Abstract: Objective To study the aesthetic evaluation of lip Situation alteration on the Profiles,Methods A young male and a female who met the soft and the hard tissue measurements criterion were chosen. Their profile photographs were digitized. The lip situations were protruded and retruded 2mm,4mm,6mm comprising 14 profiles including the original photos. The sample of individuals rated these pictures comprised 41 orthodontic professionals,43 plastic surgeons,41 parents of patients,86 orthodontic patients and 41 laymen.K-W analysis and independent sample t-tests were used to compare the preferences of the groups. Results The original photos got the highest scores.The severe protruded lips(c+6) were the least prefered.Orthodontists were more sensitive than other groups when faced the male protruded lip(c+4) (P=0.01),meanwhile orthodontic patients were more sensitive than the parents(P=0.02).Males more like protruded lip(c+4) than females(P=0.04),while females more like retruded lip(c-2) than males(P=0.03).The middle-age group were more tolerate than other groups when they rating the ugly female profile(c-4)(P =0.02).Conclusions Orthodontists were found to be more critical than other people. Patients were found to be more critical than parents. Females admire the more retruded lip situation.The middle-aged people were the most tolerant.

Key words: facial profile, aesthetic evaluation, lip situation