Take home tooth whitening kits
Also known as tray whitening, this involves using a special kit at home. Before tooth whitening starts, the dentist will examine your teeth and mouth to make sure that everything is healthy. Provided there aren't any problems that need to be addressed first, the dentist will take impressions (i.e. a mould) of your teeth. The dentist sends these to a specialist dental laboratory, who make flexible dental trays with a tiny air gap to allow the whitening gel to spread evenly over your teeth. The dentist will also record the shade of your teeth using a special calibrated guide so that he can measure how much the colour has changed when you are reviewed.At the next appointment, your dentist will check that the trays are a good fit and will give you instruction in how to use them. The trays are usually worn at night while you are asleep. In the morning, you simply take them out and brush away the remaining gel. The tooth shade will gradually change and you continue to use the kit until the desired shade is achieved - your dentist will review your progress with you.
It is also essential to consider tooth whitening whenever you are having a new crown, filling, veneer, denture or inlay. This is because teeth can be whitened but crowns, inlays, etc. cannot. If you have new crowns and then later decide you’d like whiter teeth you may need to have the crowns remade (at considerable expense) just to match your new tooth shade.
There is a limit to just how much you can whiten a tooth. Teeth that are naturally very white but have been stained by smoking, drinking red wine, tea, coffee, etc., are likely to whiten quite easily and to achieve a very bright white. Your dentist can give you a better idea of the likely shade change at your dental examination.
Crowns and veneers can also change the appearance of teeth, but they require a quantity of tooth to be removed in the preparation process. Modern preventive dentistry is all about preserving healthy tooth tissue, so crowns and veneers aren't the preferred treatment option if all that is required is a colour change.