- What are your teeth made of??
The hardest substance in the human body is one of the four kinds of tissue that make up your teeth. It is Enamel, and it's covers the crown of the tooth ,the part you see above the gum ,or gingiva. (Enamel is so tough that a dentist drill has to whir at half a million revolutions a minute in order to cut through it.)
A bony material called cementum covers the root, which fits into a socket in the jaw and is joined to it by a membrane.
Dentine , a material similar to bone is found under the enamel and the cementum and it forms the largest part of the tooth. Pulp, the living heart or centre of every tooth is the last of four substances . It contains nerves, connective tissue, blood vessels and lymphatics .When you have a tooth ache this is where it's hurts.
2.Why are baby teeth important??
The idea that baby teeth don't matter because they fall out anyway is a misconception.
To neglect the baby teeth is to invite a lifetime of dental problems. As the child matures the primary teeth guide the growth of the jawbones and the second is the permanent set of teeth.
If the primary teeth are lost prematurely the jaw may not develop correctly, and the new teeth may come in crooked or crowded.
3.Why are straight teeth and good bite important to health
Occlusion is a favourite word among dentists.
It refers to the physical relationship of the upper and lower teeth when the mouth is closed. If your bite is right, the points and facets of the upper and lower jaw mesh just right so that your molars are able to grind up even small bits of food .
Malocclusion means faulty bite ; the teeth don't fit together as they should they may be too widely spaced, because some of them are missing or they may be crowded together; with some teeth twisted or overlapping.
Crowded teeth are difficult to clean and as a result collect debris that causes tooth decay and gum disease.
A defective bite creates pressure and stress that can loosen teeth and lead to imperfect speech, muscle strain , chewing difficulties as well as disorders of digestion .
4. Why do teeth become discoloured??
Sime stains on teeth are caused by smoking or drinking tea /coffee and can be removed by a dental hygienist.
Very deep discoloration -from such causes as excessive flouride, antibiotics, iron therapy or in the case of a dead tooth, blood secretion in the dentine is more difficult to obliterate.
A dentist can apply bleaching agents , bond a white sealant to the enamel, or cap the tooth with a porcelain or plastic crown .
Missing teeth should be replaced as soon as possible not only for the sake of appearance but also to keep other teeth from moving into the gap and spoiling the bite.
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