This medical device is a transparent polymer for medical use, with accurate finishes to eliminate the risk of gum inflammation. It is anti-allergic and does not contain bisphenol A or phthalates plasticizers. Resistant to time and wear, it has an elasticity that allows the gradual and accurate movements of the teeth. LINEO responds to the aesthetics and comfort of the wearer and allows for thorough cleaning of the teeth thanks to its removability, aligns the teeth without trauma with slow micro-movements, and in harmony over time does not require tiring changes to habits daily. The LINEO aligner is characterized, in the vestibular part, by a gingival festoon for impeccable aesthetics. On the contrary, the edge of the lingual/palatine part, slides about 1 mm from the gingival festoon, increasing the strength of the aligner and the patients comfort.