Abstract: Objective To investigate the activity of nasal tip of the youth female in Han nationality comparing with the activity of nasal tip of those who have undergone rhinoplasty, and to provide morphologic basis and assessment criteria for nasal plasty. Methods External noses of 100 youth female (natural group) and 30 female undergoing rhinoplasty with alloplastic materials (operative group) were chosen. After the activity critical point A was confirmed, the activity of nose tip, the length of A-P and the nasal length were measured. Results The activity of nasal tip in natural group was 35.73 ° ± 4.72 ° , and 21.45 ° ± 7.53 ° in operative group. There were significant differences between 2 groups. The length of A-P in natural group was (16.62 ±1.95) mm while it was (25.89±10.16) mm in operative group. The nasal lengths were both in normal range. In operative group, 63%of the patients felt the decent of the nasal tip activity, 30% were not satisfied with the operation because of this. Conclusion Rhinoplasty with alloplastic materials could lower the activity of nose and have influence on the patients ’ assessment for the surgery.

Key words: Activity of nasal tip, Anthropometry, Rhinoplasty