Causes of gummy smile: 01.20 min. Ref: 76
In general the ideal smile line should be a curve parallel to the lower lip, and the upper lip should reach the gum margin of the upper central incisors.
lip should reach the gum margin of the upper central incisors. But there are several
situations in which this smile line can be altered, such as an overly long upper lip, excessive maxillary
excessive upper lip, an overgrowth of the upper jaw, an altered passive eruption, a malocclusion
malocclusion, tooth wear that has decompensated the proportion between tooth and gingiva, etc.
between tooth and gum etc.