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

https://www.mediafire.com/file/xej1550qvuidy9e/pdf-5905-9752.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.