If you clench or grind, discuss it before whitening; enamel wear and exposed dentin can increase sensitivity

https://milowbea115.theburnward.com/can-you-bleach-teeth-with-braces-a-guide-to-timing

If you clench or grind, discuss it before whitening; enamel wear and exposed dentin can increase level of sensitivity, needing customized procedures and gentler gels.