Fig. 2
From: Canine edge width and height affect dental esthetics in maxillary canine substitution treatment
Example of the images used in the study. The canine edge width was based on the percentage of the incisal width of the maxillary central incisor and categorized to 0%, 12.5%, 25%, 37.5%, 50%, 62.5%, and 75% of the central incisor width. The canine edge height was defined as the distance of the incisal edges between the maxillary canine and central incisor, and categorized to − 0.5 mm, 0 mm, 0.5 mm, and 1.0 mm