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1- Mass related properties: Density and specific gravity
2- Thermal properties: * Heat of fusion * thermal conductivity * coefficient of thermal expansion and contraction * melting and freezing temperature * specific heat * thermal diffusivity
3- Optical properties: * reflection * refraction * scattering * transmission* luminescence
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoColour
Pure enamel is greyish or bluish-white.
Enamel on tooth appears yellowish white as it semi-translucent and reflects colour of underlying dentine
Thickness
0 to 2 mm (incisors)/ 2.6 mm (molars)
Permeability
Selectively permeable
Water travels thro' enamel @ 4mm3/ cm2/24 hrs through interstices, pores, enamel lamellae & tufts
Decreases with ageing
Solubility
Soluble in acids; Presence of Fluoride reduces solubility and presence of carbonate increases solubility.
Birefringence
Enamel is birefringent.
Hardness
KHN 350 to 500
Moh Scale 5 to 8
Modulus of Elasticty
19x106 psi/ 130 GPa
Refractive index
1.655 (in comparison Porcelain is 1.5 and Quartz is 1.54)
Strength
Compressive strength 50x103 psi/ 350 MPa
Shear strength 13x103 psi/ 90 MPa
Tensile strength 1.5x103 psi/ 10 MPa
Specific gravity
Enamel of Deciduous teeth 2.95
Enamel of Permanent teeth 2.97
Wiki User
∙ 13y agoer.. it is solid.
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Physical properties of coal and snow?
physical properties of coal and snow
Do all objects have physical properties?
All material objects have physical properties.
What is the difference between chemical and physical properties?
Physical properties use your senses and chemical properties are when you mix two chemicals together.
Physical properties of boron?
some physical properties of Boron are: its color is black, it is a solid and it is rough shape
Are melting and boiling point physical properties of a substance?
Melting and boiling points are physical properties of materials.
What do you call the white covering of the tooth?
It is called the enamel. It's the most external layer of a tooth and the hardest substance in the body.
What is the human tooth enamel called?
Enamel is called the dentine part of the tooth
Is tooth enamel and paint enamel the same?
yes
What is the outer of a tooth called?
Tooth enamel.
The outside of your tooth is called enamel?
it is called enamel. so the answer is true It is called enamel
What element is needed for strong enamel?
Tooth enamel, calcium. Nail enamel, Biotin.
Why do we get a hole in your tooth?
Eroding away of tooth enamel
What is used to react with tooth enamel to reduce enamel solubility?
fluoride
Cells that produce this substance degenerate after tooth eruption?
enamel
What is the outer layer of your teeth called?
dentine. Im 90% sure its called enamel actually.... the outer layer is actually enamel if dentine was what the outer layer of our teeth were made of, many persons will get fake teeth. dentine is the material found under the enamel.
How do bacteria break down tooth enamel?
Tooth enamel is broken down when bacteria feed off the sugars on your teeth. Their waste is the acid that breaks down your enamel.
What is below the enamel of a tooth?
It's Dentin
