Geen hadeeth, wel een fatwa:
Question: Is it permissible to go to the dentist to get your teeth whitened, meaning that the dentist uses some chemicals to make the teeth white again after they have changed color due to lack of care? Is this changing the creation of Allah?
Answered by Sheikh Husayn al-Jabûrî, professor at Umm al-Qurâ University
It is permissible to go to a dentist to get your teeth whitened. This is not a case of changing Allah’s creation. You are only restoring your teeth to their original condition by removing extraneous stains from them.
And Allah knows best