The difference between in-office and at-home whitening

Teeth whitening is a minimally invasive and relatively low-cost procedure, making it one of the most popular cosmetic dentistry treatments. Although it does not provide a permanent solution for tooth discoloration, the results are essentially immediate, and the effects can last for several months with proper care.

When it comes to teeth whitening, most people think of professionally administered in-office treatments. However, there is a wide range of at-home, do-it-yourself whitening options available as well. In this feature, we compare these two methods, helping you weigh the pros and cons of each.

How They Work

In-office teeth whitening is performed by trained dental professionals, ensuring safe and reliable bleaching results. The outcomes of professionally administered treatments are typically more effective, as dentists use higher-concentration bleaching gels. Several popular in-office whitening systems include Zoom, BriteSmile, Opalescence, and LumiBrite. While the method of application and cost may vary from product to product, the overall in-office whitening process is relatively similar across these options.

Our dentist will begin by “prepping” your teeth to remove plaque and debris before treatment. In addition, a thorough dental exam will be performed to ensure optimal tooth and gum health. Pre-treatment photos may be taken to allow you to see the before-and-after results.

To begin the whitening process, a cheek retractor is used to expose the teeth. A liquid rubber dam or hardening resin is applied to the gum tissue for protection. A hydrogen peroxide bleaching gel is then applied to the teeth, where it remains for 15 to 30 minutes. The gel is then removed and reapplied for one or more additional sessions of 15 to 30 minutes each. Certain whitening treatments (such as Zoom) incorporate a high-intensity light to help activate or enhance the bleaching process. Results are visible immediately, although the full effect of the treatment may take a couple of days to appear.

At-home teeth whitening is a do-it-yourself alternative to professional treatments. It typically costs less and offers the convenience of whitening your teeth on your own schedule, without the need to visit a dentist. However, at-home whitening products generally contain lower concentrations of hydrogen peroxide, which means they may not produce the same level of shade change as professional treatments.

Products such as brush-on whiteners, strips, and trays can be purchased online or at pharmacies and grocery stores. Higher-concentration at-home whitening kits are available through your dentist. You may be surprised to learn that some dentists believe in-office results can be achieved at home with these dentist-dispensed kits. The reason is that consistent, correct use over time can intensify the bleaching effect, with multiple applications gradually resulting in greater shade improvement.

The method of application varies significantly depending on the type of product used. However, it is recommended to begin an at-home whitening regimen after a professional dental cleaning, as this can help you achieve the best results. It's important to note that overusing tooth bleaching products—even those with lower concentrations—can be harmful. Always follow the instructions carefully to avoid doing more harm than good.

In addition to standard trays, strips, and brush-on applicators, there are other products available, such as whitening toothpaste, mouthwash, floss, and even chewing gum. However, take these products with a grain of salt. While they may offer minor, short-lived whitening effects, their results pale in comparison to those achieved with more traditional whitening methods. They are in no way comparable to in-office whitening treatments.