Lingual Invisalign is a method of aligning teeth by placing personalized brackets and orthodontic archwires on the lingual side of the teeth. No orthodontic devices are visible from the outside, avoiding the work and social obstacles caused by the brackets and wires attached to the tooth surface by traditional orthodontic techniques (labial side). As a result, this technique became popular among patients with high aesthetic requirements, such as actors, lawyers, and teachers, as soon as it was introduced. Lingual invisalign is technically difficult and expensive to correct. There are already many orthodontically strong hospitals in China that offer it as a high-end treatment technique for patients to choose from.