My tooth color has been turning yellow for a long time.
I like coffee and drink it every day, so my teeth color has changed.
How nice it is to see clean white teeth when you smile.
I think teeth whitening would look neat and clean, so it would be good.
Is teeth whitening a one-time procedure, or do I need to do it multiple times?
I am curious about how much the cost will be.
I also want to know about precautions and side effects.
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