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

https://www.mediafire.com/file/efo1zs05lbdd1rj/pdf-6611-3620.pdf/file

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