Deep coverage of teeth mainly refers to the upper front teeth are positioned too far forward or too large, and the lower teeth are positioned too far back or too small, after which misalignment will be formed. If the condition is more serious, it can be corrected by using orthodontic appliances, such as planar guide plate orthodontic appliance and fixed orthodontic appliance. 1. Plane guide aligner: mainly for deep overjet with high alveolar bone, the position of front teeth can be lowered with movable orthodontic appliance, so that the position of plane guide plate can be increased, so that the position of upper and lower teeth can be kept in the same position, and the purpose of correction can be achieved. 2. Fixed Orthodontic Appliance: The fixed orthodontic appliance is mainly used to correct the tilted jaw plane and improve the deep overjet by generating a moving force on the teeth. If the deep overjet is found to be serious, it is recommended to consult the doctor as soon as possible and correct it according to the requirements, but it is also necessary to choose the best orthodontic method according to one’s financial ability and actual conditions.