How much gel to put in whitening trays

Use only a small bead of whitening gel in each tray tooth compartment, following the product instructions and wiping away overflow.

The short answer

Whitening gel usually contains a peroxide that contacts the outer enamel surface. A tray compartment needs enough gel to cover the tooth surface, not enough to fill the space or touch the gums.

What is the direct answer?

What does this question mean?

Place a small bead in the front portion of each selected tooth compartment, seat the tray, and remove visible excess from the gumline. Do not add gel to compensate for a poor-fitting tray or leave it on longer than directed.

What can you do next?

Stop and seek dental advice if burning, marked gum whitening, persistent pain, or severe sensitivity occurs. A dentist should assess cavities, cracks, gum inflammation, restorations, or enamel defects before further whitening.

When should you seek dental care?

Ask which teeth should be whitened, whether your tray fits correctly, how long each application should last, and what to do if gel contacts your gums or sensitivity develops.