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

https://blogfreely.net/dernesvhbz/teeth-whitening-expense-breakdown-purchasing-your-smile-p6m4

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.