Dr Thean Tsin. Piao, president of the Aesthetic Dentistry Society Singapore, says that besides recent technological advancements in the technique, the growth in patient numbers is also due to foreigners who opt for treatment here because it is cheaper.

In general, teeth whitening techniques, considered a purely cosmetic procedure, can b e divided into over the counter (OTC) products and prescribed treatments.

Over the counter products comprise anything found in pharmacies, from toothpastes and gels to kits complete with tools and a mould set. Prices range from a couple of dollars to about $90. For most, the bleaching agent is peroxide-based.

According to dentists, prescribed treatments provide faster and clearer results than

Over the counter products be cause stronger peroxide concentrations and customized

Techniques are used. Prescribed treatments basically involve either a take-home bleaching regime or a bleaching procedure done at the clinic. The two can be offered as a package. Take-home kits range from $450 to $900. Patients we are a custom- fitted

mould that holds the bleaching gel for two to four hours daily. Periodic reviews by

the dentist will be conducted.

The in-office procedure involves a one to two hour session where light is used to activate a high concentration of bleaching gel applied to the teeth. On average, it can cost between $800 and $1, 200.

Be prepared for side effects such as sensitivity in the teeth and slight gum irritation, which affects 60 to 70 per cent of patients.

Dentists also caution against being over zealous with over the counter products even after going for an in office treatment. This can be damaging to the teeth and gums.

Generally, results from professional treatment may last for months to years, depending on

patients’ eating habits and teeth condition. Also, the whitening effect varies according to individuals and there is no surefire way to guarantee a certain degree of whiteness.

In general, the most important process of teeth whitening is the diagnosis of the cause of

discolouration to ensure relevant treatment. Problems ranging from leaked fillings to gum

diseases have to be addressed first before any whitening can be done.

In some cases where discolouration is too severe, other techniques like veneers- a porcelain shell permanently bonded to the front of a tooth to mask imperfections might be recommended.

Also, children be low the age of 16, pregnant or lactating women, and anyone with conditions like allergy to peroxide or light, are excluded from the procedure.

Because of this, Singapore Dental Association vice president Raymond Ang warns

against seeking teeth whitening services from operators who are not qualified dentists. These are

unregulated.

Dr Ang says that such procedures should only be done by dentists as they are able to identify and manage any problems or complications.