Teeth whitening: in-office vs at-home
Both approaches use peroxide gel. The difference is speed, supervision and how much control you have over the result.
Whitening works by allowing peroxide to pass through the enamel and break down the coloured compounds inside the tooth. Stronger gels work faster but irritate gums and nerves more easily. That trade-off is the whole decision.
In-office whitening
A concentrated gel is applied to the teeth in the dental chair, with the gums protected. A session usually takes about an hour, and many patients see a noticeable change the same day. The advantages are speed and supervision: if something is uncomfortable, it stops immediately.
The disadvantage is that the result arrives all at once, and sensitivity afterwards can be significant for a day or two. Some patients need a second session.
Custom take-home trays
We take impressions and make trays that fit your teeth, then you use a lower-strength gel over a week or two. It is slower, but you control the pace, stop if sensitivity builds up, and can top up later with the same trays.
Shop-bought kits are not the same thing. A generic tray that does not fit can leak gel onto the gums and give an uneven result.
What whitening cannot fix
- Crowns, veneers and fillings. These do not change colour. If a restoration is much darker than the surrounding teeth, replacing it may be the better answer.
- Grey colour from inside the tooth. This can follow an injury or root canal treatment and may need a different approach.
- Staining below the surface. Some stains respond only partially, and no clinician can promise a specific shade.
Keeping the result
Coffee, tea, red wine and time will gradually darken teeth again. Most patients top up once or twice a year, either with trays or a short in-office session. Brushing with a fluoride toothpaste and regular cleanings help more than expensive whitening toothpastes.
If you have sensitive teeth
Tell us before treatment. Recession, cracks or recent fillings can make whitening uncomfortable, and sometimes a different treatment is the better route. At our Lake Mary office we check the teeth and gums before whitening, rather than selling a kit and hoping for the best.
Have a question this article did not answer?
Call the Lake Mary office and ask. We will tell you whether you need to come in, and what the visit would involve.
946 International Parkway, Suite 1550, Lake Mary, FL 32746