1 = corresponding to the position of the deciduous absent canine.
2 = localized between the distal part and the midline of the lateral incisor.
3 = localized between the mesial part and the midline of the lateral incisor.
4 = localized between the distal part and the midline of the central incisor.
5 = localized between the mesial part and the midline of the central incisor.