Fig. (2) Set two of smile photographs with various heights of gingiva of canines. A. Gingival height longer by 1 mm in relation to the central incisor (+1), B. Gingival height of the same height as the central incisor (0), C. Gingival height longer by 0.5 mm in relation to the central incisor (+0.5), D. Gingival height shorter by 1 mm in relation to the central incisor (-1), E.Gingival height shorter by 0.5 mm in relation to the central incisor (-0.5).