Aligners, also known as clear aligners, are orthodontic appliances used to align teeth. They are made of plastic and are transparent.

The modern “clear aligners” were developed and patented in the USA in 1998. The patent expired in 2017 and companies such as bestsmile are now introducing aligners in Europe. Aligners can correct mild to moderate cases of misaligned teeth in a significantly shorter time and at a lower price than conventional braces. The plastic aligners are made of transparent PET and PU, which allows for a discreet, hardly visible treatment. Aligners are therefore often referred to as clear braces. The function is similar to metal braces: a continuous pressure on the teeth moves the misaligned teeth into the correct position. Some treatments may require attachments.