Evaluating upper lip changes during smiling and at rest in Indian population
Conclusions: High smile patterns with more vertical smile are more common among females and low smile patterns are more common among males. With age, the smile tends to be more horizontal in both genders.
Source: Indian Journal of Dental Research - Category: Dentistry Authors: Sagar Dahiya Gunjan Negi Kirti Dahiya Anirudh K Mathur Prasad Chitra Source Type: research