Disclosed is a personalized lingual self-locking orthodontic appliance, comprising several lingual self-locking brackets and an arch wire for connecting the individual lingual self-locking brackets in series. The lingual self-locking brackets each comprise a base plate (1) fitting with a corresponding tooth position lingual surface and a bracket body (2) fixedly connected to the base plate (1), a lock cover (3) is hinged on the bracket body (2), the lock cover (3) is hinged on the bracket body (2) through an elastic shaft (221), and a locking slot (21) is arranged on the bracket body (2) and used for locking the tail end of the lock cover (3). Using this personalized lingual self-locking orthodontic appliance, the several bracket bodies (2) are connected in series through an arch wire, and the base plates (1) at the bottom of the bracket bodies (2) are made of a flexible metal, and during the series connection process, the self-locking of positions of each bracket body relative to the arch wire is realized by locking the lock covers (3) in the locking slots (21). The position of each bracket body of this self-locking orthodontic appliance has a better flexibility, which can effectively improve the comfort of a patient and is also convenient for doctors during clinical operations.La présente invention se rapporte à un appareil orthodontique lingual auto-bloquant et personnalisé qui comprend plusieurs brackets linguaux auto-bloquants et un fil métallique pour arc destiné à relier en série les brackets linguaux auto-bloquants. Les brackets linguaux auto-bloquants comprennent chacun une plaque de base (1) comportant une surface linguale de positionnement des dents correspondante et un corps de bracket (2) raccordé de manière fixe à la plaque de base (1), un couvercle de verrou (3) est articulé sur le corps de bracket (2), le couvercle de verrou (3) étant articulé sur le corps de bracket (2) au moyen dun arbre élastique (221), et une fente de verrouillage (21) est agencé
