DEN: Ch 12&13 Enamel, Dentin, & Pulp
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21 Terms
What is the hardest mineralized tissue in the human body?
Enamel
What material is mature enamel made of?
Crystalline material
Is enamel vascular or avascular?
Avascular
What does avascular mean
No nerve supply
Does enamel have never supply within it
No
Is enamel a renewable tissue?
No, it is not renewable
What are the properties of enamel?
96% Inorganic, 1% Organic, 3% Water
What chemical does the crystalline formation of enamel mostly contain?
Calcium hydroxyapatite
How does enamel appear on a radiograph?
Radiopaque
Is enamel more radiopaque or more radiolucent than dentin and pulp?
More radiopaque
What is the anatomic crown?
The entire enamel-covered portion of the tooth
What is the clinical crown?
Only the part of the tooth visible in the mouth
TRUE OR FALSE: In a patient with a history of chronic periodontitis and gingival recession, the clinical crown most likely does not reveal the root surface
FALSE
Where is enamel thinner?
In the cervical region
What is the cervical region?
Where the crown meets the root (near the gumline)
Where is enamel thicker?
In masticatory surfaces
What are examples of thick enamel
Incisal ridge and cusps where impact can be greater
TRUE OR FALSE: everyone can achieve the same shade of enamel
FLASE
What causes primary/deciduous teeth to be brighter than permanent teeth?
Hydroxyapatite (the crystalline formation of calcium phosphate) is tightly packed in primary teeth
What is Attrition?
The wear of teeth from habits such as bruxism (grinding) which can remove larger amounts of tooth material
What are some beginning signs of Attrition
Wear facets which look like "tide pools”
