Invisible Orthodontics, in Dentistry, is the technique needed for aligning the teeth by the use of transparent masks not visible to other people. The difference compared to traditional methods is the ability to remove them when eating and brushing your teeth; moreover, no wires, elastic bands and fixed attachments are used above the teeth. Each mask is used for about 15 days and, millimetre by millimetre, the teeth are in line creating regular smiles.