Teeth could be bleached brilliant white without being damaged، scientists claim، as the Daily Mail said.
Research may have revealed a new chemical to use for whitening teeth which could avoid the enamel-damaging effects of hydrogen peroxide.
Hydrogen peroxide – which is also used to bleach hair – is a common teeth whitening treatment but it can make them more sensitive and wear them down.
Now a study published by the American Chemical Society suggests using a modified form of the chemical titanium dioxide could be an effective and safe teeth whitener.
Titanium dioxide is used all over the world to whiten plastics، paper، paint، pills and toothpastes. It is also used in makeup to lighten skin tones.
One senior dentist has called the research 'potentially exciting' and says it could avoid some of hydrogen peroxide's side effects. In an experiment to check whether titanium dioxide could work in theory، scientists combined the chemical with a natural glue called polydopamine.
They say the combined chemicals could be applied to teeth then activated under blue light in the same way hydrogen peroxide currently is.
And their research found، over four hours، the chemical has the same whitening ability as hydrogen peroxide and did not damage the teeth at all. 'This is interesting research on a new technique used for whitening modified titanium dioxide nanoparticles with polydopamine،' said Dr Richard Marques، dentist at Wimpole Street Dental in London. 'This could stop hydrogen peroxide side effects' 'It is potentially exciting and could stop some of the side effects from hydrogen peroxide. However، hydrogen peroxide is still the whitening agent of choice.
'More research would need to be carried out before this could be used in practice. It would also have to be regulated by the authorities in order to be used in clinic.'
Teeth become discoloured over time because of stains from food and drinks، particularly those with strong colours like red wine، coffee and tea.
The colours from food and drink – which are rarely as white as people would like their teeth to be – are absorbed by pigment molecules in the teeth.
The most common teeth whitening chemical، hydrogen peroxide، works by pulling the unwanted colour back out – a process which is made faster by the blue lights in order to reduce damage from the chemical being left on for a long time.