Teeth whitening has actually been around for over a century, and various agents have been used for it over time. Approximately half of these agents used substances that oxidized the “colored” organic compounds in teeth, while some contained corrosive or even toxic ingredients, such as potassium cyanide.

Nowadays, teeth whitening is harmless under normal conditions. Such services should be entrusted to professionally trained healthcare workers in dental clinics, preferably dentists.

In most cases, the teeth whitening process is painless. In some cases, people may experience slight sensitivity, which is temporary and usually subsides quickly.

The teeth whitening procedure usually takes about one to two hours, depending on the chosen whitening method and the individual needs of the client.