Tooth Whitening

Today I did a presentation on tooth whitening at school, and here are some of the things I learnt:

There are 2 types of stains:
1. Extrinsic – these are surface stains caused by things such as tobacco, coffee and tea.
2. Intrinsic – these are internal stains. These might be caused when treated with an antibiotic while your teeth are still forming, or when there is trauma to the tooth which may result in the death of a tooth’s nerve.

Extrinsic stains may be removed by a dental professional or by using a whitening toothpaste where as intrinsic stains are usually removed by being bleached, bonded or crowned.

How it works:

1. If you have teeth whitening you will need to make several visits to the dental surgery over a couple of months.
2. The dentist will take an impression of your teeth to make a mouthguard and will show you how to use it with a bleaching gel.
3. Then you would use your mouthguard at home, regularly apply the gel for a specified period of time over two to four weeks.
4. Some whitening gels can be left on for up to eight hours at a time, which shortens the treatment period to one week

Disadvantages:
Tooth whitening isnt permanent and doesn’t work on dentures, crowns, fillings or veneers.
Also, there is a chance your gums can be sensitive to the chemicals used in teeth whitening, especially if you already have sensitive teeth.

That’s all for this week. More next week! 🙂

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