A wise man said a good smile could light up the entire room. So what is the secret behind a good smile? There are many factors that play a crucial role in structuring a “good” smile. First and foremost, one needs to be aware that “facial beauty is based on the principles of symmetry, proper alignment, and proportions of the face” (Davis, 299). The notion of symmetry, proper alignment, and proportions of the face also transitions into a smile and how it’s formed. Don’t Give Me Lip!
Two of the main components of a symmetrical smile are the boundaries of a smile, the lips. Nicholas Davis, of the American Academy of Cosmetic Dentistry, argues that “one of the most important soft tissue feature helpful in evaluating the dental–facial composition and establishing a smile design is Lip analysis” (299). To understand lip analysis thoroughly, one needs to understand the lip mobility and lip morphology, states Davis. Lip morphology breaks down into “width, fullness, and symmetry of the lip” (Davis 300). Davis states, “wide lips make for a wide smile. In general terms, a smile that is at least half the width of the face, at that level of the face, is considered esthetic. The fullness and symmetry of the upper and lower lips should also be documented. The fullness of the lip, or lip volume, can be categorized as full, average, or thin. Lip symmetry involves the mirror image appearance of each lip when smiling” (299).
The idea of lip mobility coincides with lip contact, where and how much the lip touch the teeth, or each other. These two factors determine how much gingival tissues (gums) and tooth structures should be reveled (Davis, 299). This is important because too much or too less display of either of these determinants could jeopardize the integrity and beauty of the smile. The concepts of lip mobility and lip contact are also important when “fixing defects such as a gummy smile, a smile which reveals too much for the gingival tissue”