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Whitening agents used  by dentists differ, but 5,000 people have received the BriteSmile treatment (15 per cent  hydrogen peroxide)  in Hong Kong since 2001 - and the figures are rising, according to Kenny Yue from  supplier TWL.

Blue-light treatment: $4,000-$6,500

Home treatment: $5,000-$6,000

Porcelain veneer: $4,500-$6,000

per tooth



Who said a smile costs nothing