Abstract: The sagittal position of the maxillary central incisor determines the aesthetic appearance of orthodontic patients. In orthodontic clinical diagnosis and treatment, patients with maxillary protrusion need to be treated with a reduction of four premolars to maximize the adduction and adduction of the upper and lower anterior teeth to improve the lateral appearance and solve the problem of suddenness. Traditional orthodontic treatment can make the maxillary central incisor adduct 5.78mm, and implant anchorage can increase the maximal adduction of the maxillary central incisor to 8mm, but in the process of adduction of the maxillary anterior teeth, a few maxillary Incisors can invade an important anatomical structure of the maxilla, the incisive canal, which leads to complications such as root resorption and teeth loose. Therefore, this paper reviews the research progress of the relationship between the incisive canal and the position of the maxillary central incisor.

Key words: incisive canal, maxillary central incisor , maxillary central incisor traction, cone-beam computed tomography