Theoretically, the maxillary teeth are elongated, i.e., affecting the dental implants. When a tooth is missing, if it is not restored in time, the neighboring teeth will tilt to the side of the gap and the opposing teeth will elongate, resulting in insufficient space to affect the later restoration. As long as the maxillary teeth are elongated, then the adjacency of the elongated teeth and the overall curve of the oral teeth will be abnormal. If the elongated teeth are not dealt with, how much the maxillary elongation is, how much the dental implants in the mandibular edentulous area will be shorter, resulting in abnormal curves of the mandibular teeth, formation of filled cusps, causing food implantation; when the gap is less than 6mm, it will affect the possibility of implantation. Therefore, minor elongation can be modified by grinding through alignment, while severe cases require root canal treatment after crown amputation to provide clearance. It is recommended that missing teeth be restored as early as possible to avoid delays.