on facial surface - tooth fractures from gumline...caused from hitting too hard on opposing tooth

Tooth to tooth wear on the incisal or occlusal surfaces-bruxium

Chemical damage of the enamel

2 causes of erosion

Enamel forming cell

Process of enamel formation

Enamel secreting surface of ameloblast - faces the DEJ

First stage of enamel formation

Only partially mineralized @ start
Begins formation @ insical edge or cusp tip

Is produced by living cells but is non vital itself

T/F: enamel is the only part of a tooth that can be seen clinically
True False