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

https://www.mediafire.com/file/2r9zrhxm96z181z/pdf-20492-16609.pdf/file

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