nasolabial angle
The angle formed between the nose and upper lip in profile view, used to assess facial aesthetics and surgical outcomes.
Full Definition
The nasolabial angle is the angle formed between the columella of the nose and the upper lip when viewed in profile, typically measuring between 90-110 degrees in aesthetic norms. This measurement is a critical parameter in craniofacial surgery for assessing facial balance, planning rhinoplasty procedures, and evaluating the effects of maxillary repositioning on nasal aesthetics. Changes in maxillary position, particularly advancement or impaction, can significantly affect the nasolabial angle, potentially requiring concurrent nasal adjustments to maintain aesthetic harmony. The angle is influenced by nasal tip projection, upper lip position, and dental inclination, making it an important consideration in comprehensive facial analysis.
Usage
Usage note: Measurements should specify the method used (clinical photos vs. radiographs) as values may differ between techniques.
In Context
- "The nasolabial angle increased from 95° to 105° following maxillary advancement." — Post-operative analysis
- "Pre-operative assessment revealed an acute nasolabial angle requiring correction." — Aesthetic evaluation