My teeth become yellow after 15 days of scaling. Why?

Hello,

Welcome to icliniq.com.

I believe you are referring to scaling only, and not teeth whitening procedure. The scaling procedure only removes debris and calculus from the surface of the tooth and gums.

For getting pearl type white teeth, you need to do teeth whitening procedure or bleaching. But still, after some time, the teeth will become more yellowish. You need to do brushing at least two times a day. A little bit of yellow teeth is normal. For permanent white teeth you can do teeth lamineering procedure which is a costly procedure where the front side of the tooth is slightly cut and a pure white ceramic layer is put over it.

I hope this helps.