Fig. 1From: Perception of smile esthetics by laypeople of different agesAltered incisal edge position of the maxillary central incisors in 0.5-mm increments. 1 0.5Â mm intruded; 2 0Â mm extruded; 3 0.5Â mm extruded; 4 1.0Â mm extruded; 5 1.5Â mm extruded; and 6 2.0Â mm extrudedBack to article page