How does professional GLO whitening lighten natural teeth?
A professional GLO whitening system uses a peroxide gel with a blue LED mouthpiece to lighten natural tooth enamel and dentine.
How does the dentist control professional GLO whitening?
Professional GLO whitening combines peroxide gel with blue light, while the dentist controls the examination, gel placement, and exposure. It changes the colour of natural tooth structure, not crowns or fillings.
How does the mouthpiece keep whitening gel near the teeth?
The light activates the gel while the tray keeps it close to the tooth surface. Existing restorations may remain their original shade, so a shade assessment matters before treatment.
What should be checked before professional tooth whitening?
A clinician checks decay, gum inflammation, cracks, exposed root surfaces, and restoration colour before whitening. They then isolate the gums, fit the tray, apply the prescribed gel, and monitor comfort during timed cycles.
When should persistent pain or sensitivity be reviewed?
Contact a dentist if you have sharp pain, untreated cavities, bleeding gums, or sensitivity that persists after whitening. Facial swelling, fever, or trouble swallowing needs urgent dental assessment.
Keep reading
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.

