Complex sentence: The maxillary central incisor is usually the most visible tooth, since it is the top center two teeth in the front of a mouth, and it is located mesial (closer to the midline of the face) to the maxillary lateral incisor.
Split into simpler sentences: The maxillary central incisor is a tooth in the front upper jaw, or maxilla, and is usually the most visible of all teeth in the mouth. It is located mesial (closer to the midline of the face) to the maxillary lateral incisor.