Other types of  lingual braces are made of stainless steel, but are not customised. For this reason, lingual braces are mainly indicated for limited treatments, such as cosmetic smile improvement. These are light, small recurrences of previous orthodontic treatment in the anterior region of the dental arches (the so-called “social” treatments of the six front teeth), of short duration (4-6 months). As an alternative to lingual orthodontic treatment with incognito braces, it is possible to use the personalised self-ligating ALIAS tongue hooks.