Before after whitening strips
Whitening strips can lighten some natural tooth stains, but results vary with stain type, enamel condition, and existing restorations.
The short answer
Before-and-after whitening-strip results depend on the peroxide formulation, wear instructions, starting shade, stain type, and whether the visible teeth are natural or restored. Surface stains may respond more readily than discoloration within dentin, and fillings or crowns do not change color with whitening.
What is the direct answer?
What does this question mean?
Whitening strips hold peroxide against the front surfaces of teeth, allowing the agent to oxidize some colored molecules. A photograph can also look different because of lighting, camera settings, hydration, and angle, so it is not a precise clinical shade measurement.
What can you do next?
Read the product directions, keep gel off the gums, and apply strips to clean, dry teeth as instructed. Take comparable photographs only if you want to track appearance, and stop the course if you develop significant sensitivity or gum irritation.
When should you seek dental care?
See a dentist before whitening a painful, cracked, decayed, or heavily restored tooth. Seek care for severe sensitivity, gum burns, uneven darkening, or a single tooth that remains gray or brown after the surrounding teeth lighten.
What should you ask the dentist?
Ask which stains are present, whether the enamel and gums are healthy, and whether restorations will need replacement for a matched shade. Ask whether professionally supervised trays or a non-whitening option better fits your teeth.
Frequently asked questions
Why are results uneven?
Teeth may have different stains, enamel conditions, restorations, or strip contact, producing different color changes.
Can strips whiten a gray tooth?
A gray single tooth can have an internal cause and should be examined rather than treated as ordinary surface staining.