Objective To study the morphology of mouth and lips in 1 to 6 years old children of Han nationality in Shandong Luxi and to provide average value of mouth and lips for repairing children’s congenital or postnatal facial deformity. Methods Mouths and lips of 420 normotrophic children(male 210, female 210, age 1 to 6) were measured. All children were divided into 10 groups according age and sex, 20 oral measurement items, such as the height of upper lip, the height of lower lip, the breadth of mouth, the height of philtrum crest, the height of lip peak, the length of unilateral lip, the distance of lip peak and the angle of lip peak, were used to assess the morphology of mouth and lips. Results All measurement items increased with age, and there was no significant difference between the male and the female in measurement items before 4 years old. The measurement items of oral breadth, such as mouth breadth and length of lateral labial arch crista, grew quickly at 5 to 6 years period. Conclusion There were different developmental features in upper lip height and breadth, and these growth characteristics should be fully considered in repairing cleft lip and facial deformity.
