Perceptions of Altered Smile Esthetics: A Comparative Evaluation in Orthodontists, Dentists, and Laypersons

Figure 1

Illustration of alterations in the smile arc. (a) The smile arc is flat with a large gingival display in the posterior region compared to that in the anterior region, where the teeth arrangement aligns with the curvature of the lower lip. (b) An ideal smile arc that is parallel to the curvature of the lower lip. (c) Excessive smile arc causing the lower teeth to be displayed.

(a)

(b)

(c)