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

https://www.mediafire.com/file/qco11tqirgje9fq/pdf-56859-13977.pdf/file

If you clench or grind, discuss it before whitening; enamel wear and exposed dentin can heighten sensitivity, requiring customized protocols and gentler gels.