In orthodontic treatment, the torque of anterior teeth is of great significance, which affects not only the appearance of anterior teeth but also the occlusal relationship of posterior teeth. Thus, how to control the torque of an anterior tooth with digital technology has become a focus of research on orthodontic applications. However, controlling the torque of anterior teeth is difficult, and current designs have been confusing many orthodontists. Basing on the literature and clinical cases, we discuss the characteristics, key points, and design skills of for controlling the torque of anterior teeth of individualized labial appliance, individualized lingual appliance, and invisible appliance, to help orthodontists and provide a reference for the digital design of anterior teeth torque in clinic.
