Article:
Crown Lengthening Techniques and Modifications to Treat Excessive Gingival Display

Summary:
Although a smile may convey different emotions depending on the
socio-cultural context, in North America, it is generally associated with positive
emotional states such as happiness, pleasure, and amusement. An individual may
be perceived as more attractive, friendly, intelligent, trustworthy, self-confident, or
even successful based on their smile.